Difference between revisions of "Astronomy/DSOs"

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Revision as of 17:12, 9 September 2016

The Astronomy DSO list specifies which Deep Sky Objects may be covered in the Astronomy event that year.


2017 DSOs
Name Images Constellation Magnitude Distance Coordinates External Links
Henize 2-428 Image 2 Apparent: Absolute: Right Ascension: ; Declination:
Henize 3-1357 Image 2 Apparent: Absolute: Right Ascension:; Declination:
HM Cancri Image 2 Apparent: Absolute: Right Ascension:; Declination:
J075141/J174140 (two objects) Image 2 Apparent: Absolute: Right Ascension:; Declination:
M15 Image 2 Apparent: Absolute: Right Ascension:; Declination:
NGC 1846 Image 2 Apparent: Absolute: Right Ascension:; Declination:
NGC 2392 Image 2 Apparent: Absolute: Right Ascension:; Declination:
NGC 2440 Image 2 Apparent: Absolute: Right Ascension:; Declination:
Omicron Ceti Image 2 Apparent: Absolute: Right Ascension:; Declination:
Sirius A & B Image 2 Apparent: Absolute: Right Ascension:; Declination:
SN2011fe Image 2 Apparent: Absolute: Right Ascension:; Declination:
SNR 0509-67.5 Image 2 Apparent: Absolute: Right Ascension:; Declination:
SNR G1.9+0.3 Image 2 Apparent: Absolute: Right Ascension:; Declination:
SS Cygni Image 2 Apparent: Absolute: Right Ascension:; Declination:
Tycho's SNR Image 2 Apparent: Absolute: Right Ascension:; Declination:

Previous Years' DSO Lists

<spoiler text="2016 DSOs">

2016 DSOs
Name Images Constellation Magnitude Distance Coordinates External Links
2MASSJ22282889-431026 2MASSJ22282889-431026 1.jpg Image 2 Apparent: Absolute: Right Ascension: ; Declination:
51 Pegasi b 51 Pegasi b 1.jpg Image 2 Pegasus Apparent: Absolute: 50.9 ly Right Ascension: 22h 57m 28.0s; Declination: +20° 46' 08″
55 Cancri 55 Cancri 1.jpg Image 2 Cancer Apparent: Absolute: 40.3 ly Right Ascension: 08h 52m 35.81s; Declination: +28° 19' 51.0″
AB Aurigae 175px Image 2 Auriga Apparent: Absolute: ~470 ly Right Ascension: 04h 55m 45.8445s; Declination: +30° 33′ 04.292″
Barnard 68 175px Image 2 Ophiuchus Apparent: Absolute: 500 ly Right Ascension: 17h 22m 38.2s; Declination: -23° 49′ 34″
GD 165 175px Image 2 Bootes Apparent: Absolute: ~103 ly Right Ascension: 14h 24m 39.144s; Declination: +09° 17′ 13.98″
HAT-P-11b 175px Image 2 Cygnus Apparent: Absolute: 122 ly Right Ascension: 19h 50m 50.25s; Declination: +48° 04′ 51.1″
HD 95086 175px Image 2 Carina Apparent: Absolute: 296 ly Right Ascension: 10h 57m 03s; Declination: -68° 40′ 02″
HD 106906b 175px Image 2 Crux Apparent: Absolute: 300 ly Right Ascension: 12h 17m 53.0s; Declination: −54° 01′ 28″
HL Tauri 175px Image 2 Taurus Apparent: Absolute: 450 ly Right Ascension: 04h 31m 38.437s; Declination: +18° 13' 57.65″
HR 8799 HR 8799.jpg Image 2 Pegasus Apparent: Absolute: 129 ly Right Ascension: 23h 07m 28.7150s; Declination: +21° 08′ 03.302″
Kepler-186 175px Image 2 Cygnus Apparent: Absolute: 492 ly Right Ascension: 19h 54m 36.651s; Declination: +43° 57′ 18.06″
M42 175px Image 2 Orion Apparent: Absolute: 1344 ly Right Ascension: 05h 35m 17.3s; Declination: −05° 23′ 28″
T Tauri T Tauri 1.jpg Image 2 Taurus Apparent: Absolute: ~600 ly Right Ascension: 04h 21m 59.43445s; Declination: +19° 32′ 06.4182″
WASP-18b 175px Image 2 Phoenix Apparent: Absolute: 325 ly Right Ascension: 01h 37m 24.95s; Declination: –45° 40′ 40.8″
WASP-43b 175px Image 2 Sextans Apparent: Absolute: ~80 pc Right Ascension: 10h 19m 38s; Declination: −09° 48′ 23″
WISE 0855-0714 175px Image 2 Hydra Apparent: Absolute: 7.53 ly Right Ascension: 08h 55m 10.83s; Declination: –07° 14′ 42.5″

</spoiler>

<spoiler text="2015 DSOs">

2015 DSOs
Name Images Constellation Magnitude Distance Coordinates External Links
FU Orionis FU Orionis 1.jpg Orion Apparent: Absolute: ~1300 ly Right Ascension: 05h 45m 22.362s; Declination: +09° 04′ 12.31″ AAVSO
TW Hya TW Hya 1.jpg Hydra Apparent: Absolute: 176 ly Right Ascension: 11h 01m 52s; Declination: −34° 42′ 17″
2M1207 2M1207 1.jpg Centaurus Apparent: Absolute: 172 ly Right Ascension: 12h 07m 33.47s; Declination: −39° 32′ 54.0″
CoRoT-2 CoRoT-2.jpeg Aquila Apparent: Absolute: 930 ly Right Ascension: 19h 27m 06.496s; Declination: +01° 23′ 01.38″
HD 209458b HD 209458b.jpg Pegasus Apparent: Absolute: 154 ly Right Ascension: 22h 03m 10.8s; Declination: +18° 53′ 04″
HD 189733b HD 189733b.jpg Vulpecula Apparent: Absolute: 63.4 ly Right Ascension: 20h 00m 43.71s; Declination: +22° 42′ 39.1″
Kepler-7b Kepler-7b.png Lyra Apparent: Absolute: ~3400 ly Right Ascension: 19h 14m 19.6s; Declination: +41° 5′ 23.3″
GJ 1214b GJ 1214b.jpg Ophiuchus Apparent: Absolute: 42 ly Right Ascension: 17h 15m 18.942s; Declination: +04° 57′ 49.69″
Beta Pictoris Beta Pictoris.jpg Pictor Apparent: Absolute: 63.4 ly Right Ascension: 05h 47m 17.1s; Declination: −51° 03′ 59″
Fomalhaut Fomalhaut.jpg Piscis Austrinus Apparent: Absolute: 25.13 ly Right Ascension: 22h 57m 39.0465s; Declination: −29° 37′ 20.050″
HR 8799 HR 8799.jpg Pegasus Apparent: Absolute: 129 ly Right Ascension: 23h 07m 28.7150s; Declination: +21° 08′ 03.302″
WISE 1049-5319 WISE 1049-5319.jpg Vela Apparent: Absolute: 6.6 ly Right Ascension: 10h 49m 18.723s; Declination: −53° 19′ 09.86″
Gliese 229B Gliese 229B.jpg Lepus Apparent: Absolute: 18.8 ly Right Ascension: 06h 10m 34.6154s; Declination: −21° 51′ 52.715″
LP 944-20 LP 944-20.jpg Fornax Apparent: Absolute: 20.9 ly Right Ascension: 03h 39m 35.220s; Declination: –35° 25′ 44.09″
N159 N159.jpg Dorado Apparent: Absolute: 170000 ly Right Ascension: 05h 40m 04.2s; Declination: –69° 44′ 43″
M20 M20.jpg Sagittarius Apparent: Absolute: 5200 ly Right Ascension: 18h 02m 23s; Declination: −23° 01′ 48″

</spoiler>

<spoiler text="2014 DSOs">

2014 DSOs
Name Images Constellation Magnitude Distance Coordinates External Links
Mira (Omicron Ceti) Star mira full.jpg Mira illustration.jpg Cetus Apparent: 2.0 to 10.1 Absolute: ~-2.5 to 4.7 ~420 ly Right Ascension: 02h 19m 20.70s; Declination: -02° 58' 39.51" Chandra NASA Science News
Mira is the prototype for Mira variables, which are red giants that oscillate over long periods. It is a binary star system, with Mira A the red giant that is losing mass and Mira B the white dwarf that is accreting mass.
W49B W49b 1680.jpg W49b w44.jpeg Aquila Apparent: ~26,000 light years Right Ascension: 19h 11m 07s Declination: +09° 06' 00" Chandra
W49B is an SNR that is theorized to have a distorted shape and a black hole from the explosion that created the remnant. It may be the most recent black hole formed in the Milky Way.
Tycho's SNR (SN 1572) TychoSNR.jpg Tycho.jpg Cassiopeia Peak Apparent: -4 ~9000 ly Right Ascension: 00h 25m 17s; Declination: +64° 08' 37" Chandra NASA APOD
A Type 1a supernova remnant that burst in early November 1572 and was later studied by Tycho Brahe.
Vela SNR VelaSNR.jpg Vela.jpg Vela Apparent: 12 ~800 ly Right Ascension: 08h 35m 20.66s Declination: -45° 10' 35.2" APOD
The closest known supernova remnant to us with a notable pulsar and neighboring nebulae. Contains NGC 2736 or the Pencil Nebula, which is thought to have formed from part of the shock wave of the Vela SNR
G1.9+0.3 27949913 640.jpg H-398-2pan2 B radio.jpg Sagittarius Apparent: ~28,000 ly Right Ascension: 17h 48m 45s Declination: -27° 10' 00" Chandra NASA
Possibly the most recent supernovae, specifically Type Ia, in the Milky Way. It has an extremely asymmetric pattern. Explosion was likely highly non-uniform and unusually energetic.
Eta Carinae EtaCarinae.jpg New eta carinae.jpg Carina Apparent: -0.8 to 7.9 ~7,500 ly Right Ascension:10h 45m 03.591s Declination:−59° 41′ 04.26″ Chandra APOD
A hypergiant with a smaller companion. Massive supernova, very bright. It has a chance of exploding at any time, and will be so bright that it rivals the moon.
SS Cygni Image 1102-ss-cygni-binary-star.jpg SSCygni.png Cygnus Apparent: 7.7-12.4 370 ly Right Ascension: 21h 42m 42.804s Declination: 43° 35' 09.88" AAVSO Chandra
A recurrent nova with a very massive white dwarf and a red dwarf-type star cooler than our sun. Often classified as U Geminorum type dwarf nova.
T Tauri TTauri.jpg T Tauri 2MASS.jpg Taurus Apparent: 9.3-14 462 ly Right Ascension: 04h 21m 59.43s; Declination: +19° 32′ 06.42″ NASA APOD Universe Today
T Tauri is the prototype for T Tauri stars, which are the stars in the life stage between protostar and main sequence. there is a nebula located close to the star called Hind's Variable Nebula, which changes in luminosity as T Tauri varies.
GRS 1915+105 GRS1915+105 VLA.jpg Grs.jpg Aquila Apparent: 40,000 ly Right Ascension: 19h 15m 11.60s Declination: +10° 56' 44.00 Chandra
GRS 1915+105 is an x-ray binary star system containing a regular star and a black hole. It is one of the heaviest stellar black holes so far known in the Milky Way and has a self-regulating black hole.
47 Tucanae 47tuc salt.jpg 47Tucanae.PNG Tucana Apparent: 4.91 16,700 ly Right Ascension: 00h 24m 05.67s Declination: –72° 04′ 52.6″ Chandra APOD APOD
47 Tucanae is the second brightest globular cluster after Omega Centauri and one of the most massive globular clusters in the galaxy.
The Trapezium Orion1.jpg Trapcol.jpg Orion Apparent: 4 1,600 ly Right Ascension: 05h 35.4m Declination: −05° 27′ Chandra APOD APOD
The Trapezium is a relatively young open cluster in the heart o the Orion Nebula.
T Pyxidis 250px-Tpyx hst big.jpg TPyxidis.jpg Pyxis Apparent: 6.4-15.5 15,600 ly Right Ascension: 09h 04m 41.50s Declination: −32° 22′ 47.5″ AAVSO NASA APOD
T Pyxidis is a recurrent nova and nova remnant containing a sun-like star and a white dwarf. It is now close to the Chandrasekhar limit and might soon explode as a type 1a supernova.
Abell 30 A30 1680.jpg A30 w44.jpg Cancer Apparent: 15.6 5,500 ly Right Ascension: 08h 46m 53.50s Declination: +17° 52' 45.40" Chandra
Abell 30 is a planetary nebula in a special, rarely-seen phase of evolution. The evolution of A30 stalled and then started up again, so the planetary nebula was reborn.
RX J0806.3+1527 (HM Cnc) RXstar.jpg RXJ0806.PNG Cancer Apparent: 21.1 ~1600 ly Right Ascension: 08h 06m 23.20s; Declination: +15° 27' 30.20" Chandra Space.com
An x-ray binary system composed of two white dwarves that are rapidly orbiting each other. Their orbits are slowly getting closer, and the stars will eventually collide. Since they are faint, they are being observed by x-ray emissions.
V1647 Ori V1647.jpg Nasa ori star.jpg Orion Apparent: 1,300 ly Right Ascension: 05h 46m 13.10s Declination: -00° 06' 05.00" Chandra NASA
V1647 Ori is a FU Orionis variable star, a low-mass protostar still partly surrounded by its birth cloud. It is spinning as fast as it can without ripping itself to pieces.
V1 HV1-anim-500-22.gif V1.jpg Andromeda Apparent: 2.5 million ly Right Ascension: 00h 41m 27s Declination: 00h 41m 27s Hubblesite NASA
A Cepheid variable star in the Andromeda galaxy that began Hubble's discovery of the expansion of the universe by showing that the Andromeda galaxy was not part of our galaxy.
NGC 1846 1846.jpg NGC1846.PNG Doradus Apparent: 11.3 ~160,000 ly Right Ascension: 05h 07m 35.25s Declination: -67° 27' 38.9" Hubblesite NASA
NGC 1846 is a globular cluster located in the outer halo of the LMC. The most intriguing object is a faint green planetary nebula, and it doesn't seem to belong in the cluster.
NGC 3132 NGC 3132.jpg NGC3132 Master1.jpg Vela Apparent: 9.87 ~2,000 ly Right Ascension: 10h 07m 01.7640s Declination: −40° 26′ 11.060″ APOD APOD
NGC 3132 is a planetary nebula. There are two stars in the nebula, one of which is a white dwarf.

</spoiler>

<spoiler text="2013 DSOs">

2013 DSOs
Name Images Constellation Magnitude Distance Coordinates External Links
Cassiopeia A Cassiopeia A.jpg Cas a-2.jpg Cassiopeia Apparent: Peak=~6 ~11,000 ly Right Ascension: 23h 23m 26.7s ; Declination: +58° 49' 3.00" Chandra
Cassiopeia A is the youngest supernova remnant in the Milky Way Galaxy.
IGR J17091 IGR J17091.jpg Igr one.jpg Scorpius Apparent: ~28,000 ly Right Ascension: 17h 09m 7.92s; Declination: -36° 24' 25.20" Chandra
IGR J17091 has the highest ever known wind speed at 20 million miles per hour, which is only 3% of the speed of light.
NGC 6888/ WR 136 NGC 6888.jpg WR 136 and NGC 6888.jpg Cygnus Apparent: +7.4 ~5,000 ly Right Ascension: 20h 12m 35.00s; Declination: +38° 26' 30.00" Chandra
NGC 6888, also known as the Crescent Nebula, was created the powerful winds coming off of the Star WR 136, or HD 192163.
PSR J0108-1431 J0108-1431.jpg J0108-1431 xray.jpg Cetus Apparent: peak: 27.8 ~770 ly Right Ascension: 01h 08m 08.30s; Declination: -14° 31' 48.50" Chandra, Neutron Star Physics Blog
PSR J0108-1431 is, by far, the nearest pulsar, or neutron star, to Earth.
Cygnus X-1 Cygnus x-1.jpg Binary cyg.jpg Cygnus Apparent: 8.95 Absolute: 6.5 ~6070 ly Right Ascension: 19h 58m 21.70s; Declination: +35° 12' 05.80" Chandra, NASA
Stephen Hawking lost a bet that Cynus X-1 did not contain a black hole; This black hole is 15 times the mass of the sun.
SXP 1062 Sxp1062 x-ray.jpg Sxp 1062.jpg Tucana Apparent: ~180,000 ly Right Ascension: 01h 29m 12.40s; Declination: -73° 32' 01.70" Chandra
There is evidence that there is a pulsar within this supernova remnant.
Messier Object M1 (Crab Nebula) Crab nebula m1.jpg NASA m1.jpg Taurus Apparent: 8.4 ~6,500 ly Right Ascension: 05h 34m 32s; Declination: +22° 0.0' 52.00" Chandra, NASA
First observed in A.D. 1054, the Crab Nebula produces the equivalent of 100,000 suns in Energy and has a pulsar located in its center as well.
V838 Monocerotis V838 Mon NASA.jpg V838 Monocerotis.jpg Monoceros Apparent: 15.74 ~20,000 ly Right Ascension: 07h 04m 04.85s ; Declination: -03° 50' 50.1" NASA, NASA, Wikipedia
This object became 600,000 times more luminous than our Sun, for an instant, the brightest star in this galaxy, in January of 2002.
Delta Cep (Cephei) Deltacep.jpg Delta Cephei.jpg Cepheus Apparent: 3.5-4.4 887 ly Right Ascension: 22h 29m 10.26502s; Declination: +58° 24' 54.7139" AAVSO, Wikipedia
Delta Cep is located in a binary system, and is one of the closest Cepheid variable stars, with only Polaris being closer.
Alpha Orionis (Betelgeuse) Betelgeuse1.jpg Betelgeuse2.png Orion Apparent: 0.2-1.2 ~643 ly Right Ascension: 05h 55m 10.3053s; Declination: +07° 24' 25.426" AAVSO, Wikipedia
It will explode as a type II supernova within the next million years.
SN 2010JL SN2010JL1.jpg SN2010JL2.jpg Leo Apparent: ~160 million ly Right Ascension: 09h 42m 53.33s; Declination: +09° 29' 41.80" Chandra
It is the first evidence in X-rays of a supernova shock wave breaking through a cocoon of gas around the star. This discovery may help explain why some supernova explosions are more powerful than others.
NGC 3582 NGC3582-1.jpg NGC3582-2.jpg Carina Apparent: ~6000 ly Right Ascension: 11h 12m 12s; Declination: -61° 16′ 25" NASA APOD
A complex nebula where bright stars and interesting molecules are forming.
LHa115-N19 LHa115-N19-1.jpg LHa115-N19-2.jpg Tucana Apparent: ~196,000 ly Right Ascension: 0h 47m 31s; Declination: -73° 8.3' Chandra
This area is filled with ionized hydrogen gas and it is where many massive stars are expelling dust and gas through stellar winds.
Antares Antares-1.png Antares-2.jpg Scorpius Apparent: 0.96 ~550 ly Right Ascension: 16h 29m 24.45970s; Declination: -26° 25' 55.2094 Wikipedia
A red supergiant star in the Milky Way galaxy and the sixteenth brightest star in the nighttime sky.
Rho Ophiuchi Cloud complex Rhoophiuchicloud-1.jpg Rhoophiuchicloud-2.jpg Ophiuchus Apparent: ~460 ly Right Ascension: 16h 28m 06s; Declination: -24° 32.5′ Wikipedia, NASA APOD
One of the closest star-forming regions.
IC 1396 IC1396-1.jpg IC1396-2.jpg Cepheus Apparent: ~2,400 ly Right Ascension: 21h 38m 8.7s; Declination: +57° 26' 48" Wikipedia
One of the largest emission nebulae in the night sky. It contains "the Elephant's Trunk", a dark, dense globule in the nebula.

</spoiler>

<spoiler text="2012 DSOs">

2012 DSO's
Name Images Constellation Magnitude Distance Coordinates External Links
Mira (Omicron Ceti) Star mira full.jpg Mira illustration.jpg Cetus Apparent: 2.0 to 10.1 ~420 ly Right Ascension: 02h 19m 20.70s; Declination: -02° 58' 39.51" Chandra NASA Science News
Mira is the prototype for Mira variables, which are red giants that oscillate over long periods.
SNR 0509-67.5 SNR0509675.jpg SNR 0509.jpg Dorado ~160,000 ly Right Ascension: 05h 09m 31.7s; Declination: -67° 31' 18.01” NASA APOD Chandra
A supernova remnant in the LMC (Large Magellanic Cloud). The explosion occurred 400 years ago for Earth observers.
CH Cyg CHcyg.jpg Cygnus Apparent: 5.6 to 10.5 ~815 ly Right Ascension: 19h 24m 33.07s; Declination: +50° 14' 29.13" Chandra AAVSO
CH Cyg is a symbiotic star system between a red giant and a white dwarf.
Kepler's SNR (SN 1604) KeplerSNR.jpg Ophiuchus ~13,000 ly Right Ascension: 17h 30m 40.80s; Declination: -21° 29' 11.00" Chandra NASA APOD
A Type 1a supernova remnant that was observed by Johannes Kepler in 1604.
Tycho's SNR (SN 1572) TychoSNR.jpg Cassiopeia ~9000 ly Right Ascension: 00h 25m 17s; Declination: +64° 08' 37" Chandra NASA APOD
A Type 1a supernova remnant that was observed in 1572 and later studied by Tycho Brahe.
Messier 15 (NGC 7078) File:M15.jpg Pegasus Apparent: 6.2 ~33,600 ly Right Ascension: 21h 29m 58.38s; Declination: +12° 10′ 00.6″ Messier Catalogue U of Alabama
M15 is one of the oldest known and closest globular clusters to Earth.
Carina Nebula CarinaNebula.jpg Carinanebula.jpg Carina Apparent: 1.0 ~7500 ly Right Ascension: 10h 45m 04s; Declination: -59° 41' 03" Chandra Universe Today
The Carina Nebula is a very bright and large nebula. It contains Eta Carinae, which is one of the largest known stars and a prime candidate for a hypernova.
T Tauri TTauri.jpg T Tauri 2MASS.jpg Taurus Apparent: 9.3-14 462 ly Right Ascension: 04h 21m 59.43s; Declination: +19° 32′ 06.42″ NASA APOD Universe Today
T Tauri is the prototype for T Tauri stars, which are the stars in the life stage between protostar and main sequence. there is a nebula located close to the star called Hind's Variable Nebula, which changes in luminosity as T Tauri varies.
Sirius B SirB.jpg Canis Major Apparent: 8.30; Absolute: 11.18 8.6 ly Right Ascension: 06h 45m 11s; Declination: -16° 42' 05.00" Chandra NASA APOD
Sirius B is the smaller, white dwarf component to the Sirius star system.
RR Lyrae RRL.jpg RRlyrae.gif Lyra Apparent: 7.1 to 8.2 ~850 ly Right Ascension: 19h 25m 27.91s; Declination: +42° 47′ 03.69″ AAVSO Encyclopedia of Science
RR Lyrae is the prototype for RR Lyrae variables, which are low-mass stars that pulsate regularly.
U Scorpii UScorpii.jpg Usco.png Scorpius Apparent: 8.7 to 19.3 >15000 ly Right Ascension: 16h 22m 30.78s; Declination: -17° 52′ 42.8″ Universe Today Sky and Telescope
U Scorpii is a recurrent nova, and one of ten known recurrent novae in the Milky Way. Its most recent outburst was in January 2010, and it was the best-observed outburst in history.
Rosette Nebula (Caldwell 49, 3C 163) Rosette.jpg Rosette Nebula.jpg Monoceros Apparent: 9.0 4700 ly Right Ascension: 06h 31m 52.00s; Declination: +04° 55' 57.00" Atlas of the Universe Chandra
A large stellar nursery that produces several O and B type stars. It has an appearance similar to a rose, hence its name.
BP Psc BPP.jpg Pisces Apparent: 11.9 ~1000 ly Right Ascension: 22h 22m 24.70s; Declination: -02° 13' 41.40" Chandra NASA NGC 2440 PDF
BP Psc appears to be a red giant, but it has an accretion disc similar to that of a protostar. This has led to hypotheses that BP Psc has recently consumed a companion star or a large, gaseous planet.
NGC 2440 (VV 45) NCG2440.jpg Ngc2440.jpg Puppis Apparent: 11.5 ~4000 ly Right Ascension: 07h 41m 54.91s; Declination: -18° 12′ 29.7″ NASA APOD Hubble
NGC 2440 is a planetary nebula whose star of origin is now an extremely hot white dwarf.
RX J0806.3+1527 (HM Cnc) RXstar.jpg Cancer Apparent: 21.1 ~1600 ly Right Ascension: 08h 06m 23.20s; Declination: +15° 27' 30.20" Chandra Space.com
An x-ray binary system composed of two white dwarves that are rapidly orbiting each other. Their orbits are slowly getting closer, and the stars will eventually collide. Since they are faint, they are being observed by x-ray emissions.
DEM L238 & L249 DEMsnrs.jpg Deml238 l249.jpg Dorado ~160,000 ly Right Ascension: 05h 34m 08.80s; Declination: -70º 34' 28.00" Chandra Space Daily
Two remnants from neighboring stars that exploded as white dwarves in the LMC.

</spoiler>

<spoiler text="2011 DSOs">

2011 DSO's
Name Images Constellation Magnitude Distance Coordinates External Links
Epsilon Aurigae Epsilon aurigae.jpg Epsilon Auriga.jpg Auriga Apparent: 2.9 normally, 3.8 during eclipse; Absolute: -6.0 ~2000 light years (ly) Right Ascension: 05h 01m 58.1s; Declination: +43° 49’ 24” AAVSO: Epsilon Aurigae Citizen Sky: Epsilon Aurigae
Epsilon Aurigae is an eclipsing binary. One part is a white giant, and the other appears to be a star shrouded by a dark cloud of dust. In the middle of this cloud, there is a clearing where the star probably is, so during an eclipse, the system appears momentarily brighter as this clearing passes over the giant. An observation project of Epsilon Aurigae took place from 2009-2011.
NGC 6240 (IC 4625, UGC 10592, PGC 59186, VV 617) Ngc 6240.jpg Ngc 6240 xray inset.jpg Ophiuchus Apparent: 12.8 ~330 million ly Right Ascension: 16h 52m 58.9s; Declination: +02° 24' 03" Chandra: NGC 6240 NASA APOD: NGC 6240
NGC 6240 is an extremely luminous infrared galaxy (ULIRG). It is the result of two smaller galaxies colliding to form one large galaxy with two nuclei and an irregular shape. Possible hypotheses for the high infrared emission are intense star formation or the presence of one or two AGNs.
3C 321 3C321 wavelengths.jpg 3c321 artist.jpg Serpens ~1.4 billion ly Right Ascension: 15h 31m 42.7s; Declination:: +24° 04’ 25.00" Chandra: 3C 321 Space.com: 3C 321
3C 321 is a binary system of galaxies. One of the galaxies is directing a large jet of energy at its companion. It is nicknamed the “Death Star Galaxy” and it is theorized that the galaxy with the jet contains a supermassive black hole. It was discovered in 2007.
Centaurus A (NGC 5128, Arp 153, PGC 46957, Caldwell 77, 4U 1322-42) Centaurus Apparent: 6.84 ~15 million ly Right Ascension: 13h 25m 27.6s; Declination: -43° 01’ 09” SEDS: Centaurus A Solstation.com: Centaurus A
Cen A is one of the closest radio galaxies containing an AGN to Earth. It is the fifth brightest galaxy in the sky, although it is mostly only observable from the Southern Hemisphere. It is slowly consuming another spiral galaxy, causing rapid star formation, helping the radiation coming from the nucleus. The supermassive black hole at the center sends out jets of X-rays and radio waves in which the inner parts are moving at one half of the speed of light.
Stephan's Quintet (HGC 92, Arp 319, VV 288) Pegasus Apparent: 13.9 300-370 million ly Right Ascension: 22h 35m 57.5s; Declination: +33° 57’ 36” Chandra: Stephan's Quintet NASA APOD: Stephen's Quintet
Stephan's Quintet is a visual grouping of five galaxies. Four of the galaxies are in a compact group, and collisions have altered the form of the galaxies. Eventually, the four will likely merge into one large galaxy. The collisions have caused emissions of both x-rays and molecular hydrogen. The four than are physically interlocked are NGC 7317, NGC 7318a, NGC 7318b, and NGC 7319. NGC 7320 is not actually part of the interacting cluster but is a foreground object in the same area as the other galaxies. The galaxies NGC 7335, NGC 7336, and NGC 7337 in the NGC 7331 group, or Deer Lick Group, was used to determine this. Occasionally, the tidal forces cause NGC 7318b to emit huge shock waves of X-rays. It is also the brightest member of the group with an apparent magnitude of 13.9. NGC 7319 is classified as a Type 2 Seyfert galaxy.
MACSJ0717.5+3745 Auriga Right Ascension: 07h 17m 31.00s; Declination: +37° 45’ 39.60” Chandra: MACSJ0717.5+3745
MACSJ0717.5+3745 (MACSJ0717 for short) a galaxy cluster where four separate galaxies have been involved in a collision. The collisions are caused by a stream of hot gas known as a filament that pours into the cluster. It is one of the most complex clusters ever studied and was discovered in 2003.
Bullet Cluster (1E 0657-56) Carina Right Ascension: 06h 58m 37.9s; Declination: - 55° 57’ 0” Chandra: Bullet Cluster NASA APOD: Bullet Cluster
The Bullet Cluster is a system of two colliding clusters of galaxies. It is one of the best examples of evidence for the existence of dark matter. In the collision, the stars mostly did not interact, but the gases and other matter were significantly altered. This other matter is hypothesized to be dark matter, and is supported by the supposed Modified Newtonian Dynamics that explains the lensing phenomenon in the cluster. It is one of the hottest known clusters of galaxies.
Perseus A (NGC 1275, PGC 12429, UGC 2669, Caldwell 24, 3C 84, QSO B0316+413) Ngc1275 web.jpg Perseus Apparent: 12.6. Right Ascension: 03h 19m 48.1s; Declination: +41° 30’ 42” NASA APOD: Perseus A Hubble Heritage: Perseus A
Perseus A is a Type 1.5 Seyfert galaxy, which signifies that both broad and narrow lines on the emission spectrum are present, but there are less pronounced broad lines than a Type 1 Seyfert galaxy. It consists of two galaxies, one in the center and another that lies in front of it. Long filaments of gas stretch out from the system.
SN 2006gy Perseus Peak Apparent: 14.2 Right Ascension: 03h 17m 27.10s; Declination: +41° 24’ 19.50” Chandra: SN 2006gy NASA APOD: SN 2006gy
SN 2006gy was an extremely energetic supernova that reached an extremely high luminosity level. The large size of the star caused it to gain energy in its core, eventually causing it to be blown apart violently. This type of supernova is sometimes referred to a hypernova, and it compared to the star Eta Carinae in the Milky Way.
SN 1996cr Circinus Right Ascension: 14h 13m 10.05 s; Declination: -65° 20’ 44.8” Chandra: SN 1996cr
SN 1996cr is a powerful supernova that was noticed in a Chandra image after it was taken, and was widely studied afterward. The star exploded between 1995 and 1996, but was not discovered until 2001. It is of interest because it is located in an active galaxy with a growing supermassive black hole and rapid star formation.
NGC 4603 (PGC 42510) Centaurus Apparent: 12.3 Right Ascension: 12h 40m 55.2s; Declination: -40° 58’ 35” NASA APOD: NGC 4603 HyperPhysics: NGC 4603
NGC 4603 is a large spiral galaxy. It is the most distant galaxy in which Cepheids have been used to determine the distance to the galaxy. Using this distance and determining recession velocity, it has served as a benchmark for determining the Hubble constant (70 km/sec/Mpc ±10%).
NGC 7771 (VV 2002) Pegasus Apparent: 12.9 Right Ascension: 23h 51m 25.0s; Declination: +20° 06’ 49” NASA APOD: NGC 7771
a large spiral galaxy in close proximity to two other galaxies. This trio of galaxies is named the NGC 7771 group after its largest member, a spiral, the three galaxies, NGC 7769-7771, have passed by each other closely and will eventually form one huge galaxy. It is considered an accurate representation of the formation of the Milky Way. Dusty nebulae in front of the group obstruct clear viewing.
NGC 2623 (Arp 243) Cancer Apparent: 13.9 Right Ascension: 08h 38m 24.1s; Declination: +25° 45’ 01” NASA APOD: NGC 2623 Hubble: NGC 2623
a system of two or more interacting galaxies. The galaxies have formed one common nucleus, but there are two strands of stars branching out from the galaxy, indicating a merger has taken place.
JKCS041 Chandra: JKCS041
Messier 77 (NGC 1068, UGC 2188, PGC 10266, Arp 37, 3C 71) Chandra: Messier 77 Universe Today: Messier 77
H2356-309 Chandra: H2356-309

</spoiler>

  • Basic note sheet for the 2011 DSOs, intended for use when asked to quickly identify things, or for those new to the event.

<spoiler text="2010 DSOs">

-**is part of a special viewing campaign this year and will be included up to at least 2011. </spoiler> <spoiler text="2009 DSOs">

-*is part of a special viewing campaign this year and will be included up to at least 2011. </spoiler>

See Also

Astronomy
Astronomy/Stellar Evolution
Astronomy/Variable Stars
Astronomy/Star and Planet Formation
Astronomy/Type_Ia_Supernovae

Links

Basic note sheet for the 2010-2011 DSOs
SIMBAD Astronomy Database for DSOs