NGC 6984
| NGC 6984 | |
|---|---|
 NGC 6984 taken by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Right ascension | 20h 57m 53.987s[1] |
| Declination | −51° 52′ 15.13″[1] |
| Redshift | 0.015386[1] |
| Heliocentric radial velocity | 4577 km/s[1] |
| Distance | 180 million ly[2] |
| Apparent magnitude (V) | 12.65[1] |
| Apparent magnitude (B) | 13.19[1] |
| Characteristics | |
| Apparent size (V) | 1.403 x 1.038 arcmin[1] |
| Other designations | |
| ESO-LV 235-0200, 2MASX J20575398-5152151, [CHM2007] LDC 1431 J205753.98-5152151, AM 2054-520, IRAS 20543-5203, PSCz Q20543-5203 [SLK2004] 1671, APMBGC 235+046+104, IRAS F20543-5203, QDOT B2054196-520349, 6dFGS gJ205754.0-515215, ISOSS J20578-5152, SGC 205419-5203.8, ESO 235-20, LEDA 65798, [CHM2007] HDC 1131 J205753.98-5152151 | |
NGC 6984 is a barred spiral galaxy located 180 million light years away in the constellation Indus.
It is known for having been the host of two recent supernovae: one in 2012 first known as SNhunt142[3] (later designated SN 2012im[4]), and one in 2013 known as SN 2013ek. The first was a Type Ic[5] and the second was a Type Ib/c.[6] HST observations were initiated by Dr. Dan Milisavljevic.[7] NASA's press release about SN 2013ek said:
"It is so close to where SN 2012im was spotted that the two events are thought to be linked; the chance of two completely independent supernovae so close together and of the same class exploding within one year of one another is a very unlikely event. It was initially suggested that SN 2013ek may in fact be SN 2012im flaring up again, but further observations support the idea that they are separate supernovae — although they may be closely related in some as-yet-unknown way."[8]
References
- ^ a b c d e f g "Search Results for NGC 6984". Astronomical Database. SIMBAD. Retrieved 5 November 2013.
- ^ "Stellar explosions in NGC 6984". ESA/Hubble Picture of the Week. Retrieved 5 November 2013.
- ^ http://www.astronomerstelegram.org/?read=4300
- ^ http://www.cbat.eps.harvard.edu/iau/cbet/003600/CBET003607.txt
- ^ http://www.astronomerstelegram.org/?read=5225
- ^ http://www.astronomerstelegram.org/?read=5227
- ^ http://www.stsci.edu/cgi-bin/get-proposal-info?id=13505&observatory=HST
- ^ Hubble Catches Stellar Explosions in NGC 6984, NASA, 13 November 2013, archived from the original on 21 November 2013
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