List of supernova candidates

This is a list of supernova candidates, or stars that astronomers have suggested are supernova progenitors. Type II supernova progenitors include stars with at least 10 solar masses that are in the final stages of their evolution. Prominent examples of stars in this mass range include Antares, Spica,[1] Gamma Velorum,[2] Mu Cephei, and members of the Quintuplet Cluster.[3] Type Ia supernova progenitors are white dwarf stars that are close to the Chandrasekhar limit of about 1.44 solar masses and are accreting matter from a binary companion star. The list includes massive Wolf–Rayet stars, which may become Type Ib/Ic supernovae.

This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.
Supernova progenitor candidates
Identifier Epoch J2000 Constellation Distance
(light years)		 Spectral
class		 Possible supernova

type

 Notes
R. A. Dec.
IK Pegasi 21h 26m 26.7s+19° 22′ 32″ Pegasus 154.4±1.0[4]A8m:/DA Ia [5][6][7]
Spica 13h 25m 11.6s−11° 09′ 40.8″ Virgo 250+14
−13[8]		B1 [7]
Alpha Lupi 14h 41m 55.8s–47° 23′ 17″ Lupus 465+12
−11[8]		B1.5 II [9][7]
Antares 16h 29m 24.5s–26° 25′ 55″ Scorpius 554+113
−80[8]		M1.5Iab-b IIP [10][7]
Betelgeuse 05h 55m 10.3s+07° 24′ 25″ Orion 720+160
−110[11]		M2Iab IIP [1][12][7]
Rigel 05h 14m 32.3s–08° 12′ 06″ Orion 1118+30
−28[4]		B8Ia IIn(pec?) [13][7]
Gamma2 Velorum 08h 09m 32.0s−47° 20′ 12″ Vela 1120+130
−100[8]		WC8 Ib/Ic [14]
T Coronae Borealis 15h 59m 30.2s+25° 55′ 13″ Corona Borealis 2690+110
−100[4]		M3III/D Ia [15]
KPD 1930+2752 19h 32m 14.9s+27° 58′ 35″ Cygnus 2860+130
−120[4]		 sdB/D Ia [nb 1][16][17]
Rho Cassiopeiae 23h 54m 23.0s+57° 29′ 58″ Cassiopeia 3440+930
−610[4]		G2Ia0e IIL [18]
VY Canis Majoris 07h 22m 58.3s−25° 46′ 03″ Canis Major 3930+420
−350[19]		M5eIa II [12][20]
IRAS 17163-3907 17h 19m 49.3s−39° 10′ 37.9″ Scorpius 3930+990
−660[4]		late B/early A II [21]
HD 168625 18h 21m 19.5s−16° 22′ 26″ Sagittarius 5250+600
−490[4]		B6Ia II [22]
NML Cygni 20h 46m 25.6s+40° 06′ 59.4″ Cygnus 5250+420
−360[23]		M6I II [24]
IRC +10420 19h 26m 48.1s+11° 21′ 17″ Aquila 5600+2200
−1200[4]		F8Ia+ IIb [25][26]
Mu Cephei 21h 43m 30.5s+58° 46′ 48″ Cepheus 5900+3400
−1600[8]		M2Ia IIn/IIb [27]
RS Ophiuchi 17h 50m 13.2s–06° 42′ 28″ Ophiuchus 7380+1000
−790[4]		M2III/D Ia [28][29]
Eta Carinae 10h 45m 03.6s−59° 41′ 04″ Carina 8630+69
−68[4]		LBV/O Ib [30][31]
HD 179821 19h 13m 58.6s+00° 07′ 32″ Aquila 10500+2100
−1500[4]		G5Ia IIL [32][33]
T Pyxidis 09h 04m 41.5s −32° 22′ 48″ Pyxis 10700+1700
−1300[4]		 Ia [34][35]
WR 104 18h 02m 04.1s–23° 37′ 41″ Sagittarius 13400+9200
−3900[4]		WC9d/OB Ib/Ic with Grb? [36][37]
V445 Puppis 07h 37m 56.9s–25° 56′ 59″ Puppis 16000+5200
−4600[38]		 Ia [39]
U Scorpii 16h 22m 30.7s–17° 52′ 42″ Scorpius 64000+68000
−17000[40]		 Ia [41]
Sher 25 11h 15m 07.8s−61° 15′ 17″ Carina 43500+5200
−4200[4]		B1.5Iab [42]

Notes
  1. The Kitt Peak Downes star.

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