List of novae in 2019

The following is a list of all novae that are known to have occurred in 2019. A nova is an energetic astronomical event caused by a white dwarf accreting matter from a star it is orbiting (typically a red giant, whose outer layers are more weakly attached than smaller, denser stars) Alternatively, novae can be caused by a pair of stars merging with each other, however such events are vastly less common than novae caused by white dwarfs.

Host galaxies of novae discovered in 2018

Milky Way: 16 (51.6%)Andromeda Galaxy: 11 (35.5%)Messier 81: 2 (6.5%)Triangulum Galaxy: 1 (3.2%)Whirlpool Galaxy: 1 (3.2%)

  •   Milky Way: 16 (51.6%)
  •   Andromeda Galaxy: 11 (35.5%)
  •   Messier 81: 2 (6.5%)
  •   Triangulum Galaxy: 1 (3.2%)
  •   Whirlpool Galaxy: 1 (3.2%)

In 2019, at least sixteen Milky Way novae were discovered, eight of which were dwarf nova eruptions, one of the variable system V386 Serpentis, one from the known nova-like system 2E 1516.6-6827, and four from previously unidentified white dwarf binaries. One of these binaries, TCP J18200437-1033071, may have possibly been involved in another outburst in 1951. The recurrent nova V3890 Sgr, which had been seen to erupt in 1962 and 1990, also erupted again in 2019.

The sky locations of the known galactic novae in 2019. Red dots are classical novae, orange dots are dwarf novae, yellow dots are luminous red novae, and blue dots are recurring novae.

List of novae in 2019

In the Milky Way
Nova name Discovery date Constellation Right ascension Declination Peak Brightness (v)[1] Distance
(light years)[2]		 Absolute
magnitude (v)		 Nova type Origin system
identified?		 Companion star
spectral type[note 1]
V386 Serpentis[3] 2019/01/18 Serpens 16h 10m 33.63s −01° 02′ 23.2″ 10.4 785+77
−64		 3.5+0.2
−0.2		 Dwarf nova Yes White dwarf
TCP J06373299-0935420 2019/02/21 Monoceros 06h 37m 33.01s −09° 35′ 42.2″ 10.4 1200+230
−170		 2.6+0.3
−0.4		 Dwarf nova Yes White dwarf
TCP J05390410+4748030 2019/03/14 Auriga 05h 39m 04.09s 47° 48′ 00.9″ 11.3 1060+220
−150		 3.7+0.4
−0.4		 Dwarf nova Yes White dwarf
TCP J05515391+6504346 2019/04/01 Camelopardalis 05h 51m 53.87s 65° 04′ 36.9″ 13.2 3000+20000
−1600		 3.3+1.6
−4.3		 Dwarf nova Yes White dwarf
TCP J18325790-1642211 2019/04/02 Sagittarius 18h 32m 58.30s −16° 42′ 17.6″ 12.5 99999+70000
−99999		 −4.9+2.6
−1.5		 Classical Yes K5III
TCP J18200437-1033071 2019/04/08 Serpens 18h 20m 04.21s −10° 33′ 08.7″ 13.3 10000+5000
−5000		 0.9+1.5
−0.9		 Dwarf nova Yes White dwarf
PNV J15212688-6838261 2019/05/11 Triangulum Australe 15h 21m 26.84s −68° 38′ 26.6″ 13.6 3250+420
−330		 3.6+0.2
−0.3		 Dwarf nova Yes K?V
AT 2019fez 2019/05/13 Scorpius 17h 07m 34.19s −36° 08′ 21.3″ 13.1 ? ? Classical No ?
TCP J10240289+4808512 2019/05/25 Ursa Major 10h 24m 02.70s 48° 08′ 51.0″ 11.8 1090+380
−300		 4.2+0.2
−0.3		 Dwarf nova Yes White dwarf
V2860 Ori 2019/08/07 Orion 06h 09m 57.45s 12° 12′ 25.2″ 9.4 ? ? Classical ? ?
V569 Vul 2019/08/18 Vulpecula 19h 52m 08.25s 27° 42′ 20.9″ 13.3 ? ? Classical ? ?
V3890 Sgr 2019/08/27 Sagittarius 18h 30m 43.29s −24° 01′ 08.9″ 7.1 ? ? Recurrent Yes Red Giant
Gaia19edn 2019/09/14 Ophiuchus 17h 38m 31.82s −29° 03′ 47.1″ 12.3 ? ? Classical ? ?
V1707 Sco 2019/09/15 Scorpius 17h 37m 09.54s −35° 10′ 23.2″ 11.7 ? ? Classical ? ?
V2891 Cyg 2019/09/17 Cygnus 21h 09m 25.53s 48° 10′ 52.2″ 14.3 ? ? Classical Yes ?
V659 Sct 2019/10/29 Scutum 18h 39m 59.70s −10° 25′ 41.9″ 8.36 ? ? Classical ? ?

In the Andromeda Galaxy

Novae are also frequently spotted in the Andromeda Galaxy, and are even slightly more commonly found than in the Milky Way, as there is less intervening dust to prevent their detection. Furthermore, Andromeda is circumpolar for observers north of latitude +48-50, roughly the latitude of the Canadian-American border, allowing observers north of that to search for transients all year.

In 2019, 11 novae have been seen in the Andromeda galaxy.

Nova name Discovery date Right ascension Declination Peak
brightness (v)[1]		 Absolute
magnitude (v)
PNV J00420290+4107142 2019/01/20 00h 42m 02.90s 41° 07′ 14.2″ 18.2 -6.3
PNV J00424503+4114248 2019/01/21 00h 42m 45.03s 41° 14′ 24.8″ 18.0 -6.5
PNV J00430008+4118340 2019/01/23 00h 43m 00.08s 41° 18′ 34.0″ 19.5 -5.0
PNV J00422916+4114013 2019/01/27 00h 42m 29.16s 41° 14′ 01.3″ 19.6 -4.9
PNV J00435457+4117330 2019/01/28 00h 43m 54.57s 41° 17′ 33.0″ 17.5 -7.0
PNV J00425100+4121038 2019/02/03 00h 42m 51.00s 41° 21′ 03.8″ 18.8 -5.7
PNV J00421999+4113225 2019/03/13 00h 42m 19.99s 41° 13′ 22.5″ 18.8 -5.7
PNV J00423396+4113577 2019/04/16 00h 42m 33.96s 41° 13′ 57.7″ 17.3 -7.2
PNV J00424174+4116263 2019/04/26 00h 42m 41.74s 41° 16′ 26.3″ 16.6 -7.9
PNV J00422198+4123584 2019/05/24 00h 42m 21.98s 41° 23′ 58.4″ 16.7 -7.8
PNV J00432058+4125426 2019/05/28 00h 43m 20.58s 41° 25′ 42.6″ 17.4 -7.1

In other galaxies

Any galaxy within 20 million light-years of the Sun could theoretically have nova events bright enough to be detected from Earth, although in practice most are only detected in galaxies within 10-15 million light-years of the Milky Way, such as the Triangulum Galaxy, Messier 81, Messier 82, Messier 83, and Messier 94.

In 2019, two novae were observed in Messier 81, and another in the Triangulum Galaxy. A luminous red nova was observed in the Whirlpool Galaxy (Messier 51a), probably caused by a merger of two stars.

Nova name Discovery date Host galaxy Right ascension Declination Peak
brightness (v)[1]		 Distance
(million light-years)		 Absolute
magnitude (v)		 Type
AT 2019gc 2019/01/06 Triangulum Galaxy 01h 33m 56.94s 30° 32′ 32.6″ 17.0 2.65 -7.5 Classical
AT 2019abn 2019/01/22 Whirlpool Galaxy 13h 29m 42.39s 47° 11′ 16.9″ 16.9 23 -12.3 Luminous Red Nova
PNV J09555100+6902323 2019/04/14 Messier 81 09h 55m 51.00s 69° 02′ 32.3″ 19.8 11.5 -7.9 Classical
PNV J09554664+6902473 2019/06/09 Messier 81 09h 55m 46.64s 69° 02′ 47.3″ 19.1 11.5 -8.6 Classical

See also

Notes
  1. In most cases, the spectral type is estimated based on the absolute magnitude

References
  1. Mukai, Koji. "Recent Novae". asd.gsfc.nasa.gov. Retrieved 25 January 2019.
  2. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  3. "CBET 4603 : 20190120 : V386 SERPENTIS = TCP J16103359-0102227". Central Bureau for Astronomical Telegrams. IAU. Retrieved 25 January 2019.
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