Astronomy:List of novae in 2019

	Host galaxies of novae discovered in 2018
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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.

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.

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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	16^h 10^m 33.63^s	−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	06^h 37^m 33.01^s	−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	05^h 39^m 04.09^s	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	05^h 51^m 53.87^s	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	18^h 32^m 58.30^s	−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	18^h 20^m 04.21^s	−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	15^h 21^m 26.84^s	−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	17^h 07^m 34.19^s	−36° 08′ 21.3″	13.1	?	?	Classical	No	?
TCP J10240289+4808512	2019/05/25	Ursa Major	10^h 24^m 02.70^s	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	06^h 09^m 57.45^s	12° 12′ 25.2″	9.4	?	?	Classical	?	?
V569 Vul	2019/08/18	Vulpecula	19^h 52^m 08.25^s	27° 42′ 20.9″	13.3	?	?	Classical	?	?
V3890 Sgr	2019/08/27	Sagittarius	18^h 30^m 43.29^s	−24° 01′ 08.9″	7.1	?	?	Recurrent	Yes	Red Giant
Gaia19edn	2019/09/14	Ophiuchus	17^h 38^m 31.82^s	−29° 03′ 47.1″	12.3	?	?	Classical	?	?
V1707 Sco	2019/09/15	Scorpius	17^h 37^m 09.54^s	−35° 10′ 23.2″	11.7	?	?	Classical	?	?
V2891 Cyg	2019/09/17	Cygnus	21^h 09^m 25.53^s	48° 10′ 52.2″	14.3	?	?	Classical	Yes	?
V659 Sct	2019/10/29	Scutum	18^h 39^m 59.70^s	−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	00^h 42^m 02.90^s	41° 07′ 14.2″	18.2	-6.3
PNV J00424503+4114248	2019/01/21	00^h 42^m 45.03^s	41° 14′ 24.8″	18.0	-6.5
PNV J00430008+4118340	2019/01/23	00^h 43^m 00.08^s	41° 18′ 34.0″	19.5	-5.0
PNV J00422916+4114013	2019/01/27	00^h 42^m 29.16^s	41° 14′ 01.3″	19.6	-4.9
PNV J00435457+4117330	2019/01/28	00^h 43^m 54.57^s	41° 17′ 33.0″	17.5	-7.0
PNV J00425100+4121038	2019/02/03	00^h 42^m 51.00^s	41° 21′ 03.8″	18.8	-5.7
PNV J00421999+4113225	2019/03/13	00^h 42^m 19.99^s	41° 13′ 22.5″	18.8	-5.7
PNV J00423396+4113577	2019/04/16	00^h 42^m 33.96^s	41° 13′ 57.7″	17.3	-7.2
PNV J00424174+4116263	2019/04/26	00^h 42^m 41.74^s	41° 16′ 26.3″	16.6	-7.9
PNV J00422198+4123584	2019/05/24	00^h 42^m 21.98^s	41° 23′ 58.4″	16.7	-7.8
PNV J00432058+4125426	2019/05/28	00^h 43^m 20.58^s	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	01^h 33^m 56.94^s	30° 32′ 32.6″	17.0	2.65	-7.5	Classical
AT 2019abn	2019/01/22	Whirlpool Galaxy	13^h 29^m 42.39^s	47° 11′ 16.9″	16.9	23	-12.3	Luminous Red Nova
PNV J09555100+6902323	2019/04/14	Messier 81	09^h 55^m 51.00^s	69° 02′ 32.3″	19.8	11.5	-7.9	Classical
PNV J09554664+6902473	2019/06/09	Messier 81	09^h 55^m 46.64^s	69° 02′ 47.3″	19.1	11.5	-8.6	Classical

Notes

↑ In most cases, the spectral type is estimated based on the absolute magnitude

References

↑ ^1.0 ^1.1 ^1.2 Mukai, Koji. "Recent Novae". https://asd.gsfc.nasa.gov/Koji.Mukai/novae/novae.html. Retrieved 25 January 2019.
↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
↑ "CBET 4603 : 20190120 : V386 SERPENTIS = TCP J16103359-0102227". IAU. http://www.cbat.eps.harvard.edu/cbet/004600/CBET004603.txt. Retrieved 25 January 2019.

External links

List of all galactic novae

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Original source: https://en.wikipedia.org/wiki/List of novae in 2019. Read more

[3] In most cases, the spectral type is estimated based on the absolute magnitude

[novaelist-1] 1.0 ^1.1 ^1.2 Mukai, Koji. "Recent Novae". https://asd.gsfc.nasa.gov/Koji.Mukai/novae/novae.html. Retrieved 25 January 2019.

[gaiaDR2-2] Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.

[JanSerpentis-4] "CBET 4603 : 20190120 : V386 SERPENTIS = TCP J16103359-0102227". IAU. http://www.cbat.eps.harvard.edu/cbet/004600/CBET004603.txt. Retrieved 25 January 2019.

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v t e 2019 in space
« 2018 2020 »
Space probe launches	Beresheet (lunar lander; Feb 2019) Chandrayaan-2 / Vikram / Pragyan (lunar obiter, lander and rover; Jul 2019)
Impact events	Kamchatka meteor (announced) 2019 MO
Selected NEOs	Asteroid close approaches 2016 AZ8 2018 XB4 (12538) 1998 OH 66391 Moshup 1620 Geographos 2100 Ra-Shalom 2006 QV89 2019 SU3 2019 TA7 2019 UN13
Exoplanets	K2-288Bb Wolf 359 b and c Struve 2398 Bb and Bc Luyten's Star d and e L 1159-16 b, c, and d Gliese 687 c AD Leonis b Gliese 251 c LP 816-60 b Gliese 754 b Gliese 588 b and c Gliese 784 b Gliese 555 b Teegarden's Star b and c
Discoveries	2019 AQ3 ASASSN-19bt EPIC 204376071 FarFarOut K2-18b water vapor detected on exoplanet Messier 87 supermassive black hole M87* imaged 2I/Borisov WD 0145+234 detection of exoasteroid disruption WD J0914+1914
Comets	289P/Blanpain 78P/Gehrels 168P/Hergenrother 163P/NEAT 138P/Shoemaker–Levy 171P/Spahr
Space exploration	New Horizons (encounter with 486958 Arrokoth; Dec 2018 / Jan 2019) Chang'e 4 / Yutu-2 (landing on the far side of the Moon; Jan 2019) Hayabusa2 (departure from 162173 Ryugu; Dec 2019)
Category:2018 in space — Category:2019 in space — Category:2020 in space

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