Much of this data comes from CBET Circulars and occasionally more data will be provided on IAU's Astronomical Headlines page. CBET now has an M31 novae page, M33 novae page, and an M81 novae page.   An archive of the updates to this page is available.

CBET has a naming convention now for novae in M31 (now extended to Novae in M33 and M81).   This convention is YYYY-MMa, where YYYY is the year and MM is the 2-digit month of discovery, and 'a' is a lower-case letter (a, b, c, etc.) representing the order of discovery within that month.   Novae in the Magellanic clouds are named with the year followed by a number.   Also, see W. Pietsch's M31 (apparent) optical nova catalogue, M33 novae catalog, and M81 novae catalog Please note that I do not keep track of galactic novae.  

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AT2022usu (= XM83MZ), TNS discovered 2022/09/17.907 by Xingming Observatory Sky Survey (XOSS)
Found in M81 at R.A. = 09h55m08s.140, Decl. = +69°04'22".20
Located 0".0 east and 0".0 north of the center of M81
Mag 20.1:9/17, Type unknown

Nova M31 2022-09a? (= PNV J00425234+4116130) (= M31N 1926-07c), CBAT TOCP discovered 2022/09/08.205 by Jingyuan Zhao; K. Hornoch et al.
Found in M31 at R.A. = 00h42m52s.340, Decl. = +41°16'13".00
Located 90".8 east and 4".7 north of the center of M31 (Jinqyuan Zhao discovery image) (Jordi Camarasa image) (Hornoch discovery image)
Mag 18.6:9/20 (17.3:9/8), Type unknown (Note: recurrent Nova) (References: ATEL 15599, ATEL 15608, ATEL 15609)

AT2022sot (= XM81MZ), TNS discovered 2022/08/29.731 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m10s.430, Decl. = +40°41'23".50
Located 0".0 east and 0".0 north of the center of M31 (Discovery image)
Mag 20.8:8/29, Type unknown

AT2022saq (= XM79MZ) (= PNV J00424143+4115449), TNS discovered 2022/08/23.800 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m41s.430, Decl. = +41°15'44".90
Located 33".0 west and 24".0 south of the center of M31 (Discovery image)
Mag 18.2:8/23, Type unknown (References: CBAT TOCP)

AT2022qzf (= Romanov N3) (= PNV J00420940+4115311) (= M31N 2022-08c) (= ZTF22aazmooy), TNS discovered 2022/08/09.304 by Filipp Romanov
Found in M31 at R.A. = 00h42m09s.400, Decl. = +41°15'31".10
Located 393".6 west and 37".6 south of the center of M31 (Hornoch discovery image) (Filipp Romanov discovery) (Filipp Romanov image)
Mag 19.5:8/22 (17.0:8/10), Type EGN (References: ATEL 15546, CBAT TOCP, ZTF observations)

AT2022qug (= Romanov N2) (= PNV J00424712+4117103), TNS discovered 2022/08/07.284 by Filipp Romanov
Found in M31 at R.A. = 00h42m47s.120, Decl. = +41°17'10".30
Located 0".0 east and 0".0 north of the center of M31 (Hornoch discovery image) (Filipp Romanov discovery) (Filipp Romanov image) (Kamagaya image)
Mag 17.1:8/7, Type EGN (Refereneces: ATEL 15543, CBAT TOCP)

AT2022qpg (= PNV J00442079+4123111) (= M31N 2005-10a) (= ZTF22aazdzyj), TNS discovered 2022/08/04.954 by Italian Supernovae Search Project
Found in M31 at R.A. = 00h44m20s.790, Decl. = +41°23'11".10
Located 31".5 east and 61".8 north of the center of M31 (UofT image) (Carlos Segarra image) (Rafa Ferrando image) (Claudio Balcon image) (Hornoch images) (Carlos Segarra image)
Mag 20.0:8/28 (16.5:8/6), Type EGN (Note: recurrent nova) (ASASSN light curve) (Claudio Balcon Spectrum) (References: ATEL 15545, ATEL 15558, CBAT TOCP, ZTF observations, AAVSO observations; Nova M31N 2005-10a)

AT2022puk (= XM77MZ) (= PNV J00425697+4116333) (= M31N 2022-07e), TNS discovered 2022/07/26.860 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m56s.970, Decl. = +41°16'33".30
Located 142".6 east and 24".8 north of the center of M31 (Sofia image) (Horhoch discoveyr image)
Mag 18.0:7/27, Type unknown (References: ATEL 15532, 15537, 15529, CBAT TOCP)

AT2022ouu (= Romanov N1) (= PNV J00423928+4115169), TNS discovered 2022/07/14.212 by Filipp Romanov
Found in M31 at R.A. = 00h42m39s.280, Decl. = +41°15'16".90
Located 56".9 west and 51".6 south of the center of M31 (Hornoch image) (Filipp Romanov image) (Filipp Romanov image)
Mag 17.1:8/21 (16.4:7/20), Type EGN (Romanov light curve) (Romanov light spectrum) (References: ATEL 15520, ATEL 15516, ATEL 15569, CBAT TOCP)

AT2022oyb (= PNV J00422940+4115430) (= Nova M31 2022-07c?) (= ZTF22aatixbc), TNS discovered 2022/07/12.937 by Kamil Hornoch et al.
Found in M31 at R.A. = 00h42m29s.417, Decl. = +41°15'43".23
Located 168".3 west and 25".5 south of the center of M31 (Discovery image)
Mag 19.0:8/10 (16.5:7/19), Type EGN (References: ATEL 15523, ATEL 15520, ATEL 15512, CBAT TOCP, ZTF observations, Antares light curve)

Nova M31 2022-07a? (= PNV J00445106+4146265), CBAT TOCP discovered 2022/07/04.713 by Koichi Itagaki
Found in M31 at R.A. = 00h44m51s.060, Decl. = +41°46'26".50
Located 1418".0 east and 1818".0 north of the center of M31 (Discovery image) (Julio Vannini image Twitter)
Mag 17.8:7/4, Type unknown

AT2022npa (= XM74MZ) (= PNV J00425478+4115086) (= Gaia22dcs), TNS discovered 2022/06/25.858 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m54s.811, Decl. = +41°15'08".24
Located 117".9 east and 59".9 south of the center of M31 (Discovery image)
Mag 17.6:7/27, Type unknown (References: ATEL 15497, CBAT TOCP, Gaia observations)

AT2022nci (= PSP22Y) (= PNV J00463343+4145355) (= Gaia22crg), TNS discovered 2022/06/20.862 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h46m33s.418, Decl. = +41°45'35".10
Located 2583".0 east and 1768".0 north of the center of M31 (Discovery image)
Mag 19.5:7/26 (17.4:6/25), Type unknown (References: CBAT TOCP, Gaia observations)

Nova M31 2008-12a (= PTF09hsd) (= Nova M31 2011-10e?) (= TCP J00452884+4154095) (= Nova M31 2012-10a?), (= PNV J00452885+4154094), (= Nova M31 2011-10e?) (= PNV J00452888+4154097) ATEL 5607, discovered 2008/12/26.481 by Koichi Nishiyama and Fujio Kabashima
Found in M31 at R.A. = 00h45m28s.80, Decl. = +41°54'10".1
Located 1845".9 east and 2280".9 north of the center of NGC 224 (= M31) (Discovery image)
Mag > 22.3:11/21/2021 (15.91:10/2/2014), Type FeII (Note: recurrent nova) (References: See subpage)
Nova M31 2008-12a images subpage

archive.gif For Novae which have faded below 18th magnitude, you will have to look in the archives
Current supernovae
Other Supernovae from 2021 Other Extragalactic Novae from 2021 Unconfirmed objects from 2021
Other Supernovae from 2020 Other Extragalactic Novae from 2020 Unconfirmed objects from 2020
Supernovae from 2019 Extragalactic Novae from 2019 Unconfirmed objects from 2019

For more information in Extra galactic novae, look at the Extra Galactic Nova links on the links page.   Look at the updates page for a list of the most recent changes and additions to these pages.

Please send feedback to David Bishop dbishopx@gmail.com