Much of this data comes from TNS, ATEL circulars and CBAT's Transient Objects Confirmation 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.   CBET has an M31 novae page, M33 novae page, and an M81 novae page (last updated in 2011).   Please note that I do not keep track of galactic novae.  

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AT2024epj (= ASASSN-24by), TNS discovered 2024/03/18.080 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in LMC at R.A. = 04h55m03s.766, Decl. = -65°55'57".18
Located 0".0 east and 0".0 north of the center of LMC
Mag 10.2:3/18, Type unknown

AT2024emh (= Gaia24azh), TNS discovered 2024/02/28.023 by Gaia Photometric Science Alerts programme
Found in M31 at R.A. = 00h44m49s.170, Decl. = +41°47'28".18
Located 1401".9 east and 1879".7 north of the center of M31
Mag 19.2:2/28, Type unknown (References: Gaia observations)

AT2024eis (= Gaia24ays), TNS discovered 2024/02/28.773 by Gaia Photometric Science Alerts programme
Found in M31 at R.A. = 00h41m13s.760, Decl. = +41°05'50".06
Located 0".0 east and 0".0 north of the center of M31
Mag 20.9:2/28, Type unknown (References: Gaia observations)

Nova M31 2024-03b? (= PNV J00424600+4116446), CBAT TOCP discovered 2024/03/13.831 by Kamil Hornoch et al.
Found in M31 at R.A. = 00h42m46s.000, Decl. = +41°16'44".60
Located 18".9 east and 36".1 north of the center of M31 (Discovery image)
Mag 16.4:3/13, Type unknown (References: CBAT TOCP)

AT2024dya (= MASTER OT J004520.34+413426.8) (= Gaia24ayt), TNS discovered 2024/03/05.432 by MASTER
Found in M31 at R.A. = 00h45m20s.328, Decl. = +41°34'26".54
Located 1754".9 east and 1098".3 north of the center of M31
Mag 18.1:3/13 (16.7:3/5), Type unknown (References: Gaia observations)

AT2024ccb (= PSP24L) (= PNV J00425721+4119038) (= ATLAS24chb) (= Gaia24asv), TNS discovered 2024/02/10.594 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m57s.187, Decl. = +41°19'03".69
Located 145".3 east and 175".3 north of the center of M31 (Discovery image)
Mag 17.7:2/28 (16.9:2/11), Type EGN (References: AstroNote 2024-50, CBAT TOCP, Gaia observations)

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)

AT2022zyr (= XM88MZ) (= PNV J00424719+4116196) (= M31N 2022-11b) (= PNV J00424726+4116335), TNS discovered 2022/11/12.526 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m47s.190, Decl. = +41°16'19".60
Located 32".3 east and 11".3 north of the center of M31 (Discovery image) (Hornoch Discovery image) (Joel Nicolas image unconfirmed)
Mag 18.8:11/26 (16.1:11/12), Type EGN (Note: Recurent Nova) (References: ATEL 15759, ATEL 15760, ATEL 15779, CBAT TOCP CBAT TOCP; Nova M31N 1984-11b, M31N 2012-09a)

AT2022fcy (= PSP22P) (= PNV J00441072+4154224) (= M31N 2022-03d), TNS discovered 2022/03/05.592 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h44m10s.720, Decl. = +41°54'22".40
Located 974".0 east and 2294".9 north of the center of M31 (Discovery image) (Hornoch image)
Mag 17.7:3/5/2022, Type unknown (Note: Recurrent Nova) (References: ATEL 15729, CBAT TOCP; = M31N 2017-01e)

Nova M31 2008-12a (= PTF09hsd) (= AT2023yvj) (= Nova M31 2011-10e?) (= PSP23R) (= TCP J00452884+4154095) (= Nova M31 2012-10a?), (= PNV J00452885+4154094), (= Nova M31 2011-10e?) (= PNV J00452888+4154097) (= PNV J00452883+4154096) 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 20.9:12/13 (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 Current Extragalactic Novae
Other Supernovae from 2024 Other Extragalactic Novae from 2024 Unconfirmed objects from 2024
Other Supernovae from 2023 Extragalactic Novae from 2023 Unconfirmed objects from 2023
Supernovae from 2022 Extragalactic Novae from 2022 Unconfirmed objects from 2022

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