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 megellanic 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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Nova M81 2018-11a? (= PNV J09555246+6902009), ATEL 12187 discovered 2018/11/06.186 by Kamil Hornoch et al.
Found in M81 at R.A. = 09h55m52s.460, Decl. = +69°02'00".90
Located 103".0 east and 114".0 south of the center of M81 (Discovery image)
Mag 19.2:11/7, Type unknown (References: CBAT TOCP)

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 19.0:11/7/2018 (15.91:10/2/2014), Type FeII (recurrent nova) (References: ATEL 3725, 3727, 3728, 4503, 5607, 5611, 5627, 5633, 6527, 6532, 6535, 6537, 6540, 6543, 6546, 6558, 6565, 6604, 7964, 7965, 7967, 7968, 7969, 7974, 7976, 7979, 7980, 7984, 8029, 8033, 8038, 8062, 9415, 9848, 9852, 9853, 9857, 9861, 9864, 9865, 9872, 9874, 9881, 9883, 9885, 9891, (9906 corrected), 9907, 9910, 11116, 11117, 11118, 11121, 11124, 11125, 11126, 11130, 11133, 11134, 11144, 11149, 11214, 12177, 12179, 12181, 12182, 12189, 12190, 12195, 12200, 12203, 12204)
Nova M31 2008-12a images subpage

AT2018hwq (= GSNST 2018-ak), TNS discovered 2018/11/06.351 by Cedric Raguenaud and Malhar R. Kendurkar
Found in M31 at R.A. = 00h42m47s.540, Decl. = +41°17'19".40
Located 0".0 east and 0".0 north of the center of M31
Mag 17.1:11/6, Type unknown (zhost=-0.001000)

AT2018hvv (= GSNST 2018-aj), TNS discovered 2018/11/05.394 by Malhar R. Kendurkar
Found in M31 at R.A. = 00h43m24s.070, Decl. = +41°15'31".17
Located 0".0 east and 0".0 north of the center of M31
Mag 18.4:11/5, Type unknown (zhost=-0.001000)

AT2018hrg (= kait-18ay) (= ATLAS18ycn), TNS discovered 2018/10/31.371 by Lick Observatory Supernova Search
Found in NGC 404 at R.A. = 01h09m26s.330, Decl. = +35°42'39".60
Located 8".4 west and 25".7 south of the center of NGC 404 (Discovery image (mirror)) (Yuji Tanaka image) (Manfred Mrotzek image)
Mag 17.6:11/1, Type Nova (zhost=-0.000160) (References: ATEL 12159, ATEL 12155)

AT2018hoo (= XMr6ZX) (= GSNST 2018-ai), TNS discovered 2018/10/26.575 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m54s.960, Decl. = +41°12'28".80
Located 120".0 east and 219".7 south of the center of M31 (Discovery image) (Robert Spellman image) (Geroge Carey image) (Nick James image)
Mag 18.5:10/26, Type unknown

AT2018hld (= Nova M31 2018-10c?) (= ATLAS18xcg) (= TCP J00420310+4102331), CBAT TOCP discovered 2018/10/15.457 by Koichi Nishiyama and Fujio Kabashima
Found in M31 at R.A. = 00h42m03s.100, Decl. = +41°02'33".10
Located 466".0 west and 815".0 south of the center of M31 (Koichi Nishiyama image) (George Carey image) (Yuji Tanaka image) (Malhar R. Kendurkar image) (Cedric Raguenaud image) (Cedric Raguenaud image)
Mag 16.9:10/21 (16.3:10/17), Type FeII (z=-0.0017) (References: ATEL 12138, TNS)

AT2018hhy (= PNV J01334673+3032181), CBAT TOCP discovered 2018/10/13.880 by Raffaele Belligoli, Flavio Castellani and Claudio Marangoni (ISSP)
Found in M33 at R.A. = 01h33m46s.730, Decl. = +30°32'18".10
Located 54".0 west and 438".0 south of the center of M33 (Discovery image) (Marc Serrau image) (Marc Serrau image)
Mag 17.2:10/21, Type LPV (References: ATEL 12138, ATEL 12113)

Nova M81 2018-10a? (= PNV J09560988+6859108), ATEL 12114 discovered 2018/10/12.151 by Kamil Hornoch et al.
Found in M81 at R.A. = 09h56m09s.880, Decl. = +68°59'10".80
Located 197".1 east and 284".3 south of the center of M81 (Discovery image)
Mag 20.1:10/12, Type unknown (References: CBAT TOCP)

AT2018hho (= PNV J00424012+4117273), TNS discovered 2018/10/13.822 by Raffaele Belligoli, Flavio Castellani and Claudio Marangoni (ISSP)
Found in M31 at R.A. = 00h42m40s.13, Decl. = +41°17'26".9
Located 43".7 west and 81".3 north of the center of M31 (Discovery image) (K. Hornoch image) (P. Sola la Serna image) (Universidad de La Laguna image)
Mag 17.5:10/13, Type unknown (References: ATEL 12127, ATEL 12113, CBAT TOCP)

AT2018hfs (= XM146QY) (= PNV J00424990+4123348), TNS discovered 2018/10/10.601 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m49s.840, Decl. = +41°23'35".00
Located 62".2 east and 446".5 north of the center of M31 (Discovery image) (George Carey image) (K. Hornoch image) (Roberto De Lorenzo image)
Mag 17.9:10/11, Type unknown (References: ATEL 12100, CBAT TOCP)

AT2018hcd (= XMNGS1), TNS discovered 2018/09/13.615 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h43m32s.520, Decl. = +41°07'12".80
Located 544".0 east and 535".7 south of the center of M31 (Discovery image)
Mag 20.0:9/13, Type LPV (References: ATEL 12138)

AT2018had (= kait-18as), TNS discovered 2018/10/01.322 by Lick Observatory Supernova Search
Found in M31 at R.A. = 00h40m09s.050, Decl. = +41°36'56".16
Located 1746".0 west and 1247".6 north of the center of M31 (Discovery image)
Mag 19.3:10/1, Type unknown

AT2018gqg (= kait-18an), TNS discovered 2018/09/17.453 by Lick Observatory Supernova Search
Found in M31 at R.A. = 00h40m36s.140, Decl. = +41°38'49".93
Located 1441".0 west and 1361".4 north of the center of M31 (Discovery image)
Mag 19.2:9/17, Type unknown

AT2018fsy (= Gaia18cof), TNS discovered 2018/09/02.965 by Emmanuel Conseil
Found in M31 at R.A. = 00h44m19s.850, Decl. = +41°29'26".50
Located 1075".2 east and 798".0 north of the center of M31 (Discovery image) (Cedric Raguenaud image) (Andre Mantero image) (Robert Spellman image)
Mag 17.7:9/7 (17.5:9/4), Type FeII (References: ATEL 12017, Gaia observations)

archive.gif For Novae which have faded below 18th magnitude, you will have to look in the archives
Current supernovae
Other supernovae from 2018 Other Extragalactic Novae from 2018 Unconfirmed objects from 2018
Other supernovae from 2017 Other Extragalactic Novae from 2017 Unconfirmed objects from 2017

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