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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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)
Mag 16.3:10/17, Type unknown (References: 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)
Mag 18.1:10/13, Type unknown (References: 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.090, Decl. = +41°17'27".70
Located 43".7 west and 81".3 north of the center of M31 (Discovery image) (K. Hornoch image)
Mag 17.5:10/13, Type unknown (References: 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 unknown

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)

AT2018fhy (= GSNST 2018-ac), TNS discovered 2018/08/21.149 by Malhar Kendurkar and Cedric Raguenaud
Found in M31 at R.A. = 00h43m10s.530, Decl. = +41°16'56".71
Located 0".0 east and 0".0 north of the center of M31 (Discovery image) (Malhar R. Kendurkar image) (Emmanuel Conseil image unconfirmed) (Emmanuel Conseil image unconfirmed) (Andrea Mantero image unconfirmed) (Kees Scherer image) (Cedric Raguenaud image) (Robert Spellman image)
Mag 18.4:8/28 (16.3:8/21), Type unknown (zhost=-0.001000) (References: ATEL 11983)

AT2018fjw (= Nova M31 2018-08d?) (= PNV J00451587+4210269) (= Gaia18coe) (= ZTF18abnuzzt) (= ATLAS18udr), CBAT TOCP discovered 2018/08/21.728 by Koichi Itagaki
Found in M31 at R.A. = 00h45m15s.870, Decl. = +42°10'26".90
Located 1685".0 east and 3258".0 north of the center of M31 (Discovery image) (Andrea Mantero image)
Mag 18.7:9/7 (17.9:8/21), Type FeII (References: ATEL 11983, Gaia observations)

AT2018feu (= RC18), TNS discovered 2018/08/17.760 by Rohit Chinchwadkar
Found in M31 at R.A. = 00h38m57s.680, Decl. = +42°42'59".00
Located 0".0 east and 0".0 north of the center of M31 (Andrea Mantero image unconfirmed)
Mag 18.5:8/17, Type unconfirmed (References: ATEL 11983)

Nova M31 2018-08b? (= PNV J00392190+4015488), CBAT TOCP discovered 2018/08/13.583 by Koichi Itagaki
Found in M31 at R.A. = 00h39m21s.900, Decl. = +40°15'48".80
Located 2317".0 west and 3620".0 south of the center of M31 (Discovery image) (Yuji Tanaka image)
Mag 18.2:8/17, Type unknown (References: ATEL 11983)

Nova M31 2018-08a? (= PNV J00424214+4114457), ATEL 11904 discovered 2018/08/02.087 by Kamil Hornoch et al.
Found in M31 at R.A. = 00h42m42s.140, Decl. = +41°14'45".70
Located 24".6 west and 82".8 south of the center of M31 (Discovery image)
Mag 17.5:8/2, Type FeII (References: ATEL 11923, CBAT TOCP)

AT2018ely (= PNV J00425074+4115461), TNS discovered 2018/07/31.089 by Raffaele Belligoli (ISSP)
Found in M31 at R.A. = 00h42m50s.740, Decl. = +41°15'46".10
Located 76".0 east and 19".0 south of the center of M31 (Discovery image)
Mag 19.1:7/31, Type unconfirmed (References: ATEL 11983, CBAT TOCP)

Nova M31 2018-07c? (= PNV J00425261+4118409), CBAT TOCP discovered 2018/07/15.001 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m52s.610, Decl. = +41°18'40".90
Located 93".4 east and 152".4 north of the center of M31 (Discovery image) (Malhar R. Kendurkar image)
Mag 17.6:7/17, Type FeII (References: ATEL 11866)

AT2018dya (= ASASSN-18pf) (= Gaia18bvg), ATEL 11857 discovered 2018/06/18.354 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in LMC at R.A. = 05h41m46s.461, Decl. = -71°48'37".5
Located 0".0 east and 0".0 north of the center of LMC (Joseph Brimacombe image) (Joseph Brimacombe image (negative image))
Mag 10.7:6/18, Type Nova (References: ATEL 11959, ATEL 11863, TNS, Gaia observations)

Nova M31 2018-07b? (= PNV J00420765+4119438), CBAT TOCP discovered 2018/07/12.752 by Koichi Itagaki; K. Hornoch and H. Kucakova
Found in M31 at R.A. = 00h42m07s.650, Decl. = +41°19'43".80
Located 413".4 west and 215".5 north of the center of M31 (Discovery image) (Malhar R. Kendurkar image) (Hornoch discovery image) (Malhar R. Kendurkar image) (Malhar R. Kendurkar image)
Mag 17.3:7/15 (17.3:7/12), Type FeII (References: ATEL 11866, ATEL 11849)

Nova M31 2018-07a? (= PNV J00414889+4109148), CBAT TOCP discovered 2018/07/01.727 by Koichi Itagaki; K. Hornoch and H. Kucakova
Found in M31 at R.A. = 00h41m48s.890, Decl. = +41°09'14".80
Located 625".3 west and 414".3 south of the center of M31 (Discovery image) (K. Hornoch image) (Malhar R. Kendurkar image) (G. Wells and D. Bamberger image) (Malhar R. Kendurkar image) (Malhar R. Kendurkar image)
Mag 17.9:7/15 (16.4:7/2), Type FeII (References: ATEL 11845, ATEL 11807)

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