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 M31 2017-03b? (= PNV J00424502+4116395), ATEL 10166 discovered 2017/03/10.796 by Kamil Hornoch, Hana Kucakova and Jan Vrastil
Found in M31 at R.A. = 00h42m45s.020, Decl. = +41°16'39".50
Located 7".8 east and 31".0 north of the center of M31 (Discovery image)
Mag 17.3:3/10, Type unknown (References: CBAT TOCP)

Nova M31 2017-03a? (= PNV J00430201+4113190) (= AT2017cfr) (= Gaia17arh), ATEL 10139 discovered 2017/03/01.754 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h43m02s.010, Decl. = +41°13'19".00
Located 199".0 east and 169".0 south of the center of M31 (Discovery image)
Mag 18.1:3/12, Type FeII (References: ATEL 10143, TNS, Gaia observations)

Nova M81 2017-02d? (= PNV J09555331+6858162), ATEL 10134 discovered 2017/02/24.119 by Kamil Hornoch et al.
Found in M81 at R.A. = 09h55m53s.310, Decl. = +68°58'16".20
Located 108".2 east and 338".9 south of the center of M81 (Discovery image)
Mag 20.4:2/26, Type unknown

Nova M81 2017-02c?, (= AT2017blf) (= PNV J09563136+6907294), TNS discovered 2017/02/25.823 by Flavio Castellani, and Raffaele Belligoli, Claudio Marangoni, Fernando Marziali (ISSP); Kamil Hornoch et al.
Found in M81 at R.A. = 09h56m31s.360, Decl. = +69°07'29".40
Located 313".0 east and 209".0 north of the center of M81 (Discovery image (mirror)) (K. Hornoch image)
Mag 19.3:2/25, Type unknown (References: ATEL 10133, TOCP)

Nova M81 2017-02b?, ATEL 10101 discovered 2017/02/08.050 by S.C. Williams et al.
Found in M81 at R.A. = 09h55m27s.600, Decl. = +69°03'57".00
Located 29".9 west and 1".9 north of the center of M81
Mag 20.6:2/8, Type unknown

Nova M81 2017-02a? (= AT2017axz), TNS discovered 2017/02/19.920 by Flavio Castellani, Raffaele Belligoli, Claudio Marangoni and Fernando Marziali (ISSP); Kamil Hornoch et al.
Found in M81 at R.A. = 09h55m36s.180, Decl. = +69°06'21".00
Located 16".2 east and 145".9 north of the center of M81 (Discovery image) (K. Hornoch image)
Mag 19.3:2/19, Type unknown (References: ATEL 10102)

Nova M31 2017-02a? (= AT2017axi), TNS discovered 2017/02/18.746 by Raffaele Belligoli et al. (ISSP)
Found in M31 at R.A. = 00h42m38s.120, Decl. = +41°14'10".70
Located 3".0 east and 115".0 south of the center of M31 (Discovery image) (ISSP image)
Mag 18.3:2/18, Type unknown (References: CBAT TOCP)

Nova M31 2017-01f? (= PNV J00425145+4118352), ATEL 10098 discovered 2017/01/22.720 by Kamil Hornoch et al.
Found in M31 at R.A. = 00h42m51s.450, Decl. = +41°18'35".20
Located 80".3 east and 146".0 north of the center of M31 (Discovery image)
Mag 18.4:1/22, Type unknown

Nova M31 2017-01e? (= TCP J00441072+4154221), CBAT TOCP discovered 2017/01/31.395 by Koichi Itagaki
Found in M31 at R.A. = 00h44m10s.720, Decl. = +41°54'22".10
Located 965".0 east and 2294".0 north of the center of M31 (K. Itagaki image)
Mag 17.8:1/31, Type He/N (References: ATEL 10042)

Nova M81 2017-01a ATEL 9979 discovered 2017/01/13.879 by G. Sala et al.
Found in M81 at R.A. = 09h55m39s.800, Decl. = +69°06'28".10
Located 35".4 east and 153".0 north of the center of M81
Mag 21.3:1/20 (19.4:1/13), Type unknown

Nova M31 2017-01d? (= PNV J00424147+4116595), ATEL 9976 discovered 2017/01/19.705 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m41s.470, Decl. = +41°16'59".50
Located 32".2 west and 51".0 north of the center of M31 (Discovery image)
Mag 16.88:1/22, Type unknown (References: CBAT TOCP, ATEL 10003)

Nova M31 2017-01c? (= PNV J00422133+4112018), ATEL 9974 discovered 2017/01/18.701 by Kamil Hornoch, H. Kucakova, J. Vrastil
Found in M31 at R.A. = 00h42m21s.330, Decl. = +41°12'01".80
Located 259".4 west and 246".7 south of the center of M31 (Discovery image) (George Carey image prediscovery) (George Carey image) (K. Itagaki image) (Robert Spellman image) (Robert Spellman image) (Robert Spellman image) (Robert Spellman image) (Robert Spellman image)
Mag 14.6:1/31, Type FeII (References: ATEL 10028, CBAT TOCP, ATEL 10003)

Nova M31 2017-01a? (= PNV J00424525+4116108) ATEL 9958 discovered 2017/01/13.879 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m45s.250, Decl. = +41°16'10".80
Located 10".4 east and 2".3 north of the center of M31 (Discovery image)
Mag 17.8:1/22 (16.6:1/8), Type unknown (References: ATEL 10002, ATEL 10003)

Nova M31 2016-12d? (= AT2016jbg) (= Gaia17ann), TNS discovered 2016/12/25.510 by Wei Gao and Xing Gao
Found in M31 at R.A. = 00h43m01s.490, Decl. = +41°16'59".40
Located 193".6 east and 50".9 north of the center of M31 (Discovery image) (George Carey image) (Gianpiero Locatelli image)
Mag 17.95:1/22 (17.2:12/25), Type FeIIb (References: ATEL 9941, ATEL 9915, ATEL 10003, Gaia observations)

Nova M31 2016-12c? (= AT2016ize) (= PNV J00424659+4116578), TNS discovered 2016/12/21.714 by R. Belligoli et al.; Kamil Hornoch (ISSP)
Found in M31 at R.A. = 00h42m46s.590, Decl. = +41°16'57".80
Located 25".5 east and 49".3 north of the center of M31 (K. Hornoch image)
Mag 17.7:1/22, Type unknown (References: ATEL 9896, ATEL 9915, ATEL 10003)

Nova M31 2016-12b? (= PNV J00431106+4113573), (= AT2016ixa) (= Gaia16cda), CBAT TOCP discovered 2016/12/11.447 by Koichi Nishiyama and Fujio Kabashima
Found in M31 at R.A. = 00h43m11s.060, Decl. = +41°13'57".30
Located 301".0 east and 131".0 south of the center of M31 (Dicovery image)
Mag 18.65:1/22 (17.6:12/11), Type unknown (References: TNS, Gaia observations, ATEL 10003)

Nova M31 2016-12a? (= PNV J00422939+4113564), CBAT TOCP discovered 2016/12/11.447 by Koichi Nishiyama and Fujio Kabashima
Found in M31 at R.A. = 00h42m29s.390, Decl. = +41°13'56".40
Located 168".0 west and 132".0 south of the center of M31 (Discovery image)
Mag 20.03:1/22 (17.6:12/11), Type unknown (References: ATEL 10003)

Nova M31 2016-11b? (= PNV J00424281+4112334) (= PNV J00424279+4112336) (= Nova M31 2016-12a?), ATEL 9799 discovered 2016/11/27.759 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m42s.810, Decl. = +41°12'33".40
Located 17".1 west and 215".1 south of the center of M31 (Discovery image) (George Cary image) (LOSS image)
Mag 19.81:1/22 (17.7:11/27), Type unknown (References: CBAT TOCP, CBAT TOCP, ATEL 10003)

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 2017 Other Extragalactic Novae from 2017 Unconfirmed objects from 2017
Other supernovae from 2016 Other Extragalactic Novae from 2016 Unconfirmed objects from 2016
Supernovae from 2015 Extragalactic Novae from 2015 Unconfirmed objects from 2015

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