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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AT2017gay (= Nova M31 2010-12a) (= Nova M31 1957-10b) (= PT And) TNS discovered 2017/08/15.001 by Emmanuel Conseil
Found in M31 at R.A. = 00h40m24s.370, Decl. = +41°04'03".20
Located 1580".3 west and 725".3 south of the center of M31 (Discovery image)
Mag 15.8:8/15, Type LPV (References: ATEL 10647)

Nova M31 2017-08a? (= PNV J00423895+4115171), ATEL 10618 discovered 2017/08/03.840 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m38s.950, Decl. = +41°15'17".10
Located 61".0 west and 51".0 south of the center of M31 (Discovery image)
Mag 17.5:8/3, Type unknown (References: CBAT TOCP)

AT2017fvz, (= kait-17bm) TNS discovered 2017/08/02.366 by Lick Observatory Supernova Search
Found in NGC 6822 at R.A. = 19h45m01s.030, Decl. = -14°46'50".74
Located 0".0 east and 0".0 north of the center of NGC 6822 (Discovery image)
Mag 16.6:08/03, Type FeII (zhost=-0.000190) (References: ATEL 10630)

AT2017fvb, (= XM13AL) TNS discovered 2017/07/31.822 by Peiyuan Sun and Xing Gao
Found in M31 at R.A. = 00h42m47s.210, Decl. = +41°16'51".20
Located 32".6 east and 42".7 north of the center of M31 (Discovery image)
Mag 17.5:7/31, Type unknown

Nova M31 2017-07d (= PSN J00390448+4046041), CBAT TOCP discovered 2017/07/20.632 by Koichi Itagaki
Found in M31 at R.A. = 00h39m04s.480, Decl. = +40°46'04".10
Located 2497".0 west and 1804".0 south of the center of M31 (Discovery image)
Mag 17.9:07/24 (17.0:7/20), Type FeII (References: ATEL 10619)

Nova M31 2017-07c? (= PNV J00424126+4116102), ATEL 10585 discovered 2017/07/19.953 by Kamil Hornoch and Petr Fatka
Found in M31 at R.A. = 00h42m41s.260, Decl. = +41°16'10".20
Located 34".5 west and 1".7 north of the center of M31 (Discovery image)
Mag 16.1:7/19, Type unknown (References: CBAT TOCP)

Nova M31 2017-07b? (= AT2017fog) (= XMd3ZX) (= PNV J00431504+4120506), TNS discovered 2017/07/19.878 by Zhijian Xu and Xing Gao; Kamil Hornoch and Petr Fatka
Found in M31 at R.A. = 00h43m14s.980, Decl. = +41°20'49".80
Located 345".7 east and 281".3 north of the center of M31 (Discovery image) (K. Hornoch, P. Fatka image) (Zhijian Xu and Xing Gao image)
Mag 16.7:07/24, Type FeII (SCOPIO spctrum) (References: ATEL 10596, CBAT TOCP, ATEL 10588)

Nova M31 2017-07a (= AT2017foa), TNS discovered 2017/07/19.128 by Emmanuel Conseil
Found in M31 at R.A. = 00h43m14s.500, Decl. = +41°33'57".20
Located 339".4 east and 1068".7 north of the center of M31 (Discovery image)
Mag 18.4:7/19, Type FeII (References: ATEL 10619)

Nova M31 2017-06j? (= PNV J00425962+4121290), ATEL 10547 discovered 2017/06/29.984 by Kamil Hornoch and Petr Fatka
Found in M31 at R.A. = 00h42m59s.620, Decl. = +41°21'29".00
Located 172".3 east and 320".5 north of the center of M31 (Discovery image)
Mag 18.5:6/29, Type unknown (References: CBAT TOCP)

MASTER OT J004127.19+410354.4, ATEL 10515 discovered 2017/06/21.205 by MASTER robotic Net
Found in M31 at R.A. = 00h41m27s.190, Decl. = +41°03'54".40
Located 0".0 east and 0".0 north of the center of M31 (Discovery image)
Mag 17.8:06/22, Type unknown

MASTER OT J004357.21+411135.2, ATEL 10506 discovered 2017/06/06.190 by MASTER robotic Net
Found in M31 at R.A. = 00h43m57s.210, Decl. = +41°11'35".20
Located 0".0 east and 0".0 north of the center of M31 (Discovery image)
Mag 18.6:6/6, Type LPV

MASTER OT J004617.94+415626.1 (= PNV J00461806+4156251), ATEL 10506 discovered 2017/06/19.197 by MASTER robotic Net
Found in M31 at R.A. = 00h46m17s.940, Decl. = +41°56'26".10
Located 2385".0 east and 2417".0 north of the center of M31 (Discovery image) (K. Itagaki image)
Mag 18.1:7/8, Type unknown (References: CBAT TOCP)

Nova M31 2017-06f? (= PNV J00424379+4113295), ATEL 10507 discovered 2017/06/19.052 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m43s.790, Decl. = +41°13'29".50
Located 6".0 west and 159".0 south of the center of M31 (Discovery image)
Mag 17.7:6/19, Type unknown (References: ATEL 10522, CBAT TOCP)

Nova M31 2017-06e? (= AT2017epj) (= PNV J00410538+4030467) (= Gaia17bmf), CBAT TOCP discovered 2017/06/14.781 by Gaia Photometric Science Alerts programme; Koichi Nishiyama and Fujio Kabashima
Found in M31 at R.A. = 00h41m05s.380, Decl. = +40°30'46".70
Located 1115".0 west and 2722".0 south of the center of M31
Mag 17.4:6/14, Type FeII (References: ATEL 10497, TNS, Gaia observations)

Nova M31 2017-06c (= PNV J00423291+4112236), ATEL 10484 discovered 2017/06/10.991 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m32s.910, Decl. = +41°12'23".60
Located 128".7 west and 224".9 south of the center of M31 (Discovery image)
Mag 18.2:6/10, Type FeII (References: ATEL 10487, ATEL 10522, CBAT TOCP)

Nova M31 2017-06b (= PNV J00425119+4116279), ATEL 10484 discovered 2017/06/10.991 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m51s.190, Decl. = +41°16'27".90
Located 77".4 east and 19".4 north of the center of M31 (Discovery image)
Mag 17.6:6/10, Type unknown (References: ATEL 10522, CBAT TOCP)

Nova M31 2017-06a? (= PNV J00423878+4115498), ATEL 10476 discovered 2017/06/07.994 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m38s.780, Decl. = +41°15'49".80
Located 62".5 west and 18".7 south of the center of M31 (Discovery image)
Mag 16.5:6/7, Type unknown (References: ATEL 10522, CBAT TOCP)

Nova M31 2017-05b (= AT2017ehm) (= Gaia17bjg) (= PNV J00424904+4112418) (= Nova M31 2017-06d?) TNS discovered 2017/05/23.533 by Gaia Photometric Science Alerts programme; Koichi Nishiyama and Fujio Kabashima
Found in M31 at R.A. = 00h42m49s.092, Decl. = +41°42'41".61
Located 53".6 east and 1593".1 north of the center of M31
Mag 17.4:6/14, Type EGN (References: ATEL 10520, Gaia observations, CBAT TOCP)

Nova M31 2017-05a (= AT2017egi) (= Gaia17biq) TNS discovered 2017/05/23.783 by Gaia Photometric Science Alerts programme
Found in M31 at R.A. = 00h42m18s.247, Decl. = +40°53'57".23
Located 294".8 west and 1331".3 south of the center of M31
Mag 18.0:5/23, Type FeIIb (References: ATEL 10432, Gaia observations)

Nova M81 2017-05b ATEL 10393 discovered 2017/05/03.890 by S.C. Williams et al.
Found in M81 at R.A. = 09h55m38s.850, Decl. = +69°05'52".00
Located 30".3 east and 117".0 north of the center of M81
Mag 19.3:5/14, Type unknown

Nova M81 2017-05a ATEL 10393 discovered 2017/05/14.010 by S.C. Williams et al.
Found in M81 at R.A. = 09h55m24s.610, Decl. = +69°06'59".10
Located 46".0 west and 184".0 north of the center of M81
Mag 20.9:5/14, Type unknown

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