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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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 0".0 east and 0".0 north of the center of M31
Mag 18.0:5/23, Type unknown (References: 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 0".0 east and 0".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 0".0 east and 0".0 north of the center of M81
Mag 20.9:5/14, Type unknown

Nova M31 2017-04b? (= PNV J00424610+4118390), ATEL 10317 discovered 2017/04/24.108 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m46s.100, Decl. = +41°18'39".00
Located 20".0 east and 150".5 north of the center of M31 (Discovery image)
Mag 16.3:4/24, Type unknown (References: CBAT TOCP)

Nova M81 2017-04c? (= AT2017dfw) (= PS17cko) TNS discovered 2017/04/07.256 by K. C. Chambers et al.; M. Henze et al.
Found in M81 at R.A. = 09h56m08s.380, Decl. = +68°56'33".93
Located 189".2 west and 441".1 south of the center of M81 (Discovery image)
Mag 21.7:4/20 (20.4:4/7), Type unknown (References: ATEL 10348, ATEL 10312)

Nova M81 2017-04b? (= PNV J09551279+6900093), ATEL 10290 discovered 2017/04/18.801 by R. Belligoli et al.
Found in M81 at R.A. = 09h55m12s.790, Decl. = +69°00'09".30
Located 109".4 west and 225".8 south of the center of M81 (Discovery image)
Mag 19.9:4/18, Type unknown (References: CBAT TOCP)

MASTER OT J004056.15+405819.1, ATEL 10268 discovered 2017/04/13.053 by MASTER robotic Net
Found in M31 at R.A. = 00h40m56s.150, Decl. = +40°58'19".10
Located 0".0 east and 0".0 north of the center of M31 (Discovery image)
Mag 16.7:4/13, Type unknown

Nova M81 2017-04a? (= AT2017dbo) (= PNV J09552544+6905239) (= PS17cgn), ATEL 10254 discovered 2017/04/07.282 by Kamil Hornoch et al.
Found in M81 at R.A. = 09h55m25s.440, Decl. = +69°05'23".90
Located 41".4 west and 88".8 north of the center of M81 (Discovery image) (PS1 image)
Mag 19.7:4/11, Type FeII (References: ATEL 10276, TNS)

Nova M81 2017-03a, ATEL 10295 discovered 2017/03/22.910 by S.C. Williams et al.
Found in M81 at R.A. = 09h55m28s.040, Decl. = +69°05'26".00
Located 27".5 west and 90".9 north of the center of M81
Mag 20.1:4/4 (19.9:3/22), 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