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 2019-06a? (= PNV J09554664+6902473), ATEL 12859 discovered 2019/06/09.875 by Kamil Hornoch et al.
Found in M81 at R.A. = 09h55m46s.640, Decl. = +69°02'47".30
Located 72".2 east and 67".8 south of the center of M81 (Discovery image)
Mag 19.1:6/9, Type unknown (References: CBAT TOCP)

AT2019gap (= XM12MZ) (PNV J00432058+4125426) (= Gaia19chy), TNS discovered 2019/05/28.891 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h43m20s.580, Decl. = +41°25'42".60
Located 408".8 east and 574".1 north of the center of M31 (Discovery image) (Xingming Observatory image)
Mag 16.8:6/13, Type unknown (References: CBAT TOCP, Gaia observations)

AT2019fyd (= XM11MZ), TNS discovered 2019/05/24.821 by Xingming Observatory Sky Survey (XOSS)
Found in M31 at R.A. = 00h42m21s.980, Decl. = +41°23'58".40
Located 251".9 west and 469".9 north of the center of M31 (Discovery image)
Mag 16.7:5/24, Type unknown (References: CBAT TOCP)

Nova M31 2019-04b? (= PNV J00424174+4116263), ATEL 12694 discovered 2019/04/26.106 by Hana Kucakova and Kamil Hornoch
Found in M31 at R.A. = 00h42m41s.740, Decl. = +41°16'26".30
Located 29".1 west and 17".8 north of the center of M31 (Discovery image)
Mag 16.6:4/26, Type unknown (References: CBAT TOCP)

AT2019ebb, TNS discovered 2019/04/25.215 by Emmanuel Conseil
Found in M31 at R.A. = 00h40m36s.070, Decl. = +40°42'33".10
Located 0".0 east and 0".0 north of the center of M31 (Discovery image) (Emmanuel Conseil image) (Emmanuel Conseil image)
Mag 18.0:5/6 (17.2:4/25), Type unknown (References: VSnet observations)

Nova M31 2019-04a? (= PNV J00423396+4113577), ATEL 12666 discovered 2019/04/16.121 by Kamil Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m33s.960, Decl. = +41°13'57".70
Located 116".9 west and 130".8 south of the center of M31 (Discovery image)
Mag 17.3:4/16, Type unknown (References: CBAT TOCP)

AT2019dlz (= XM10MZ) (= PNV J09555100+6902323), TNS discovered 2019/04/14.669 by Xingming Observatory Sky Survey (XOSS)
Found in M81 at R.A. = 09h55m51s.000, Decl. = +69°02'32".30
Located 96" east and 83" north of the center of M81 (Discovery image)
Mag 19.8:4/14, Type unknown (References: CBAT TOCP)

archive.gif For Novae which have faded below 18th magnitude, you will have to look in the archives
Current supernovae
Other supernovae from 2019 Other Extragalactic Novae from 2019 Unconfirmed objects from 2019
Other supernovae from 2018 Other Extragalactic Novae from 2018 Unconfirmed objects from 2018
Supernovae from 2017 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