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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AT2017ixs, (= Nova M31 2017-12d) (= MASTER OT J004355.89+413209.9), TNS discovered 2017/12/15.740 by George Carey
Found in M31 at R.A. = 00h43m56s.000, Decl. = +41°32'11".30
Located 808".0 east and 962".8 north of the center of M31 (Discovery image) (MASTER image) (Geroge Carey image)
Mag 19.0:6/20, Type unknown (References: ATEL 11755)

AT2018cmi, TNS discovered 2018/06/13.166 by Emmanuel Conseil
Found in M31 at R.A. = 00h42m19s.670, Decl. = +40°56'40".70
Located 0".0 east and 0".0 north of the center of M31 (Discovery image) (Emmanuel Conseil image) (Emmanuel Conseil image)
Mag 17.2:6/14, Type He/N nova (References: ATEL 11765)

AT2018bto (= PNV J00434212+4122349) (= Gaia18bkp), TNS discovered 2018/05/18.176 by Emmanuel Conseil; Kamil Hornoch and H. Kucakova
Found in M31 at R.A. = 00h43m42s.110, Decl. = +41°22'34".80
Located 651".1 east and 386".4 north of the center of M31 (Discovery image) (Hornoch discovery image) (Emmanuel Conseil image)
Mag 18.1:6/2 (18.0:5/18), Type Nova (References: ATEL 11765, ATEL 11656, CBAT TOCP, Gaia observations)

AT2018bgr, TNS discovered 2018/05/08.205 by Emmanuel Conseil
Found in M31 at R.A. = 00h45m34s.900, Decl. = +41°57'40".40
Located 1912".9 east and 2491".9 north of the center of M31 (Discovery image) (Emmanuel Conseil image) (Emmanuel Conseil image)
Mag 18.2:5/16 (16.6:5/8), Type unknown

AT2018bej (= ASASSN-18jj) (= Gaia18boy), TNS discovered 2018/05/03.960 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in LMC at R.A. = 06h26m20s.760, Decl. = -69°45'46".30
Located 0".0 east and 0".0 north of the center of LMC (Yuri Puzzoli image)
Mag 13.0:5/15 (12.1:5/3), Type FeII (zhost=0.000927) (References: ATEL 11610, Gaia observations)

AT2018bcy, TNS discovered 2018/04/30.219 by Emmanuel Conseil
Found in M31 at R.A. = 00h41m14s.360, Decl. = +40°56'17".50
Located 1016".8 west and 1191".0 south of the center of M31 (Discovery image (mirror)) (Emmanuel Conseil image) (Emmanuel Conseil image) (Emmanuel Conseil image) (Emmanuel Conseil image) (Emmanuel Conseil image) (Emmanuel Conseil image)
Mag 17.6:5/18 (17.3:5/10), Type unknown

Nova M31 2018-04c? (= PNV J00415353+4114121), ATEL 11589 discovered 2018/04/29.102 by Kamil Hornoch and H. Kucakova
Found in M31 at R.A. = 00h41m53s.530, Decl. = +41°14'12".10
Located 572".8 west and 116".4 south of the center of M31 (Discovery image)
Mag 17.5:4/29, Type unknown (References: CBAT TOCP)

Nova M31 2018-04b? (= PNV J00421895+4113524), ATEL 11549 discovered 2018/04/19.121 by Kamil Hornoch et al.
Found in M31 at R.A. = 00h42m18s.950, Decl. = +41°13'52".40
Located 286".2 west and 136".1 south of the center of M31 (Discovery image)
Mag 16.9:4/19, Type unknown (References: CBAT TOCP)

AT2018asx (= XMr5ZX) (= PNV J09555269+6858409), TNS discovered 2018/04/09.628 by Zhijian Xu and Xing Gao; K. Hornoch
Found in M81 at R.A. = 09h55m52s.690, Decl. = +68°58'40".90
Located 104".3 east and 314".5 south of the center of M81 (Discovery image) (K. Hornoch image) (Zhijian Xu & Xing Gao image) (Roberto De Lorenzo image)
Mag 18.7:4/12, Type FeII (References: ATEL 11562, ATEL 11527)

Nova M31 2018-04a? (= PNV J00425509+4119009), ATEL 11515 discovered 2018/04/03.788 by Kamil Hornoch et al.
Found in M31 at R.A. = 00h42m55s.090, Decl. = +41°19'00".90
Located 121".3 east and 172".4 north of the center of M31 (Discovery image)
Mag 17.6:4/3, Type unknown (References: CBAT TOCP)

AT2018apj (= XMr4ZX) (= PNV J09553194+6909147), TNS discovered 2018/04/02.615 by Zhijian Xu and Xing Gao; K. Hornoch et el.
Found in M81 at R.A. = 09h55m31s.940, Decl. = +69°09'14".70
Located 7".0 west and 319".5 north of the center of M81 (Discovery image) (K. Hornoch image)
Mag 20.4:4/2, Type unknown (References: ATEL 11499, TOCP)

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 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