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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AT2018bto (= PNV J00434212+4122349), 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 18.0:5/18, Type unknown (References: ATEL 11656, CBAT TOCP)

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) 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 12.6:5/5 (12.1:5/3), Type FeII (zhost=0.000927) (References: ATEL 11610)

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)

AT2018ajo (= HGR2010 6101), TNS discovered 2018/03/19.186 by R. Gagliano, R. Post, E. Weinberg, Jack Newton, and Tim Puckett
Found in UGC 5470 at R.A. = 10h08m27s.300, Decl. = +12°18'57".10 (= PGC 29488) (= Leo I Dwarf)
Located 11".7 west and 34".1 north of the center of UGC 5470 (Discovery image) (Tim Puckett image) (SNhunt imaage)
Mag 18.7:3/19, Type LPV (zhost=0.000940)

AT2018akh (= PNV J09551340+6900478) (= XMr3ZX), CBAT TOCP discovered 2018/03/20.704 by Zhijian Xu and Xing Gao; H. Kucakova et al.
Found in M81 at R.A. = 09h55m13s.53, Decl. = +69°00'48".1
Located 105".4 west and 187".0 south of the center of M81 (Discovery image) (K. Hornoch image)
Mag 21.2:3/20, Type unknown (References: ATEL 11465, TNS)

AT2018ajt, (= PNV J00424041+4112522) (= XM03MZ), CBAT TOCP discovered 2018/03/20.782 by Mi Zhang and Xing Gao; K. Hornoch and Hana Kucakova
Found in M31 at R.A. = 00h42m40s.410, Decl. = +41°12'52".20
Located 44".1 west and 196".3 south of the center of M31 (Discovery image) (K. Hornoch image)
Mag 18.1:3/21, Type unknown (References: TNS, ATEL 11461)

Nova M83 2018-02a? (= PNV J13370126-2955482), ATEL 11443 discovered 2018/02/26.233 by Kamil Hornoch and Hana Kucakova
Found in M83 at R.A. = 13h37m01s.260, Decl. = -29°55'48".20
Located 4".4 east and 231".5 south of the center of M83 (Discovery image)
Mag 21.8:3/17 (21.3:2/26), Type unknown

Nova M31 2018-03b, ATEL 11381 discovered 2018/03/07.746 by E. Ovcharov et el.
Found in M31 at R.A. = 00h45m21s.330, Decl. = +41°12'28".66
Located 1770".2 east and 219".9 south of the center of M31 (Discovery image)
Mag 19.2:3/11, Type unknown (References: ATEL 11402)

Nova M31 2018-03a, ATEL 11381 discovered 2018/03/07.746 by E. Ovcharov et el.
Found in M31 at R.A. = 00h43m44s.100, Decl. = +41°37'23".08
Located 674".0 east and 1274".6 north of the center of M31 (Discovery image) (George Carey image)
Mag 16.1:3/11, Type unknown (References: ATEL 11402)

AT2018aba, (= XM02MZ) (= PNV J09553607+6902141) TNS discovered 2018/03/06.630 by Mi Zhang and Xing Gao
Found in M81 at R.A. = 09h55m36s.070, Decl. = +69°02'14".10
Located 15".6 east and 100".9 south of the center of M81 (Discovery image)
Mag 20.8:3/6, Type unknown (References: TOCP)

AT2018ya (= Nova M31 2018-02b?) (= PNV J00415059+4125499) (= XM01MZ), CBAT TOCP discovered 2018/02/22.595 by Mi Zhang and Xing Gao, not Zhijian Xu and Xing Gao
Found in M31 at R.A. = 00h41m50s.590, Decl. = +41°25'49".90
Located 606".0 west and 581".0 north of the center of M31 (Discovery image) (George Carey image)
Mag 17.9:2/22, Type unknown (References: TNS)

AT2018xb (= Nova M81 2018-02a?) (= XMq9ZX) (= PNV J09545236+6904085), TNS discovered 2018/02/19.039 by Zhijian Xu and Xing Gao; Kamil Hornoch et al.
Found in M81 at R.A. = 09h54m52s.360, Decl. = +69°04'08".50
Located 218".9 west and 13".5 north of the center of M81 (Discovery image) (K. Hornoch image) (XOSS image)
Mag 20.0:2/19, Type unknown (References: ATEL 11325)

AT2018pp (= ASASSN-18ca) (= PNV J00423439+4044255), ATEL 11275 discovered 2018/02/07.383 by Koichi Itagaki
Found in M31 at R.A. = 00h42m34s.400, Decl. = +40°44'26".02
Located 113".0 west and 1903".0 south of the center of M31 (Discovery image) (Joseph Brimacombe image) (Geroge Carey image) (Joseph Brimacombe image) (T. Noguchi image)
Mag 17.1:2/12 (16.5:2/8), Type FeII (References: ATEL 11292, ATEL 11349, TNS, CBAT TOCP)

Nova M81 2018-01a? (= PNV J09555926+6903517), ATEL 11248 discovered 2018/01/30.776 by Kamil Hornoch et al.
Found in M81 at R.A. = 09h55m59s.260, Decl. = +69°03'51".70
Located 139".8 east and 3".4 south of the center of M81 (Discovery image)
Mag 20.3:1/30, Type unknown (References: CBAT TOCP)

Nova M83 2018-01a? (= PNV J13370978-2956576), ATEL 11240 discovered 2018/01/28.263 by Kamil Hornoch and Ernst Paunzen
Found in M83 at R.A. = 13h37m09s.780, Decl. = -29°56'57".60
Located 115".2 east and 300".9 south of the center of M83 (Discovery image)
Mag 20.7:1/28, 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 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