2020 Supernova Boneyard

Welcome to the Boneyard.   On this page you will find entries for objects that have been confirmed as Cataclysmic variables, asteriods (otherwise known as Vermin of the sky), or some other non extragalactic event.   Why keep them around? Because you never know when something like this will come back to life...

AT2020adgm (= ASASSN-20qc) (= Gaia21alu), ATEL 14284 discovered 2020/12/20.270 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 04h13m02s.448, Decl. = -53°04'21".72
Located 0".0 east and 0".0 north of the center of the host galaxy (Discovery image)
Mag 17.4:12/20, Type AGN (References: TNS, Gaia observations)

AT2020adag (= ASASSN-20qa), ATEL 14284 discovered 2020/12/17.290 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 01h45m27s.200, Decl. = +02°08'04".20
Located 0".0 east and 0".0 north of the center of the host galaxy (Discovery image)
Mag 18.1:12/17, Type Galaxy (References: AstroNote 2021-5, TNS)

AT2020aavs (= ASASSN-20ot), TNS discovered 2020/11/22.540 by All Sky Automated Survey for SuperNovae (ASAS-SN) at R.A. = 05h05m15s.946, Decl. = -07°17'07".76 Mag 16.6:11/22, Type CV (References: ATEL 14278)

AT2020aahp, TNS discovered 2020/11/16.445 by Hitoshi Yamaoka
Found in NGC 932 at R.A. = 02h27m55s.590, Decl. = +20°20'03".50
Located 0".0 east and 0".0 north of the center of NGC 932 (Discovery image) (K. Itagaki image unconfirmed)
Mag 15.0:11/16, Type unconfirmed

AT2020aabf (= AHTS-2020-002), TNS discovered 2020/11/16.365 by AHTS at R.A. = 06h41m09s.680, Decl. = +19°47'31".10 Mag 16.4:11/16, Type CV? (Discovery image)

AT2020vce (= NGCA-V49), TNS discovered 2020/10/07.238 by Gabriel Cristian Neagu and Jan Ovidiu Tercu at R.A. = 15h25m37s.570, Decl. = -55°23'44".20 Mag 16.0:10/7, Type CV

AT2020uex, TNS discovered 2020/09/25.677 by Koichi Itagaki
Found in NGC 772 at R.A. = 01h59m11s.890, Decl. = +18°58'55".00
Located 0".0 east and 0".0 north of the center of NGC 772 (Discovery image) (Jordi Camarasa image unconfirmed) (Enrico Prosperi image unconfirmed)
Mag 17.5:9/25, Type unknown (References: SN 2003iq, 2003hl)

AT2020rml (= GSNST-20ca), TNS discovered 2020/08/16.471 by GSNST
Found in NGC 513 at R.A. = 01h24m27s.398, Decl. = +33°47'56".53
Located 0".0 east and 0".0 north of the center of NGC 513 (Manfred Mrotzek image unconfirmed) (Andre Mantero image unconfirmed)
Mag 18.1:8/16, Type unconfirmed (References: AstroNote 2020-161)

AT2020ril (= ASASSN-20jy), TNS discovered 2020/08/13.860 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 14h59m19s.118, Decl. = -47°26'06".97
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 13.8:8/13, Type CV

AT2020rjf (= PGIR20emh) (= Gaia20dtv), TNS discovered 2020/07/18.230 by Gattini_Bot
Found in an anonymous galaxy at R.A. = 17h30m40s.060, Decl. = -27°48'47".38
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 12.5:7/18, Type ulens (References: ATEL 13969, ATEL 13977, Gaia observations)

AT2020qqs (= ASASSN-20jm), TNS discovered 2020/08/01.860 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 17h14m53s.090, Decl. = -56°01'49".12
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 14.4:8/1, Type CV?

AT2020qov (= ASASSN-20jk) (= Gaia20eix), TNS discovered 2020/07/24.260 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 15h08m10s.152, Decl. = -09°13'04".62
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 14.9:8/8, Type CV (References: Gaia observations)

AT2020ptx, TNS discovered 2020/07/20.170 by Berto Monard
Found in IC 208 at R.A. = 02h08m25s.440, Decl. = +06°24'00".40
Located 0".0 east and 0".0 north of the center of IC 208
Mag 17.6:7/20, Type unconfirmed (References: SN 2017glq, 2003G)

AT2020ohl (= ASASSN-20hx), ATEL 13891 discovered 2020/07/10.340 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in NGC 6297 at R.A. = 17h03m36s.541, Decl. = +62°01'32".36
Located 0".0 east and 0".0 north of the center of NGC 6297 (Discovery image)
Mag 16.7:7/10, Type TDE (zhost=0.016657) (References: ATEL 13893, ATEL 13895, TNS)

AT2020noi, TNS discovered 2020/06/27.073 by Massimo Caimmi (ISSP)
Found in UGC 12687 at R.A. = 23h35m20s.040, Decl. = +12°55'13".80
Located 0".0 east and 0".0 north of the center of UGC 12687
Mag 17.5:6/27, Type MP (asteroid 4602)

AT2020lrn (= AT2021kmb), TNS discovered 2020/06/04.208 by Zhang
Found in NGC 5363 at R.A. = 13h56m06s.800, Decl. = +05°15'15".70
Located 0".0 east and 0".0 north of the center of NGC 5363
Mag 14.0:6/4, Type * (Note: Foreground star)

AT2020lnf (= GSNST-20bt), TNS discovered 2020/06/01.484 by GSNST
Found in NGC 4849 at R.A. = 12h58m11s.274, Decl. = +26°23'54".19
Located 0".0 east and 0".0 north of the center of NGC 4849 (Andre Mantero image unconfirmed)
Mag 16.4:6/1, Type unconfirmed

AT2020lkp (= ASASSN-20fu), ATEL 13843 discovered 2020/05/30.140 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in NGC 567 at R.A. = 01h27m02s.393, Decl. = -10°15'54".42
Located 0".0 east and 0".0 north of the center of NGC 567 (Discovery image)
Mag 16.8:5/30, Type TDE? (zhost=0.023026) (References: TNS)

AT2020lhs (= ASASSN-20ft) (= Gaia20cmq), ATEL 13772 discovered 2020/05/29.440 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 20h23m02s.291, Decl. = +21°23'48".65
Located 4".4 west and 0".7 north of the center of host galaxy (Discovery image) (Odd Trondal image) (Gregor Krannich image) (Enrico Prosperi image)
Mag 18.4:6/28 (15.5:5/29), Type CV (References: TNS, Gaia observations)

AT2020leu, TNS discovered 2020/05/24.000 by Philip Hoyle
Found in NGC 5363 at R.A. = 13h57m06s.000, Decl. = +05°09'12".00
Located 0".0 east and 0".0 north of the center of NGC 5363 (Andre Mantero image) (Manfred Mrotzek image unconfirmed)
Mag 13.0:5/24, Type star?

AT2020eux (= ASASSN-20dm), TNS discovered 2020/03/23.067 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in anonymous galaxy at R.A. = 17h11m09s.612, Decl. = +21°21'46".48
Located 0".0 east and 0".0 north of the center of the host galaxy
Mag 16.4:3/23, Type CV

AT2020efm (= BraTS-OCA-T1-011) (= Gaia20bju), TNS discovered 2020/03/08.181 by BraTS
Found in PGC 502251 at R.A. = 11h58m49s.870, Decl. = -47°23'22".50
Located 0".0 east and 0".0 north of the center of PGC 502251 (Discovery image) (Diego Canosa image) (Robert Spellman image)
Mag 14.2:3/17 (12.9:3/8), Type CV (References: Gaia observations)

AT2020dpy, TNS discovered 2020/02/27.750 by Thévenot at R.A. = 07h59m15s.267, Decl. = -31°08'44".66 Mag 11.6:2/27, Type CV

AT2020cwh, TNS discovered 2020/02/18.500 by John Stevenson
Found in M66 at R.A. = 11h20m20s.000, Decl. = +12°59'25".00
Located 73".6 east and 4".5 south of the center of M66 (Discovery image) (Robert Spellman reference image) (Enrico Prosperi image unconfirmed)
Mag 11.0:2/18, Type unconfirmed (References: AstroNote 2020-44)