Bright Supernovae - 2021

This data comes from IAU Circulars and occasionally more data will be provided on IAU's Astronomical Headlines page. An archive of the 2021 updates to this page is available.

This is a partial list of the SN discovered in 2021. Since 2021 is still ongoing, please look at the main page for the latest data.   In previous years I tried to keep the yearly archive alphabetically sorted by CBAT supernova name.   Since that is no longer applicable, I am sorting this archive by "first observed" date, which I have listed as the discovery date.   Note that Extra galactic Novae have been moved to a special Extra galactic novae page.   Mistakes (Galactic variables, asteroids, unconfirmed, etc) are in the boneyard.   I also maintain an archive of the updates.

AT2021qdr (= ASASSN-21le) (= ATLAS21wsx) (= Gaia21cyx), ATEL 14734 discovered 2021/06/11.420 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in MCG -2-3-74 at R.A. = 01h07m31s.368, Decl. = -13°16'11".32
Located 22".4 west and 5".5 north of the center of MCG -2-3-74 (Discovery image)
Mag 18.0:6/21 (17.4:6/11), Type unknown (zhost=0.053724) (References: Gaia observations, TNS; SN 1955B)

AT2021pfc (= ASASSN-21kh), ATEL 14734 discovered 2021/06/08.590 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 21h44m44s.977, Decl. = -18°47'02".65
Located 0".1 east and 0".2 north of the center of host galaxy (Discovery image)
Mag 17.8:6/8, Type unknown (zhost=0.050408) (References: TNS)

AT2021peo (= ASASSN-21ke), ATEL 14734 discovered 2021/06/08.340 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 00h33m13s.513, Decl. = -31°23'23".17
Located 1".5 west and 0".7 north of the center of host galaxy (Discovery image)
Mag 17.7:6/8, Type unknown (zhost=0.030800) (References: TNS)

MASTER OT J184517.22-534916.4, ATEL 14681 discovered 2021/06/05.967 by MASTER robotic Net
Found in FAIRALL 0850 at R.A. = 18h45m17s.220, Decl. = -53°49'16".40
Located 4".1 west and 12".9 north of the center of FAIRALL 0850
Mag 17.8:6/5, Type unknown (zhost=0.053037)

2021pbg (= ASASSN-21jx), ATEL 14734 discovered 2021/06/07.370 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 23h05m51s.445, Decl. = +18°16'06".46
Located 6".2 east and 1".9 north of the center of host galaxy (Discovery image)
Mag 17.6:6/7, Type Ia (z=0.041) (References: TNS)

AT2021oze (= ASASSN-21jv) (= Gaia21dbg), ATEL 14711 discovered 2021/06/06.150 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in NGC 1098 at R.A. = 02h44m53s.391, Decl. = -17°39'31".60
Located 3".4 west and 1".8 north of the center of NGC 1098 (Discovery image)
Mag 16.8:6/27 (16.2:6/6), Type unknown (zhost=0.024861) (References: TNS, Gaia observations)

2021oyx (= ASASSN-21ju), ATEL 14734 discovered 2021/06/06.150 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 23h55m27s.656, Decl. = -34°52'29".89
Located 0".1 west and 0".6 north of the center of host galaxy (Discovery image)
Mag 17.7:6/6, Type Ia-91bg (zhost=0.049921) (References: TNS)

2021oxn (= ASASSN-21jt) (= MASTER OT J020431.11+454636.7) (= Gaia21cxw), ATEL 14711 discovered 2021/06/06.600 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 02h04m31s.073, Decl. = +45°46'37".27
Located 75".5 east and 3".5 north of the center of host galaxy (Discovery image)
Mag 17.3:6/18 (16.9:6/6), Type Ia (zhost=0.026642) (References: TNS, Gaia observations)

AT2021nju (= ASASSN-21iw), ATEL 14711 discovered 2021/05/22.360 by All Sky Automated Survey for SuperNovae (ASAS-SN)
Found in an anonymous galaxy at R.A. = 00h39m47s.854, Decl. = -50°36'44".56
Located 4".9 east and 4".2 south of the center of host galaxy (Discovery image)
Mag 17.7:5/22, Type unknown (zhost=0.028000) (References: TNS)

2021mwj (= ATLAS21pki), AstroNote 2021-162 discovered 2021/05/21.260 by ATLAS
Found in NGC 2935 at R.A. = 09h36m41s.790, Decl. = -21°08'47".10
Located 42".8 west and 65".8 south of the center of NGC 2935 (Jean-Claude Merlin image) (Jean-Claude Merlin image) (Jean-Claude Merlin image) (Grzegorz Duszanowicz image) (Jean-Claude Merlin image)
Mag 17.2:5/28 (16.6:5/27), Type II (z=0.007575) (References: TNS, ATEL 14673)