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Active supernovae

The below table lists all currently active (candidate) supernovae brighter than magnitude 18.
For more information about a certain supernova, click on its designation.

Supernova Discovery Maximum Last observed
designation host type ra dec date discoverer(s) date magn date magn
AT2021dzvESO 174-G1?13:48:13.18-53:18:24.81 Mar 2021DLT401 Mar 202117.41 Mar 202117.4
AT2021dvm?07:09:45.31-45:44:31.626 Feb 2021ATLAS26 Feb 202117.826 Feb 202117.8
AT2021dww?19:50:35.82-39:28:34.525 Feb 2021Gaia25 Feb 202116.325 Feb 202116.3
AT2021duy?18:35:33.51+39:56:14.425 Feb 2021ATLAS25 Feb 202117.525 Feb 202117.5
AT2021dwbESO 460-G3?19:27:07.77-29:54:27.424 Feb 2021Gaia24 Feb 202117.024 Feb 202117.0
AT2021dxaESO 398-G11?19:34:52.00-34:13:50.424 Feb 2021Gaia24 Feb 202117.424 Feb 202117.4
AT2021dxn?12:42:51.23-77:55:41.224 Feb 2021MASTER24 Feb 202117.724 Feb 202117.7
AT2021dvzYSO19:29:23.19+17:53:02.423 Feb 2021Gaia23 Feb 202117.223 Feb 202117.2
AT2021dwaQSO19:23:32.19-21:04:33.423 Feb 2021Gaia23 Feb 202117.923 Feb 202117.9
2021dnnNGC 304Ia00:56:06.28+24:07:31.222 Feb 2021ATLAS23 Feb 202115.623 Feb 202115.6
AT2021dvqYSO21:01:27.10+68:10:38.021 Feb 2021Gaia21 Feb 202117.121 Feb 202117.1
AT2021dmsMCG -2-9-33?03:21:24.07-11:08:45.721 Feb 2021ZTF21 Feb 202117.921 Feb 202117.9
AT2021dkbESO 116-G5?03:02:32.65-57:51:36.420 Feb 2021ASAS-SN20 Feb 202116.620 Feb 202116.6
AT2021dju?05:03:30.29-58:11:49.619 Feb 2021ASAS-SN19 Feb 202117.819 Feb 202117.8
AT2021dgq?06:56:55.14-47:01:18.019 Feb 2021BraTS19 Feb 202114.919 Feb 202114.9
AT2021djxQSO09:47:59.84+06:10:43.619 Feb 2021MASTER19 Feb 202116.219 Feb 202116.2
AT2021dsm?19:10:44.78-05:25:04.019 Feb 2021Gaia19 Feb 202116.319 Feb 202116.3
2021depKUG 1401+278Ia14:04:12.62+27:37:34.818 Feb 2021ASAS-SN18 Feb 202117.018 Feb 202117.0
AT2021dnw?18:25:45.41-27:10:43.318 Feb 2021Gaia18 Feb 202117.118 Feb 202117.1
AT2021dllulens?14:07:38.86-64:38:25.718 Feb 2021Gaia18 Feb 202117.318 Feb 202117.3
AT2021dlnulens?17:54:34.89-36:12:29.418 Feb 2021Gaia18 Feb 202115.418 Feb 202115.4
AT2021dmlYSO08:40:56.11-40:46:29.018 Feb 2021Gaia18 Feb 202116.718 Feb 202116.7
AT2021diy?17:13:53.29-41:29:51.917 Feb 2021Gaia17 Feb 202117.517 Feb 202117.5
AT2021dmbYSO10:48:26.31-59:43:28.217 Feb 2021Gaia17 Feb 202116.717 Feb 202116.7
AT2021dlx?20:40:49.82+38:22:57.217 Feb 2021Gaia17 Feb 202116.917 Feb 202116.9
AT2021dly?19:02:30.64-02:43:18.817 Feb 2021Gaia17 Feb 202117.217 Feb 202117.2
AT2021dlw?18:02:56.02-28:14:42.417 Feb 2021Gaia17 Feb 202117.217 Feb 202117.2
AT2021dlmulens?18:24:53.39-21:34:04.317 Feb 2021Gaia17 Feb 202117.717 Feb 202117.7
AT2021ddy?11:10:58.97-55:47:17.416 Feb 2021Gaia16 Feb 202117.516 Feb 202117.5
AT2021dcdM31FeII00:42:04.24+40:42:33.616 Feb 2021XOSS17 Feb 202116.517 Feb 202116.5
AT2021dce?07:50:43.11-57:51:52.715 Feb 2021MASTER15 Feb 202117.815 Feb 202117.8
AT2021dcn?11:56:28.86-53:58:26.215 Feb 2021Gaia15 Feb 202117.115 Feb 202117.1
AT2021ddx?11:44:27.57-54:54:11.315 Feb 2021Gaia15 Feb 202117.715 Feb 202117.7
AT2021dqy?10:43:02.69-09:01:41.415 Feb 2021ATLAS15 Feb 202117.715 Feb 202117.7
AT2021dbw?12:15:35.12-52:05:28.314 Feb 2021Gaia14 Feb 202114.714 Feb 202114.7
AT2021cvf3C 287.1?13:32:53.28+02:00:45.713 Feb 2021ZTF13 Feb 202117.813 Feb 202117.8
AT2021cwcUGC 3502?06:39:46.83+65:27:07.613 Feb 2021ATLAS14 Feb 202116.514 Feb 202116.5
AT2021cya?08:59:10.33-34:00:28.913 Feb 2021Gaia13 Feb 202117.013 Feb 202117.0
2021dapCGCG 085-026Ia07:03:34.73+18:57:26.713 Feb 2021PS121 Feb 202117.021 Feb 202117.0
AT2021csr?02:04:44.85+29:13:40.512 Feb 2021ATLAS12 Feb 202117.012 Feb 202117.0
AT2021csl?16:56:24.44-09:05:17.410 Feb 2021Gaia10 Feb 202117.710 Feb 202117.7
AT2021dbj?17:31:04.99+14:39:46.510 Feb 2021MASTER10 Feb 202117.210 Feb 202117.2
2021clwNGC 2115Ia05:51:19.94-50:34:57.110 Feb 2021ASAS-SN10 Feb 202116.710 Feb 202116.7
AT2021cop?11:23:44.01-34:49:49.99 Feb 2021Gaia9 Feb 202116.99 Feb 202116.9
AT2021ckp?19:46:12.11+23:56:46.48 Feb 2021Gaia8 Feb 202117.48 Feb 202117.4
AT2021cko?18:02:43.10+11:56:52.68 Feb 2021Gaia8 Feb 202117.78 Feb 202117.7
2021bxuESO 478-G6IIb02:09:16.47-23:24:45.26 Feb 2021ATLAS6 Feb 202117.26 Feb 202117.2
AT2021cag?06:02:41.71-59:51:54.06 Feb 2021ASAS-SN6 Feb 202117.36 Feb 202117.3
AT2021caj?01:53:45.86+30:02:53.76 Feb 2021PS16 Feb 202117.96 Feb 202117.9
2021bzsIa05:04:20.95-20:25:03.26 Feb 2021ZTF6 Feb 202117.86 Feb 202117.8
AT2021bzx?13:10:53.99+64:51:45.25 Feb 2021ATLAS5 Feb 202117.15 Feb 202117.1
AT2021cst?06:49:52.73+62:48:56.04 Feb 2021ZTF4 Feb 202116.810 Feb 202117.4
AT2021buvAfterglow07:48:19.32+11:24:34.24 Feb 2021ZTF4 Feb 202117.14 Feb 202117.1
2021bsfIa12:06:04.03+20:32:13.54 Feb 2021ATLAS4 Feb 202117.24 Feb 202117.2
AT2021buu?08:43:31.45-26:01:42.04 Feb 2021ASAS-SN4 Feb 202117.44 Feb 202117.4
2021bugNGC 4533II12:34:22.75+02:19:02.14 Feb 2021ZTF16 Feb 202117.716 Feb 202117.7
2021bolCGCG 458-021Ia01:07:48.78+16:28:07.23 Feb 2021ZTF5 Feb 202117.85 Feb 202117.8
AT2021bro?19:46:15.23+21:56:11.83 Feb 2021MASTER3 Feb 202117.23 Feb 202117.2
AT2021bpy?02:32:13.84+48:20:34.23 Feb 2021ZTF3 Feb 202114.224 Feb 202115.8
AT2021boaM31FeII00:43:46.45+41:33:40.83 Feb 2021XOSS3 Feb 202116.83 Feb 202116.8
2021cdtIa14:39:53.01+12:22:17.53 Feb 2021ZTF3 Feb 202117.13 Feb 202117.1
2021bmxESO 317-G6Ia10:14:50.25-38:11:29.92 Feb 2021ATLAS11 Feb 202115.811 Feb 202115.8
AT2021bna?09:08:06.06-60:54:16.82 Feb 2021MASTER2 Feb 202117.62 Feb 202117.6
2021bmwIC 4325II13:47:39.71-29:25:54.62 Feb 2021ATLAS2 Feb 202117.92 Feb 202117.9
2021blsNGC 6223Ia-91bg16:43:20.73+61:35:41.51 Feb 2021ATLAS1 Feb 202117.41 Feb 202117.4
AT2021bluUGC 5829LBV10:42:34.34+34:26:15.01 Feb 2021ATLAS11 Feb 202116.512 Feb 202116.5
AT2021bmj2MFGC 02785?03:23:43.46-57:54:56.831 Jan 2021ASAS-SN31 Jan 202117.231 Jan 202117.2
AT2021bma?07:23:42.81-33:33:55.131 Jan 2021ATLAS31 Jan 202117.531 Jan 202117.5
AT2021blo?18:01:12.97+18:50:21.231 Jan 2021ATLAS31 Jan 202117.131 Jan 202117.1
2021bkwLEDA 1634284Ia14:21:13.60+20:42:53.931 Jan 2021ATLAS16 Feb 202115.316 Feb 202115.3
2021bkmIa02:02:54.05-04:07:18.431 Jan 2021ASAS-SN31 Jan 202117.031 Jan 202117.0
2021bmsCGCG 539-105Ia02:49:31.17+40:33:03.931 Jan 2021ATLAS14 Feb 202116.915 Feb 202116.9
2021bjyCGCG 264-017Ia08:49:33.43+50:52:03.530 Jan 2021ATLAS30 Jan 202116.930 Jan 202116.9
AT2021bjn?00:32:31.99+47:23:31.330 Jan 2021ATLAS30 Jan 202117.830 Jan 202117.8
AT2021bjlLEDA 996765?01:33:09.41-08:58:48.430 Jan 2021ATLAS30 Jan 202117.930 Jan 202117.9
AT2021bjq?15:48:08.54-25:07:00.329 Jan 2021ATLAS29 Jan 202117.129 Jan 202117.1
AT2021bjo?14:10:10.32-16:48:19.529 Jan 2021ATLAS29 Jan 202117.529 Jan 202117.5
2021bizNGC 4227Ia12:16:34.76+33:31:35.529 Jan 2021ATLAS11 Feb 202115.322 Feb 202116.0
2021biyNGC 4631LRN12:42:04.02+32:32:07.929 Jan 2021ATLAS11 Feb 202116.319 Feb 202117.5
2021bjbLEDA 89838Ia14:03:40.32-34:11:02.129 Jan 2021ATLAS29 Jan 202117.929 Jan 202117.9
2021bhbIa06:48:22.52+64:47:10.728 Jan 2021ATLAS28 Jan 202117.828 Jan 202117.8
AT2021bhm?21:01:02.86+34:58:34.228 Jan 2021Gaia28 Jan 202116.928 Jan 202116.9
AT2021bhc?06:12:55.95-69:23:43.028 Jan 2021MASTER28 Jan 202117.028 Jan 202117.0
AT2021bgi?12:30:35.40+42:57:55.627 Jan 2021GSNST27 Jan 202116.927 Jan 202116.9
2021bgeUGC 2505II03:03:00.64-01:04:57.627 Jan 2021Koichi Itagaki6 Feb 202116.112 Feb 202116.4
AT2021bfsM31FeII00:42:52.20+41:16:24.626 Jan 2021Italian Supernovae Search Project31 Jan 202116.131 Jan 202116.1
AT2021bgc?19:21:19.34+50:57:48.926 Jan 2021Gaia26 Jan 202117.226 Jan 202117.2
AT2021bfr?10:09:19.89+10:46:34.226 Jan 2021GSNST26 Jan 202117.226 Jan 202117.2
AT2021beo?18:31:44.41+65:11:29.924 Jan 2021ATLAS24 Jan 202116.724 Jan 202116.7
2021bbmNGC 2959II09:45:07.27+68:35:29.324 Jan 2021ATLAS11 Feb 202116.622 Feb 202117.5
AT2021bfa?12:24:12.13+31:16:38.023 Jan 2021PS123 Jan 202116.323 Jan 202116.3
AT2021bbf?17:36:17.82-65:01:46.323 Jan 2021MASTER23 Jan 202116.323 Jan 202116.3
AT2021bbi?20:43:19.39+54:44:51.123 Jan 2021Gaia23 Jan 202116.420 Feb 202117.3
2021bbzARK 321Ia11:45:23.60+20:19:28.123 Jan 2021Gaia23 Jan 202117.923 Jan 202117.9
AT2021azj?00:09:54.07-48:06:48.421 Jan 2021Gaia21 Jan 202117.521 Jan 202117.5
AT2021axg?07:26:40.64+16:26:48.920 Jan 2021XOSS20 Jan 202117.420 Jan 202117.4
2021assNGC 684II01:50:10.13+27:38:42.818 Jan 2021ZTF11 Feb 202116.711 Feb 202116.7
AT2021avv?11:24:28.36-63:15:30.817 Jan 2021Gaia17 Jan 202117.717 Jan 202117.7
2021apfCGCG 056-009Ia18:04:22.18+07:17:01.016 Jan 2021ZTF16 Jan 202115.325 Feb 202117.1
AT2021anyAfterglow08:15:15.34-05:52:01.216 Jan 2021ZTF16 Jan 202117.916 Jan 202117.9
AT2021atd?12:22:43.03-75:32:40.116 Jan 2021Gaia16 Jan 202117.816 Jan 202117.8
AT2021aop?05:54:03.17+20:06:57.416 Jan 2021XOSS16 Jan 202117.816 Jan 202117.8
AT2021akn?18:02:07.78+14:55:17.015 Jan 2021ZTF15 Jan 202117.915 Jan 202117.9
2021akwIa09:18:20.46-29:53:57.115 Jan 2021ATLAS30 Jan 202117.230 Jan 202117.2
AT2021ary?22:52:10.14-45:06:10.414 Jan 2021Gaia14 Jan 202117.114 Jan 202117.1
2021ajhLEDA 2380113Ia12:10:00.85+50:42:15.514 Jan 2021ATLAS20 Jan 202117.220 Jan 202117.2
AT2021agq?12:10:17.18-09:03:59.013 Jan 2021Gaia13 Jan 202117.913 Jan 202117.9
AT2021agn?23:19:50.18-28:26:43.613 Jan 2021Gaia13 Jan 202117.813 Jan 202117.8
AT2021aeo?10:42:29.37-21:59:42.013 Jan 2021ATLAS13 Jan 202117.213 Jan 202117.2
AT2021afb?15:12:43.82-28:28:45.313 Jan 2021ATLAS13 Jan 202116.713 Jan 202116.7
2021adsNGC 5215Ia13:35:07.55-33:28:59.513 Jan 2021ASAS-SN13 Jan 202115.721 Feb 202117.2
AT2021agw?00:56:52.05+53:18:01.012 Jan 2021ZTF12 Jan 202117.712 Jan 202117.7
AT2021afk?12:25:30.05+31:06:43.111 Jan 2021PS111 Jan 202117.511 Jan 202117.5
AT2021ada?12:26:08.02-00:06:02.311 Jan 2021Gaia11 Jan 202117.511 Jan 202117.5
AT2021adf?15:33:01.32-60:35:28.910 Jan 2021Gaia10 Jan 202117.210 Jan 202117.2
2021xrIa11:07:45.17-02:14:04.110 Jan 2021ZTF18 Jan 202117.918 Jan 202117.9
2021xnIa01:37:50.93+53:39:51.910 Jan 2021ZTF16 Jan 202116.011 Feb 202116.5
AT2021wg?07:54:52.55-38:54:27.29 Jan 2021ATLAS29 Jan 202117.429 Jan 202117.4
AT2021aja?17:23:18.75+11:28:03.38 Jan 2021ZTF8 Jan 202117.78 Jan 202117.7
2021thLEDA 2165801Ia16:29:26.15+40:26:23.08 Jan 2021ATLAS8 Jan 202117.929 Jan 202117.9
2021osII12:02:54.07+05:36:53.27 Jan 2021ZTF12 Jan 202117.812 Jan 202117.8
2021nvUGC 1436Ia01:57:35.17+19:52:43.37 Jan 2021ATLAS8 Jan 202117.88 Jan 202117.8
AT2021jh?16:27:34.98-13:04:28.65 Jan 2021ZTF5 Jan 202116.87 Jan 202117.3
AT2021jf?15:35:26.84+11:33:38.85 Jan 2021ZTF5 Jan 202117.05 Jan 202117.0
AT2021ij?22:56:20.61+25:53:19.55 Jan 2021ZTF19 Jan 202117.019 Jan 202117.0
2021mfESO 323-G66Ia13:01:51.23-41:24:14.65 Jan 2021ATLAS5 Jan 202117.45 Jan 202117.4
AT2021nsESO 102-G5?17:27:45.51-64:33:46.25 Jan 2021Gaia5 Jan 202117.65 Jan 202117.6
AT2021gp?09:05:57.78-32:46:03.85 Jan 2021ATLAS5 Jan 202117.85 Jan 202117.8
AT2021ik?22:41:20.86+27:01:25.55 Jan 2021ZTF20 Jan 202117.920 Jan 202117.9
AT2021gm?22:51:16.51-19:42:38.05 Jan 2021ATLAS5 Jan 202117.95 Jan 202117.9
AT2021dwAfterglow06:55:05.30+64:40:34.34 Jan 2021XOSS4 Jan 202117.44 Jan 202117.4
2021fvCGCG 033-001Ia08:43:48.91+02:43:12.14 Jan 2021ATLAS15 Feb 202117.515 Feb 202117.5
AT2021acf?08:42:58.63-21:45:03.03 Jan 2021ZTF3 Jan 202117.03 Jan 202117.0
AT2021ga?16:38:30.88-62:17:57.93 Jan 2021Gaia3 Jan 202117.43 Jan 202117.4
2021ftCGCG 483-058II?02:27:43.81+26:14:03.63 Jan 2021ATLAS7 Jan 202117.68 Jan 202117.6
2021doNGC 3147Ic10:16:56.67+73:23:51.32 Jan 2021ZTF16 Jan 202116.511 Feb 202117.2
2021TIa00:39:18.99-00:27:20.82 Jan 2021ZTF10 Jan 202117.410 Jan 202117.4
2021agIa16:34:24.93+07:17:06.12 Jan 2021ZTF2 Jan 202117.62 Jan 202117.6
AT2021ay?16:05:37.68-63:03:05.21 Jan 2021Gaia1 Jan 202117.71 Jan 202117.7
2021JNGC 4414Ia12:26:27.02+31:13:20.61 Jan 2021ZTF15 Jan 202112.522 Feb 202114.6
2021KMCG +6-30-84Ia13:47:10.69+34:05:21.31 Jan 2021ZTF9 Jan 202115.116 Feb 202115.5
AT2020aerc?23:54:35.66+34:52:50.631 Dec 2020ATLAS15 Jan 202117.715 Jan 202117.7
AT2020aeqy?00:49:51.83+51:26:41.630 Dec 2020XOSS30 Dec 202017.230 Dec 202017.2
2020adqyNGC 3500Ia11:01:51.65+75:12:01.927 Dec 2020ZTF6 Jan 202116.717 Jan 202117.3
2020aeqpIa12:29:21.75+31:15:16.226 Dec 2020ATLAS7 Jan 202117.97 Jan 202117.9
2020adkzKUG 1134+193Ia11:37:30.16+19:02:33.822 Dec 2020ASAS-SN22 Dec 202017.212 Jan 202117.4
2020adldIa11:02:26.11+45:36:18.220 Dec 2020ZTF10 Jan 202117.910 Jan 202117.9
2020adgcIa02:47:37.00-28:26:54.420 Dec 2020ATLAS1 Jan 202117.21 Jan 202117.2
2020adfjUGC 5877II10:47:54.49+76:50:46.220 Dec 2020ZTF2 Jan 202117.12 Jan 202117.1
2020adisIa-91T15:04:23.48+35:53:48.219 Dec 2020ZTF31 Dec 202017.531 Dec 202017.5
2020actpUGC 8825Ia13:54:05.33+33:34:57.512 Dec 2020ZTF3 Jan 202117.43 Jan 202117.4
2020acmaESO 437-G19Ia10:37:57.86-28:54:30.812 Dec 2020ATLAS16 Dec 202015.96 Feb 202117.2
AT2020abzwLEDA 736224?13:15:31.77-28:53:02.98 Dec 2020ATLAS8 Dec 202016.59 Feb 202117.8
2020abqlESO 18-G6Ia08:21:32.24-80:34:00.95 Dec 2020ASAS-SN5 Dec 202015.519 Jan 202117.2
2020abjqUGC 678II01:06:14.63+03:34:26.12 Dec 2020ATLAS14 Dec 202016.32 Feb 202117.3
2020xtzNGC 6574Ia18:11:51.10+14:58:56.821 Oct 2020ZTF10 Nov 202014.17 Feb 202117.2
2020uxzNGC 514Ia01:24:06.89+12:55:17.35 Oct 2020Koichi Itagaki23 Oct 202013.512 Feb 202117.1
2020rcqUGC 6930Ia11:57:14.68+49:17:32.09 Aug 2020ZTF25 Aug 202011.822 Feb 202117.8
2020qmpUGC 7125II12:08:44.44+36:48:17.324 Jul 2020PGIR14 Nov 202014.124 Feb 202116.2
2020nvbNGC 4457Ia12:28:58.79+03:34:22.11 Jul 2020Koichi Itagaki19 Jul 202011.810 Jan 202117.8
2020nlbM85Ia12:25:24.18+18:12:12.525 Jun 2020ATLAS11 Jul 202012.02 Feb 202117.6
 



    Terminology:
            
    magn:       Magnitude (brightness) estimate    
    ra:         Right ascension
    dec:        Declination

Active supernova data as provided by ASRAS (Astronomy Section Rochester Academy of Science).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.