Recently discovered comets

The below table lists comets that have been discovered in the past 6 months.
For detailed information about a comet, click on its designation.

Comet(s) Today Perihelion Nearest approach
designation Hₒ magn delta radius date magn radius date magn delta
P/2021 A5 (PANSTARRS)15.021.22.49 AU2.63 AU11 Nov 202020.42.62 AU13 Oct 202020.31.68 AU
C/2021 A4 (NEOWISE)16.017.81.00 AU1.51 AU19 Mar 202116.91.15 AU12 Feb 202115.30.43 AU
C/2021 A2 (NEOWISE)13.511.90.78 AU1.42 AU22 Jan 202111.41.41 AU3 Feb 202111.00.51 AU
C/2021 A1 (Leonard)8.518.84.68 AU4.96 AU3 Jan 20226.20.62 AU13 Dec 20211.90.23 AU
C/2020 Y3 (ATLAS)13.618.32.07 AU2.06 AU3 Dec 202018.72.00 AU11 Mar 202118.31.59 AU
C/2020 Y2 (ATLAS)6.517.85.76 AU5.65 AU17 Jun 202214.13.13 AU20 Mar 202213.92.92 AU
C/2020 X4 (Leonard)9.020.05.90 AU5.23 AU10 Nov 202019.75.21 AU27 Aug 202119.84.61 AU
C/2020 X3 (SOHO)15.017.20.60 AU1.08 AU14 Dec 2020-1.10.01 AU6 Jan 202116.00.55 AU
C/2020 X2 (ATLAS)10.618.82.90 AU3.86 AU15 Nov 202018.93.83 AU30 Dec 202018.72.86 AU
P/2020 X1 (ATLAS)13.020.02.64 AU3.07 AU21 Jul 202019.92.87 AU5 Nov 202019.21.97 AU
C/2020 W5 (Lemmon)15.022.62.86 AU3.39 AU30 Nov 202022.33.36 AU2 Dec 202022.32.51 AU
P/2020 W1 (Rankin)10.020.84.98 AU5.40 AU4 Apr 202021.25.29 AU7 Oct 201920.54.35 AU
P/2020 V4 (Rankin)9.019.44.47 AU5.23 AU18 Jul 202120.05.15 AU17 Jan 202219.34.29 AU
P/2020 V3 (PANSTARRS)8.319.95.47 AU6.23 AU7 Feb 202120.06.23 AU13 Dec 202019.95.33 AU
C/2020 V2 (ZTF)4.918.57.86 AU8.18 AU8 May 202310.92.23 AU17 Sep 202310.51.86 AU
C/2020 U5 (PANSTARRS)8.018.74.52 AU5.48 AU27 Apr 202216.83.76 AU28 Dec 202116.63.39 AU
C/2020 U4 (PANSTARRS)7.018.65.36 AU6.28 AU7 Apr 202218.25.35 AU30 Nov 202117.64.47 AU
C/2020 U3 (Rankin)15.020.42.25 AU2.29 AU5 Feb 202120.52.28 AU18 Oct 202020.51.87 AU
P/2020 U2 (PANSTARRS)18.021.21.24 AU1.86 AU25 Dec 202020.81.85 AU14 Nov 202020.60.91 AU
C/2020 T5 (Lemmon)16.021.32.29 AU2.24 AU9 Oct 202020.11.89 AU14 Jun 202020.81.64 AU
C/2020 T4 (PANSTARRS)13.018.82.64 AU2.92 AU5 Jul 202117.82.19 AU1 Dec 202019.02.35 AU
P/2020 T3 (PANSTARRS)18.019.41.06 AU1.44 AU20 Jan 202119.41.44 AU26 Oct 202019.40.82 AU
C/2020 T2 (Palomar)11.016.72.51 AU2.90 AU11 Jul 202114.62.05 AU12 May 202114.51.41 AU
C/2020 S8 (Lemmon)12.518.92.94 AU2.55 AU10 Apr 202117.12.36 AU23 Apr 202117.01.42 AU
P/2020 S7 (PANSTARRS)14.521.83.21 AU2.98 AU18 Nov 202021.12.96 AU17 Sep 202020.81.99 AU
P/2020 S6 (Leonard)16.019.31.22 AU1.93 AU23 Nov 202018.51.87 AU20 Nov 202018.50.89 AU
P/2020 S5 (PANSTARRS)14.521.12.61 AU2.85 AU8 Aug 202020.52.68 AU16 Oct 202020.01.75 AU
C/2020 S4 (PANSTARRS)8.519.66.98 AU7.25 AU9 Feb 202314.63.37 AU6 Feb 202314.62.39 AU
C/2020 S3 (Erasmus)13.59.71.85 AU0.91 AU12 Dec 20205.00.40 AU19 Nov 20207.41.04 AU
C/2020 S2 (PANSTARRS)17.020.51.61 AU1.78 AU21 Dec 202020.21.76 AU13 Oct 202019.91.03 AU
P/2020 S1 (PANSTARRS)14.021.23.13 AU2.95 AU16 Jan 202121.22.95 AU24 Sep 202020.42.08 AU
C/2020 R7 (ATLAS)7.017.46.30 AU6.28 AU16 Sep 202213.12.96 AU15 Jul 202212.52.18 AU
C/2020 R6 (Rankin)11.022.25.77 AU5.47 AU10 Sep 201918.53.13 AU16 Apr 201918.73.00 AU
P/2020 R5 (PANSTARRS)9.520.63.56 AU3.61 AU28 May 202020.43.41 AU9 Oct 202019.62.51 AU
C/2020 R4 (ATLAS)13.514.22.16 AU1.28 AU1 Mar 202112.71.03 AU23 Apr 202111.00.46 AU
C/2020 R2 (PANSTARRS)9.020.46.05 AU5.65 AU24 Feb 202219.34.69 AU20 Oct 202118.73.83 AU
C/2020 Q2 (PANSTARRS)12.022.16.51 AU5.69 AU6 Feb 202021.95.40 AU5 Aug 202021.24.47 AU
C/2020 Q1 (Borisov)14.018.03.29 AU2.48 AU14 Aug 202013.61.32 AU25 Sep 202012.40.73 AU
C/2020 P4-A (SOHO)5.324.22.52 AU3.18 AU8 Aug 20205.00.09 AU7 Aug 20205.60.91 AU
C/2020 P4-B (SOHO)0.019.52.40 AU3.15 AU8 Aug 20200.40.10 AU7 Aug 20201.00.91 AU
C/2020 P4-C (SOHO)-1.619.82.78 AU3.33 AU6 Aug 20200.40.09 AU9 Aug 20203.20.91 AU
C/2020 P3 (ATLAS)6.018.46.48 AU6.84 AU20 Apr 202118.66.81 AU8 Dec 202018.46.39 AU
C/2020 P1 (NEOWISE)14.016.62.07 AU1.88 AU20 Oct 20206.20.34 AU13 Oct 20206.40.66 AU
P/2020 O3 (PANSTARRS)12.021.64.83 AU4.17 AU29 Jan 202121.74.17 AU22 Aug 202020.73.19 AU
C/2020 O2 (Amaral)8.017.65.89 AU5.17 AU28 Aug 202116.94.86 AU11 Jun 202116.53.89 AU
P/2020 O1 (Lemmon-PANSTARRS)15.522.03.15 AU2.51 AU3 May 202020.72.33 AU27 Jul 202019.91.34 AU
C/2020 N2 (ATLAS)16.021.62.96 AU2.52 AU23 Aug 202018.71.79 AU27 Jul 202017.80.88 AU
C/2020 N1 (PANSTARRS)12.515.21.24 AU1.56 AU12 Mar 202114.61.32 AU3 Feb 202114.81.23 AU

For possible comets still needing confirmation, see http://www.minorplanetcenter.net/iau/NEO/pccp_tabular.html



For each of the listed comets, the current position is plotted in the below all-sky chart:





    Terminology:
            
    delta:      Distance between comet and earth in AU
    radius:     Distance between comet and sun in AU
    magn:       Magnitude (brightness) estimate    
    elong:      Elongation in degrees (angle sun-earth-comet)    
    AU:         Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    Perihelion: On this date the comet (or other type of body) is closest to the sun
    Hₒ:         Absolute magnitude (magnitude from a distance of 1 AU) 
    

Orbital elements provided by MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database).
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.