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
C/2021 D2 (ZTF)9.018.44.46 AU4.13 AU4 Feb 202215.72.94 AU8 Feb 202215.72.53 AU
C/2021 D1 (SWAN)13.012.21.82 AU1.17 AU27 Feb 202110.90.90 AU15 Mar 202111.11.68 AU
C/2021 C6 (Lemmon)12.020.23.00 AU3.85 AU13 Nov 202119.73.27 AU13 Jan 202219.12.36 AU
C/2021 C5 (PANSTARRS)9.021.26.22 AU6.69 AU10 Feb 202316.83.24 AU21 Jun 202316.62.80 AU
C/2021 C4 (ATLAS)9.018.43.66 AU4.56 AU18 Jan 202119.04.51 AU22 Apr 202118.43.63 AU
C/2021 C3 (Catalina)14.018.81.63 AU2.37 AU12 Feb 202118.72.28 AU14 Mar 202118.21.33 AU
P/2021 C2 (PANSTARRS)12.022.14.39 AU4.90 AU27 Feb 202121.94.89 AU12 Feb 202121.93.99 AU
C/2021 C1 (Rankin)11.519.32.72 AU3.67 AU7 Dec 202020.03.48 AU24 Mar 202119.22.63 AU
C/2021 B3 (NEOWISE)13.518.92.52 AU2.19 AU10 Mar 202118.42.16 AU14 Feb 202118.21.87 AU
C/2021 B2 (PANSTARRS)14.020.42.97 AU2.53 AU4 May 202120.52.51 AU16 Dec 202020.52.31 AU
C/2021 A10 (NEOWISE)19.021.82.01 AU1.33 AU15 Mar 202120.61.27 AU10 Feb 202119.20.58 AU
C/2021 A9 (PANSTARRS)6.020.79.05 AU9.71 AU2 Dec 202319.17.76 AU4 Jan 202419.16.80 AU
C/2021 A7 (NEOWISE)10.015.22.14 AU2.28 AU15 Jul 202115.21.97 AU5 Apr 202115.32.14 AU
C/2021 A6 (PANSTARRS)7.020.37.20 AU7.93 AU3 May 202120.47.93 AU4 Mar 202120.26.97 AU
P/2021 A5 (PANSTARRS)15.022.03.43 AU2.69 AU11 Nov 202020.42.62 AU13 Oct 202020.31.68 AU
C/2021 A4 (NEOWISE)16.014.81.62 AU1.20 AU20 Mar 202113.81.15 AU12 Feb 202112.20.43 AU
C/2021 A2 (NEOWISE)13.518.02.01 AU1.79 AU22 Jan 202111.41.41 AU3 Feb 202111.10.51 AU
C/2021 A1 (Leonard)8.517.73.60 AU4.04 AU3 Jan 202210.30.62 AU13 Dec 20215.60.23 AU
C/2020 Y3 (ATLAS)13.518.81.80 AU2.51 AU3 Dec 202018.62.00 AU11 Mar 202118.21.60 AU
C/2020 Y2 (ATLAS)6.516.64.09 AU5.07 AU17 Jun 202214.13.13 AU20 Mar 202213.92.92 AU
C/2020 X4 (Leonard)9.020.26.04 AU5.32 AU11 Nov 202019.75.21 AU27 Aug 202119.84.61 AU
C/2020 X3 (SOHO)15.024.42.84 AU2.63 AU14 Dec 2020-1.10.01 AU6 Jan 202116.00.55 AU
C/2020 X2 (ATLAS)10.619.64.01 AU3.99 AU15 Nov 202018.93.83 AU30 Dec 202018.72.86 AU
P/2020 X1 (ATLAS)13.021.13.95 AU3.27 AU21 Jul 202020.02.87 AU5 Nov 202019.21.97 AU
C/2020 W5 (Lemmon)15.023.64.03 AU3.58 AU30 Nov 202022.33.36 AU2 Dec 202022.32.51 AU
P/2020 W1 (Rankin)10.021.46.25 AU5.47 AU4 Apr 202021.25.29 AU7 Oct 201920.54.35 AU
P/2020 V4 (Rankin)9.019.95.60 AU5.17 AU18 Jul 202120.05.15 AU17 Jan 202219.34.29 AU
P/2020 V3 (PANSTARRS)8.320.46.63 AU6.23 AU7 Feb 202120.06.23 AU13 Dec 202019.95.33 AU
C/2020 V2 (ZTF)4.916.96.83 AU7.54 AU8 May 202310.02.23 AU17 Sep 20239.61.86 AU
C/2020 U5 (PANSTARRS)8.018.65.19 AU5.00 AU27 Apr 202216.83.76 AU28 Dec 202116.63.39 AU
C/2020 U4 (PANSTARRS)7.018.86.42 AU5.98 AU7 Apr 202218.25.35 AU30 Nov 202117.64.47 AU
C/2020 U3 (Rankin)15.021.23.06 AU2.39 AU5 Feb 202120.52.28 AU18 Oct 202020.51.87 AU
P/2020 U2 (PANSTARRS)18.016.72.24 AU2.07 AU25 Dec 202014.61.85 AU14 Nov 202014.30.91 AU
C/2020 T5 (Lemmon)16.023.53.77 AU2.89 AU9 Oct 202020.11.89 AU14 Jun 202020.81.64 AU
C/2020 T4 (PANSTARRS)13.018.53.09 AU2.40 AU5 Jul 202117.82.19 AU1 Dec 202019.02.35 AU
P/2020 T3 (PANSTARRS)18.019.81.77 AU1.68 AU20 Jan 202118.21.44 AU26 Oct 202018.20.82 AU
C/2020 T2 (Palomar)11.012.11.49 AU2.32 AU11 Jul 202110.92.05 AU12 May 202111.21.41 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.