Bright comets in the coming 3 months

The below table lists all comets that are expected to become brighter than magnitude 15 in the coming 3 months.
For detailed information about a comet, click on its designation.

Comet(s) Today Perihelion Nearest approach
designation magn delta radius date magn radius date magn delta
45P/Honda-Mrkos-Pajdusakova6.91.52 AU0.70 AU26 Apr 20224.90.56 AU10 May 20225.91.51 AU
C/2017 K2 (PANSTARRS)9.52.46 AU3.16 AU19 Dec 20227.71.80 AU14 Jul 20228.31.81 AU
C/2021 E3 (ZTF)10.01.29 AU1.81 AU11 Jun 20229.81.78 AU31 May 20229.81.21 AU
C/2019 L3 (ATLAS)10.94.25 AU3.74 AU9 Jan 20229.43.55 AU6 Jan 20229.42.58 AU
C/2021 O3 (PANSTARRS)disintegrated0.66 AU0.80 AU21 Apr 2022-0.29 AU8 May 2022-0.60 AU
C/2021 F1 (Lemmon-PANSTARRS)11.52.08 AU1.21 AU6 Apr 20229.21.00 AU12 Feb 202211.71.41 AU
C/2021 P4 (ATLAS)12.02.19 AU1.59 AU30 Jul 20229.41.08 AU13 Jul 20229.51.96 AU
22P/Kopff12.01.86 AU1.67 AU18 Mar 202211.51.55 AU14 Sep 202214.41.38 AU
C/2019 T4 (ATLAS)12.13.60 AU4.25 AU9 Jun 202212.24.24 AU4 Apr 202211.93.33 AU
19P/Borrelly13.22.21 AU1.78 AU1 Feb 20228.91.31 AU11 Dec 20219.81.17 AU
C/2020 V2 (ZTF)13.54.50 AU4.38 AU8 May 20239.62.23 AU17 Sep 20239.31.85 AU
C/2021 A1 (Leonard)disintegrated1.65 AU2.42 AU3 Jan 20225.50.62 AU12 Dec 20212.50.23 AU
116P/Wild13.72.00 AU2.24 AU16 Jul 202214.02.20 AU23 Feb 202213.81.44 AU
9P/Tempel13.81.39 AU1.70 AU4 Mar 202213.61.54 AU28 Jul 202214.81.15 AU
C/2020 R7 (ATLAS)14.02.87 AU3.19 AU16 Sep 202213.82.96 AU15 Jul 202213.22.18 AU
C/2019 U5 (PANSTARRS)14.14.04 AU4.58 AU29 Mar 202312.23.62 AU24 Mar 202312.22.63 AU
117P/Helin-Roman-Alu14.22.29 AU3.05 AU7 Jul 202213.93.04 AU2 Jul 202213.92.03 AU
C/2020 K1 (PANSTARRS)14.33.97 AU4.55 AU9 May 202311.63.07 AU9 Jun 202311.52.47 AU
C/2021 T2 (Fuls)14.51.89 AU1.29 AU7 Jun 202213.81.25 AU6 Jul 202213.51.14 AU
C/2020 Y2 (ATLAS)14.73.23 AU3.15 AU17 Jun 202214.83.13 AU19 Mar 202214.62.92 AU
29P/Schwassmann-Wachmann14.86.90 AU5.99 AU9 Apr 201914.65.77 AU9 Sep 201813.94.78 AU
67P/Churyumov-Gerasimenko14.92.34 AU2.46 AU2 Nov 20218.11.21 AU12 Nov 20218.10.42 AU
157P/Tritton15.12.81 AU1.94 AU9 Sep 202213.41.57 AU10 Feb 202313.91.27 AU
C/2022 E3 (ZTF)15.23.08 AU3.47 AU12 Jan 20237.11.11 AU1 Feb 20235.30.28 AU
73P/Schwassmann-Wachmann15.81.39 AU1.64 AU25 Aug 202212.10.97 AU22 Sep 202212.40.97 AU
81P/Wild16.13.41 AU2.49 AU15 Dec 202211.01.60 AU18 May 202312.61.22 AU
51P-A/Harrington17.71.68 AU2.13 AU3 Oct 202214.11.69 AU3 Sep 202214.00.73 AU
255P/Levy18.52.42 AU1.76 AU7 Sep 202214.40.85 AU16 Aug 202214.61.53 AU
41P/Tuttle-Giacobini-Kresak19.92.53 AU1.80 AU13 Sep 202212.11.05 AU21 Sep 202212.21.96 AU


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
    

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.