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
C/2019 Y4 (ATLAS)disintegrated0.79 AU0.30 AU31 May 2020-0.25 AU23 May 2020-0.78 AU
C/2019 U6 (Lemmon)7.11.17 AU1.01 AU18 Jun 20205.10.91 AU29 Jun 20205.20.83 AU
C/2020 F8 (SWAN)7.40.85 AU0.43 AU27 May 20206.90.43 AU12 May 20206.60.56 AU
C/2020 F3 (NEOWISE)8.41.62 AU1.04 AU3 Jul 20201.90.29 AU23 Jul 20204.00.69 AU
C/2017 T2 (PANSTARRS)8.71.66 AU1.64 AU4 May 20208.61.62 AU28 Dec 20199.81.52 AU
C/2019 Y4-B (ATLAS)disintegrated0.79 AU0.30 AU31 May 2020-0.25 AU23 May 2020-0.78 AU
2P/Encke10.11.80 AU0.80 AU25 Jun 20203.60.34 AU30 Jul 20208.40.62 AU
C/2019 Y1 (ATLAS)11.01.27 AU1.51 AU15 Mar 20208.30.84 AU2 May 20209.61.11 AU
58P/Jackson-Neujmin11.12.00 AU1.38 AU27 May 202011.11.38 AU7 Dec 202017.01.64 AU
88P/Howell12.81.10 AU1.87 AU26 Sep 202011.31.35 AU10 May 202013.71.08 AU
29P/Schwassmann-Wachmann13.26.67 AU5.80 AU13 Mar 201913.25.77 AU9 Sep 201812.54.77 AU
210P/Christensen13.31.18 AU1.07 AU7 Apr 202011.50.53 AU7 May 202012.81.08 AU
C/2018 N2 (ASASSN)13.84.17 AU3.65 AU10 Nov 201911.73.12 AU19 Oct 201911.72.21 AU
246P/NEAT14.62.65 AU3.20 AU22 Feb 202113.72.86 AU1 Jul 202113.01.94 AU
C/2018 F4 (PANSTARRS)14.84.18 AU3.79 AU4 Dec 201913.83.44 AU6 May 201914.63.25 AU
C/2019 N1 (ATLAS)15.02.93 AU2.91 AU1 Dec 202012.31.70 AU8 Feb 202112.21.91 AU
C/2017 K2 (PANSTARRS)16.08.82 AU9.09 AU19 Dec 20224.01.80 AU14 Jul 20225.31.81 AU
102P/Shoemaker17.02.15 AU2.76 AU22 Jan 202115.02.07 AU10 Aug 202015.21.53 AU
249P/LINEAR18.30.46 AU0.86 AU29 Jun 202013.60.50 AU8 Jun 202014.00.43 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.