Bright comets in the coming 3 months

The below table lists all comets that are expected to become brighter than magnitude 14 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
29P/Schwassmann-Wachmann12.36.44 AU5.77 AU7 Mar 201913.25.77 AU9 Sep 201812.44.77 AU
C/2017 M4 (ATLAS)12.82.48 AU3.45 AU18 Jan 201914.13.25 AU14 May 201913.32.48 AU
C/2016 M1 (PANSTARRS)12.84.16 AU3.77 AU10 Aug 20189.22.21 AU25 Jun 20188.61.29 AU
C/2018 N2 (ASASSN)13.54.40 AU3.56 AU11 Nov 201911.63.12 AU20 Oct 201911.52.21 AU
C/2018 A6 (Gibbs)13.82.93 AU3.06 AU14 Jul 201914.33.02 AU17 Mar 201914.32.72 AU
C/2019 D1 (Flewelling)13.91.57 AU1.58 AU11 May 201914.51.58 AU10 Sep 201915.91.52 AU
78P/Gehrels13.93.06 AU2.05 AU2 Apr 201913.72.01 AU6 Sep 201814.61.63 AU
C/2017 T2 (PANSTARRS)14.15.43 AU4.44 AU4 May 20205.61.61 AU29 Dec 20197.51.52 AU
C/2018 R3 (Lemmon)14.11.93 AU1.33 AU7 Jun 201914.01.29 AU24 May 201914.01.92 AU
C/2018 W2 (Africano)14.62.65 AU2.10 AU5 Sep 201910.91.45 AU27 Sep 20199.80.49 AU
P/2008 Y12 (SOHO)15.02.21 AU2.65 AU9 Oct 2019-2.50.07 AU18 Aug 20199.70.69 AU
68P/Klemola16.51.58 AU2.47 AU9 Nov 201913.81.79 AU13 Jul 201914.61.25 AU
A/2018 V319.12.93 AU2.09 AU8 Sep 201916.61.34 AU19 Aug 201913.70.38 AU
289P/Blanpain23.12.62 AU2.64 AU20 Dec 201912.70.96 AU11 Jan 202011.60.09 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.