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
C/2017 O1 (ASASSN1)9.70.81 AU1.52 AU14 Oct 20178.41.50 AU18 Oct 20178.40.72 AU
C/2015 V2 (Johnson)10.92.24 AU2.14 AU12 Jun 20178.01.64 AU5 Jun 20178.00.81 AU
96P/Machholz11.81.04 AU0.98 AU27 Oct 20172.20.12 AU23 Oct 20175.20.88 AU
C/2015 ER61 (PANSTARRS)11.81.66 AU2.34 AU9 May 20177.71.04 AU19 Apr 20177.81.18 AU
C/2016 R2 (PANSTARRS)12.13.22 AU3.50 AU9 May 201810.82.60 AU23 Dec 201710.42.05 AU
29P/Schwassmann-Wachmann12.65.09 AU5.82 AU14 Mar 201913.15.77 AU9 Sep 201812.44.77 AU
24P/Schaumasse12.81.70 AU1.39 AU16 Nov 201710.81.21 AU21 Apr 201817.81.33 AU
217P/LINEAR12.91.48 AU1.52 AU16 Jul 201711.81.24 AU15 Dec 201714.51.30 AU
65P/Gunn13.23.10 AU2.91 AU16 Oct 201713.42.91 AU30 May 201712.51.98 AU
71P/Clark13.31.31 AU1.78 AU30 Jun 201710.61.59 AU11 Jun 201710.60.59 AU
213P/Van Ness13.41.46 AU1.98 AU24 Sep 201713.41.98 AU18 Jul 201712.91.05 AU
C/2016 N4 (MASTER)13.52.77 AU3.20 AU16 Sep 201713.53.20 AU21 Sep 201713.52.76 AU
C/2015 VL62 (Lemmon-Yeung-PANSTARRS)13.92.16 AU2.74 AU28 Aug 201713.52.72 AU21 Aug 201713.51.74 AU
240P/NEAT14.11.88 AU2.75 AU15 May 201814.12.13 AU3 Oct 201714.01.88 AU
C/2016 M1 (PANSTARRS)14.34.19 AU4.08 AU10 Aug 20189.72.21 AU25 Jun 20189.21.29 AU
C/2016 N6 (PANSTARRS)14.84.38 AU4.01 AU18 Jul 201810.92.67 AU24 Dec 201811.32.37 AU
62P/Tsuchinshan15.11.67 AU1.50 AU16 Nov 201713.71.38 AU16 Mar 201816.51.02 AU
185P/Petriew18.41.79 AU1.87 AU27 Jan 201811.30.93 AU17 Feb 201811.71.33 AU

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

    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).
UCAC4 star catalog and NGC2000 dso catalog via VizieR as provided by the Strasbourg astronomical Data Center.
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.