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
P/2019 V2 (Groeller)10.020.64.78 AU5.21 AU3 Oct 202020.95.05 AU20 Mar 202120.14.11 AU
C/2019 V1 (Borisov)11.019.02.78 AU3.75 AU16 Jul 202018.93.10 AU30 Dec 201918.82.70 AU
A/2019 U612.819.62.24 AU3.02 AU19 Jun 202016.70.92 AU29 Jun 202016.60.84 AU
A/2019 U510.020.610.43 AU10.09 AU7 Apr 202315.53.64 AU26 Mar 202315.12.65 AU
P/2019 U4 (PANSTARRS)19.022.21.10 AU1.98 AU18 Sep 201921.81.85 AU27 Oct 201921.50.90 AU
P/2019 T6 (PANSTARRS)15.519.11.22 AU2.07 AU7 Nov 201918.82.05 AU5 Nov 201918.81.09 AU
P/2019 T5 (ATLAS)15.020.02.11 AU2.18 AU1 Aug 201918.61.53 AU29 Jan 202020.72.05 AU
C/2019 T4 (ATLAS)5.018.67.70 AU8.21 AU9 Jun 202214.24.24 AU5 Apr 202213.93.33 AU
C/2019 T3 (ATLAS)6.818.06.20 AU6.72 AU2 Mar 202117.55.95 AU11 Sep 202117.25.37 AU
A/2019 T212.520.75.55 AU5.50 AU22 Apr 202118.02.65 AU11 Jun 202117.82.47 AU
A/2019 T113.020.85.38 AU5.27 AU14 Jan 202120.14.28 AU21 May 202119.83.88 AU
A/2019 S414.520.63.04 AU3.62 AU7 Apr 202021.03.44 AU25 Nov 201920.63.01 AU
P/2019 S3 (PANSTARRS)18.321.81.22 AU2.02 AU26 Aug 201921.01.81 AU12 Oct 201920.70.89 AU
P/2019 S2 (PANSTARRS)13.522.43.96 AU3.93 AU20 Feb 201922.63.76 AU28 Aug 201921.62.84 AU
2I/Borisov11.015.11.99 AU2.01 AU8 Dec 201915.12.01 AU28 Dec 201915.11.94 AU
C/2019 Q3 (PANSTARRS)8.522.08.13 AU7.85 AU20 Aug 201821.17.25 AU13 Aug 201821.16.35 AU
A/2019 Q218.022.43.19 AU2.33 AU22 Jul 201920.31.26 AU28 Aug 201917.50.43 AU
A/2019 Q112.520.14.89 AU5.28 AU19 Jul 202019.85.00 AU3 Sep 202019.44.09 AU
A/2019 O415.521.74.02 AU3.68 AU9 Feb 202021.73.64 AU6 Sep 201921.13.04 AU
A/2019 O310.020.09.80 AU9.20 AU6 Mar 202119.88.82 AU24 Jul 202019.68.27 AU
A/2019 O29.520.311.34 AU11.40 AU7 Apr 202319.59.68 AU17 May 202319.59.05 AU
C/2019 N1 (ATLAS)7.516.84.46 AU4.47 AU1 Dec 202011.31.70 AU8 Feb 202111.31.91 AU
C/2019 M3 (ATLAS)12.220.74.55 AU4.28 AU3 Jan 201916.92.42 AU18 Dec 201816.82.43 AU
P/2019 M2 (ATLAS)21.224.51.73 AU2.21 AU22 Jun 201916.71.06 AU17 Jun 201916.70.21 AU
C/2019 LB7 (Kleyna)17.025.64.12 AU3.59 AU27 Mar 201923.62.48 AU4 Dec 201822.71.82 AU
C/2019 L3 (ATLAS)4.517.17.13 AU7.29 AU9 Jan 202211.83.55 AU7 Jan 202211.82.58 AU
C/2019 L2 (NEOWISE)16.024.54.29 AU3.38 AU1 Apr 201920.21.62 AU10 Jul 201919.61.27 AU
C/2019 L1 (PANSTARRS)13.520.43.40 AU3.06 AU11 Aug 201918.92.89 AU23 Jul 201918.81.89 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.