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 A6 (Lemmon-PANSTARRS)16.020.61.50 AU2.37 AU29 Aug 201820.81.94 AU9 Jan 201920.51.49 AU
C/2019 A5 (PANSTARRS)10.021.14.95 AU5.82 AU13 Oct 201719.84.54 AU5 Jan 201819.63.97 AU
P/2019 A4 (PANSTARRS)15.019.41.38 AU2.36 AU29 Nov 201819.82.36 AU12 Jan 201919.41.38 AU
P/2019 A3 (PANSTARRS)9.021.92.38 AU2.51 AU1 Aug 201820.92.31 AU9 Oct 201820.41.35 AU
P/2019 A2 (ATLAS)10.518.12.59 AU3.56 AU1 Dec 201818.33.55 AU14 Jan 201918.12.59 AU
P/2019 A1 (PANSTARRS)16.020.61.49 AU2.37 AU11 Oct 201821.32.21 AU3 Feb 201920.71.46 AU
P/2018 Y2 (Africano)11.519.72.94 AU3.88 AU20 Dec 201819.73.87 AU1 Jan 201919.72.89 AU
C/2018 Y1 (Iwamoto)11.59.30.99 AU1.32 AU6 Feb 20197.71.29 AU13 Feb 20197.20.30 AU
C/2018 X3 (PANSTARRS)14.520.31.99 AU2.70 AU30 Dec 201820.12.70 AU9 Dec 201820.01.73 AU
C/2018 X2 (Fitzsimmons)12.018.32.24 AU2.88 AU8 Jul 201917.72.13 AU7 Jan 201918.52.23 AU
C/2018 W2 (Africano)9.516.62.85 AU3.29 AU6 Sep 201910.41.45 AU28 Sep 20199.40.49 AU
C/2018 W115.718.61.86 AU2.05 AU11 May 201917.81.36 AU11 Dec 201818.71.65 AU
C/2018 V4 (Africano)12.519.72.61 AU3.22 AU1 Mar 201920.13.20 AU14 Dec 201819.52.38 AU
A/2018 V312.020.43.16 AU3.32 AU8 Sep 201916.61.34 AU19 Aug 201913.70.38 AU
C/2018 V2 (ATLAS)14.520.82.87 AU2.54 AU26 Nov 201819.62.47 AU8 Nov 201819.41.55 AU
P/2018 VN2 (Leonard)15.021.02.11 AU2.74 AU7 Jun 201820.42.11 AU11 Nov 201819.81.50 AU
C/2018 V1 (Machholz-Fujikawa-Iwamoto)12.012.92.13 AU1.16 AU3 Dec 20186.00.39 AU27 Nov 20186.10.67 AU
C/2018 U1 (Lemmon)5.019.39.23 AU8.88 AU31 Oct 202115.84.99 AU18 Jun 202115.24.13 AU
C/2018 R5 (Lemmon)11.520.34.29 AU3.62 AU9 Jan 201920.23.62 AU28 Sep 201819.52.82 AU
C/2018 R4 (Fuls)14.023.04.31 AU4.11 AU3 Mar 201817.91.71 AU21 Aug 201819.51.95 AU
C/2018 R3 (Lemmon)11.517.73.13 AU2.35 AU7 Jun 201914.11.29 AU24 May 201914.11.92 AU
C/2018 P5 (PANSTARRS)11.021.45.32 AU4.58 AU26 Feb 201921.54.58 AU22 Aug 201820.83.73 AU
P/2018 P4 (PANSTARRS)12.020.84.08 AU3.69 AU7 Nov 201820.13.67 AU16 Sep 201819.82.67 AU
P/2018 P3 (PANSTARRS)14.518.61.78 AU1.94 AU9 Oct 201816.51.76 AU22 Sep 201816.40.78 AU
C/2018 O1 (ATLAS)17.022.92.67 AU2.38 AU31 Aug 201819.51.56 AU1 Aug 201818.30.70 AU
C/2018 N2 (ASASSN)6.013.24.47 AU4.19 AU11 Nov 20199.23.12 AU20 Oct 20199.12.21 AU
C/2018 N1 (NEOWISE)15.517.12.83 AU2.68 AU1 Aug 20189.61.31 AU27 Jul 20189.10.31 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.