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C/2012 K1 (PANSTARRS)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion22 Aug 20146.91.067 AU1.995 AU 08h56m+09°39'16.8°15.9°261°
Nearest approach29 Oct 20146.81.525 AU0.981 AU 06h00m-47°02'101.1°39.7°304°
Today20 Apr 202625.527.871 AU28.191 AU 21h26m-14°41'70.4°1.9°252°
C/2012 K1 (PANSTARRS)- 2026-04-20
astro.vanbuitenen.nl


 
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The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)


Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 5.2 + 5 log[∆] + 9.1 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)



Charts

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.





The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.




Orbital elements

The orbital elements of C/2012 K1 (PANSTARRS) are: 

    e (Eccentricity)                : 0.9998940
    q (Perihelion distance)         : 1.0669030
    i (Inclination)                 : 142.66900
    Ω (Longitude of ascending node) : 317.79340
    ω (Argument of perihelion)      : 203.20220
    L (Longitude of perihelion)     : 298.97245
    B (Latitude of perihelion)      : -13.82252
    T (Time of perihelion passage)  : 2456891.75230

    Epoch                           : 2026 Apr 19
    Reference                       : MPEC 2026-E44

    Classification(s):              : Nearly isotropic; New (a > 10000 AU)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-04-19 00:00 UT   21 26 01.7   -14 41 32    28.203   27.866   69.4    1.9   252   25.5 
2026-04-20 00:00 UT   21 26 04.1   -14 41 16    28.192   27.871   70.3    1.9   252   25.5 
2026-04-20 00:15 UT   21 26 04.2   -14 41 15    28.191   27.871   70.4    1.9   252   25.5 
2026-04-21 00:00 UT   21 26 06.4   -14 40 60    28.180   27.875   71.3    2.0   252   25.5 
2026-04-22 00:00 UT   21 26 08.6   -14 40 44    28.168   27.880   72.3    2.0   252   25.5 
2026-04-23 00:00 UT   21 26 10.6   -14 40 30    28.157   27.884   73.2    2.0   252   25.5 
2026-04-24 00:00 UT   21 26 12.5   -14 40 15    28.145   27.889   74.2    2.0   252   25.5 
2026-04-25 00:00 UT   21 26 14.3   -14 40 02    28.133   27.893   75.2    2.0   252   25.5 
2026-04-26 00:00 UT   21 26 15.9   -14 39 49    28.121   27.898   76.1    2.0   252   25.5 
2026-04-27 00:00 UT   21 26 17.4   -14 39 37    28.109   27.902   77.1    2.0   252   25.5 
2026-04-28 00:00 UT   21 26 18.8   -14 39 25    28.096   27.907   78.1    2.0   252   25.5 
2026-04-29 00:00 UT   21 26 20.0   -14 39 14    28.084   27.911   79.0    2.0   252   25.5 
2026-04-30 00:00 UT   21 26 21.1   -14 39 04    28.072   27.916   80.0    2.0   252   25.5 




    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet 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.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.

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