C/2020 K5 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	18 May 2021	13.9	1.558 AU	1.578 AU	01h44m	-45°06'	70.1°	37.6°	209°
Perihelion	3 Jun 2021	13.9	1.543 AU	1.617 AU	03h08m	-41°11'	67.3°	37.4°	204°
Today	31 Oct 2026	29.0	15.939 AU	15.574 AU	07h23m	+53°36'	109.8°	3.4°	267°

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. The light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (11.0 + 5 log[∆] + 10.0 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/2020 K5 (PANSTARRS) are:

    e (Eccentricity)                : 1.0005890
    q (Perihelion distance)         : 1.5425610
    i (Inclination)                 : 67.08520
    Ω (Longitude of ascending node) : 86.15270
    ω (Argument of perihelion)      : 249.64210
    L (Longitude of perihelion)     : 132.53140
    B (Latitude of perihelion)      : -59.71776
    T (Time of perihelion passage)  : 2459368.91530

    Epoch                           : 2026 May 29
    Reference                       : MPC194167

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-10-30 00:00 UT   07 23 44.5   +53 32 60    15.586   15.931  108.6    3.4   268   29.0 
2026-10-31 00:00 UT   07 23 37.7   +53 35 22    15.578   15.936  109.4    3.4   267   29.0 
2026-10-31 11:27 UT   07 23 34.4   +53 36 29    15.574   15.939  109.8    3.4   267   29.0 
2026-11-01 00:00 UT   07 23 30.6   +53 37 44    15.570   15.942  110.3    3.3   267   29.0 
2026-11-02 00:00 UT   07 23 23.0   +53 40 05    15.563   15.948  111.1    3.3   266   29.0 
2026-11-03 00:00 UT   07 23 14.9   +53 42 27    15.556   15.954  112.0    3.3   265   29.0 
2026-11-04 00:00 UT   07 23 06.4   +53 44 49    15.548   15.960  112.8    3.3   265   29.0 
2026-11-05 00:00 UT   07 22 57.5   +53 47 10    15.541   15.965  113.7    3.3   264   29.0 
2026-11-06 00:00 UT   07 22 48.1   +53 49 31    15.534   15.971  114.5    3.2   263   29.0 
2026-11-07 00:00 UT   07 22 38.3   +53 51 52    15.527   15.977  115.3    3.2   263   29.0 
2026-11-08 00:00 UT   07 22 28.1   +53 54 12    15.520   15.983  116.2    3.2   262   29.0 
2026-11-09 00:00 UT   07 22 17.4   +53 56 32    15.514   15.988  117.0    3.2   261   29.0 
2026-11-10 00:00 UT   07 22 06.3   +53 58 51    15.507   15.994  117.8    3.1   261   29.0 

    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.