C/2020 K5 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	19 May 2021	13.9	1.557 AU	1.573 AU	01h44m	-45°12'	70.3°	37.7°	210°
Perihelion	3 Jun 2021	13.9	1.542 AU	1.612 AU	03h10m	-41°13'	67.5°	37.4°	204°
Today	6 Mar 2026	28.4	14.523 AU	14.195 AU	06h31m	+52°50'	107.4°	3.7°	104°

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)                : 1.0007080
    q (Perihelion distance)         : 1.5415280
    i (Inclination)                 : 67.07020
    Ω (Longitude of ascending node) : 86.14280
    ω (Argument of perihelion)      : 249.64460
    L (Longitude of perihelion)     : 132.54304
    B (Latitude of perihelion)      : -59.70849
    T (Time of perihelion passage)  : 2459369.41790

    Epoch                           : 2025 Nov 12
    Reference                       : MPEC 2021-R75

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-03-05 00:00 UT   06 31 20.9   +52 52 05    14.170   14.515  108.5    3.7   105   28.4 
2026-03-06 00:00 UT   06 31 12.0   +52 50 41    14.190   14.521  107.6    3.7   104   28.4 
2026-03-06 06:30 UT   06 31 09.6   +52 50 18    14.195   14.523  107.4    3.7   104   28.4 
2026-03-07 00:00 UT   06 31 03.5   +52 49 15    14.210   14.527  106.7    3.8   103   28.4 
2026-03-08 00:00 UT   06 30 55.6   +52 47 50    14.230   14.533  105.9    3.8   103   28.4 
2026-03-09 00:00 UT   06 30 48.1   +52 46 23    14.250   14.539  105.0    3.8   102   28.4 
2026-03-10 00:00 UT   06 30 41.2   +52 44 56    14.271   14.545  104.1    3.8   102   28.4 
2026-03-11 00:00 UT   06 30 34.7   +52 43 28    14.291   14.552  103.2    3.8   101   28.4 
2026-03-12 00:00 UT   06 30 28.6   +52 41 60    14.312   14.558  102.4    3.8   101   28.4 
2026-03-13 00:00 UT   06 30 23.1   +52 40 31    14.332   14.564  101.5    3.8   100   28.4 
2026-03-14 00:00 UT   06 30 18.0   +52 39 01    14.353   14.570  100.6    3.8   100   28.4 
2026-03-15 00:00 UT   06 30 13.4   +52 37 31    14.374   14.576   99.8    3.9    99   28.4 
2026-03-16 00:00 UT   06 30 09.3   +52 36 01    14.394   14.582   98.9    3.9    98   28.4 

    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.