C/2020 F2 (ATLAS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	19 Apr 2022	18.0	8.827 AU	7.845 AU	14h00m	+01°17'	167.2°	1.4°	193°
Perihelion	12 Jul 2022	18.2	8.814 AU	8.805 AU	13h19m	+04°45'	87.2°	6.6°	112°
Today	29 Jan 2026	19.8	11.468 AU	10.556 AU	10h16m	+29°09'	156.9°	1.9°	246°

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 4.1 + 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 F2 (ATLAS) are:

    e (Eccentricity)                : 1.0016620
    q (Perihelion distance)         : 8.8139840
    i (Inclination)                 : 163.59000
    Ω (Longitude of ascending node) : 250.29490
    ω (Argument of perihelion)      : 48.22350
    L (Longitude of perihelion)     : 203.25771
    B (Latitude of perihelion)      : 12.16225
    T (Time of perihelion passage)  : 2459772.50920

    Epoch                           : 2026 Jan 28
    Reference                       : MPEC 2025-X35

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-01-28 00:00 UT   10 17 32.1   +29 03 32    10.559   11.462  155.4    2.1   250   19.8 
2026-01-29 00:00 UT   10 17 00.9   +29 06 39    10.557   11.465  156.2    2.0   248   19.8 
2026-01-29 21:15 UT   10 16 33.1   +29 09 24    10.556   11.468  156.9    1.9   246   19.8 
2026-01-30 00:00 UT   10 16 29.5   +29 09 45    10.555   11.469  157.0    1.9   245   19.8 
2026-01-31 00:00 UT   10 15 57.9   +29 12 50    10.554   11.472  157.7    1.9   243   19.8 
2026-02-01 00:00 UT   10 15 26.1   +29 15 53    10.554   11.475  158.4    1.8   241   19.8 
2026-02-02 00:00 UT   10 14 54.1   +29 18 55    10.553   11.479  159.0    1.8   238   19.8 
2026-02-03 00:00 UT   10 14 22.0   +29 21 55    10.553   11.482  159.7    1.7   235   19.8 
2026-02-04 00:00 UT   10 13 49.6   +29 24 53    10.553   11.486  160.2    1.7   232   19.8 
2026-02-05 00:00 UT   10 13 17.2   +29 27 50    10.554   11.489  160.8    1.6   229   19.8 
2026-02-06 00:00 UT   10 12 44.6   +29 30 45    10.555   11.493  161.2    1.6   226   19.8 
2026-02-07 00:00 UT   10 12 11.8   +29 33 38    10.556   11.496  161.7    1.5   223   19.8 
2026-02-08 00:00 UT   10 11 39.0   +29 36 29    10.557   11.500  162.0    1.5   219   19.8 

    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.