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°18'	167.2°	1.4°	193°
Perihelion	11 Jul 2022	18.2	8.814 AU	8.804 AU	13h19m	+04°46'	87.3°	6.6°	112°
Today	18 Mar 2026	19.9	11.633 AU	10.862 AU	09h51m	+30°53'	139.1°	3.2°	131°

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)                : 1.0014590
    q (Perihelion distance)         : 8.8142470
    i (Inclination)                 : 163.59020
    Ω (Longitude of ascending node) : 250.29320
    ω (Argument of perihelion)      : 48.22150
    L (Longitude of perihelion)     : 203.25799
    B (Latitude of perihelion)      : 12.16172
    T (Time of perihelion passage)  : 2459772.40250

    Epoch                           : 2026 Mar 16
    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
2026-03-17 00:00 UT   09 51 38.4   +30 52 24    10.847   11.629  140.2    3.1   132   19.9 
2026-03-18 00:00 UT   09 51 09.0   +30 53 33    10.860   11.632  139.2    3.2   131   19.9 
2026-03-18 02:28 UT   09 51 06.0   +30 53 39    10.862   11.633  139.1    3.2   131   19.9 
2026-03-19 00:00 UT   09 50 39.8   +30 54 38    10.874   11.636  138.2    3.3   130   19.9 
2026-03-20 00:00 UT   09 50 10.9   +30 55 40    10.888   11.639  137.3    3.3   130   19.9 
2026-03-21 00:00 UT   09 49 42.3   +30 56 39    10.903   11.643  136.3    3.4   129   19.9 
2026-03-22 00:00 UT   09 49 14.0   +30 57 35    10.917   11.647  135.3    3.5   128   19.9 
2026-03-23 00:00 UT   09 48 46.1   +30 58 28    10.932   11.650  134.3    3.5   127   19.9 
2026-03-24 00:00 UT   09 48 18.4   +30 59 18    10.947   11.654  133.3    3.6   127   19.9 
2026-03-25 00:00 UT   09 47 51.1   +31 00 06    10.963   11.657  132.3    3.6   126   19.9 
2026-03-26 00:00 UT   09 47 24.1   +31 00 50    10.978   11.661  131.3    3.7   126   19.9 
2026-03-27 00:00 UT   09 46 57.4   +31 01 31    10.994   11.664  130.3    3.7   125   19.9 
2026-03-28 00:00 UT   09 46 31.1   +31 02 10    11.010   11.668  129.3    3.8   124   19.9 

    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.