C/2019 F1 (ATLAS-Africano)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	20 Jun 2021	14.5	3.607 AU	3.068 AU	23h23m	-83°17'	114.2°	14.9°	275°
Nearest approach	21 Jun 2021	14.5	3.607 AU	3.068 AU	23h27m	-83°25'	114.3°	14.9°	276°
Today	11 Mar 2026	21.0	13.152 AU	13.767 AU	02h22m	+20°47'	50.1°	3.3°	66°

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 8.9 + 5 log[∆] + 5.8 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/2019 F1 (ATLAS-Africano) are:

    e (Eccentricity)                : 0.9998480
    q (Perihelion distance)         : 3.6068340
    i (Inclination)                 : 54.28050
    Ω (Longitude of ascending node) : 38.66770
    ω (Argument of perihelion)      : 251.26560
    L (Longitude of perihelion)     : 98.51459
    B (Latitude of perihelion)      : -50.25246
    T (Time of perihelion passage)  : 2459386.21840

    Epoch                           : 2026 Mar 10
    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
2026-03-10 00:00 UT   02 22 01.6   +20 46 11    13.743   13.145   51.2    3.4    66   21.0 
2026-03-11 00:00 UT   02 22 14.5   +20 47 35    13.762   13.151   50.3    3.3    66   21.0 
2026-03-11 05:18 UT   02 22 17.3   +20 47 54    13.767   13.152   50.1    3.3    66   21.0 
2026-03-12 00:00 UT   02 22 27.5   +20 49 00    13.781   13.157   49.4    3.3    66   21.0 
2026-03-13 00:00 UT   02 22 40.7   +20 50 27    13.800   13.162   48.5    3.2    65   21.0 
2026-03-14 00:00 UT   02 22 54.1   +20 51 55    13.818   13.168   47.5    3.2    65   21.0 
2026-03-15 00:00 UT   02 23 07.7   +20 53 23    13.837   13.174   46.6    3.1    65   21.0 
2026-03-16 00:00 UT   02 23 21.5   +20 54 53    13.855   13.179   45.7    3.1    65   21.0 
2026-03-17 00:00 UT   02 23 35.5   +20 56 24    13.873   13.185   44.7    3.0    65   21.0 
2026-03-18 00:00 UT   02 23 49.6   +20 57 56    13.890   13.191   43.8    3.0    64   21.0 
2026-03-19 00:00 UT   02 24 03.9   +20 59 29    13.908   13.197   42.9    2.9    64   21.0 
2026-03-20 00:00 UT   02 24 18.3   +21 01 03    13.925   13.202   42.0    2.9    64   21.0 
2026-03-21 00:00 UT   02 24 32.9   +21 02 38    13.942   13.208   41.1    2.8    64   21.0 

    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.