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C/2019 F1 (ATLAS-Africano)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion20 Jun 202114.53.605 AU3.067 AU 23h23m-83°17'114.2°14.9°275°
Nearest approach21 Jun 202114.53.605 AU3.067 AU 23h27m-83°26'114.2°14.9°275°
Today5 Sep 202620.914.159 AU13.725 AU 02h54m+25°55'113.6°3.7°249°
C/2019 F1 (ATLAS-Africano)- 2026-09-05
astro.vanbuitenen.nl


 
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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 9.2 + 5 log[∆] + 5.2 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)                : 0.9996580
    q (Perihelion distance)         : 3.6050780
    i (Inclination)                 : 54.30290
    Ω (Longitude of ascending node) : 38.67230
    ω (Argument of perihelion)      : 251.23710
    L (Longitude of perihelion)     : 98.46495
    B (Latitude of perihelion)      : -50.26019
    T (Time of perihelion passage)  : 2459386.08330

    Epoch                           : 2026 Sep 04
    Reference                       : MPC194160

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-09-04 00:00 UT   02 54 19.8   +25 54 25    13.739   14.150  112.1    3.8   249   20.9 
2026-09-05 00:00 UT   02 54 12.6   +25 55 14    13.730   14.156  113.1    3.8   249   20.9 
2026-09-05 12:26 UT   02 54 08.7   +25 55 39    13.725   14.159  113.6    3.7   249   20.9 
2026-09-06 00:00 UT   02 54 05.1   +25 56 02    13.720   14.162  114.1    3.7   249   20.9 
2026-09-07 00:00 UT   02 53 57.3   +25 56 48    13.711   14.167  115.0    3.7   249   20.9 
2026-09-08 00:00 UT   02 53 49.1   +25 57 32    13.701   14.173  116.0    3.7   249   20.9 
2026-09-09 00:00 UT   02 53 40.8   +25 58 15    13.692   14.178  117.0    3.6   248   20.9 
2026-09-10 00:00 UT   02 53 32.1   +25 58 57    13.683   14.184  118.0    3.6   248   20.9 
2026-09-11 00:00 UT   02 53 23.1   +25 59 37    13.674   14.189  119.0    3.6   248   20.9 
2026-09-12 00:00 UT   02 53 13.9   +26 00 16    13.665   14.195  119.9    3.5   248   20.9 
2026-09-13 00:00 UT   02 53 04.4   +26 00 54    13.657   14.201  120.9    3.5   247   20.9 
2026-09-14 00:00 UT   02 52 54.6   +26 01 30    13.648   14.206  121.9    3.4   247   20.9 
2026-09-15 00:00 UT   02 52 44.5   +26 02 04    13.640   14.212  122.9    3.4   247   20.9 




    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.

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