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P/2020 X1 (ATLAS)
ephemeris date magn radius delta ra dec elong phase PA
Today20 Nov 202525.16.141 AU7.024 AU 14h30m-02°10'24.8°3.9°316°
Perihelion19 Mar 203020.52.885 AU3.773 AU 01h24m-06°03'23.2°7.8°103°
Nearest approach25 Nov 203019.93.246 AU2.293 AU 04h48m+35°42'161.9°5.4°217°
P/2020 X1 (ATLAS)- 2025-11-20
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. 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. (13.0 + 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 P/2020 X1 (ATLAS) are: 

    e (Eccentricity)                : 0.3641540
    q (Perihelion distance)         : 2.8848370
    i (Inclination)                 : 31.68820
    Ω (Longitude of ascending node) : 55.99140
    ω (Argument of perihelion)      : 323.52370
    L (Longitude of perihelion)     : 23.81729
    B (Latitude of perihelion)      : -18.19690
    T (Time of perihelion passage)  : 2462579.82210
    P (Orbital period in years)     : 9.66

    Epoch                           : 2025 Nov 19
    Reference                       : MPEC 2024-F34

    Classification(s):              : Ecliptic; Jupiter family
    Tisserand (Jupiter)             : 2.627

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-11-19 00:00 UT   14 30 03.9   -02 05 09     7.033    6.142   23.8    3.7   318   25.1 
2025-11-20 00:00 UT   14 30 41.9   -02 09 07     7.027    6.141   24.5    3.8   317   25.1 
2025-11-20 08:09 UT   14 30 54.8   -02 10 27     7.024    6.141   24.8    3.9   316   25.1 
2025-11-21 00:00 UT   14 31 19.9   -02 13 02     7.020    6.141   25.2    3.9   316   25.1 
2025-11-22 00:00 UT   14 31 57.8   -02 16 55     7.013    6.140   26.0    4.0   315   25.1 
2025-11-23 00:00 UT   14 32 35.5   -02 20 46     7.006    6.140   26.7    4.1   314   25.1 
2025-11-24 00:00 UT   14 33 13.2   -02 24 34     6.999    6.139   27.4    4.3   313   25.1 
2025-11-25 00:00 UT   14 33 50.7   -02 28 20     6.991    6.139   28.2    4.4   312   25.1 
2025-11-26 00:00 UT   14 34 28.1   -02 32 04     6.983    6.138   28.9    4.5   311   25.1 
2025-11-27 00:00 UT   14 35 05.4   -02 35 45     6.975    6.138   29.7    4.6   310   25.1 
2025-11-28 00:00 UT   14 35 42.5   -02 39 24     6.967    6.137   30.5    4.7   310   25.1 
2025-11-29 00:00 UT   14 36 19.5   -02 43 00     6.959    6.136   31.2    4.8   309   25.1 
2025-11-30 00:00 UT   14 36 56.3   -02 46 34     6.950    6.136   32.0    4.9   308   25.1 




    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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