C/2020 M3 (ATLAS)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion25 Oct 20208.31.270 AU0.403 AU05h06m-18°09'125.2°39.8°301°
Nearest approach14 Nov 20208.21.303 AU0.357 AU05h22m+04°16'147.0°24.4°298°
Today19 Mar 202430.510.938 AU10.026 AU13h02m+19°01'155.2°2.2°224°
C/2020 M3 (ATLAS)- 2024-03-19
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.)

The orbital elements of C/2020 M3 (ATLAS) are:

            e (Eccentricity)                : 0.9533140
            q (Perihelion distance)         : 1.2701240
            i (Inclination)                 : 23.47050
            Ω (Longitude of ascending node) : 71.17680
            ω (Argument of perihelion)      : 328.58290
            L (Longitude of perihelion)     : 41.91590
            B (Latitude of perihelion)      : -11.98218
            T (Time of perihelion passage)  : 2459148.49600
            P (Orbital period in years)     : 141.90

            Epoch                           : 2024 Mar 18
            Reference                       : MPEC 2022-H30

            Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)
        

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (14.50 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 8.58 + 5 log[∆] + 16.25 log[r]).


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.
A more printer-friendly version of the same chart can be found further down this page as well.


The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.


A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.



Ephemerides:
Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2024-03-19 00:00 UT   13 02 40.7   +19 01 15    10.026   10.938  155.1    2.2   224   30.5 
2024-03-19 03:19 UT   13 02 38.1   +19 01 34    10.026   10.938  155.2    2.2   224   30.5 
2024-03-20 00:00 UT   13 02 21.6   +19 03 29    10.030   10.944  155.4    2.2   222   30.5 
2024-03-21 00:00 UT   13 02 02.3   +19 05 40    10.034   10.950  155.7    2.1   219   30.5 
2024-03-22 00:00 UT   13 01 42.9   +19 07 49    10.038   10.956  155.9    2.1   216   30.5 
2024-03-23 00:00 UT   13 01 23.4   +19 09 56    10.043   10.962  156.1    2.1   214   30.5 
2024-03-24 00:00 UT   13 01 03.8   +19 12 00    10.048   10.968  156.2    2.1   211   30.5 
2024-03-25 00:00 UT   13 00 44.2   +19 14 02    10.053   10.974  156.3    2.1   209   30.5 
2024-03-26 00:00 UT   13 00 24.5   +19 16 02    10.059   10.980  156.4    2.1   206   30.5 
2024-03-27 00:00 UT   13 00 04.7   +19 17 59    10.064   10.986  156.4    2.1   203   30.5 
2024-03-28 00:00 UT   12 59 44.8   +19 19 54    10.070   10.992  156.3    2.1   200   30.5 
2024-03-29 00:00 UT   12 59 25.0   +19 21 47    10.077   10.998  156.2    2.1   198   30.5 


    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.