(20) Massalia
ephemeris date magn radius delta ra dec elong phase
Today3 Nov 202511.22.106 AU2.425 AU10h48m+06°59'59.7°24.0°
Opposition21 Mar 20269.02.287 AU1.291 AU12h01m-00°46'179.4°0.2°
(20) Massalia - 2025-11-03
astro.vanbuitenen.nl


 
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The interactive orbit chart above shows the body'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 Massalia are:

            e (Eccentricity)                : 0.1437636
            a (Semimajor axis)              : 2.4084078
            i (Inclination)                 : 0.70925
            Ω (Longitude of ascending node) : 205.95443
            ω (Argument of perihelion)      : 257.23342
            M (Mean anomaly)                : 29.99984
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 283.18690
            B (Latitude of perihelion)      : -0.69172
            P (Orbital period in years)     : 3.74            
        

The light curve chart below shows the estimated development of the minor planet's magnitude.


The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.





The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes.




Ephemerides:
Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-11-03 00:00 UT   10 48 10.2   +06 59 33     2.425    2.106   59.7   24.0   292   11.2 
2025-11-03 21:19 UT   10 49 42.1   +06 50 10     2.417    2.107   60.2   24.1   292   11.2 
2025-11-04 00:00 UT   10 49 53.6   +06 48 59     2.416    2.107   60.2   24.1   292   11.2 
2025-11-05 00:00 UT   10 51 36.5   +06 38 25     2.407    2.108   60.8   24.2   292   11.2 
2025-11-06 00:00 UT   10 53 18.8   +06 27 53     2.397    2.109   61.3   24.4   292   11.2 
2025-11-07 00:00 UT   10 55 00.6   +06 17 23     2.388    2.110   61.9   24.5   292   11.2 
2025-11-08 00:00 UT   10 56 41.9   +06 06 54     2.379    2.111   62.4   24.6   292   11.2 
2025-11-09 00:00 UT   10 58 22.6   +05 56 26     2.369    2.112   63.0   24.7   292   11.2 
2025-11-10 00:00 UT   11 00 02.8   +05 46 00     2.360    2.113   63.5   24.8   292   11.2 
2025-11-11 00:00 UT   11 01 42.4   +05 35 37     2.350    2.114   64.1   24.9   292   11.2 
2025-11-12 00:00 UT   11 03 21.4   +05 25 15     2.340    2.115   64.6   25.0   292   11.2 
2025-11-13 00:00 UT   11 04 59.9   +05 14 55     2.331    2.116   65.2   25.1   292   11.2 
2025-11-14 00:00 UT   11 06 37.8   +05 04 37     2.321    2.117   65.8   25.2   293   11.2 
2025-11-15 00:00 UT   11 08 15.1   +04 54 22     2.311    2.118   66.3   25.3   293   11.2 
2025-11-16 00:00 UT   11 09 51.8   +04 44 09     2.302    2.119   66.9   25.4   293   11.1 
2025-11-17 00:00 UT   11 11 27.9   +04 33 58     2.292    2.120   67.5   25.5   293   11.1 
2025-11-18 00:00 UT   11 13 03.3   +04 23 51     2.282    2.121   68.0   25.6   293   11.1 
2025-11-19 00:00 UT   11 14 38.1   +04 13 46     2.272    2.122   68.6   25.7   293   11.1 
2025-11-20 00:00 UT   11 16 12.3   +04 03 44     2.262    2.123   69.2   25.8   293   11.1 
2025-11-21 00:00 UT   11 17 45.9   +03 53 45     2.252    2.124   69.8   25.9   293   11.1 
2025-11-22 00:00 UT   11 19 18.8   +03 43 49     2.242    2.125   70.4   26.0   293   11.1 


    Terminology:
            
    delta:  distance between minor planet and earth in AU
    radius: distance between minor planet 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-minor planet)    
    phase:  phase angle in degrees (angle sun-minor planet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    

Orbital elements provided by 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.