(20) Massalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	1 Jun 2026	11.0	2.402 AU	1.912 AU	11h46m	+01°20'	106.2°	23.9°
Opposition	11 Jul 2027	10.0	2.752 AU	1.736 AU	19h21m	-20°58'	178.8°	0.4°

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) : 205.95449
            ω (Argument of perihelion)      : 257.23336
            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
2026-06-01 00:00 UT   11 46 41.9   +01 20 36     1.912    2.402  106.2   23.9   113   11.0 
2026-06-01 08:15 UT   11 46 55.3   +01 19 15     1.916    2.402  106.0   23.9   113   11.0 
2026-06-02 00:00 UT   11 47 21.3   +01 16 39     1.925    2.403  105.5   24.0   113   11.0 
2026-06-03 00:00 UT   11 48 01.8   +01 12 34     1.938    2.405  104.7   24.1   113   11.0 
2026-06-04 00:00 UT   11 48 43.4   +01 08 21     1.952    2.406  103.9   24.2   113   11.0 
2026-06-05 00:00 UT   11 49 26.0   +01 04 02     1.965    2.408  103.1   24.2   113   11.0 
2026-06-06 00:00 UT   11 50 09.8   +00 59 35     1.979    2.410  102.4   24.3   113   11.1 
2026-06-07 00:00 UT   11 50 54.6   +00 55 01     1.992    2.411  101.6   24.3   113   11.1 
2026-06-08 00:00 UT   11 51 40.4   +00 50 20     2.006    2.413  100.9   24.4   113   11.1 
2026-06-09 00:00 UT   11 52 27.2   +00 45 32     2.019    2.414  100.1   24.4   113   11.1 
2026-06-10 00:00 UT   11 53 15.0   +00 40 38     2.033    2.416   99.4   24.5   113   11.1 
2026-06-11 00:00 UT   11 54 03.8   +00 35 36     2.046    2.417   98.7   24.5   113   11.2 
2026-06-12 00:00 UT   11 54 53.6   +00 30 29     2.060    2.419   97.9   24.6   113   11.2 
2026-06-13 00:00 UT   11 55 44.3   +00 25 15     2.074    2.421   97.2   24.6   113   11.2 
2026-06-14 00:00 UT   11 56 36.0   +00 19 54     2.087    2.422   96.5   24.6   113   11.2 
2026-06-15 00:00 UT   11 57 28.5   +00 14 27     2.101    2.424   95.8   24.6   113   11.2 
2026-06-16 00:00 UT   11 58 22.0   +00 08 55     2.115    2.425   95.0   24.7   113   11.2 
2026-06-17 00:00 UT   11 59 16.4   +00 03 16     2.129    2.427   94.3   24.7   113   11.2 
2026-06-18 00:00 UT   12 00 11.6   +00 02 29     2.142    2.429   93.6   24.7   113   11.3 
2026-06-19 00:00 UT   12 01 07.7   +00 08 19     2.156    2.430   92.9   24.7   113   11.3 
2026-06-20 00:00 UT   12 02 04.6   +00 14 15     2.170    2.432   92.2   24.7   113   11.3 
2026-06-21 00:00 UT   12 03 02.4   +00 20 17     2.184    2.433   91.5   24.7   113   11.3 
2026-06-22 00:00 UT   12 04 00.9   +00 26 23     2.198    2.435   90.8   24.7   113   11.3 
2026-06-23 00:00 UT   12 05 00.3   +00 32 36     2.212    2.436   90.2   24.7   113   11.3 
2026-06-24 00:00 UT   12 06 00.4   +00 38 53     2.225    2.438   89.5   24.6   113   11.4 
2026-06-25 00:00 UT   12 07 01.2   +00 45 15     2.239    2.440   88.8   24.6   113   11.4 
2026-06-26 00:00 UT   12 08 02.8   +00 51 42     2.253    2.441   88.1   24.6   113   11.4 
2026-06-27 00:00 UT   12 09 05.2   +00 58 14     2.267    2.443   87.4   24.6   113   11.4 
2026-06-28 00:00 UT   12 10 08.2   -01 04 50     2.281    2.444   86.8   24.5   113   11.4 
2026-06-29 00:00 UT   12 11 11.9   -01 11 31     2.295    2.446   86.1   24.5   113   11.4 
2026-06-30 00:00 UT   12 12 16.3   -01 18 17     2.308    2.447   85.5   24.5   113   11.4 
2026-07-01 00:00 UT   12 13 21.4   -01 25 07     2.322    2.449   84.8   24.4   113   11.5 

    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.