(20) Massalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Mar 2026	9.5	2.258 AU	1.313 AU	12h17m	-02°35'	156.9°	9.9°
Opposition	21 Mar 2026	9.0	2.287 AU	1.291 AU	12h01m	-00°46'	179.4°	0.2°

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) : 205.95448
            ω (Argument of perihelion)      : 257.23336
            M (Mean anomaly)                : 29.99984
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 283.18689
            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
2026-03-03 00:00 UT   12 17 42.4   -02 35 44     1.313    2.258  156.9    9.9   295    9.5 
2026-03-03 08:43 UT   12 17 26.4   -02 33 56     1.311    2.259  157.4    9.7   295    9.5 
2026-03-04 00:00 UT   12 16 57.8   -02 30 42     1.309    2.260  158.2    9.4   295    9.5 
2026-03-05 00:00 UT   12 16 12.0   -02 25 32     1.306    2.261  159.4    8.9   295    9.5 
2026-03-06 00:00 UT   12 15 25.0   -02 20 13     1.303    2.263  160.6    8.4   295    9.5 
2026-03-07 00:00 UT   12 14 37.0   -02 14 47     1.301    2.265  161.8    7.9   295    9.4 
2026-03-08 00:00 UT   12 13 48.0   -02 09 14     1.298    2.266  163.0    7.3   295    9.4 
2026-03-09 00:00 UT   12 12 58.0   -02 03 33     1.296    2.268  164.3    6.8   296    9.4 
2026-03-10 00:00 UT   12 12 07.1   -01 57 47     1.294    2.269  165.5    6.3   296    9.4 
2026-03-11 00:00 UT   12 11 15.5   -01 51 54     1.292    2.271  166.7    5.8   296    9.3 
2026-03-12 00:00 UT   12 10 23.0   -01 45 56     1.291    2.272  168.0    5.2   296    9.3 
2026-03-13 00:00 UT   12 09 30.0   -01 39 53     1.290    2.274  169.2    4.7   296    9.3 
2026-03-14 00:00 UT   12 08 36.3   -01 33 46     1.289    2.275  170.4    4.2   297    9.3 
2026-03-15 00:00 UT   12 07 42.2   -01 27 34     1.288    2.277  171.7    3.6   297    9.2 
2026-03-16 00:00 UT   12 06 47.6   -01 21 20     1.288    2.278  172.9    3.1   298    9.2 
2026-03-17 00:00 UT   12 05 52.7   -01 15 02     1.288    2.280  174.2    2.5   299    9.2 
2026-03-18 00:00 UT   12 04 57.5   -01 08 42     1.288    2.282  175.4    2.0   300    9.1 
2026-03-19 00:00 UT   12 04 02.1   -01 02 21     1.289    2.283  176.6    1.5   303    9.1 
2026-03-20 00:00 UT   12 03 06.7   +00 55 58     1.289    2.285  177.9    0.9   308    9.0 
2026-03-21 00:00 UT   12 02 11.2   +00 49 35     1.290    2.286  179.0    0.4   327    9.0 
2026-03-22 00:00 UT   12 01 15.9   +00 43 12     1.292    2.288  179.3    0.3    63    9.0 
2026-03-23 00:00 UT   12 00 20.7   +00 36 50     1.293    2.289  178.2    0.8    96    9.0 
2026-03-24 00:00 UT   11 59 25.7   +00 30 28     1.295    2.291  177.0    1.3   103    9.1 
2026-03-25 00:00 UT   11 58 31.0   +00 24 09     1.297    2.293  175.8    1.8   106    9.1 
2026-03-26 00:00 UT   11 57 36.8   +00 17 51     1.299    2.294  174.6    2.4   108    9.2 
2026-03-27 00:00 UT   11 56 43.1   +00 11 37     1.302    2.296  173.3    2.9   109    9.2 
2026-03-28 00:00 UT   11 55 49.9   +00 05 26     1.305    2.297  172.1    3.4   110    9.3 
2026-03-29 00:00 UT   11 54 57.3   +00 00 41     1.308    2.299  170.9    3.9   110    9.3 
2026-03-30 00:00 UT   11 54 05.4   +00 06 44     1.311    2.301  169.7    4.5   111    9.3 
2026-03-31 00:00 UT   11 53 14.3   +00 12 43     1.315    2.302  168.4    5.0   111    9.4 
2026-04-01 00:00 UT   11 52 24.0   +00 18 36     1.319    2.304  167.2    5.5   111    9.4 
2026-04-02 00:00 UT   11 51 34.6   +00 24 24     1.323    2.305  166.0    6.0   112    9.4 

    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.