(81) Terpsichore
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	21 Apr 2026	13.4	3.398 AU	2.397 AU	13h49m	-17°21'	174.3°	1.7°
Today	21 May 2026	14.0	3.419 AU	2.532 AU	13h28m	-15°42'	146.1°	9.5°

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 Terpsichore are:

            e (Eccentricity)                : 0.2117711
            a (Semimajor axis)              : 2.8515286
            i (Inclination)                 : 7.80119
            Ω (Longitude of ascending node) : 0.89514
            ω (Argument of perihelion)      : 51.22360
            M (Mean anomaly)                : 118.66686
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 51.85837
            B (Latitude of perihelion)      : 6.07438
            P (Orbital period in years)     : 4.82            
        

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
2026-05-21 00:00 UT   13 28 00.5   -15 42 41     2.532    3.419  146.1    9.5   103   14.0 
2026-05-21 06:59 UT   13 27 51.3   -15 41 50     2.534    3.419  145.8    9.6   103   14.0 
2026-05-22 00:00 UT   13 27 29.1   -15 39 47     2.540    3.419  145.0    9.8   103   14.0 
2026-05-23 00:00 UT   13 26 58.9   -15 36 56     2.549    3.420  143.9   10.0   103   14.0 
2026-05-24 00:00 UT   13 26 29.7   -15 34 09     2.558    3.420  142.9   10.3   104   14.0 
2026-05-25 00:00 UT   13 26 01.7   -15 31 27     2.567    3.421  141.8   10.6   104   14.1 
2026-05-26 00:00 UT   13 25 34.9   -15 28 49     2.577    3.422  140.7   10.8   104   14.1 
2026-05-27 00:00 UT   13 25 09.2   -15 26 15     2.586    3.422  139.7   11.0   105   14.1 
2026-05-28 00:00 UT   13 24 44.7   -15 23 47     2.596    3.423  138.6   11.3   105   14.1 
2026-05-29 00:00 UT   13 24 21.3   -15 21 23     2.606    3.423  137.6   11.5   105   14.1 
2026-05-30 00:00 UT   13 23 59.2   -15 19 03     2.617    3.424  136.5   11.8   106   14.1 
2026-05-31 00:00 UT   13 23 38.2   -15 16 49     2.627    3.425  135.5   12.0   106   14.2 
2026-06-01 00:00 UT   13 23 18.5   -15 14 40     2.638    3.425  134.5   12.2   106   14.2 
2026-06-02 00:00 UT   13 22 59.9   -15 12 36     2.648    3.426  133.4   12.4   106   14.2 
2026-06-03 00:00 UT   13 22 42.5   -15 10 38     2.659    3.426  132.4   12.6   106   14.2 
2026-06-04 00:00 UT   13 22 26.3   -15 08 45     2.671    3.427  131.4   12.8   107   14.2 
2026-06-05 00:00 UT   13 22 11.3   -15 06 57     2.682    3.427  130.4   13.0   107   14.3 
2026-06-06 00:00 UT   13 21 57.6   -15 05 15     2.693    3.428  129.4   13.2   107   14.3 
2026-06-07 00:00 UT   13 21 45.0   -15 03 38     2.705    3.428  128.4   13.4   107   14.3 
2026-06-08 00:00 UT   13 21 33.6   -15 02 08     2.717    3.429  127.4   13.6   107   14.3 
2026-06-09 00:00 UT   13 21 23.5   -15 00 42     2.729    3.429  126.4   13.8   108   14.3 
2026-06-10 00:00 UT   13 21 14.5   -14 59 23     2.741    3.430  125.4   14.0   108   14.3 
2026-06-11 00:00 UT   13 21 06.8   -14 58 10     2.753    3.430  124.4   14.1   108   14.3 
2026-06-12 00:00 UT   13 21 00.2   -14 57 02     2.766    3.431  123.4   14.3   108   14.4 
2026-06-13 00:00 UT   13 20 54.8   -14 56 01     2.778    3.431  122.4   14.5   108   14.4 
2026-06-14 00:00 UT   13 20 50.7   -14 55 06     2.791    3.432  121.5   14.6   108   14.4 
2026-06-15 00:00 UT   13 20 47.7   -14 54 16     2.804    3.432  120.5   14.8   109   14.4 
2026-06-16 00:00 UT   13 20 45.9   -14 53 33     2.816    3.433  119.5   14.9   109   14.4 
2026-06-17 00:00 UT   13 20 45.3   -14 52 56     2.829    3.433  118.6   15.1   109   14.4 
2026-06-18 00:00 UT   13 20 45.9   -14 52 25     2.843    3.434  117.6   15.2   109   14.5 
2026-06-19 00:00 UT   13 20 47.7   -14 52 00     2.856    3.434  116.7   15.3   109   14.5 
2026-06-20 00:00 UT   13 20 50.6   -14 51 41     2.869    3.435  115.7   15.5   109   14.5 

    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.