(81) Terpsichore
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	1 Dec 2025	14.9	3.240 AU	3.856 AU	13h24m	-10°06'	45.4°	12.5°
Opposition	21 Apr 2026	13.5	3.398 AU	2.397 AU	13h49m	-17°21'	174.3°	1.7°

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)                : 118.66687
            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
2025-12-01 00:00 UT   13 24 37.1   -10 06 52     3.856    3.240   45.4   12.5   291   14.9 
2025-12-01 00:40 UT   13 24 39.0   -10 07 05     3.855    3.240   45.4   12.5   291   14.9 
2025-12-02 00:00 UT   13 25 43.4   -10 14 42     3.846    3.241   46.1   12.7   291   14.9 
2025-12-03 00:00 UT   13 26 49.3   -10 22 31     3.837    3.243   46.8   12.8   291   14.9 
2025-12-04 00:00 UT   13 27 54.9   -10 30 16     3.827    3.244   47.5   12.9   291   14.9 
2025-12-05 00:00 UT   13 29 00.1   -10 37 59     3.818    3.246   48.2   13.1   291   14.9 
2025-12-06 00:00 UT   13 30 04.9   -10 45 39     3.808    3.247   49.0   13.2   290   14.9 
2025-12-07 00:00 UT   13 31 09.4   -10 53 17     3.798    3.248   49.7   13.4   290   14.9 
2025-12-08 00:00 UT   13 32 13.4   -11 00 52     3.788    3.250   50.4   13.5   290   14.9 
2025-12-09 00:00 UT   13 33 17.1   -11 08 24     3.778    3.251   51.1   13.6   290   14.9 
2025-12-10 00:00 UT   13 34 20.4   -11 15 54     3.767    3.253   51.9   13.8   290   14.9 
2025-12-11 00:00 UT   13 35 23.3   -11 23 20     3.757    3.254   52.6   13.9   290   14.9 
2025-12-12 00:00 UT   13 36 25.8   -11 30 44     3.746    3.255   53.3   14.0   290   14.9 
2025-12-13 00:00 UT   13 37 27.8   -11 38 05     3.736    3.257   54.1   14.2   290   14.9 
2025-12-14 00:00 UT   13 38 29.4   -11 45 24     3.725    3.258   54.8   14.3   290   14.9 
2025-12-15 00:00 UT   13 39 30.6   -11 52 39     3.714    3.260   55.5   14.4   290   14.9 
2025-12-16 00:00 UT   13 40 31.3   -11 59 51     3.703    3.261   56.3   14.5   290   14.9 
2025-12-17 00:00 UT   13 41 31.5   -12 07 01     3.692    3.262   57.0   14.7   290   14.9 
2025-12-18 00:00 UT   13 42 31.3   -12 14 07     3.681    3.264   57.8   14.8   290   14.9 
2025-12-19 00:00 UT   13 43 30.5   -12 21 10     3.669    3.265   58.5   14.9   290   14.9 
2025-12-20 00:00 UT   13 44 29.3   -12 28 10     3.658    3.267   59.3   15.0   290   14.9 
2025-12-21 00:00 UT   13 45 27.6   -12 35 08     3.646    3.268   60.0   15.1   290   14.9 
2025-12-22 00:00 UT   13 46 25.3   -12 42 02     3.635    3.269   60.8   15.2   290   14.9 
2025-12-23 00:00 UT   13 47 22.5   -12 48 52     3.623    3.271   61.6   15.3   290   14.9 
2025-12-24 00:00 UT   13 48 19.2   -12 55 40     3.611    3.272   62.3   15.4   290   14.9 
2025-12-25 00:00 UT   13 49 15.4   -13 02 24     3.599    3.273   63.1   15.5   290   14.9 
2025-12-26 00:00 UT   13 50 10.9   -13 09 05     3.587    3.275   63.9   15.6   290   14.9 
2025-12-27 00:00 UT   13 51 05.9   -13 15 43     3.575    3.276   64.6   15.7   290   14.9 
2025-12-28 00:00 UT   13 52 00.3   -13 22 18     3.562    3.277   65.4   15.8   290   14.9 
2025-12-29 00:00 UT   13 52 54.2   -13 28 49     3.550    3.279   66.2   15.9   290   14.9 
2025-12-30 00:00 UT   13 53 47.4   -13 35 17     3.538    3.280   67.0   16.0   290   14.9 
2025-12-31 00:00 UT   13 54 40.0   -13 41 41     3.525    3.281   67.7   16.1   290   14.9 

    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.