(81) Terpsichore
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 Jul 2025	14.6	2.972 AU	3.518 AU	10h11m	+13°02'	50.2°	15.2°
Opposition	21 Apr 2026	13.5	3.398 AU	2.397 AU	13h49m	-17°20'	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)                : 0.2118771
            a (Semimajor axis)              : 2.8515770
            i (Inclination)                 : 7.80131
            Ω (Longitude of ascending node) : 0.89553
            ω (Argument of perihelion)      : 51.23215
            M (Mean anomaly)                : 77.70798
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 51.86732
            B (Latitude of perihelion)      : 6.07520
            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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-07-02 00:00 UT   10 11 47.3   +13 02 17     3.518    2.972   50.2   15.2   109   14.6 
2025-07-02 03:26 UT   10 11 58.0   +13 01 04     3.520    2.972   50.1   15.2   109   14.6 
2025-07-03 00:00 UT   10 13 02.1   +12 53 45     3.530    2.974   49.6   15.1   109   14.6 
2025-07-04 00:00 UT   10 14 17.1   +12 45 10     3.542    2.976   49.0   14.9   109   14.6 
2025-07-05 00:00 UT   10 15 32.2   +12 36 34     3.555    2.978   48.4   14.8   109   14.6 
2025-07-06 00:00 UT   10 16 47.6   +12 27 56     3.567    2.980   47.7   14.6   109   14.6 
2025-07-07 00:00 UT   10 18 03.0   +12 19 17     3.579    2.982   47.1   14.5   110   14.6 
2025-07-08 00:00 UT   10 19 18.7   +12 10 36     3.591    2.984   46.5   14.3   110   14.6 
2025-07-09 00:00 UT   10 20 34.4   +12 01 53     3.603    2.986   45.9   14.2   110   14.7 
2025-07-10 00:00 UT   10 21 50.4   +11 53 09     3.614    2.988   45.3   14.0   110   14.7 
2025-07-11 00:00 UT   10 23 06.4   +11 44 23     3.626    2.990   44.7   13.8   110   14.7 
2025-07-12 00:00 UT   10 24 22.6   +11 35 35     3.637    2.992   44.1   13.7   110   14.7 
2025-07-13 00:00 UT   10 25 39.0   +11 26 46     3.649    2.994   43.5   13.5   110   14.7 
2025-07-14 00:00 UT   10 26 55.4   +11 17 55     3.660    2.996   42.9   13.3   110   14.7 
2025-07-15 00:00 UT   10 28 12.0   +11 09 03     3.671    2.998   42.2   13.2   110   14.7 
2025-07-16 00:00 UT   10 29 28.7   +11 00 10     3.682    3.000   41.6   13.0   110   14.7 
2025-07-17 00:00 UT   10 30 45.5   +10 51 14     3.693    3.002   41.0   12.8   110   14.7 
2025-07-18 00:00 UT   10 32 02.5   +10 42 18     3.704    3.004   40.4   12.7   110   14.7 
2025-07-19 00:00 UT   10 33 19.5   +10 33 19     3.715    3.006   39.8   12.5   110   14.7 
2025-07-20 00:00 UT   10 34 36.7   +10 24 20     3.726    3.008   39.2   12.3   110   14.7 
2025-07-21 00:00 UT   10 35 54.0   +10 15 18     3.736    3.010   38.6   12.2   110   14.7 
2025-07-22 00:00 UT   10 37 11.3   +10 06 16     3.747    3.012   38.0   12.0   110   14.7 
2025-07-23 00:00 UT   10 38 28.8   +09 57 12     3.757    3.014   37.4   11.8   110   14.7 
2025-07-24 00:00 UT   10 39 46.4   +09 48 07     3.767    3.016   36.8   11.6   110   14.7 
2025-07-25 00:00 UT   10 41 04.0   +09 38 60     3.777    3.018   36.2   11.5   110   14.7 
2025-07-26 00:00 UT   10 42 21.8   +09 29 52     3.787    3.020   35.6   11.3   110   14.7 

    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.