(81) Terpsichore
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 Oct 2025	14.8	3.185 AU	4.094 AU	12h41m	-04°59'	20.9°	6.4°
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
2025-10-26 00:00 UT   12 41 52.2   -04 59 59     4.094    3.185   20.9    6.4   292   14.8 
2025-10-26 20:35 UT   12 42 56.4   -05 07 45     4.090    3.186   21.5    6.6   292   14.8 
2025-10-27 00:00 UT   12 43 07.0   -05 09 02     4.090    3.186   21.6    6.6   292   14.8 
2025-10-28 00:00 UT   12 44 21.7   -05 18 05     4.086    3.188   22.2    6.8   292   14.8 
2025-10-29 00:00 UT   12 45 36.2   -05 27 05     4.081    3.189   22.9    7.0   292   14.8 
2025-10-30 00:00 UT   12 46 50.6   -05 36 04     4.077    3.191   23.5    7.1   292   14.8 
2025-10-31 00:00 UT   12 48 04.7   -05 45 01     4.072    3.193   24.2    7.3   292   14.8 
2025-11-01 00:00 UT   12 49 18.7   -05 53 57     4.068    3.194   24.8    7.5   292   14.8 
2025-11-02 00:00 UT   12 50 32.6   -06 02 51     4.063    3.196   25.5    7.7   292   14.8 
2025-11-03 00:00 UT   12 51 46.2   -06 11 43     4.058    3.197   26.2    7.9   292   14.8 
2025-11-04 00:00 UT   12 52 59.7   -06 20 34     4.052    3.199   26.8    8.0   292   14.8 
2025-11-05 00:00 UT   12 54 12.9   -06 29 23     4.047    3.200   27.5    8.2   292   14.8 
2025-11-06 00:00 UT   12 55 26.0   -06 38 10     4.042    3.202   28.2    8.4   291   14.8 
2025-11-07 00:00 UT   12 56 38.9   -06 46 56     4.036    3.204   28.8    8.6   291   14.8 
2025-11-08 00:00 UT   12 57 51.6   -06 55 39     4.030    3.205   29.5    8.8   291   14.8 
2025-11-09 00:00 UT   12 59 04.1   -07 04 21     4.024    3.207   30.2    8.9   291   14.8 
2025-11-10 00:00 UT   13 00 16.4   -07 13 01     4.018    3.208   30.8    9.1   291   14.9 
2025-11-11 00:00 UT   13 01 28.5   -07 21 39     4.012    3.210   31.5    9.3   291   14.9 
2025-11-12 00:00 UT   13 02 40.4   -07 30 15     4.005    3.211   32.2    9.5   291   14.9 
2025-11-13 00:00 UT   13 03 52.1   -07 38 49     3.999    3.213   32.9    9.6   291   14.9 
2025-11-14 00:00 UT   13 05 03.5   -07 47 22     3.992    3.214   33.5    9.8   291   14.9 
2025-11-15 00:00 UT   13 06 14.7   -07 55 52     3.985    3.216   34.2   10.0   291   14.9 
2025-11-16 00:00 UT   13 07 25.7   -08 04 20     3.978    3.217   34.9   10.1   291   14.9 
2025-11-17 00:00 UT   13 08 36.4   -08 12 46     3.971    3.219   35.6   10.3   291   14.9 
2025-11-18 00:00 UT   13 09 46.9   -08 21 10     3.964    3.220   36.3   10.5   291   14.9 
2025-11-19 00:00 UT   13 10 57.1   -08 29 32     3.956    3.222   37.0   10.6   291   14.9 
2025-11-20 00:00 UT   13 12 07.0   -08 37 51     3.949    3.223   37.7   10.8   291   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.