(81) Terpsichore
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Apr 2026	13.5	3.393 AU	2.401 AU	13h55m	-17°40'	170.0°	2.9°
Opposition	21 Apr 2026	13.4	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)                : 118.66686
            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
2026-04-15 00:00 UT   13 55 23.7   -17 40 16     2.401    3.393  170.0    2.9   324   13.5 
2026-04-15 01:47 UT   13 55 19.9   -17 40 04     2.400    3.393  170.1    2.9   324   13.5 
2026-04-16 00:00 UT   13 54 32.3   -17 37 29     2.399    3.394  171.0    2.7   328   13.5 
2026-04-17 00:00 UT   13 53 40.7   -17 34 39     2.398    3.395  171.9    2.4   333   13.5 
2026-04-18 00:00 UT   13 52 49.0   -17 31 44     2.397    3.395  172.7    2.2   340   13.5 
2026-04-19 00:00 UT   13 51 57.3   -17 28 45     2.397    3.396  173.3    2.0   348   13.5 
2026-04-20 00:00 UT   13 51 05.5   -17 25 42     2.396    3.397  173.9    1.8   357   13.4 
2026-04-21 00:00 UT   13 50 13.7   -17 22 37     2.396    3.398  174.2    1.7     9   13.4 
2026-04-22 00:00 UT   13 49 22.0   -17 19 27     2.397    3.398  174.3    1.7    20   13.4 
2026-04-23 00:00 UT   13 48 30.4   -17 16 15     2.398    3.399  174.2    1.7    32   13.4 
2026-04-24 00:00 UT   13 47 39.0   -17 13 01     2.399    3.400  173.8    1.8    43   13.5 
2026-04-25 00:00 UT   13 46 47.8   -17 09 43     2.400    3.401  173.3    2.0    53   13.5 
2026-04-26 00:00 UT   13 45 56.9   -17 06 24     2.401    3.402  172.6    2.2    60   13.5 
2026-04-27 00:00 UT   13 45 06.2   -17 03 02     2.403    3.402  171.8    2.4    67   13.5 
2026-04-28 00:00 UT   13 44 15.9   -16 59 39     2.405    3.403  170.9    2.7    72   13.5 
2026-04-29 00:00 UT   13 43 26.0   -16 56 14     2.408    3.404  169.9    3.0    76   13.5 
2026-04-30 00:00 UT   13 42 36.6   -16 52 48     2.411    3.404  168.9    3.3    80   13.6 
2026-05-01 00:00 UT   13 41 47.6   -16 49 21     2.414    3.405  167.9    3.6    83   13.6 
2026-05-02 00:00 UT   13 40 59.1   -16 45 53     2.417    3.406  166.9    3.9    85   13.6 
2026-05-03 00:00 UT   13 40 11.1   -16 42 24     2.421    3.407  165.8    4.2    87   13.6 
2026-05-04 00:00 UT   13 39 23.7   -16 38 55     2.424    3.407  164.7    4.5    89   13.6 
2026-05-05 00:00 UT   13 38 37.0   -16 35 26     2.429    3.408  163.6    4.8    91   13.7 
2026-05-06 00:00 UT   13 37 50.9   -16 31 57     2.433    3.409  162.5    5.1    92   13.7 
2026-05-07 00:00 UT   13 37 05.5   -16 28 28     2.438    3.409  161.5    5.4    93   13.7 
2026-05-08 00:00 UT   13 36 20.9   -16 25 00     2.443    3.410  160.4    5.7    94   13.7 
2026-05-09 00:00 UT   13 35 37.0   -16 21 33     2.448    3.411  159.3    6.0    95   13.8 
2026-05-10 00:00 UT   13 34 53.9   -16 18 07     2.454    3.411  158.1    6.3    96   13.8 
2026-05-11 00:00 UT   13 34 11.6   -16 14 42     2.459    3.412  157.0    6.6    97   13.8 
2026-05-12 00:00 UT   13 33 30.2   -16 11 19     2.466    3.413  155.9    6.9    98   13.8 
2026-05-13 00:00 UT   13 32 49.6   -16 07 58     2.472    3.413  154.8    7.2    99   13.8 
2026-05-14 00:00 UT   13 32 10.0   -16 04 39     2.479    3.414  153.7    7.5    99   13.8 
2026-05-15 00:00 UT   13 31 31.3   -16 01 22     2.485    3.415  152.6    7.8   100   13.9 

    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.