(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	18 Jun 2026	14.4	3.434 AU	2.843 AU	13h20m	-14°52'	117.6°	15.2°

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)                : 0.2115948
            a (Semimajor axis)              : 2.8518803
            i (Inclination)                 : 7.80051
            Ω (Longitude of ascending node) : 0.89287
            ω (Argument of perihelion)      : 51.22996
            M (Mean anomaly)                : 159.60693
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 51.86252
            B (Latitude of perihelion)      : 6.07439
            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
2026-06-18 00:00 UT   13 20 46.3   -14 52 28     2.843    3.434  117.6   15.2   109   14.4 
2026-06-18 11:52 UT   13 20 47.0   -14 52 15     2.849    3.434  117.2   15.3   109   14.5 
2026-06-19 00:00 UT   13 20 48.1   -14 52 03     2.856    3.434  116.7   15.3   109   14.5 
2026-06-20 00:00 UT   13 20 51.0   -14 51 44     2.869    3.435  115.8   15.5   109   14.5 
2026-06-21 00:00 UT   13 20 55.0   -14 51 31     2.883    3.435  114.8   15.6   109   14.5 
2026-06-22 00:00 UT   13 21 00.2   -14 51 25     2.896    3.436  113.9   15.7   109   14.5 
2026-06-23 00:00 UT   13 21 06.5   -14 51 25     2.910    3.436  113.0   15.8   110   14.5 
2026-06-24 00:00 UT   13 21 14.0   -14 51 30     2.923    3.437  112.0   15.9   110   14.5 
2026-06-25 00:00 UT   13 21 22.6   -14 51 42     2.937    3.437  111.1   16.0   110   14.5 
2026-06-26 00:00 UT   13 21 32.2   -14 51 60     2.951    3.437  110.2   16.1   110   14.6 
2026-06-27 00:00 UT   13 21 43.0   -14 52 23     2.965    3.438  109.3   16.2   110   14.6 
2026-06-28 00:00 UT   13 21 54.8   -14 52 53     2.979    3.438  108.4   16.3   110   14.6 
2026-06-29 00:00 UT   13 22 07.7   -14 53 29     2.993    3.439  107.5   16.4   110   14.6 
2026-06-30 00:00 UT   13 22 21.6   -14 54 10     3.007    3.439  106.6   16.5   110   14.6 
2026-07-01 00:00 UT   13 22 36.6   -14 54 57     3.022    3.440  105.7   16.5   110   14.6 
2026-07-02 00:00 UT   13 22 52.7   -14 55 50     3.036    3.440  104.9   16.6   110   14.6 
2026-07-03 00:00 UT   13 23 09.7   -14 56 49     3.050    3.440  104.0   16.7   111   14.7 
2026-07-04 00:00 UT   13 23 27.8   -14 57 54     3.065    3.441  103.1   16.7   111   14.7 
2026-07-05 00:00 UT   13 23 46.8   -14 59 04     3.079    3.441  102.2   16.8   111   14.7 
2026-07-06 00:00 UT   13 24 06.9   -15 00 20     3.094    3.441  101.4   16.8   111   14.7 
2026-07-07 00:00 UT   13 24 28.0   -15 01 41     3.108    3.442  100.5   16.9   111   14.7 
2026-07-08 00:00 UT   13 24 50.0   -15 03 08     3.123    3.442   99.7   16.9   111   14.7 
2026-07-09 00:00 UT   13 25 13.0   -15 04 40     3.137    3.443   98.8   17.0   111   14.7 
2026-07-10 00:00 UT   13 25 36.9   -15 06 18     3.152    3.443   98.0   17.0   111   14.7 
2026-07-11 00:00 UT   13 26 01.8   -15 08 01     3.167    3.443   97.1   17.0   111   14.8 
2026-07-12 00:00 UT   13 26 27.7   -15 09 50     3.181    3.444   96.3   17.1   111   14.8 
2026-07-13 00:00 UT   13 26 54.4   -15 11 44     3.196    3.444   95.4   17.1   111   14.8 
2026-07-14 00:00 UT   13 27 22.1   -15 13 43     3.211    3.444   94.6   17.1   111   14.8 
2026-07-15 00:00 UT   13 27 50.7   -15 15 47     3.225    3.445   93.8   17.1   111   14.8 
2026-07-16 00:00 UT   13 28 20.2   -15 17 57     3.240    3.445   92.9   17.1   111   14.8 
2026-07-17 00:00 UT   13 28 50.6   -15 20 12     3.255    3.445   92.1   17.1   112   14.8 
2026-07-18 00:00 UT   13 29 21.8   -15 22 31     3.270    3.446   91.3   17.1   112   14.8 

    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.