(81) Terpsichore
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Oct 2026	15.0	3.452 AU	4.349 AU	15h05m	-22°47'	22.7°	6.4°
Opposition	23 Jun 2027	13.3	3.254 AU	2.251 AU	18h09m	-34°44'	168.7°	3.5°

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)      : 51.22995
            M (Mean anomaly)                : 159.60693
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 51.86251
            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
2026-10-22 00:00 UT   15 05 56.5   -22 47 07     4.349    3.452   22.7    6.4   118   15.0 
2026-10-22 17:21 UT   15 06 54.3   -22 50 59     4.352    3.452   22.3    6.3   119   15.0 
2026-10-23 00:00 UT   15 07 16.4   -22 52 29     4.354    3.452   22.1    6.2   119   15.0 
2026-10-24 00:00 UT   15 08 36.5   -22 57 50     4.359    3.452   21.4    6.0   119   15.0 
2026-10-25 00:00 UT   15 09 56.9   -23 03 11     4.363    3.451   20.8    5.9   119   15.0 
2026-10-26 00:00 UT   15 11 17.5   -23 08 30     4.368    3.451   20.1    5.7   120   15.0 
2026-10-27 00:00 UT   15 12 38.4   -23 13 49     4.372    3.451   19.5    5.5   120   15.0 
2026-10-28 00:00 UT   15 13 59.5   -23 19 07     4.377    3.451   18.8    5.3   121   15.0 
2026-10-29 00:00 UT   15 15 20.8   -23 24 24     4.381    3.451   18.2    5.2   121   15.0 
2026-10-30 00:00 UT   15 16 42.3   -23 29 40     4.384    3.450   17.5    5.0   122   15.0 
2026-10-31 00:00 UT   15 18 04.1   -23 34 55     4.388    3.450   16.9    4.8   122   15.0 
2026-11-01 00:00 UT   15 19 26.1   -23 40 09     4.392    3.450   16.3    4.6   123   15.0 
2026-11-02 00:00 UT   15 20 48.3   -23 45 22     4.395    3.450   15.6    4.4   124   14.9 
2026-11-03 00:00 UT   15 22 10.8   -23 50 33     4.398    3.449   15.0    4.3   124   14.9 
2026-11-04 00:00 UT   15 23 33.4   -23 55 44     4.401    3.449   14.4    4.1   125   14.9 
2026-11-05 00:00 UT   15 24 56.3   -24 00 53     4.404    3.449   13.7    3.9   126   14.9 
2026-11-06 00:00 UT   15 26 19.3   -24 06 02     4.407    3.449   13.1    3.7   127   14.9 
2026-11-07 00:00 UT   15 27 42.6   -24 11 08     4.409    3.448   12.5    3.6   128   14.9 
2026-11-08 00:00 UT   15 29 06.0   -24 16 14     4.412    3.448   11.9    3.4   130   14.9 
2026-11-09 00:00 UT   15 30 29.7   -24 21 18     4.414    3.448   11.3    3.2   131   14.9 
2026-11-10 00:00 UT   15 31 53.5   -24 26 21     4.416    3.448   10.7    3.1   133   14.9 
2026-11-11 00:00 UT   15 33 17.5   -24 31 23     4.418    3.447   10.1    2.9   134   14.9 
2026-11-12 00:00 UT   15 34 41.7   -24 36 22     4.419    3.447    9.6    2.7   136   14.9 
2026-11-13 00:00 UT   15 36 06.0   -24 41 21     4.421    3.447    9.0    2.6   139   14.8 
2026-11-14 00:00 UT   15 37 30.5   -24 46 18     4.422    3.446    8.5    2.4   141   14.8 
2026-11-15 00:00 UT   15 38 55.2   -24 51 13     4.423    3.446    7.9    2.3   144   14.8 
2026-11-16 00:00 UT   15 40 20.0   -24 56 07     4.424    3.446    7.5    2.1   148   14.8 
2026-11-17 00:00 UT   15 41 44.9   -25 00 59     4.425    3.445    7.0    2.0   151   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.