(53) Kalypso
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	14.5	2.752 AU	3.091 AU	21h46m	-14°57'	61.0°	18.2°
Opposition	18 Dec 2026	11.1	2.094 AU	1.116 AU	05h44m	+15°11'	171.8°	3.8°

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 Kalypso are:

            e (Eccentricity)                : 0.2029884
            a (Semimajor axis)              : 2.6185784
            i (Inclination)                 : 5.18194
            Ω (Longitude of ascending node) : 143.43434
            ω (Argument of perihelion)      : 314.39066
            M (Mean anomaly)                : 261.11414
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 97.94230
            B (Latitude of perihelion)      : -3.70047
            P (Orbital period in years)     : 4.24            
        

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
2025-12-15 00:00 UT   21 46 52.9   -14 57 12     3.091    2.752   61.0   18.2    71   14.5 
2025-12-15 07:42 UT   21 47 17.3   -14 55 19     3.094    2.752   60.8   18.2    71   14.5 
2025-12-16 00:00 UT   21 48 09.1   -14 51 18     3.101    2.750   60.3   18.1    71   14.5 
2025-12-17 00:00 UT   21 49 25.8   -14 45 20     3.111    2.748   59.6   18.0    71   14.5 
2025-12-18 00:00 UT   21 50 43.1   -14 39 18     3.121    2.746   58.9   17.9    71   14.5 
2025-12-19 00:00 UT   21 52 00.8   -14 33 11     3.131    2.744   58.2   17.8    71   14.5 
2025-12-20 00:00 UT   21 53 19.1   -14 26 59     3.141    2.742   57.6   17.6    71   14.5 
2025-12-21 00:00 UT   21 54 37.8   -14 20 42     3.151    2.740   56.9   17.5    71   14.5 
2025-12-22 00:00 UT   21 55 57.1   -14 14 22     3.161    2.738   56.2   17.4    71   14.5 
2025-12-23 00:00 UT   21 57 16.8   -14 07 56     3.170    2.736   55.5   17.2    71   14.5 
2025-12-24 00:00 UT   21 58 37.0   -14 01 27     3.180    2.734   54.8   17.1    71   14.5 
2025-12-25 00:00 UT   21 59 57.6   -13 54 53     3.189    2.732   54.2   17.0    71   14.5 
2025-12-26 00:00 UT   22 01 18.7   -13 48 14     3.198    2.730   53.5   16.8    71   14.5 
2025-12-27 00:00 UT   22 02 40.2   -13 41 32     3.207    2.728   52.8   16.7    71   14.5 
2025-12-28 00:00 UT   22 04 02.1   -13 34 45     3.216    2.726   52.2   16.6    71   14.5 
2025-12-29 00:00 UT   22 05 24.5   -13 27 53     3.225    2.724   51.5   16.4    71   14.5 
2025-12-30 00:00 UT   22 06 47.2   -13 20 58     3.234    2.722   50.8   16.3    71   14.5 
2025-12-31 00:00 UT   22 08 10.4   -13 13 59     3.243    2.720   50.2   16.1    71   14.5 
2026-01-01 00:00 UT   22 09 33.9   -13 06 55     3.252    2.718   49.5   16.0    71   14.5 
2026-01-02 00:00 UT   22 10 57.8   -12 59 48     3.260    2.716   48.9   15.8    71   14.5 
2026-01-03 00:00 UT   22 12 22.1   -12 52 36     3.268    2.714   48.2   15.7    71   14.5 
2026-01-04 00:00 UT   22 13 46.8   -12 45 21     3.277    2.712   47.5   15.5    71   14.5 
2026-01-05 00:00 UT   22 15 11.8   -12 38 01     3.285    2.710   46.9   15.4    71   14.5 
2026-01-06 00:00 UT   22 16 37.2   -12 30 38     3.293    2.708   46.2   15.2    71   14.5 
2026-01-07 00:00 UT   22 18 02.9   -12 23 11     3.301    2.706   45.6   15.0    71   14.5 
2026-01-08 00:00 UT   22 19 29.0   -12 15 40     3.309    2.704   44.9   14.9    71   14.5 

    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.