(204) Kallisto
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Nov 2025	14.5	2.700 AU	3.029 AU	11h41m	-03°49'	61.4°	18.8°
Opposition	29 Mar 2026	12.0	2.461 AU	1.464 AU	12h28m	-07°13'	176.1°	1.6°

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 Kallisto are:

            e (Eccentricity)                : 0.1760366
            a (Semimajor axis)              : 2.6698134
            i (Inclination)                 : 8.27072
            Ω (Longitude of ascending node) : 204.89762
            ω (Argument of perihelion)      : 56.95546
            M (Mean anomaly)                : 276.40040
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 261.57869
            B (Latitude of perihelion)      : 6.92571
            P (Orbital period in years)     : 4.36            
        

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
2025-11-21 00:00 UT   11 41 23.5   -03 49 36     3.029    2.700   61.4   18.8   291   14.5 
2025-11-21 21:36 UT   11 42 32.3   -03 57 08     3.016    2.698   62.0   18.9   291   14.5 
2025-11-22 00:00 UT   11 42 39.9   -03 57 58     3.015    2.698   62.1   18.9   291   14.5 
2025-11-23 00:00 UT   11 43 55.9   -04 06 19     3.001    2.696   62.8   19.0   291   14.5 
2025-11-24 00:00 UT   11 45 11.6   -04 14 38     2.987    2.694   63.4   19.1   291   14.5 
2025-11-25 00:00 UT   11 46 26.9   -04 22 55     2.973    2.693   64.1   19.3   291   14.5 
2025-11-26 00:00 UT   11 47 41.8   -04 31 09     2.959    2.691   64.8   19.4   291   14.5 
2025-11-27 00:00 UT   11 48 56.3   -04 39 21     2.945    2.689   65.4   19.5   291   14.5 
2025-11-28 00:00 UT   11 50 10.3   -04 47 31     2.931    2.687   66.1   19.6   291   14.4 
2025-11-29 00:00 UT   11 51 24.0   -04 55 38     2.917    2.685   66.8   19.7   291   14.4 
2025-11-30 00:00 UT   11 52 37.2   -05 03 42     2.902    2.683   67.4   19.8   291   14.4 
2025-12-01 00:00 UT   11 53 50.0   -05 11 44     2.888    2.681   68.1   20.0   291   14.4 
2025-12-02 00:00 UT   11 55 02.4   -05 19 43     2.874    2.680   68.8   20.1   291   14.4 
2025-12-03 00:00 UT   11 56 14.3   -05 27 40     2.859    2.678   69.5   20.2   292   14.4 
2025-12-04 00:00 UT   11 57 25.8   -05 35 33     2.845    2.676   70.2   20.3   292   14.4 
2025-12-05 00:00 UT   11 58 36.8   -05 43 24     2.830    2.674   70.9   20.4   292   14.4 
2025-12-06 00:00 UT   11 59 47.3   -05 51 12     2.815    2.672   71.5   20.5   292   14.4 
2025-12-07 00:00 UT   12 00 57.3   -05 58 56     2.801    2.670   72.2   20.6   292   14.4 
2025-12-08 00:00 UT   12 02 06.9   -06 06 37     2.786    2.669   72.9   20.7   292   14.4 
2025-12-09 00:00 UT   12 03 16.0   -06 14 16     2.771    2.667   73.6   20.8   292   14.3 
2025-12-10 00:00 UT   12 04 24.5   -06 21 50     2.756    2.665   74.3   20.8   292   14.3 
2025-12-11 00:00 UT   12 05 32.5   -06 29 22     2.742    2.663   75.0   20.9   292   14.3 
2025-12-12 00:00 UT   12 06 40.0   -06 36 49     2.727    2.661   75.7   21.0   292   14.3 
2025-12-13 00:00 UT   12 07 46.9   -06 44 13     2.712    2.659   76.5   21.1   292   14.3 
2025-12-14 00:00 UT   12 08 53.3   -06 51 33     2.697    2.657   77.2   21.2   292   14.3 
2025-12-15 00:00 UT   12 09 59.1   -06 58 50     2.682    2.656   77.9   21.2   292   14.3 
2025-12-16 00:00 UT   12 11 04.3   -07 06 02     2.667    2.654   78.6   21.3   292   14.3 
2025-12-17 00:00 UT   12 12 08.9   -07 13 10     2.652    2.652   79.3   21.4   292   14.3 

    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.