(204) Kallisto
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	29 Mar 2026	12.0	2.461 AU	1.464 AU	12h28m	-07°13'	176.1°	1.6°
Today	25 Apr 2026	12.5	2.414 AU	1.495 AU	12h09m	-03°21'	149.1°	12.3°

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)      : 56.95547
            M (Mean anomaly)                : 276.40040
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 261.57870
            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
2026-04-25 00:00 UT   12 09 59.5   -03 21 43     1.495    2.414  149.1   12.3   110   12.5 
2026-04-25 15:52 UT   12 09 41.4   -03 16 43     1.498    2.413  148.4   12.6   110   12.5 
2026-04-26 00:00 UT   12 09 32.3   -03 14 12     1.500    2.412  148.0   12.8   110   12.5 
2026-04-27 00:00 UT   12 09 06.5   -03 06 50     1.504    2.411  146.9   13.2   110   12.5 
2026-04-28 00:00 UT   12 08 42.1   -02 59 38     1.509    2.409  145.8   13.6   111   12.6 
2026-04-29 00:00 UT   12 08 19.3   -02 52 36     1.514    2.407  144.7   14.0   111   12.6 
2026-04-30 00:00 UT   12 07 57.8   -02 45 45     1.520    2.406  143.6   14.4   111   12.6 
2026-05-01 00:00 UT   12 07 37.9   -02 39 05     1.525    2.404  142.5   14.8   111   12.6 
2026-05-02 00:00 UT   12 07 19.6   -02 32 35     1.531    2.402  141.4   15.2   111   12.6 
2026-05-03 00:00 UT   12 07 02.7   -02 26 17     1.537    2.400  140.3   15.5   112   12.7 
2026-05-04 00:00 UT   12 06 47.4   -02 20 09     1.543    2.399  139.3   15.9   112   12.7 
2026-05-05 00:00 UT   12 06 33.7   -02 14 14     1.549    2.397  138.2   16.3   112   12.7 
2026-05-06 00:00 UT   12 06 21.5   -02 08 30     1.556    2.395  137.2   16.6   112   12.7 
2026-05-07 00:00 UT   12 06 11.0   -02 02 57     1.562    2.394  136.1   17.0   112   12.7 
2026-05-08 00:00 UT   12 06 02.0   -01 57 37     1.569    2.392  135.1   17.3   112   12.8 
2026-05-09 00:00 UT   12 05 54.6   -01 52 29     1.576    2.390  134.1   17.7   112   12.8 
2026-05-10 00:00 UT   12 05 48.9   -01 47 33     1.583    2.389  133.0   18.0   112   12.8 
2026-05-11 00:00 UT   12 05 44.7   -01 42 49     1.590    2.387  132.0   18.3   113   12.8 
2026-05-12 00:00 UT   12 05 42.2   -01 38 18     1.598    2.385  131.0   18.6   113   12.8 
2026-05-13 00:00 UT   12 05 41.3   -01 33 59     1.605    2.384  130.0   18.9   113   12.8 
2026-05-14 00:00 UT   12 05 42.0   -01 29 53     1.613    2.382  129.0   19.2   113   12.9 
2026-05-15 00:00 UT   12 05 44.3   -01 25 59     1.621    2.381  128.1   19.5   113   12.9 
2026-05-16 00:00 UT   12 05 48.3   -01 22 18     1.628    2.379  127.1   19.8   113   12.9 
2026-05-17 00:00 UT   12 05 53.8   -01 18 50     1.637    2.377  126.1   20.1   113   12.9 
2026-05-18 00:00 UT   12 06 01.0   -01 15 35     1.645    2.376  125.2   20.4   113   12.9 
2026-05-19 00:00 UT   12 06 09.8   -01 12 32     1.653    2.374  124.2   20.6   113   13.0 
2026-05-20 00:00 UT   12 06 20.2   -01 09 42     1.661    2.372  123.3   20.9   113   13.0 
2026-05-21 00:00 UT   12 06 32.2   -01 07 04     1.670    2.371  122.3   21.1   113   13.0 
2026-05-22 00:00 UT   12 06 45.8   -01 04 40     1.679    2.369  121.4   21.4   113   13.0 
2026-05-23 00:00 UT   12 07 01.0   -01 02 27     1.687    2.368  120.5   21.6   113   13.0 
2026-05-24 00:00 UT   12 07 17.7   -01 00 27     1.696    2.366  119.6   21.9   113   13.0 
2026-05-25 00:00 UT   12 07 36.0   +00 58 40     1.705    2.364  118.7   22.1   113   13.1 

    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.