(204) Kallisto
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Mar 2026	12.0	2.464 AU	1.468 AU	12h29m	-07°26'	175.2°	1.9°
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)      : 56.95547
            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
2026-03-28 00:00 UT   12 29 15.0   -07 26 19     1.468    2.464  175.2    1.9   349   12.0 
2026-03-28 13:56 UT   12 28 47.6   -07 21 15     1.466    2.463  175.6    1.8   356   12.0 
2026-03-29 00:00 UT   12 28 27.8   -07 17 35     1.465    2.462  175.9    1.7     3   12.0 
2026-03-30 00:00 UT   12 27 40.5   -07 08 46     1.463    2.460  176.2    1.6    20   12.0 
2026-03-31 00:00 UT   12 26 53.2   -06 59 53     1.461    2.458  176.1    1.6    38   12.0 
2026-04-01 00:00 UT   12 26 05.9   -06 50 56     1.459    2.456  175.7    1.8    54   12.0 
2026-04-02 00:00 UT   12 25 18.7   -06 41 56     1.457    2.455  175.0    2.0    67   12.0 
2026-04-03 00:00 UT   12 24 31.7   -06 32 53     1.456    2.453  174.1    2.4    76   12.0 
2026-04-04 00:00 UT   12 23 44.9   -06 23 48     1.455    2.451  173.1    2.8    83   12.0 
2026-04-05 00:00 UT   12 22 58.3   -06 14 42     1.455    2.449  172.1    3.2    88   12.0 
2026-04-06 00:00 UT   12 22 12.1   -06 05 35     1.454    2.447  171.0    3.7    91   12.1 
2026-04-07 00:00 UT   12 21 26.3   -05 56 27     1.454    2.446  169.9    4.1    94   12.1 
2026-04-08 00:00 UT   12 20 41.0   -05 47 19     1.454    2.444  168.8    4.6    97   12.1 
2026-04-09 00:00 UT   12 19 56.2   -05 38 13     1.455    2.442  167.6    5.0    99   12.1 
2026-04-10 00:00 UT   12 19 12.0   -05 29 07     1.455    2.440  166.4    5.5   100   12.2 
2026-04-11 00:00 UT   12 18 28.4   -05 20 04     1.456    2.439  165.3    6.0   102   12.2 
2026-04-12 00:00 UT   12 17 45.6   -05 11 03     1.457    2.437  164.1    6.5   103   12.2 
2026-04-13 00:00 UT   12 17 03.5   -05 02 05     1.459    2.435  163.0    6.9   104   12.2 
2026-04-14 00:00 UT   12 16 22.3   -04 53 10     1.460    2.433  161.8    7.4   105   12.3 
2026-04-15 00:00 UT   12 15 42.0   -04 44 20     1.462    2.432  160.6    7.9   105   12.3 
2026-04-16 00:00 UT   12 15 02.6   -04 35 35     1.465    2.430  159.4    8.3   106   12.3 
2026-04-17 00:00 UT   12 14 24.3   -04 26 55     1.467    2.428  158.3    8.8   107   12.3 
2026-04-18 00:00 UT   12 13 47.0   -04 18 20     1.470    2.426  157.1    9.3   107   12.3 
2026-04-19 00:00 UT   12 13 10.8   -04 09 52     1.473    2.425  156.0    9.7   108   12.4 
2026-04-20 00:00 UT   12 12 35.8   -04 01 31     1.476    2.423  154.8   10.2   108   12.4 
2026-04-21 00:00 UT   12 12 01.9   -03 53 17     1.479    2.421  153.7   10.6   109   12.4 
2026-04-22 00:00 UT   12 11 29.4   -03 45 11     1.483    2.419  152.5   11.1   109   12.4 
2026-04-23 00:00 UT   12 10 58.1   -03 37 13     1.487    2.418  151.4   11.5   109   12.5 
2026-04-24 00:00 UT   12 10 28.1   -03 29 23     1.491    2.416  150.2   11.9   110   12.5 
2026-04-25 00:00 UT   12 09 59.5   -03 21 43     1.495    2.414  149.1   12.3   110   12.5 
2026-04-26 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 

    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.