(22) Kalliope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Dec 2025	12.2	2.708 AU	2.781 AU	23h56m	-11°43'	75.5°	20.6°
Opposition	2 Jan 2027	10.5	2.673 AU	1.705 AU	06h56m	+35°36'	167.2°	4.7°

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 Kalliope are:

            e (Eccentricity)                : 0.0988798
            a (Semimajor axis)              : 2.9094657
            i (Inclination)                 : 13.70168
            Ω (Longitude of ascending node) : 65.96712
            ω (Argument of perihelion)      : 358.23621
            M (Mean anomaly)                : 310.67004
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 64.25349
            B (Latitude of perihelion)      : -0.41772
            P (Orbital period in years)     : 4.96            
        

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
2025-12-31 00:00 UT   23 56 22.2   -11 43 07     2.781    2.708   75.5   20.6    69   12.2 
2025-12-31 18:39 UT   23 57 07.3   -11 34 03     2.790    2.707   75.0   20.5    69   12.2 
2026-01-01 00:00 UT   23 57 20.3   -11 31 27     2.793    2.707   74.8   20.5    69   12.2 
2026-01-02 00:00 UT   23 58 19.1   -11 19 45     2.805    2.706   74.1   20.5    69   12.2 
2026-01-03 00:00 UT   23 59 18.7   -11 08 02     2.817    2.705   73.4   20.4    69   12.2 
2026-01-04 00:00 UT   00 00 18.9   -10 56 16     2.829    2.705   72.7   20.3    69   12.2 
2026-01-05 00:00 UT   00 01 19.9   -10 44 29     2.841    2.704   72.0   20.2    69   12.2 
2026-01-06 00:00 UT   00 02 21.5   -10 32 39     2.853    2.703   71.3   20.2    70   12.2 
2026-01-07 00:00 UT   00 03 23.8   -10 20 48     2.865    2.702   70.6   20.1    70   12.2 
2026-01-08 00:00 UT   00 04 26.7   -10 08 56     2.877    2.702   69.9   20.0    70   12.2 
2026-01-09 00:00 UT   00 05 30.3   -09 57 01     2.888    2.701   69.2   19.9    70   12.2 
2026-01-10 00:00 UT   00 06 34.5   -09 45 05     2.900    2.700   68.5   19.8    70   12.3 
2026-01-11 00:00 UT   00 07 39.3   -09 33 08     2.912    2.699   67.8   19.7    70   12.3 
2026-01-12 00:00 UT   00 08 44.8   -09 21 08     2.923    2.699   67.2   19.6    70   12.3 
2026-01-13 00:00 UT   00 09 50.9   -09 09 08     2.935    2.698   66.5   19.5    70   12.3 
2026-01-14 00:00 UT   00 10 57.5   -08 57 06     2.947    2.697   65.8   19.4    70   12.3 
2026-01-15 00:00 UT   00 12 04.8   -08 45 02     2.958    2.696   65.1   19.3    71   12.3 
2026-01-16 00:00 UT   00 13 12.6   -08 32 58     2.969    2.696   64.5   19.2    71   12.3 
2026-01-17 00:00 UT   00 14 21.1   -08 20 52     2.981    2.695   63.8   19.1    71   12.3 
2026-01-18 00:00 UT   00 15 30.0   -08 08 44     2.992    2.694   63.1   19.0    71   12.3 
2026-01-19 00:00 UT   00 16 39.6   -07 56 36     3.003    2.694   62.5   18.9    71   12.3 
2026-01-20 00:00 UT   00 17 49.6   -07 44 27     3.014    2.693   61.8   18.8    71   12.3 
2026-01-21 00:00 UT   00 19 00.3   -07 32 16     3.025    2.692   61.1   18.7    71   12.3 
2026-01-22 00:00 UT   00 20 11.4   -07 20 05     3.036    2.691   60.5   18.6    71   12.3 
2026-01-23 00:00 UT   00 21 23.0   -07 07 52     3.047    2.691   59.8   18.4    71   12.3 
2026-01-24 00:00 UT   00 22 35.2   -06 55 39     3.058    2.690   59.2   18.3    72   12.3 
2026-01-25 00:00 UT   00 23 47.9   -06 43 25     3.069    2.689   58.5   18.2    72   12.3 

    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.