(22) Kalliope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Aug 2025	11.0	2.816 AU	1.874 AU	00h12m	-20°56'	153.9°	9.1°
Opposition	13 Sep 2025	10.9	2.803 AU	1.838 AU	00h02m	-22°08'	159.5°	7.2°

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)                : 0.0989148
            a (Semimajor axis)              : 2.9100537
            i (Inclination)                 : 13.70152
            Ω (Longitude of ascending node) : 65.97105
            ω (Argument of perihelion)      : 358.12033
            M (Mean anomaly)                : 271.06604
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 64.14483
            B (Latitude of perihelion)      : -0.44515
            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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-08-31 00:00 UT   00 12 37.6   -20 56 29     1.874    2.816  153.9    9.1   294   11.0 
2025-08-31 04:43 UT   00 12 29.8   -20 57 41     1.873    2.815  154.0    9.0   295   11.0 
2025-09-01 00:00 UT   00 11 57.2   -21 02 31     1.870    2.815  154.6    8.9   296   11.0 
2025-09-02 00:00 UT   00 11 15.7   -21 08 28     1.866    2.814  155.2    8.6   299   11.0 
2025-09-03 00:00 UT   00 10 33.1   -21 14 19     1.862    2.813  155.8    8.4   301   11.0 
2025-09-04 00:00 UT   00 09 49.6   -21 20 05     1.858    2.812  156.4    8.3   304   11.0 
2025-09-05 00:00 UT   00 09 05.1   -21 25 44     1.855    2.811  156.9    8.1   306   10.9 
2025-09-06 00:00 UT   00 08 19.8   -21 31 17     1.852    2.810  157.4    7.9   309   10.9 
2025-09-07 00:00 UT   00 07 33.6   -21 36 42     1.849    2.809  157.9    7.8   312   10.9 
2025-09-08 00:00 UT   00 06 46.5   -21 41 59     1.847    2.808  158.3    7.6   315   10.9 
2025-09-09 00:00 UT   00 05 58.7   -21 47 09     1.845    2.807  158.7    7.5   318   10.9 
2025-09-10 00:00 UT   00 05 10.3   -21 52 10     1.843    2.806  159.0    7.4   321   10.9 
2025-09-11 00:00 UT   00 04 21.1   -21 57 02     1.841    2.805  159.2    7.3   324   10.9 
2025-09-12 00:00 UT   00 03 31.3   -22 01 45     1.840    2.804  159.4    7.3   328   10.9 
2025-09-13 00:00 UT   00 02 41.0   -22 06 18     1.838    2.803  159.5    7.2   331   10.9 
2025-09-14 00:00 UT   00 01 50.2   -22 10 41     1.837    2.802  159.6    7.2   335   10.9 
2025-09-15 00:00 UT   00 00 58.9   -22 14 53     1.837    2.801  159.5    7.2   338   10.9 
2025-09-16 00:00 UT   00 00 07.2   -22 18 55     1.836    2.800  159.5    7.2   341   10.9 
2025-09-17 00:00 UT   23 59 15.2   -22 22 45     1.836    2.799  159.3    7.3   345   10.9 
2025-09-18 00:00 UT   23 58 23.0   -22 26 23     1.836    2.798  159.1    7.3   348   10.9 
2025-09-19 00:00 UT   23 57 30.5   -22 29 50     1.837    2.797  158.9    7.4   351   10.9 
2025-09-20 00:00 UT   23 56 37.9   -22 33 04     1.837    2.796  158.6    7.5   355   10.9 
2025-09-21 00:00 UT   23 55 45.2   -22 36 05     1.838    2.795  158.2    7.7   358   10.9 
2025-09-22 00:00 UT   23 54 52.5   -22 38 54     1.839    2.794  157.8    7.8     1   10.9 
2025-09-23 00:00 UT   23 53 59.8   -22 41 29     1.841    2.794  157.3    8.0     4   10.9 
2025-09-24 00:00 UT   23 53 07.3   -22 43 51     1.842    2.793  156.8    8.1     6   10.9 
2025-09-25 00:00 UT   23 52 14.9   -22 45 59     1.844    2.792  156.2    8.3     9   10.9 
2025-09-26 00:00 UT   23 51 22.8   -22 47 53     1.846    2.791  155.6    8.5    12   10.9 
2025-09-27 00:00 UT   23 50 31.0   -22 49 33     1.849    2.790  155.0    8.7    14   10.9 
2025-09-28 00:00 UT   23 49 39.5   -22 50 58     1.852    2.789  154.3    9.0    16   11.0 
2025-09-29 00:00 UT   23 48 48.5   -22 52 10     1.854    2.788  153.6    9.2    18   11.0 
2025-09-30 00:00 UT   23 47 57.9   -22 53 07     1.858    2.787  152.9    9.4    21   11.0 

    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.