(22) Kalliope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	13 Sep 2025	10.9	2.803 AU	1.838 AU	00h02m	-22°08'	159.5°	7.2°
Today	18 Sep 2025	10.9	2.798 AU	1.836 AU	23h58m	-22°26'	159.1°	7.3°

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 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
2025-09-18 00:00 UT   23 58 23.0   -22 26 23     1.836    2.798  159.1    7.3   348   10.9 
2025-09-18 02:55 UT   23 58 16.6   -22 26 49     1.836    2.798  159.1    7.4   349   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 
2025-10-01 00:00 UT   23 47 07.9   -22 53 49     1.861    2.786  152.2    9.7    23   11.0 
2025-10-02 00:00 UT   23 46 18.5   -22 54 17     1.865    2.785  151.4    9.9    24   11.0 
2025-10-03 00:00 UT   23 45 29.7   -22 54 30     1.869    2.784  150.6   10.2    26   11.0 
2025-10-04 00:00 UT   23 44 41.6   -22 54 29     1.873    2.783  149.8   10.4    28   11.0 
2025-10-05 00:00 UT   23 43 54.3   -22 54 12     1.877    2.782  148.9   10.7    29   11.1 
2025-10-06 00:00 UT   23 43 07.8   -22 53 42     1.882    2.781  148.1   11.0    31   11.1 
2025-10-07 00:00 UT   23 42 22.2   -22 52 56     1.887    2.780  147.2   11.2    32   11.1 
2025-10-08 00:00 UT   23 41 37.4   -22 51 57     1.892    2.779  146.4   11.5    34   11.1 
2025-10-09 00:00 UT   23 40 53.5   -22 50 42     1.897    2.778  145.5   11.8    35   11.1 
2025-10-10 00:00 UT   23 40 10.7   -22 49 13     1.903    2.778  144.6   12.0    36   11.1 
2025-10-11 00:00 UT   23 39 28.9   -22 47 30     1.908    2.777  143.7   12.3    38   11.1 
2025-10-12 00:00 UT   23 38 48.1   -22 45 33     1.914    2.776  142.8   12.6    39   11.2 
2025-10-13 00:00 UT   23 38 08.4   -22 43 22     1.920    2.775  141.9   12.8    40   11.2 
2025-10-14 00:00 UT   23 37 29.9   -22 40 56     1.927    2.774  141.0   13.1    41   11.2 
2025-10-15 00:00 UT   23 36 52.5   -22 38 17     1.933    2.773  140.1   13.4    42   11.2 
2025-10-16 00:00 UT   23 36 16.3   -22 35 24     1.940    2.772  139.1   13.6    43   11.2 
2025-10-17 00:00 UT   23 35 41.4   -22 32 17     1.947    2.771  138.2   13.9    44   11.2 
2025-10-18 00:00 UT   23 35 07.7   -22 28 56     1.954    2.770  137.3   14.1    45   11.3 

    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.