(22) Kalliope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	8 Aug 2025	11.4	2.838 AU	2.033 AU	00h22m	-18°32'	134.5°	14.7°
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
2025-08-08 00:00 UT   00 22 08.2   -18 32 42     2.033    2.838  134.5   14.7   265   11.4 
2025-08-08 08:42 UT   00 22 05.1   -18 34 49     2.030    2.838  134.9   14.7   265   11.4 
2025-08-09 00:00 UT   00 21 59.2   -18 38 34     2.024    2.837  135.4   14.5   266   11.4 
2025-08-10 00:00 UT   00 21 48.6   -18 44 30     2.015    2.836  136.3   14.3   267   11.4 
2025-08-11 00:00 UT   00 21 36.6   -18 50 31     2.007    2.835  137.2   14.0   268   11.4 
2025-08-12 00:00 UT   00 21 23.1   -18 56 36     1.998    2.834  138.1   13.8   268   11.3 
2025-08-13 00:00 UT   00 21 08.1   -19 02 44     1.990    2.833  139.0   13.6   269   11.3 
2025-08-14 00:00 UT   00 20 51.7   -19 08 56     1.981    2.832  139.9   13.3   270   11.3 
2025-08-15 00:00 UT   00 20 33.8   -19 15 11     1.973    2.831  140.8   13.1   271   11.3 
2025-08-16 00:00 UT   00 20 14.4   -19 21 28     1.966    2.830  141.7   12.8   272   11.3 
2025-08-17 00:00 UT   00 19 53.6   -19 27 48     1.958    2.829  142.5   12.6   273   11.3 
2025-08-18 00:00 UT   00 19 31.3   -19 34 10     1.950    2.828  143.4   12.3   274   11.2 
2025-08-19 00:00 UT   00 19 07.6   -19 40 33     1.943    2.827  144.3   12.1   275   11.2 
2025-08-20 00:00 UT   00 18 42.4   -19 46 57     1.936    2.826  145.2   11.8   276   11.2 
2025-08-21 00:00 UT   00 18 15.9   -19 53 22     1.929    2.825  146.0   11.5   278   11.2 
2025-08-22 00:00 UT   00 17 47.9   -19 59 48     1.923    2.824  146.9   11.3   279   11.2 
2025-08-23 00:00 UT   00 17 18.6   -20 06 13     1.917    2.823  147.7   11.0   280   11.1 
2025-08-24 00:00 UT   00 16 47.9   -20 12 37     1.910    2.823  148.5   10.8   282   11.1 
2025-08-25 00:00 UT   00 16 15.9   -20 19 00     1.904    2.822  149.3   10.5   283   11.1 
2025-08-26 00:00 UT   00 15 42.6   -20 25 22     1.899    2.821  150.1   10.3   285   11.1 
2025-08-27 00:00 UT   00 15 08.1   -20 31 41     1.893    2.820  150.9   10.0   287   11.1 
2025-08-28 00:00 UT   00 14 32.2   -20 37 58     1.888    2.819  151.7    9.8   288   11.1 
2025-08-29 00:00 UT   00 13 55.2   -20 44 12     1.883    2.818  152.5    9.5   290   11.0 
2025-08-30 00:00 UT   00 13 17.0   -20 50 23     1.878    2.817  153.2    9.3   292   11.0 
2025-08-31 00:00 UT   00 12 37.6   -20 56 29     1.874    2.816  153.9    9.1   294   11.0 
2025-09-01 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 

    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.