(22) Kalliope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Jul 2025	11.9	2.864 AU	2.321 AU	00h17m	-16°37'	112.2°	19.2°
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
2025-07-13 00:00 UT   00 17 48.6   -16 37 48     2.321    2.864  112.2   19.2   253   11.9 
2025-07-13 20:22 UT   00 18 11.1   -16 40 11     2.311    2.863  112.9   19.1   253   11.9 
2025-07-14 00:00 UT   00 18 15.1   -16 40 37     2.309    2.863  113.0   19.1   253   11.9 
2025-07-15 00:00 UT   00 18 40.3   -16 43 35     2.296    2.862  113.8   19.0   253   11.8 
2025-07-16 00:00 UT   00 19 04.4   -16 46 40     2.284    2.861  114.6   18.8   254   11.8 
2025-07-17 00:00 UT   00 19 27.2   -16 49 54     2.272    2.860  115.5   18.7   254   11.8 
2025-07-18 00:00 UT   00 19 48.8   -16 53 16     2.260    2.859  116.3   18.6   254   11.8 
2025-07-19 00:00 UT   00 20 09.1   -16 56 46     2.248    2.858  117.1   18.4   255   11.8 
2025-07-20 00:00 UT   00 20 28.2   -17 00 25     2.236    2.857  118.0   18.3   255   11.8 
2025-07-21 00:00 UT   00 20 45.9   -17 04 11     2.224    2.856  118.8   18.2   256   11.7 
2025-07-22 00:00 UT   00 21 02.3   -17 08 06     2.212    2.855  119.7   18.0   256   11.7 
2025-07-23 00:00 UT   00 21 17.3   -17 12 08     2.201    2.854  120.5   17.9   256   11.7 
2025-07-24 00:00 UT   00 21 31.1   -17 16 18     2.189    2.853  121.4   17.7   257   11.7 
2025-07-25 00:00 UT   00 21 43.4   -17 20 36     2.178    2.852  122.2   17.5   257   11.7 
2025-07-26 00:00 UT   00 21 54.4   -17 25 01     2.167    2.851  123.1   17.4   258   11.7 
2025-07-27 00:00 UT   00 22 04.0   -17 29 34     2.156    2.850  124.0   17.2   258   11.6 
2025-07-28 00:00 UT   00 22 12.2   -17 34 14     2.145    2.849  124.8   17.0   259   11.6 
2025-07-29 00:00 UT   00 22 19.0   -17 39 01     2.134    2.848  125.7   16.8   259   11.6 
2025-07-30 00:00 UT   00 22 24.4   -17 43 55     2.123    2.847  126.6   16.6   260   11.6 
2025-07-31 00:00 UT   00 22 28.4   -17 48 56     2.112    2.846  127.5   16.4   260   11.6 
2025-08-01 00:00 UT   00 22 30.9   -17 54 04     2.102    2.845  128.3   16.2   261   11.6 
2025-08-02 00:00 UT   00 22 32.1   -17 59 17     2.092    2.844  129.2   16.0   261   11.5 
2025-08-03 00:00 UT   00 22 31.7   -18 04 37     2.082    2.843  130.1   15.8   262   11.5 
2025-08-04 00:00 UT   00 22 29.9   -18 10 03     2.072    2.842  131.0   15.6   263   11.5 
2025-08-05 00:00 UT   00 22 26.7   -18 15 35     2.062    2.841  131.9   15.4   263   11.5 
2025-08-06 00:00 UT   00 22 22.0   -18 21 12     2.052    2.840  132.8   15.2   264   11.5 
2025-08-07 00:00 UT   00 22 15.9   -18 26 54     2.043    2.839  133.7   15.0   265   11.4 
2025-08-08 00:00 UT   00 22 08.2   -18 32 42     2.033    2.838  134.5   14.7   265   11.4 
2025-08-09 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 

    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.