(423) Diotima
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Jan 2025	13.4	3.061 AU	3.608 AU	23h13m	-14°47'	49.5°	14.1°
Opposition	14 Nov 2025	11.7	3.149 AU	2.162 AU	03h23m	+13°29'	175.1°	1.6°

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 Diotima are:

            e (Eccentricity)                : 0.0341903
            a (Semimajor axis)              : 3.0667378
            i (Inclination)                 : 11.24282
            Ω (Longitude of ascending node) : 69.35028
            ω (Argument of perihelion)      : 199.23999
            M (Mean anomaly)                : 68.47316
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 88.24748
            B (Latitude of perihelion)      : -3.68361
            P (Orbital period in years)     : 5.37            
        

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
2025-01-15 00:00 UT   23 13 45.9   -14 47 32     3.608    3.061   49.5   14.1    75   13.4 
2025-01-15 11:22 UT   23 14 20.4   -14 42 50     3.613    3.061   49.1   14.1    75   13.4 
2025-01-16 00:00 UT   23 14 58.9   -14 37 36     3.619    3.061   48.8   14.0    75   13.4 
2025-01-17 00:00 UT   23 16 12.1   -14 27 38     3.630    3.062   48.1   13.8    75   13.4 
2025-01-18 00:00 UT   23 17 25.6   -14 17 40     3.640    3.062   47.5   13.7    75   13.4 
2025-01-19 00:00 UT   23 18 39.4   -14 07 40     3.651    3.062   46.8   13.5    75   13.4 
2025-01-20 00:00 UT   23 19 53.5   -13 57 39     3.661    3.063   46.1   13.4    75   13.4 
2025-01-21 00:00 UT   23 21 07.8   -13 47 37     3.672    3.063   45.5   13.2    75   13.4 
2025-01-22 00:00 UT   23 22 22.4   -13 37 34     3.682    3.064   44.8   13.1    76   13.4 
2025-01-23 00:00 UT   23 23 37.3   -13 27 30     3.692    3.064   44.2   12.9    76   13.4 
2025-01-24 00:00 UT   23 24 52.4   -13 17 25     3.702    3.064   43.5   12.8    76   13.4 
2025-01-25 00:00 UT   23 26 07.8   -13 07 19     3.712    3.065   42.8   12.6    76   13.4 
2025-01-26 00:00 UT   23 27 23.4   -12 57 12     3.722    3.065   42.2   12.5    76   13.4 
2025-01-27 00:00 UT   23 28 39.2   -12 47 04     3.732    3.065   41.5   12.3    76   13.4 
2025-01-28 00:00 UT   23 29 55.3   -12 36 56     3.741    3.066   40.9   12.1    77   13.4 
2025-01-29 00:00 UT   23 31 11.6   -12 26 47     3.751    3.066   40.2   12.0    77   13.4 
2025-01-30 00:00 UT   23 32 28.1   -12 16 37     3.760    3.066   39.6   11.8    77   13.4 
2025-01-31 00:00 UT   23 33 44.8   -12 06 26     3.770    3.067   38.9   11.7    77   13.4 
2025-02-01 00:00 UT   23 35 01.7   -11 56 15     3.779    3.067   38.3   11.5    77   13.4 
2025-02-02 00:00 UT   23 36 18.8   -11 46 04     3.788    3.067   37.7   11.3    78   13.4 
2025-02-03 00:00 UT   23 37 36.1   -11 35 51     3.797    3.068   37.0   11.2    78   13.4 
2025-02-04 00:00 UT   23 38 53.6   -11 25 39     3.805    3.068   36.4   11.0    78   13.4 
2025-02-05 00:00 UT   23 40 11.3   -11 15 26     3.814    3.068   35.7   10.8    78   13.4 
2025-02-06 00:00 UT   23 41 29.1   -11 05 12     3.822    3.069   35.1   10.7    78   13.4 
2025-02-07 00:00 UT   23 42 47.2   -10 54 58     3.831    3.069   34.5   10.5    79   13.4 
2025-02-08 00:00 UT   23 44 05.3   -10 44 44     3.839    3.069   33.8   10.3    79   13.4 

    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.