(409) Aspasia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Jan 2025	11.7	2.567 AU	1.741 AU	10h20m	-07°34'	139.0°	14.6°
Opposition	21 Feb 2025	11.2	2.543 AU	1.585 AU	09h56m	-06°59'	161.7°	7.0°

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 Aspasia are:

            e (Eccentricity)                : 0.0730608
            a (Semimajor axis)              : 2.5749532
            i (Inclination)                 : 11.28550
            Ω (Longitude of ascending node) : 242.05282
            ω (Argument of perihelion)      : 355.70148
            M (Mean anomaly)                : 253.51860
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 237.83711
            B (Latitude of perihelion)      : -0.84045
            P (Orbital period in years)     : 4.13            
        

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
2025-01-22 00:00 UT   10 20 27.6   -07 34 32     1.741    2.567  139.0   14.6   312   11.7 
2025-01-22 05:08 UT   10 20 20.9   -07 35 04     1.739    2.567  139.3   14.5   312   11.7 
2025-01-23 00:00 UT   10 19 55.9   -07 36 58     1.733    2.566  140.0   14.3   313   11.7 
2025-01-24 00:00 UT   10 19 22.8   -07 39 10     1.724    2.565  141.0   14.0   314   11.7 
2025-01-25 00:00 UT   10 18 48.4   -07 41 08     1.716    2.564  142.0   13.7   315   11.7 
2025-01-26 00:00 UT   10 18 12.6   -07 42 52     1.708    2.564  143.0   13.4   316   11.7 
2025-01-27 00:00 UT   10 17 35.4   -07 44 21     1.701    2.563  143.9   13.1   317   11.6 
2025-01-28 00:00 UT   10 16 57.0   -07 45 36     1.693    2.562  144.9   12.8   318   11.6 
2025-01-29 00:00 UT   10 16 17.3   -07 46 36     1.686    2.561  145.9   12.5   319   11.6 
2025-01-30 00:00 UT   10 15 36.4   -07 47 21     1.679    2.561  146.8   12.2   320   11.6 
2025-01-31 00:00 UT   10 14 54.3   -07 47 51     1.672    2.560  147.8   11.8   322   11.5 
2025-02-01 00:00 UT   10 14 11.0   -07 48 06     1.665    2.559  148.7   11.5   323   11.5 
2025-02-02 00:00 UT   10 13 26.7   -07 48 06     1.659    2.558  149.6   11.2   325   11.5 
2025-02-03 00:00 UT   10 12 41.4   -07 47 51     1.653    2.557  150.6   10.9   326   11.5 
2025-02-04 00:00 UT   10 11 55.0   -07 47 21     1.647    2.557  151.5   10.6   328   11.5 
2025-02-05 00:00 UT   10 11 07.8   -07 46 36     1.641    2.556  152.3   10.3   329   11.4 
2025-02-06 00:00 UT   10 10 19.6   -07 45 36     1.636    2.555  153.2   10.0   331   11.4 
2025-02-07 00:00 UT   10 09 30.6   -07 44 21     1.631    2.554  154.1    9.7   333   11.4 
2025-02-08 00:00 UT   10 08 40.9   -07 42 51     1.626    2.553  154.9    9.4   335   11.4 
2025-02-09 00:00 UT   10 07 50.4   -07 41 06     1.621    2.553  155.7    9.2   337   11.4 
2025-02-10 00:00 UT   10 06 59.3   -07 39 06     1.617    2.552  156.4    8.9   340   11.3 
2025-02-11 00:00 UT   10 06 07.6   -07 36 52     1.613    2.551  157.2    8.6   342   11.3 
2025-02-12 00:00 UT   10 05 15.4   -07 34 23     1.609    2.550  157.9    8.4   345   11.3 
2025-02-13 00:00 UT   10 04 22.7   -07 31 40     1.605    2.550  158.5    8.2   348   11.3 
2025-02-14 00:00 UT   10 03 29.6   -07 28 43     1.602    2.549  159.1    7.9   351   11.3 
2025-02-15 00:00 UT   10 02 36.1   -07 25 31     1.599    2.548  159.7    7.7   354   11.3 
2025-02-16 00:00 UT   10 01 42.4   -07 22 06     1.596    2.547  160.2    7.6   357   11.3 
2025-02-17 00:00 UT   10 00 48.4   -07 18 27     1.593    2.546  160.6    7.4     1   11.2 
2025-02-18 00:00 UT   09 59 54.3   -07 14 35     1.591    2.546  161.0    7.3     4   11.2 
2025-02-19 00:00 UT   09 59 00.0   -07 10 30     1.589    2.545  161.3    7.2     8   11.2 
2025-02-20 00:00 UT   09 58 05.8   -07 06 12     1.587    2.544  161.5    7.1    12   11.2 
2025-02-21 00:00 UT   09 57 11.6   -07 01 41     1.586    2.543  161.6    7.0    16   11.2 

    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.