(409) Aspasia
ephemeris date magn radius delta ra dec elong phase
Today5 Jul 202512.82.447 AU2.731 AU10h55m-02°00'63.2°21.8°
Opposition9 Jul 202610.92.446 AU1.447 AU19h09m-08°39'166.3°5.7°
(409) Aspasia - 2025-07-05
astro.vanbuitenen.nl


 
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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)                : 0.0731923
            a (Semimajor axis)              : 2.5747933
            i (Inclination)                 : 11.28539
            Ω (Longitude of ascending node) : 242.05210
            ω (Argument of perihelion)      : 355.76509
            M (Mean anomaly)                : 301.17999
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 237.89878
            B (Latitude of perihelion)      : -0.82803
            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
2025-07-05 00:00 UT   10 55 02.6   -02 00 15     2.731    2.447   63.2   21.8   117   12.8 
2025-07-05 19:35 UT   10 56 15.2   -02 04 40     2.739    2.447   62.8   21.7   117   12.8 
2025-07-06 00:00 UT   10 56 31.6   -02 05 41     2.741    2.447   62.7   21.7   117   12.8 
2025-07-07 00:00 UT   10 58 01.1   -02 11 12     2.751    2.446   62.1   21.5   117   12.8 
2025-07-08 00:00 UT   10 59 30.9   -02 16 48     2.761    2.445   61.5   21.4   117   12.9 
2025-07-09 00:00 UT   11 01 01.1   -02 22 29     2.771    2.445   61.0   21.3   117   12.9 
2025-07-10 00:00 UT   11 02 31.8   -02 28 16     2.781    2.444   60.4   21.2   117   12.9 
2025-07-11 00:00 UT   11 04 02.7   -02 34 07     2.791    2.444   59.8   21.1   118   12.9 
2025-07-12 00:00 UT   11 05 34.1   -02 40 03     2.801    2.443   59.3   21.0   118   12.9 
2025-07-13 00:00 UT   11 07 05.8   -02 46 05     2.810    2.442   58.7   20.8   118   12.9 
2025-07-14 00:00 UT   11 08 37.9   -02 52 10     2.820    2.442   58.2   20.7   118   12.9 
2025-07-15 00:00 UT   11 10 10.3   -02 58 21     2.830    2.441   57.6   20.6   118   12.9 
2025-07-16 00:00 UT   11 11 43.1   -03 04 36     2.839    2.441   57.1   20.5   118   12.9 
2025-07-17 00:00 UT   11 13 16.3   -03 10 56     2.849    2.440   56.5   20.3   118   12.9 
2025-07-18 00:00 UT   11 14 49.7   -03 17 20     2.858    2.439   56.0   20.2   118   12.9 
2025-07-19 00:00 UT   11 16 23.6   -03 23 49     2.868    2.439   55.4   20.1   118   12.9 
2025-07-20 00:00 UT   11 17 57.7   -03 30 22     2.877    2.438   54.9   19.9   118   12.9 
2025-07-21 00:00 UT   11 19 32.2   -03 36 59     2.886    2.438   54.3   19.8   119   12.9 
2025-07-22 00:00 UT   11 21 07.0   -03 43 41     2.896    2.437   53.8   19.7   119   12.9 
2025-07-23 00:00 UT   11 22 42.2   -03 50 27     2.905    2.437   53.2   19.5   119   12.9 
2025-07-24 00:00 UT   11 24 17.6   -03 57 17     2.914    2.436   52.7   19.4   119   12.9 
2025-07-25 00:00 UT   11 25 53.4   -04 04 11     2.923    2.435   52.2   19.2   119   12.9 
2025-07-26 00:00 UT   11 27 29.5   -04 11 09     2.932    2.435   51.6   19.1   119   12.9 


    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.