(233) Asterope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	13 Apr 2026	12.2	2.869 AU	1.867 AU	13h21m	-12°40'	176.2°	1.3°
Today	4 Jun 2026	13.2	2.833 AU	2.149 AU	12h56m	-07°41'	123.0°	17.5°

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 Asterope are:

            e (Eccentricity)                : 0.1016407
            a (Semimajor axis)              : 2.6587895
            i (Inclination)                 : 7.69073
            Ω (Longitude of ascending node) : 221.91100
            ω (Argument of perihelion)      : 125.93254
            M (Mean anomaly)                : 190.09847
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 168.08988
            B (Latitude of perihelion)      : 6.22078
            P (Orbital period in years)     : 4.34            
        

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-06-04 00:00 UT   12 56 59.0   -07 41 49     2.149    2.833  123.0   17.5   112   13.2 
2026-06-04 05:50 UT   12 56 59.6   -07 41 12     2.152    2.832  122.8   17.5   112   13.3 
2026-06-05 00:00 UT   12 57 02.0   -07 39 22     2.160    2.832  122.1   17.7   112   13.3 
2026-06-06 00:00 UT   12 57 06.3   -07 37 06     2.170    2.831  121.1   17.9   112   13.3 
2026-06-07 00:00 UT   12 57 12.0   -07 34 59     2.181    2.830  120.2   18.1   112   13.3 
2026-06-08 00:00 UT   12 57 19.0   -07 33 01     2.192    2.829  119.2   18.2   112   13.3 
2026-06-09 00:00 UT   12 57 27.3   -07 31 13     2.203    2.829  118.3   18.4   112   13.3 
2026-06-10 00:00 UT   12 57 36.9   -07 29 34     2.214    2.828  117.4   18.6   112   13.3 
2026-06-11 00:00 UT   12 57 47.9   -07 28 05     2.225    2.827  116.4   18.8   112   13.4 
2026-06-12 00:00 UT   12 58 00.1   -07 26 45     2.236    2.826  115.5   18.9   112   13.4 
2026-06-13 00:00 UT   12 58 13.6   -07 25 34     2.248    2.826  114.6   19.1   112   13.4 
2026-06-14 00:00 UT   12 58 28.4   -07 24 33     2.259    2.825  113.7   19.2   112   13.4 
2026-06-15 00:00 UT   12 58 44.5   -07 23 41     2.271    2.824  112.8   19.4   112   13.4 
2026-06-16 00:00 UT   12 59 01.9   -07 22 58     2.282    2.823  111.9   19.5   112   13.4 
2026-06-17 00:00 UT   12 59 20.5   -07 22 24     2.294    2.822  111.0   19.6   112   13.5 
2026-06-18 00:00 UT   12 59 40.3   -07 21 60     2.306    2.822  110.1   19.8   112   13.5 
2026-06-19 00:00 UT   13 00 01.4   -07 21 44     2.317    2.821  109.3   19.9   112   13.5 
2026-06-20 00:00 UT   13 00 23.6   -07 21 37     2.329    2.820  108.4   20.0   112   13.5 
2026-06-21 00:00 UT   13 00 47.1   -07 21 38     2.341    2.819  107.5   20.1   112   13.5 
2026-06-22 00:00 UT   13 01 11.8   -07 21 49     2.353    2.818  106.7   20.2   112   13.5 
2026-06-23 00:00 UT   13 01 37.6   -07 22 07     2.365    2.817  105.8   20.3   112   13.5 
2026-06-24 00:00 UT   13 02 04.6   -07 22 35     2.378    2.817  105.0   20.4   112   13.6 
2026-06-25 00:00 UT   13 02 32.7   -07 23 10     2.390    2.816  104.1   20.5   112   13.6 
2026-06-26 00:00 UT   13 03 02.0   -07 23 53     2.402    2.815  103.3   20.6   112   13.6 
2026-06-27 00:00 UT   13 03 32.4   -07 24 45     2.414    2.814  102.5   20.7   112   13.6 
2026-06-28 00:00 UT   13 04 03.8   -07 25 44     2.426    2.813  101.6   20.7   112   13.6 
2026-06-29 00:00 UT   13 04 36.4   -07 26 52     2.439    2.813  100.8   20.8   112   13.6 
2026-06-30 00:00 UT   13 05 10.0   -07 28 07     2.451    2.812  100.0   20.9   112   13.6 
2026-07-01 00:00 UT   13 05 44.7   -07 29 29     2.463    2.811   99.2   20.9   112   13.6 
2026-07-02 00:00 UT   13 06 20.4   -07 30 59     2.476    2.810   98.4   21.0   112   13.7 
2026-07-03 00:00 UT   13 06 57.2   -07 32 37     2.488    2.809   97.6   21.0   112   13.7 
2026-07-04 00:00 UT   13 07 34.9   -07 34 21     2.501    2.808   96.8   21.1   112   13.7 

    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.