(82) Alkmene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Jul 2025	13.7	2.541 AU	3.228 AU	04h33m	+23°03'	40.4°	15.0°
Opposition	6 Jan 2026	10.7	2.205 AU	1.224 AU	07h16m	+27°20'	174.8°	2.3°

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 Alkmene are:

            e (Eccentricity)                : 0.2209750
            a (Semimajor axis)              : 2.7624821
            i (Inclination)                 : 2.82605
            Ω (Longitude of ascending node) : 25.42646
            ω (Argument of perihelion)      : 110.83411
            M (Mean anomaly)                : 288.26372
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : -43.71624
            B (Latitude of perihelion)      : 2.64113
            P (Orbital period in years)     : 4.59            
        

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   04 33 18.2   +23 03 27     3.228    2.541   40.4   15.0   263   13.7 
2025-07-13 09:51 UT   04 34 03.2   +23 05 15     3.224    2.540   40.6   15.1   263   13.7 
2025-07-14 00:00 UT   04 35 07.9   +23 07 50     3.218    2.539   40.9   15.2   263   13.7 
2025-07-15 00:00 UT   04 36 57.7   +23 12 08     3.207    2.536   41.5   15.4   263   13.7 
2025-07-16 00:00 UT   04 38 47.5   +23 16 21     3.197    2.534   42.0   15.6   263   13.7 
2025-07-17 00:00 UT   04 40 37.3   +23 20 30     3.186    2.532   42.5   15.7   263   13.7 
2025-07-18 00:00 UT   04 42 27.1   +23 24 35     3.175    2.529   43.0   15.9   264   13.6 
2025-07-19 00:00 UT   04 44 17.0   +23 28 35     3.164    2.527   43.6   16.1   264   13.6 
2025-07-20 00:00 UT   04 46 06.8   +23 32 31     3.153    2.525   44.1   16.3   264   13.6 
2025-07-21 00:00 UT   04 47 56.7   +23 36 22     3.142    2.522   44.6   16.4   264   13.6 
2025-07-22 00:00 UT   04 49 46.5   +23 40 09     3.131    2.520   45.2   16.6   264   13.6 
2025-07-23 00:00 UT   04 51 36.3   +23 43 52     3.120    2.518   45.7   16.8   264   13.6 
2025-07-24 00:00 UT   04 53 26.0   +23 47 30     3.109    2.516   46.2   17.0   265   13.6 
2025-07-25 00:00 UT   04 55 15.7   +23 51 03     3.098    2.513   46.8   17.1   265   13.6 
2025-07-26 00:00 UT   04 57 05.4   +23 54 32     3.086    2.511   47.3   17.3   265   13.6 
2025-07-27 00:00 UT   04 58 55.0   +23 57 56     3.075    2.509   47.8   17.5   265   13.6 
2025-07-28 00:00 UT   05 00 44.6   +24 01 16     3.063    2.506   48.4   17.6   265   13.6 
2025-07-29 00:00 UT   05 02 34.1   +24 04 31     3.052    2.504   48.9   17.8   265   13.6 
2025-07-30 00:00 UT   05 04 23.5   +24 07 42     3.040    2.502   49.4   18.0   266   13.6 
2025-07-31 00:00 UT   05 06 12.8   +24 10 48     3.028    2.500   50.0   18.1   266   13.6 
2025-08-01 00:00 UT   05 08 02.0   +24 13 50     3.017    2.497   50.5   18.3   266   13.6 
2025-08-02 00:00 UT   05 09 51.2   +24 16 48     3.005    2.495   51.1   18.4   266   13.6 

    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.