(82) Alkmene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Oct 2025	12.7	2.326 AU	1.931 AU	07h15m	+25°09'	100.3°	24.9°
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)                : 0.2211034
            a (Semimajor axis)              : 2.7639715
            i (Inclination)                 : 2.82513
            Ω (Longitude of ascending node) : 25.40944
            ω (Argument of perihelion)      : 110.71943
            M (Mean anomaly)                : 331.29883
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -43.84806
            B (Latitude of perihelion)      : 2.64228
            P (Orbital period in years)     : 4.60            
        

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
2025-10-21 00:00 UT   07 15 56.7   +25 09 57     1.931    2.326  100.3   24.9   277   12.7 
2025-10-21 02:46 UT   07 16 04.3   +25 09 55     1.929    2.325  100.4   24.9   277   12.7 
2025-10-22 00:00 UT   07 17 01.8   +25 09 41     1.917    2.324  101.1   24.9   277   12.7 
2025-10-23 00:00 UT   07 18 05.7   +25 09 26     1.904    2.322  101.8   24.8   277   12.6 
2025-10-24 00:00 UT   07 19 08.3   +25 09 13     1.890    2.320  102.6   24.7   277   12.6 
2025-10-25 00:00 UT   07 20 09.6   +25 09 02     1.877    2.318  103.4   24.7   277   12.6 
2025-10-26 00:00 UT   07 21 09.7   +25 08 52     1.863    2.316  104.1   24.6   277   12.6 
2025-10-27 00:00 UT   07 22 08.4   +25 08 45     1.850    2.314  104.9   24.5   277   12.6 
2025-10-28 00:00 UT   07 23 05.8   +25 08 40     1.837    2.313  105.7   24.4   277   12.5 
2025-10-29 00:00 UT   07 24 01.8   +25 08 38     1.824    2.311  106.5   24.3   277   12.5 
2025-10-30 00:00 UT   07 24 56.4   +25 08 38     1.810    2.309  107.3   24.3   277   12.5 
2025-10-31 00:00 UT   07 25 49.7   +25 08 41     1.797    2.307  108.1   24.1   277   12.5 
2025-11-01 00:00 UT   07 26 41.5   +25 08 46     1.784    2.305  108.9   24.0   277   12.5 
2025-11-02 00:00 UT   07 27 31.8   +25 08 54     1.771    2.303  109.7   23.9   277   12.4 
2025-11-03 00:00 UT   07 28 20.7   +25 09 06     1.758    2.302  110.5   23.8   277   12.4 
2025-11-04 00:00 UT   07 29 08.1   +25 09 20     1.746    2.300  111.3   23.7   277   12.4 
2025-11-05 00:00 UT   07 29 53.9   +25 09 37     1.733    2.298  112.2   23.6   277   12.4 
2025-11-06 00:00 UT   07 30 38.2   +25 09 58     1.720    2.296  113.0   23.4   277   12.3 
2025-11-07 00:00 UT   07 31 21.0   +25 10 22     1.707    2.295  113.8   23.3   277   12.3 
2025-11-08 00:00 UT   07 32 02.1   +25 10 50     1.695    2.293  114.7   23.1   277   12.3 
2025-11-09 00:00 UT   07 32 41.6   +25 11 22     1.683    2.291  115.5   23.0   277   12.3 
2025-11-10 00:00 UT   07 33 19.5   +25 11 57     1.670    2.289  116.4   22.8   277   12.3 
2025-11-11 00:00 UT   07 33 55.6   +25 12 36     1.658    2.288  117.3   22.6   277   12.2 
2025-11-12 00:00 UT   07 34 30.0   +25 13 20     1.646    2.286  118.1   22.5   277   12.2 
2025-11-13 00:00 UT   07 35 02.7   +25 14 07     1.634    2.284  119.0   22.3   277   12.2 
2025-11-14 00:00 UT   07 35 33.6   +25 14 58     1.622    2.282  119.9   22.1   277   12.2 
2025-11-15 00:00 UT   07 36 02.7   +25 15 54     1.610    2.281  120.8   21.9   277   12.1 
2025-11-16 00:00 UT   07 36 30.0   +25 16 54     1.598    2.279  121.7   21.7   277   12.1 
2025-11-17 00:00 UT   07 36 55.5   +25 17 59     1.586    2.277  122.6   21.5   277   12.1 
2025-11-18 00:00 UT   07 37 19.0   +25 19 08     1.575    2.276  123.5   21.2   277   12.1 
2025-11-19 00:00 UT   07 37 40.7   +25 20 22     1.564    2.274  124.5   21.0   277   12.0 
2025-11-20 00:00 UT   07 38 00.4   +25 21 40     1.552    2.272  125.4   20.8   277   12.0 

    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.