(82) Alkmene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Dec 2025	11.5	2.241 AU	1.358 AU	07h37m	+26°03'	145.7°	14.3°
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) : 25.40943
            ω (Argument of perihelion)      : 110.71943
            M (Mean anomaly)                : 331.29883
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -43.84807
            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
2025-12-10 00:00 UT   07 37 30.9   +26 03 20     1.358    2.241  145.7   14.3   273   11.5 
2025-12-10 18:21 UT   07 37 13.4   +26 05 26     1.352    2.240  146.6   14.0   273   11.5 
2025-12-11 00:00 UT   07 37 07.8   +26 06 06     1.350    2.240  146.8   13.9   273   11.5 
2025-12-12 00:00 UT   07 36 42.6   +26 08 54     1.342    2.238  147.9   13.5   272   11.4 
2025-12-13 00:00 UT   07 36 15.3   +26 11 44     1.335    2.237  149.0   13.1   272   11.4 
2025-12-14 00:00 UT   07 35 46.1   +26 14 37     1.327    2.235  150.1   12.7   271   11.4 
2025-12-15 00:00 UT   07 35 14.9   +26 17 32     1.320    2.234  151.3   12.2   271   11.3 
2025-12-16 00:00 UT   07 34 41.8   +26 20 29     1.313    2.233  152.4   11.8   270   11.3 
2025-12-17 00:00 UT   07 34 06.7   +26 23 27     1.307    2.231  153.5   11.3   270   11.3 
2025-12-18 00:00 UT   07 33 29.8   +26 26 27     1.300    2.230  154.7   10.9   269   11.3 
2025-12-19 00:00 UT   07 32 51.0   +26 29 27     1.294    2.228  155.8   10.4   268   11.2 
2025-12-20 00:00 UT   07 32 10.5   +26 32 28     1.288    2.227  156.9   10.0   268   11.2 
2025-12-21 00:00 UT   07 31 28.3   +26 35 29     1.282    2.226  158.1    9.5   267   11.2 
2025-12-22 00:00 UT   07 30 44.3   +26 38 30     1.277    2.224  159.2    9.0   266   11.1 
2025-12-23 00:00 UT   07 29 58.8   +26 41 30     1.272    2.223  160.4    8.5   265   11.1 
2025-12-24 00:00 UT   07 29 11.8   +26 44 30     1.267    2.222  161.6    8.1   264   11.1 
2025-12-25 00:00 UT   07 28 23.3   +26 47 28     1.262    2.220  162.7    7.6   263   11.0 
2025-12-26 00:00 UT   07 27 33.3   +26 50 26     1.257    2.219  163.9    7.1   261   11.0 
2025-12-27 00:00 UT   07 26 42.1   +26 53 21     1.253    2.218  165.0    6.6   260   11.0 
2025-12-28 00:00 UT   07 25 49.6   +26 56 14     1.249    2.217  166.1    6.1   258   10.9 
2025-12-29 00:00 UT   07 24 56.0   +26 59 04     1.245    2.215  167.3    5.6   256   10.9 
2025-12-30 00:00 UT   07 24 01.2   +27 01 52     1.242    2.214  168.4    5.1   253   10.9 
2025-12-31 00:00 UT   07 23 05.5   +27 04 36     1.239    2.213  169.5    4.7   250   10.9 
2026-01-01 00:00 UT   07 22 08.9   +27 07 17     1.236    2.212  170.5    4.2   247   10.8 
2026-01-02 00:00 UT   07 21 11.5   +27 09 55     1.233    2.210  171.6    3.7   242   10.8 
2026-01-03 00:00 UT   07 20 13.3   +27 12 28     1.231    2.209  172.5    3.3   236   10.8 
2026-01-04 00:00 UT   07 19 14.5   +27 14 56     1.228    2.208  173.4    2.9   229   10.7 
2026-01-05 00:00 UT   07 18 15.1   +27 17 21     1.226    2.207  174.1    2.6   219   10.7 
2026-01-06 00:00 UT   07 17 15.3   +27 19 40     1.225    2.206  174.6    2.4   208   10.7 
2026-01-07 00:00 UT   07 16 15.1   +27 21 54     1.223    2.204  174.9    2.3   194   10.7 
2026-01-08 00:00 UT   07 15 14.6   +27 24 03     1.222    2.203  174.9    2.3   180   10.7 
2026-01-09 00:00 UT   07 14 14.0   +27 26 06     1.221    2.202  174.6    2.4   167   10.7 

    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.