(82) Alkmene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Nov 2025	12.1	2.279 AU	1.598 AU	07h36m	+25°16'	121.7°	21.7°
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
2025-11-16 00:00 UT   07 36 30.0   +25 16 54     1.598    2.279  121.7   21.7   277   12.1 
2025-11-16 13:03 UT   07 36 44.1   +25 17 29     1.592    2.278  122.2   21.5   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 
2025-11-21 00:00 UT   07 38 18.2   +25 23 03     1.541    2.271  126.3   20.5   277   12.0 
2025-11-22 00:00 UT   07 38 34.1   +25 24 30     1.530    2.269  127.3   20.3   277   12.0 
2025-11-23 00:00 UT   07 38 47.9   +25 26 03     1.519    2.267  128.3   20.0   277   11.9 
2025-11-24 00:00 UT   07 38 59.8   +25 27 40     1.508    2.266  129.2   19.7   276   11.9 
2025-11-25 00:00 UT   07 39 09.7   +25 29 21     1.498    2.264  130.2   19.5   276   11.9 
2025-11-26 00:00 UT   07 39 17.5   +25 31 07     1.487    2.263  131.2   19.2   276   11.9 
2025-11-27 00:00 UT   07 39 23.3   +25 32 58     1.477    2.261  132.2   18.9   276   11.8 
2025-11-28 00:00 UT   07 39 27.1   +25 34 53     1.467    2.259  133.2   18.6   276   11.8 
2025-11-29 00:00 UT   07 39 28.8   +25 36 53     1.457    2.258  134.2   18.3   276   11.8 
2025-11-30 00:00 UT   07 39 28.5   +25 38 57     1.447    2.256  135.2   17.9   275   11.8 
2025-12-01 00:00 UT   07 39 26.1   +25 41 06     1.437    2.255  136.2   17.6   275   11.7 
2025-12-02 00:00 UT   07 39 21.6   +25 43 19     1.428    2.253  137.2   17.3   275   11.7 
2025-12-03 00:00 UT   07 39 15.0   +25 45 36     1.418    2.252  138.3   16.9   275   11.7 
2025-12-04 00:00 UT   07 39 06.4   +25 47 57     1.409    2.250  139.3   16.6   275   11.7 
2025-12-05 00:00 UT   07 38 55.7   +25 50 22     1.400    2.249  140.4   16.2   274   11.6 
2025-12-06 00:00 UT   07 38 42.9   +25 52 50     1.391    2.247  141.4   15.9   274   11.6 
2025-12-07 00:00 UT   07 38 28.0   +25 55 23     1.383    2.246  142.5   15.5   274   11.6 
2025-12-08 00:00 UT   07 38 11.1   +25 57 59     1.374    2.244  143.6   15.1   274   11.5 
2025-12-09 00:00 UT   07 37 52.0   +26 00 38     1.366    2.243  144.6   14.7   273   11.5 
2025-12-10 00:00 UT   07 37 30.9   +26 03 20     1.358    2.241  145.7   14.3   273   11.5 
2025-12-11 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 

    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.