(179) Klytaemnestra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	18 Sep 2025	11.9	2.648 AU	1.657 AU	23h25m	+09°34'	167.8°	4.6°
Today	21 Oct 2025	12.4	2.650 AU	1.796 AU	23h08m	+06°07'	141.7°	13.5°

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 Klytaemnestra are:

            e (Eccentricity)                : 0.1092656
            a (Semimajor axis)              : 2.9727345
            i (Inclination)                 : 7.81742
            Ω (Longitude of ascending node) : 251.82174
            ω (Argument of perihelion)      : 104.49490
            M (Mean anomaly)                : 11.69658
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 176.44681
            B (Latitude of perihelion)      : 7.56711
            P (Orbital period in years)     : 5.13            
        

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   23 08 12.0   +06 07 33     1.796    2.650  141.7   13.5    81   12.4 
2025-10-21 00:05 UT   23 08 11.9   +06 07 32     1.796    2.650  141.7   13.5    81   12.4 
2025-10-22 00:00 UT   23 07 59.4   +06 01 51     1.804    2.650  140.7   13.8    80   12.4 
2025-10-23 00:00 UT   23 07 48.3   +05 56 16     1.812    2.650  139.7   14.1    80   12.5 
2025-10-24 00:00 UT   23 07 38.7   +05 50 48     1.821    2.650  138.7   14.4    79   12.5 
2025-10-25 00:00 UT   23 07 30.5   +05 45 27     1.830    2.651  137.6   14.6    79   12.5 
2025-10-26 00:00 UT   23 07 23.9   +05 40 13     1.838    2.651  136.6   14.9    78   12.5 
2025-10-27 00:00 UT   23 07 18.8   +05 35 07     1.848    2.651  135.6   15.2    78   12.6 
2025-10-28 00:00 UT   23 07 15.1   +05 30 09     1.857    2.651  134.6   15.5    77   12.6 
2025-10-29 00:00 UT   23 07 13.0   +05 25 19     1.866    2.651  133.6   15.7    77   12.6 
2025-10-30 00:00 UT   23 07 12.4   +05 20 37     1.876    2.651  132.7   16.0    76   12.6 
2025-10-31 00:00 UT   23 07 13.3   +05 16 04     1.886    2.652  131.7   16.2    76   12.6 
2025-11-01 00:00 UT   23 07 15.6   +05 11 39     1.896    2.652  130.7   16.5    76   12.7 
2025-11-02 00:00 UT   23 07 19.5   +05 07 22     1.906    2.652  129.7   16.7    75   12.7 
2025-11-03 00:00 UT   23 07 24.8   +05 03 15     1.916    2.652  128.7   17.0    75   12.7 
2025-11-04 00:00 UT   23 07 31.6   +04 59 16     1.926    2.652  127.8   17.2    75   12.7 
2025-11-05 00:00 UT   23 07 39.9   +04 55 26     1.937    2.653  126.8   17.4    74   12.7 
2025-11-06 00:00 UT   23 07 49.7   +04 51 46     1.947    2.653  125.9   17.6    74   12.7 
2025-11-07 00:00 UT   23 08 00.8   +04 48 14     1.958    2.653  124.9   17.8    74   12.8 
2025-11-08 00:00 UT   23 08 13.5   +04 44 51     1.969    2.653  124.0   18.0    73   12.8 
2025-11-09 00:00 UT   23 08 27.5   +04 41 38     1.980    2.653  123.0   18.2    73   12.8 
2025-11-10 00:00 UT   23 08 43.0   +04 38 34     1.992    2.654  122.1   18.4    73   12.8 
2025-11-11 00:00 UT   23 08 59.9   +04 35 40     2.003    2.654  121.1   18.6    73   12.8 
2025-11-12 00:00 UT   23 09 18.1   +04 32 55     2.014    2.654  120.2   18.8    72   12.9 
2025-11-13 00:00 UT   23 09 37.8   +04 30 19     2.026    2.654  119.3   19.0    72   12.9 
2025-11-14 00:00 UT   23 09 58.9   +04 27 53     2.038    2.655  118.4   19.1    72   12.9 
2025-11-15 00:00 UT   23 10 21.3   +04 25 36     2.049    2.655  117.4   19.3    72   12.9 
2025-11-16 00:00 UT   23 10 45.0   +04 23 29     2.061    2.655  116.5   19.5    71   12.9 
2025-11-17 00:00 UT   23 11 10.1   +04 21 32     2.073    2.655  115.6   19.6    71   13.0 
2025-11-18 00:00 UT   23 11 36.6   +04 19 44     2.086    2.656  114.7   19.8    71   13.0 
2025-11-19 00:00 UT   23 12 04.3   +04 18 06     2.098    2.656  113.8   19.9    71   13.0 
2025-11-20 00:00 UT   23 12 33.4   +04 16 37     2.110    2.656  112.9   20.0    71   13.0 

    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.