(179) Klytaemnestra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Sep 2025	11.9	2.648 AU	1.658 AU	23h27m	+09°48'	167.3°	4.8°
Opposition	18 Sep 2025	11.9	2.648 AU	1.657 AU	23h25m	+09°34'	167.8°	4.6°

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)                : 0.1094492
            a (Semimajor axis)              : 2.9733665
            i (Inclination)                 : 7.81734
            Ω (Longitude of ascending node) : 251.82504
            ω (Argument of perihelion)      : 104.46650
            M (Mean anomaly)                : 333.26643
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 176.42147
            B (Latitude of perihelion)      : 7.56801
            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. 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
2025-09-16 00:00 UT   23 27 40.6   +09 48 48     1.658    2.648  167.3    4.8   172   11.9 
2025-09-16 18:49 UT   23 27 05.3   +09 44 30     1.658    2.648  167.5    4.7   168   11.9 
2025-09-17 00:00 UT   23 26 55.5   +09 43 18     1.657    2.648  167.6    4.7   167   11.9 
2025-09-18 00:00 UT   23 26 10.5   +09 37 40     1.657    2.648  167.8    4.6   162   11.9 
2025-09-19 00:00 UT   23 25 25.6   +09 31 55     1.657    2.648  167.8    4.6   156   11.9 
2025-09-20 00:00 UT   23 24 41.0   +09 26 02     1.658    2.648  167.8    4.6   150   11.9 
2025-09-21 00:00 UT   23 23 56.7   +09 20 03     1.658    2.648  167.6    4.7   145   11.9 
2025-09-22 00:00 UT   23 23 12.7   +09 13 58     1.659    2.648  167.4    4.8   139   11.9 
2025-09-23 00:00 UT   23 22 29.2   +09 07 48     1.660    2.648  167.0    4.9   134   11.9 
2025-09-24 00:00 UT   23 21 46.1   +09 01 32     1.662    2.648  166.5    5.1   130   11.9 
2025-09-25 00:00 UT   23 21 03.5   +08 55 12     1.664    2.648  166.0    5.3   125   11.9 
2025-09-26 00:00 UT   23 20 21.6   +08 48 47     1.666    2.648  165.4    5.5   121   11.9 
2025-09-27 00:00 UT   23 19 40.2   +08 42 18     1.668    2.648  164.7    5.7   117   11.9 
2025-09-28 00:00 UT   23 18 59.6   +08 35 47     1.670    2.648  164.0    6.0   114   12.0 
2025-09-29 00:00 UT   23 18 19.7   +08 29 12     1.673    2.648  163.2    6.3   111   12.0 
2025-09-30 00:00 UT   23 17 40.7   +08 22 35     1.676    2.648  162.4    6.6   108   12.0 
2025-10-01 00:00 UT   23 17 02.4   +08 15 57     1.679    2.648  161.5    6.9   105   12.0 
2025-10-02 00:00 UT   23 16 25.1   +08 09 17     1.683    2.648  160.6    7.2   103   12.0 
2025-10-03 00:00 UT   23 15 48.7   +08 02 36     1.687    2.648  159.7    7.5   101   12.1 
2025-10-04 00:00 UT   23 15 13.2   +07 55 55     1.691    2.648  158.8    7.9    99   12.1 
2025-10-05 00:00 UT   23 14 38.8   +07 49 13     1.695    2.648  157.8    8.2    97   12.1 
2025-10-06 00:00 UT   23 14 05.4   +07 42 32     1.700    2.648  156.9    8.5    95   12.1 
2025-10-07 00:00 UT   23 13 33.2   +07 35 52     1.704    2.649  155.9    8.9    94   12.1 
2025-10-08 00:00 UT   23 13 02.0   +07 29 13     1.710    2.649  154.9    9.2    92   12.2 
2025-10-09 00:00 UT   23 12 32.0   +07 22 36     1.715    2.649  153.9    9.5    91   12.2 
2025-10-10 00:00 UT   23 12 03.2   +07 16 00     1.720    2.649  152.9    9.9    90   12.2 
2025-10-11 00:00 UT   23 11 35.6   +07 09 28     1.726    2.649  151.9   10.2    89   12.2 
2025-10-12 00:00 UT   23 11 09.3   +07 02 58     1.732    2.649  150.9   10.6    88   12.2 
2025-10-13 00:00 UT   23 10 44.2   +06 56 31     1.738    2.649  149.9   10.9    87   12.3 
2025-10-14 00:00 UT   23 10 20.4   +06 50 08     1.745    2.649  148.9   11.2    86   12.3 
2025-10-15 00:00 UT   23 09 58.0   +06 43 48     1.751    2.649  147.8   11.6    85   12.3 
2025-10-16 00:00 UT   23 09 36.9   +06 37 33     1.758    2.649  146.8   11.9    84   12.3 

    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.