(11) Parthenope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Jan 2025	11.4	2.504 AU	2.064 AU	03h02m	+12°21'	104.9°	22.3°
Opposition	25 Feb 2026	10.2	2.686 AU	1.698 AU	10h42m	+12°22'	176.1°	1.4°

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 Parthenope are:

            e (Eccentricity)                : 0.0994330
            a (Semimajor axis)              : 2.4533692
            i (Inclination)                 : 4.63153
            Ω (Longitude of ascending node) : 125.50589
            ω (Argument of perihelion)      : 196.07085
            M (Mean anomaly)                : 71.50262
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 141.52696
            B (Latitude of perihelion)      : -1.28084
            P (Orbital period in years)     : 3.84            
        

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
2025-01-22 00:00 UT   03 02 38.7   +12 21 12     2.064    2.504  104.9   22.3    73   11.4 
2025-01-22 05:07 UT   03 02 46.1   +12 22 18     2.067    2.504  104.7   22.3    73   11.4 
2025-01-23 00:00 UT   03 03 13.9   +12 26 20     2.078    2.505  104.0   22.4    73   11.4 
2025-01-24 00:00 UT   03 03 50.4   +12 31 32     2.091    2.506  103.2   22.5    73   11.4 
2025-01-25 00:00 UT   03 04 28.2   +12 36 48     2.105    2.507  102.3   22.6    73   11.4 
2025-01-26 00:00 UT   03 05 07.4   +12 42 07     2.119    2.508  101.5   22.6    73   11.4 
2025-01-27 00:00 UT   03 05 47.9   +12 47 29     2.133    2.509  100.6   22.7    73   11.5 
2025-01-28 00:00 UT   03 06 29.6   +12 52 55     2.147    2.510   99.8   22.7    73   11.5 
2025-01-29 00:00 UT   03 07 12.6   +12 58 24     2.161    2.511   99.0   22.8    73   11.5 
2025-01-30 00:00 UT   03 07 56.9   +13 03 56     2.175    2.512   98.2   22.8    74   11.5 
2025-01-31 00:00 UT   03 08 42.4   +13 09 31     2.189    2.513   97.4   22.9    74   11.5 
2025-02-01 00:00 UT   03 09 29.1   +13 15 09     2.203    2.514   96.6   22.9    74   11.5 
2025-02-02 00:00 UT   03 10 17.0   +13 20 49     2.217    2.515   95.8   22.9    74   11.6 
2025-02-03 00:00 UT   03 11 06.0   +13 26 31     2.231    2.516   95.0   23.0    74   11.6 
2025-02-04 00:00 UT   03 11 56.3   +13 32 16     2.245    2.517   94.2   23.0    74   11.6 
2025-02-05 00:00 UT   03 12 47.6   +13 38 03     2.260    2.518   93.4   23.0    74   11.6 
2025-02-06 00:00 UT   03 13 40.1   +13 43 52     2.274    2.519   92.6   23.0    74   11.6 
2025-02-07 00:00 UT   03 14 33.7   +13 49 43     2.288    2.520   91.9   23.0    75   11.6 
2025-02-08 00:00 UT   03 15 28.4   +13 55 36     2.302    2.521   91.1   23.0    75   11.6 
2025-02-09 00:00 UT   03 16 24.1   +14 01 30     2.316    2.522   90.3   23.0    75   11.7 
2025-02-10 00:00 UT   03 17 20.8   +14 07 25     2.330    2.524   89.6   23.0    75   11.7 
2025-02-11 00:00 UT   03 18 18.6   +14 13 22     2.344    2.525   88.8   23.0    75   11.7 
2025-02-12 00:00 UT   03 19 17.4   +14 19 21     2.359    2.526   88.0   23.0    75   11.7 
2025-02-13 00:00 UT   03 20 17.2   +14 25 20     2.373    2.527   87.3   23.0    75   11.7 
2025-02-14 00:00 UT   03 21 18.0   +14 31 20     2.387    2.528   86.5   23.0    75   11.7 
2025-02-15 00:00 UT   03 22 19.7   +14 37 21     2.401    2.529   85.8   22.9    76   11.7 
2025-02-16 00:00 UT   03 23 22.3   +14 43 23     2.415    2.530   85.1   22.9    76   11.8 
2025-02-17 00:00 UT   03 24 26.0   +14 49 25     2.429    2.531   84.3   22.9    76   11.8 
2025-02-18 00:00 UT   03 25 30.5   +14 55 29     2.443    2.532   83.6   22.8    76   11.8 
2025-02-19 00:00 UT   03 26 35.9   +15 01 32     2.458    2.533   82.9   22.8    76   11.8 
2025-02-20 00:00 UT   03 27 42.2   +15 07 36     2.472    2.534   82.2   22.7    76   11.8 
2025-02-21 00:00 UT   03 28 49.5   +15 13 40     2.486    2.535   81.4   22.7    76   11.8 

    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.