(11) Parthenope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	7 Nov 2025	12.2	2.697 AU	2.860 AU	10h24m	+10°38'	70.5°	20.3°
Opposition	25 Feb 2026	10.2	2.689 AU	1.701 AU	10h41m	+12°25'	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)                : 0.1004774
            a (Semimajor axis)              : 2.4531673
            i (Inclination)                 : 4.63575
            Ω (Longitude of ascending node) : 125.46698
            ω (Argument of perihelion)      : 196.42014
            M (Mean anomaly)                : 173.65693
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 141.83628
            B (Latitude of perihelion)      : -1.30911
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-11-07 00:00 UT   10 24 21.2   +10 38 25     2.860    2.697   70.5   20.3   292   12.2 
2025-11-07 04:13 UT   10 24 33.3   +10 37 28     2.858    2.697   70.6   20.3   292   12.2 
2025-11-08 00:00 UT   10 25 30.0   +10 33 02     2.847    2.697   71.2   20.4   292   12.2 
2025-11-09 00:00 UT   10 26 38.2   +10 27 41     2.834    2.697   71.9   20.4   292   12.2 
2025-11-10 00:00 UT   10 27 45.7   +10 22 25     2.821    2.697   72.6   20.5   292   12.2 
2025-11-11 00:00 UT   10 28 52.5   +10 17 12     2.808    2.697   73.4   20.6   292   12.1 
2025-11-12 00:00 UT   10 29 58.6   +10 12 02     2.795    2.697   74.1   20.7   292   12.1 
2025-11-13 00:00 UT   10 31 04.1   +10 06 56     2.782    2.697   74.8   20.7   292   12.1 
2025-11-14 00:00 UT   10 32 08.8   +10 01 55     2.769    2.698   75.5   20.8   292   12.1 
2025-11-15 00:00 UT   10 33 12.8   +09 56 57     2.756    2.698   76.3   20.9   292   12.1 
2025-11-16 00:00 UT   10 34 16.1   +09 52 03     2.742    2.698   77.0   20.9   292   12.1 
2025-11-17 00:00 UT   10 35 18.6   +09 47 14     2.729    2.698   77.7   21.0   292   12.1 
2025-11-18 00:00 UT   10 36 20.4   +09 42 30     2.715    2.698   78.5   21.0   292   12.1 
2025-11-19 00:00 UT   10 37 21.4   +09 37 50     2.702    2.698   79.2   21.1   292   12.1 
2025-11-20 00:00 UT   10 38 21.7   +09 33 14     2.689    2.698   80.0   21.1   292   12.1 
2025-11-21 00:00 UT   10 39 21.1   +09 28 44     2.675    2.698   80.7   21.2   292   12.1 
2025-11-22 00:00 UT   10 40 19.7   +09 24 18     2.661    2.699   81.5   21.2   292   12.0 
2025-11-23 00:00 UT   10 41 17.5   +09 19 58     2.648    2.699   82.3   21.3   292   12.0 
2025-11-24 00:00 UT   10 42 14.5   +09 15 42     2.634    2.699   83.0   21.3   292   12.0 
2025-11-25 00:00 UT   10 43 10.6   +09 11 32     2.621    2.699   83.8   21.3   292   12.0 
2025-11-26 00:00 UT   10 44 05.9   +09 07 28     2.607    2.699   84.6   21.4   292   12.0 
2025-11-27 00:00 UT   10 45 00.2   +09 03 29     2.593    2.699   85.4   21.4   292   12.0 
2025-11-28 00:00 UT   10 45 53.7   +08 59 36     2.579    2.699   86.1   21.4   292   12.0 
2025-11-29 00:00 UT   10 46 46.4   +08 55 48     2.566    2.699   86.9   21.4   292   12.0 
2025-11-30 00:00 UT   10 47 38.1   +08 52 07     2.552    2.699   87.7   21.4   292   12.0 
2025-12-01 00:00 UT   10 48 28.8   +08 48 31     2.538    2.699   88.5   21.4   292   12.0 
2025-12-02 00:00 UT   10 49 18.7   +08 45 02     2.524    2.699   89.3   21.4   292   11.9 
2025-12-03 00:00 UT   10 50 07.6   +08 41 39     2.511    2.699   90.1   21.4   292   11.9 
2025-12-04 00:00 UT   10 50 55.5   +08 38 22     2.497    2.699   90.9   21.4   292   11.9 
2025-12-05 00:00 UT   10 51 42.5   +08 35 12     2.483    2.699   91.8   21.4   292   11.9 
2025-12-06 00:00 UT   10 52 28.4   +08 32 09     2.469    2.699   92.6   21.4   292   11.9 
2025-12-07 00:00 UT   10 53 13.4   +08 29 12     2.456    2.699   93.4   21.4   292   11.9 

    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.