(11) Parthenope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	25 Feb 2026	10.2	2.689 AU	1.701 AU	10h41m	+12°25'	176.1°	1.4°
Today	12 Mar 2026	10.5	2.685 AU	1.721 AU	10h28m	+13°58'	162.2°	6.5°

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 Parthenope are:

            e (Eccentricity)                : 0.1004774
            a (Semimajor axis)              : 2.4531673
            i (Inclination)                 : 4.63575
            Ω (Longitude of ascending node) : 125.46699
            ω (Argument of perihelion)      : 196.42014
            M (Mean anomaly)                : 173.65693
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 141.83629
            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
2026-03-12 00:00 UT   10 28 34.8   +13 58 41     1.721    2.685  162.2    6.5   124   10.5 
2026-03-12 07:05 UT   10 28 20.0   +14 00 21     1.722    2.684  161.8    6.6   124   10.6 
2026-03-13 00:00 UT   10 27 44.8   +14 04 18     1.725    2.684  161.0    6.9   124   10.6 
2026-03-14 00:00 UT   10 26 55.5   +14 09 48     1.729    2.684  159.8    7.3   123   10.6 
2026-03-15 00:00 UT   10 26 07.1   +14 15 09     1.733    2.684  158.6    7.8   122   10.6 
2026-03-16 00:00 UT   10 25 19.6   +14 20 21     1.737    2.683  157.4    8.2   121   10.6 
2026-03-17 00:00 UT   10 24 33.1   +14 25 24     1.742    2.683  156.2    8.6   121   10.7 
2026-03-18 00:00 UT   10 23 47.6   +14 30 19     1.747    2.682  155.1    9.0   120   10.7 
2026-03-19 00:00 UT   10 23 03.1   +14 35 04     1.752    2.682  153.9    9.4   120   10.7 
2026-03-20 00:00 UT   10 22 19.8   +14 39 39     1.758    2.682  152.7    9.8   119   10.7 
2026-03-21 00:00 UT   10 21 37.7   +14 44 04     1.763    2.681  151.5   10.2   119   10.8 
2026-03-22 00:00 UT   10 20 56.7   +14 48 20     1.769    2.681  150.4   10.6   119   10.8 
2026-03-23 00:00 UT   10 20 17.0   +14 52 26     1.775    2.681  149.2   11.0   118   10.8 
2026-03-24 00:00 UT   10 19 38.6   +14 56 21     1.782    2.680  148.1   11.3   118   10.8 
2026-03-25 00:00 UT   10 19 01.5   +15 00 06     1.788    2.680  146.9   11.7   118   10.8 
2026-03-26 00:00 UT   10 18 25.7   +15 03 41     1.795    2.679  145.8   12.1   117   10.9 
2026-03-27 00:00 UT   10 17 51.3   +15 07 05     1.802    2.679  144.7   12.4   117   10.9 
2026-03-28 00:00 UT   10 17 18.3   +15 10 19     1.809    2.679  143.5   12.8   117   10.9 
2026-03-29 00:00 UT   10 16 46.8   +15 13 23     1.817    2.678  142.4   13.1   117   10.9 
2026-03-30 00:00 UT   10 16 16.7   +15 16 16     1.824    2.678  141.3   13.5   116   11.0 
2026-03-31 00:00 UT   10 15 48.1   +15 18 58     1.832    2.677  140.2   13.8   116   11.0 
2026-04-01 00:00 UT   10 15 20.9   +15 21 31     1.840    2.677  139.1   14.1   116   11.0 
2026-04-02 00:00 UT   10 14 55.3   +15 23 52     1.849    2.676  138.0   14.5   116   11.0 
2026-04-03 00:00 UT   10 14 31.2   +15 26 03     1.857    2.676  136.9   14.8   115   11.0 
2026-04-04 00:00 UT   10 14 08.6   +15 28 04     1.866    2.676  135.9   15.1   115   11.1 
2026-04-05 00:00 UT   10 13 47.5   +15 29 55     1.874    2.675  134.8   15.4   115   11.1 
2026-04-06 00:00 UT   10 13 28.0   +15 31 35     1.883    2.675  133.7   15.7   115   11.1 
2026-04-07 00:00 UT   10 13 10.0   +15 33 05     1.893    2.674  132.7   16.0   115   11.1 
2026-04-08 00:00 UT   10 12 53.6   +15 34 24     1.902    2.674  131.6   16.3   115   11.1 
2026-04-09 00:00 UT   10 12 38.8   +15 35 34     1.911    2.673  130.6   16.5   114   11.2 
2026-04-10 00:00 UT   10 12 25.5   +15 36 33     1.921    2.673  129.6   16.8   114   11.2 
2026-04-11 00:00 UT   10 12 13.8   +15 37 22     1.931    2.672  128.5   17.1   114   11.2 

    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.