(11) Parthenope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Feb 2026	10.6	2.693 AU	1.746 AU	10h54m	+10°36'	159.7°	7.3°
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
2026-02-10 00:00 UT   10 54 41.4   +10 36 59     1.746    2.693  159.7    7.3   283   10.6 
2026-02-10 11:22 UT   10 54 20.2   +10 40 09     1.743    2.693  160.3    7.1   283   10.6 
2026-02-11 00:00 UT   10 53 56.3   +10 43 41     1.741    2.693  160.9    6.9   282   10.6 
2026-02-12 00:00 UT   10 53 10.2   +10 50 28     1.736    2.693  162.1    6.5   282   10.6 
2026-02-13 00:00 UT   10 52 23.0   +10 57 19     1.732    2.693  163.3    6.0   281   10.5 
2026-02-14 00:00 UT   10 51 34.9   +11 04 13     1.728    2.692  164.5    5.6   280   10.5 
2026-02-15 00:00 UT   10 50 46.0   +11 11 10     1.724    2.692  165.7    5.2   278   10.5 
2026-02-16 00:00 UT   10 49 56.2   +11 18 09     1.720    2.692  166.9    4.8   277   10.5 
2026-02-17 00:00 UT   10 49 05.6   +11 25 11     1.717    2.692  168.1    4.3   275   10.4 
2026-02-18 00:00 UT   10 48 14.3   +11 32 14     1.714    2.691  169.3    3.9   273   10.4 
2026-02-19 00:00 UT   10 47 22.3   +11 39 19     1.711    2.691  170.4    3.5   270   10.4 
2026-02-20 00:00 UT   10 46 29.8   +11 46 24     1.709    2.691  171.6    3.1   266   10.4 
2026-02-21 00:00 UT   10 45 36.7   +11 53 30     1.707    2.690  172.6    2.7   262   10.3 
2026-02-22 00:00 UT   10 44 43.2   +12 00 35     1.705    2.690  173.7    2.3   256   10.3 
2026-02-23 00:00 UT   10 43 49.3   +12 07 39     1.703    2.690  174.6    2.0   248   10.3 
2026-02-24 00:00 UT   10 42 55.0   +12 14 42     1.702    2.690  175.4    1.7   236   10.2 
2026-02-25 00:00 UT   10 42 00.5   +12 21 43     1.701    2.689  176.0    1.5   221   10.2 
2026-02-26 00:00 UT   10 41 05.7   +12 28 42     1.700    2.689  176.1    1.4   203   10.2 
2026-02-27 00:00 UT   10 40 10.9   +12 35 38     1.700    2.689  175.9    1.5   185   10.2 
2026-02-28 00:00 UT   10 39 16.0   +12 42 31     1.700    2.688  175.4    1.7   170   10.2 
2026-03-01 00:00 UT   10 38 21.0   +12 49 20     1.700    2.688  174.6    2.0   159   10.3 
2026-03-02 00:00 UT   10 37 26.2   +12 56 06     1.701    2.688  173.7    2.3   150   10.3 
2026-03-03 00:00 UT   10 36 31.4   +13 02 47     1.702    2.688  172.6    2.7   144   10.3 
2026-03-04 00:00 UT   10 35 36.9   +13 09 24     1.703    2.687  171.6    3.1   140   10.3 
2026-03-05 00:00 UT   10 34 42.6   +13 15 55     1.704    2.687  170.4    3.5   136   10.4 
2026-03-06 00:00 UT   10 33 48.6   +13 22 21     1.706    2.687  169.3    3.9   134   10.4 
2026-03-07 00:00 UT   10 32 55.0   +13 28 41     1.708    2.686  168.1    4.4   131   10.4 
2026-03-08 00:00 UT   10 32 01.8   +13 34 55     1.710    2.686  166.9    4.8   129   10.4 
2026-03-09 00:00 UT   10 31 09.2   +13 41 02     1.712    2.686  165.8    5.2   128   10.5 
2026-03-10 00:00 UT   10 30 17.1   +13 47 02     1.715    2.685  164.6    5.6   127   10.5 
2026-03-11 00:00 UT   10 29 25.6   +13 52 55     1.718    2.685  163.4    6.1   125   10.5 
2026-03-12 00:00 UT   10 28 34.8   +13 58 41     1.721    2.685  162.2    6.5   124   10.5 

    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.