(11) Parthenope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Nov 2026	11.8	2.497 AU	3.462 AU	14h34m	-11°36'	10.8°	4.3°
Opposition	30 Jun 2027	9.2	2.261 AU	1.246 AU	18h38m	-19°20'	176.1°	1.8°

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)                : 0.1008882
            a (Semimajor axis)              : 2.4522592
            i (Inclination)                 : 4.63618
            Ω (Longitude of ascending node) : 125.46946
            ω (Argument of perihelion)      : 196.45557
            M (Mean anomaly)                : 224.94245
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 141.87409
            B (Latitude of perihelion)      : -1.31198
            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
2026-11-13 00:00 UT   14 34 21.1   -11 36 51     3.462    2.497   10.8    4.3   306   11.8 
2026-11-13 02:34 UT   14 34 32.6   -11 37 46     3.462    2.497   10.9    4.3   306   11.8 
2026-11-14 00:00 UT   14 36 08.6   -11 45 20     3.459    2.496   11.4    4.5   305   11.8 
2026-11-15 00:00 UT   14 37 56.2   -11 53 44     3.455    2.495   11.9    4.7   304   11.8 
2026-11-16 00:00 UT   14 39 44.1   -12 02 05     3.451    2.494   12.4    4.9   303   11.8 
2026-11-17 00:00 UT   14 41 32.0   -12 10 23     3.447    2.493   12.9    5.1   302   11.8 
2026-11-18 00:00 UT   14 43 20.1   -12 18 38     3.443    2.492   13.5    5.3   302   11.8 
2026-11-19 00:00 UT   14 45 08.4   -12 26 48     3.438    2.491   14.0    5.5   301   11.8 
2026-11-20 00:00 UT   14 46 56.7   -12 34 56     3.434    2.490   14.5    5.7   300   11.8 
2026-11-21 00:00 UT   14 48 45.3   -12 42 59     3.429    2.489   15.1    5.9   300   11.9 
2026-11-22 00:00 UT   14 50 33.9   -12 50 59     3.425    2.487   15.6    6.1   299   11.9 
2026-11-23 00:00 UT   14 52 22.7   -12 58 55     3.420    2.486   16.1    6.3   299   11.9 
2026-11-24 00:00 UT   14 54 11.7   -13 06 48     3.415    2.485   16.7    6.5   298   11.9 
2026-11-25 00:00 UT   14 56 00.7   -13 14 36     3.410    2.484   17.2    6.8   298   11.9 
2026-11-26 00:00 UT   14 57 49.9   -13 22 21     3.405    2.483   17.7    7.0   297   11.9 
2026-11-27 00:00 UT   14 59 39.3   -13 30 02     3.400    2.482   18.3    7.2   297   11.9 
2026-11-28 00:00 UT   15 01 28.7   -13 37 39     3.394    2.481   18.8    7.4   296   11.9 
2026-11-29 00:00 UT   15 03 18.3   -13 45 11     3.389    2.480   19.4    7.6   296   11.9 
2026-11-30 00:00 UT   15 05 08.1   -13 52 40     3.383    2.479   19.9    7.8   295   11.9 
2026-12-01 00:00 UT   15 06 57.9   -14 00 05     3.378    2.478   20.5    8.0   295   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.