(11) Parthenope
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 Jun 2023	9.5	2.340 AU	1.332 AU	17h02m	-16°21'	171.8°	3.6°
Opposition	5 Jun 2023	9.5	2.336 AU	1.325 AU	16h59m	-16°20'	173.6°	2.8°

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)                : 0.0994175
            a (Semimajor axis)              : 2.4530690
            i (Inclination)                 : 4.63133
            Ω (Longitude of ascending node) : 125.52088
            ω (Argument of perihelion)      : 195.73723
            M (Mean anomaly)                : 277.86276
            Epoch                           : 2023 Feb 25

            L (Longitude of perihelion)     : 141.20926
            B (Latitude of perihelion)      : -1.25487
            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
2023-06-02 00:00 UT   17 02 33.7   -16 21 30     1.332    2.340  171.8    3.6   225    9.5 
2023-06-02 21:26 UT   17 01 41.5   -16 21 11     1.330    2.339  172.4    3.3   219    9.5 
2023-06-03 00:00 UT   17 01 35.3   -16 21 09     1.330    2.339  172.5    3.3   218    9.5 
2023-06-04 00:00 UT   17 00 36.4   -16 20 50     1.328    2.338  173.0    3.0   210    9.5 
2023-06-05 00:00 UT   16 59 37.3   -16 20 34     1.326    2.337  173.5    2.8   201    9.5 
2023-06-06 00:00 UT   16 58 37.9   -16 20 22     1.325    2.336  173.7    2.7   190    9.5 
2023-06-07 00:00 UT   16 57 38.3   -16 20 13     1.323    2.335  173.7    2.7   179    9.5 
2023-06-08 00:00 UT   16 56 38.6   -16 20 08     1.323    2.334  173.4    2.8   169    9.5 
2023-06-09 00:00 UT   16 55 38.9   -16 20 06     1.322    2.333  173.0    3.0   160    9.5 
2023-06-10 00:00 UT   16 54 39.2   -16 20 08     1.322    2.332  172.4    3.3   151    9.5 
2023-06-11 00:00 UT   16 53 39.7   -16 20 13     1.321    2.331  171.7    3.6   145    9.5 
2023-06-12 00:00 UT   16 52 40.4   -16 20 22     1.322    2.330  170.9    4.0   139    9.5 
2023-06-13 00:00 UT   16 51 41.4   -16 20 35     1.322    2.329  170.0    4.3   134    9.6 
2023-06-14 00:00 UT   16 50 42.8   -16 20 52     1.323    2.328  169.1    4.7   130    9.6 
2023-06-15 00:00 UT   16 49 44.7   -16 21 12     1.323    2.327  168.1    5.2   127    9.6 
2023-06-16 00:00 UT   16 48 47.1   -16 21 37     1.325    2.326  167.1    5.6   124    9.6 
2023-06-17 00:00 UT   16 47 50.1   -16 22 06     1.326    2.325  166.0    6.1   122    9.6 
2023-06-18 00:00 UT   16 46 53.8   -16 22 40     1.328    2.324  165.0    6.5   120    9.7 
2023-06-19 00:00 UT   16 45 58.3   -16 23 17     1.329    2.323  163.9    7.0   118    9.7 
2023-06-20 00:00 UT   16 45 03.7   -16 23 59     1.332    2.322  162.8    7.4   117    9.7 
2023-06-21 00:00 UT   16 44 09.9   -16 24 46     1.334    2.321  161.7    7.9   115    9.7 
2023-06-22 00:00 UT   16 43 17.2   -16 25 37     1.336    2.320  160.6    8.3   114    9.8 
2023-06-23 00:00 UT   16 42 25.6   -16 26 33     1.339    2.319  159.5    8.8   113    9.8 
2023-06-24 00:00 UT   16 41 35.1   -16 27 33     1.342    2.318  158.5    9.3   112    9.8 
2023-06-25 00:00 UT   16 40 45.8   -16 28 38     1.346    2.317  157.4    9.7   112    9.8 
2023-06-26 00:00 UT   16 39 57.7   -16 29 47     1.349    2.316  156.3   10.2   111    9.9 
2023-06-27 00:00 UT   16 39 10.9   -16 31 01     1.353    2.315  155.2   10.6   110    9.9 
2023-06-28 00:00 UT   16 38 25.5   -16 32 20     1.357    2.314  154.1   11.1   109    9.9 
2023-06-29 00:00 UT   16 37 41.5   -16 33 44     1.361    2.313  153.0   11.5   109    9.9 
2023-06-30 00:00 UT   16 36 59.0   -16 35 12     1.365    2.312  151.9   12.0   108    9.9 
2023-07-01 00:00 UT   16 36 18.0   -16 36 46     1.370    2.311  150.8   12.4   108   10.0 
2023-07-02 00:00 UT   16 35 38.5   -16 38 23     1.375    2.310  149.7   12.8   107   10.0 

    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.