(194) Prokne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 Jan 2025	12.5	2.213 AU	2.260 AU	00h04m	-13°07'	74.7°	25.4°
Opposition	8 Jan 2026	12.4	3.057 AU	2.120 AU	07h07m	+01°02'	158.7°	6.7°

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 Prokne are:

            e (Eccentricity)                : 0.2371438
            a (Semimajor axis)              : 2.6160297
            i (Inclination)                 : 18.50921
            Ω (Longitude of ascending node) : 159.25017
            ω (Argument of perihelion)      : 163.20793
            M (Mean anomaly)                : 21.23097
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 143.28132
            B (Latitude of perihelion)      : 5.26217
            P (Orbital period in years)     : 4.23            
        

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
2025-01-02 00:00 UT   00 04 38.1   -13 07 06     2.260    2.213   74.7   25.4    69   12.5 
2025-01-02 20:20 UT   00 05 57.0   -12 59 04     2.271    2.215   74.2   25.3    70   12.5 
2025-01-03 00:00 UT   00 06 11.2   -12 57 37     2.273    2.215   74.1   25.3    70   12.5 
2025-01-04 00:00 UT   00 07 44.7   -12 48 05     2.287    2.218   73.5   25.2    70   12.5 
2025-01-05 00:00 UT   00 09 18.5   -12 38 28     2.300    2.220   72.9   25.0    70   12.5 
2025-01-06 00:00 UT   00 10 52.7   -12 28 49     2.314    2.222   72.3   24.9    70   12.6 
2025-01-07 00:00 UT   00 12 27.1   -12 19 05     2.327    2.225   71.8   24.8    70   12.6 
2025-01-08 00:00 UT   00 14 01.9   -12 09 19     2.340    2.227   71.2   24.7    70   12.6 
2025-01-09 00:00 UT   00 15 37.0   -11 59 29     2.354    2.229   70.6   24.6    71   12.6 
2025-01-10 00:00 UT   00 17 12.3   -11 49 37     2.367    2.231   70.0   24.5    71   12.6 
2025-01-11 00:00 UT   00 18 48.0   -11 39 41     2.380    2.234   69.5   24.3    71   12.6 
2025-01-12 00:00 UT   00 20 23.9   -11 29 43     2.393    2.236   68.9   24.2    71   12.6 
2025-01-13 00:00 UT   00 22 00.1   -11 19 42     2.406    2.238   68.3   24.1    71   12.6 
2025-01-14 00:00 UT   00 23 36.5   -11 09 39     2.419    2.241   67.8   24.0    71   12.6 
2025-01-15 00:00 UT   00 25 13.2   -10 59 33     2.433    2.243   67.2   23.8    71   12.7 
2025-01-16 00:00 UT   00 26 50.1   -10 49 25     2.446    2.246   66.7   23.7    72   12.7 
2025-01-17 00:00 UT   00 28 27.3   -10 39 15     2.459    2.248   66.1   23.6    72   12.7 
2025-01-18 00:00 UT   00 30 04.8   -10 29 03     2.472    2.250   65.5   23.5    72   12.7 
2025-01-19 00:00 UT   00 31 42.5   -10 18 48     2.485    2.253   65.0   23.3    72   12.7 
2025-01-20 00:00 UT   00 33 20.4   -10 08 32     2.498    2.255   64.4   23.2    72   12.7 
2025-01-21 00:00 UT   00 34 58.5   -09 58 14     2.510    2.257   63.9   23.0    73   12.7 

    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.