(194) Prokne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Dec 2025	12.6	3.022 AU	2.165 AU	07h27m	+00°01'	144.6°	10.9°
Opposition	8 Jan 2026	12.4	3.058 AU	2.120 AU	07h07m	+01°03'	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)                : 0.2371862
            a (Semimajor axis)              : 2.6182164
            i (Inclination)                 : 18.51167
            Ω (Longitude of ascending node) : 159.19113
            ω (Argument of perihelion)      : 163.47251
            M (Mean anomaly)                : 114.13733
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 143.47548
            B (Latitude of perihelion)      : 5.18203
            P (Orbital period in years)     : 4.24            
        

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
2025-12-17 00:00 UT   07 27 29.6   +00 01 39     2.165    3.022  144.6   10.9   313   12.6 
2025-12-17 12:45 UT   07 27 05.6   +00 02 00     2.162    3.023  145.1   10.7   314   12.6 
2025-12-18 00:00 UT   07 26 44.3   +00 02 21     2.160    3.023  145.5   10.6   314   12.6 
2025-12-19 00:00 UT   07 25 58.0   +00 03 15     2.156    3.025  146.5   10.4   316   12.6 
2025-12-20 00:00 UT   07 25 10.8   +00 04 20     2.151    3.027  147.4   10.1   317   12.6 
2025-12-21 00:00 UT   07 24 22.8   +00 05 37     2.147    3.028  148.2    9.8   319   12.5 
2025-12-22 00:00 UT   07 23 33.9   +00 07 06     2.143    3.030  149.1    9.6   320   12.5 
2025-12-23 00:00 UT   07 22 44.2   +00 08 46     2.140    3.032  150.0    9.3   322   12.5 
2025-12-24 00:00 UT   07 21 53.8   +00 10 37     2.136    3.033  150.8    9.1   324   12.5 
2025-12-25 00:00 UT   07 21 02.6   +00 12 41     2.133    3.035  151.6    8.9   326   12.5 
2025-12-26 00:00 UT   07 20 10.9   +00 14 56     2.131    3.036  152.4    8.6   328   12.5 
2025-12-27 00:00 UT   07 19 18.5   +00 17 22     2.128    3.038  153.1    8.4   330   12.5 
2025-12-28 00:00 UT   07 18 25.6   +00 20 00     2.126    3.040  153.8    8.2   332   12.5 
2025-12-29 00:00 UT   07 17 32.2   +00 22 50     2.124    3.041  154.5    8.0   335   12.5 
2025-12-30 00:00 UT   07 16 38.4   +00 25 51     2.122    3.043  155.2    7.8   337   12.4 
2025-12-31 00:00 UT   07 15 44.2   +00 29 03     2.121    3.044  155.8    7.6   340   12.4 
2026-01-01 00:00 UT   07 14 49.7   +00 32 27     2.120    3.046  156.3    7.5   342   12.4 
2026-01-02 00:00 UT   07 13 54.9   +00 36 01     2.119    3.047  156.8    7.3   345   12.4 
2026-01-03 00:00 UT   07 12 59.9   +00 39 47     2.118    3.049  157.3    7.2   348   12.4 
2026-01-04 00:00 UT   07 12 04.7   +00 43 43     2.118    3.051  157.7    7.0   351   12.4 
2026-01-05 00:00 UT   07 11 09.3   +00 47 50     2.118    3.052  158.0    6.9   354   12.4 
2026-01-06 00:00 UT   07 10 13.9   +00 52 08     2.118    3.054  158.3    6.8   358   12.4 
2026-01-07 00:00 UT   07 09 18.5   +00 56 36     2.119    3.055  158.5    6.8     1   12.4 
2026-01-08 00:00 UT   07 08 23.2   +01 01 15     2.120    3.057  158.6    6.7     4   12.4 
2026-01-09 00:00 UT   07 07 27.9   +01 06 03     2.121    3.058  158.7    6.7     8   12.4 
2026-01-10 00:00 UT   07 06 32.8   +01 11 02     2.123    3.060  158.7    6.7    11   12.4 
2026-01-11 00:00 UT   07 05 37.9   +01 16 10     2.124    3.061  158.7    6.7    15   12.4 
2026-01-12 00:00 UT   07 04 43.2   +01 21 28     2.126    3.063  158.5    6.8    18   12.4 
2026-01-13 00:00 UT   07 03 48.9   +01 26 55     2.129    3.064  158.3    6.8    21   12.4 
2026-01-14 00:00 UT   07 02 54.9   +01 32 31     2.131    3.066  158.1    6.9    24   12.4 
2026-01-15 00:00 UT   07 02 01.4   +01 38 16     2.134    3.067  157.7    7.0    28   12.4 
2026-01-16 00:00 UT   07 01 08.3   +01 44 09     2.137    3.069  157.3    7.1    31   12.4 

    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.