(194) Prokne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Apr 2026	13.8	3.178 AU	3.229 AU	07h02m	+11°49'	78.2°	18.0°
Opposition	12 Mar 2027	12.2	3.115 AU	2.125 AU	11h37m	+08°51'	174.1°	1.9°

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) : 159.19114
            ω (Argument of perihelion)      : 163.47251
            M (Mean anomaly)                : 114.13733
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 143.47549
            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
2026-04-18 00:00 UT   07 02 29.9   +11 49 26     3.229    3.178   78.2   18.0    99   13.8 
2026-04-18 09:39 UT   07 02 50.9   +11 50 58     3.235    3.179   77.9   18.0    99   13.8 
2026-04-19 00:00 UT   07 03 22.4   +11 53 11     3.243    3.179   77.4   18.0    99   13.8 
2026-04-20 00:00 UT   07 04 15.6   +11 56 51     3.258    3.180   76.7   17.9    99   13.8 
2026-04-21 00:00 UT   07 05 09.5   +12 00 26     3.273    3.181   75.9   17.8    99   13.8 
2026-04-22 00:00 UT   07 06 04.2   +12 03 55     3.287    3.182   75.2   17.8    99   13.9 
2026-04-23 00:00 UT   07 06 59.5   +12 07 18     3.302    3.183   74.4   17.7   100   13.9 
2026-04-24 00:00 UT   07 07 55.5   +12 10 37     3.317    3.184   73.7   17.6   100   13.9 
2026-04-25 00:00 UT   07 08 52.2   +12 13 50     3.331    3.185   72.9   17.6   100   13.9 
2026-04-26 00:00 UT   07 09 49.5   +12 16 57     3.346    3.185   72.2   17.5   100   13.9 
2026-04-27 00:00 UT   07 10 47.5   +12 19 60     3.360    3.186   71.5   17.4   100   13.9 
2026-04-28 00:00 UT   07 11 46.1   +12 22 57     3.374    3.187   70.7   17.3   101   13.9 
2026-04-29 00:00 UT   07 12 45.3   +12 25 49     3.389    3.188   70.0   17.3   101   13.9 
2026-04-30 00:00 UT   07 13 45.1   +12 28 35     3.403    3.189   69.3   17.2   101   13.9 
2026-05-01 00:00 UT   07 14 45.5   +12 31 16     3.417    3.190   68.6   17.1   101   13.9 
2026-05-02 00:00 UT   07 15 46.5   +12 33 52     3.431    3.190   67.8   17.0   101   13.9 
2026-05-03 00:00 UT   07 16 48.0   +12 36 23     3.445    3.191   67.1   16.9   102   13.9 
2026-05-04 00:00 UT   07 17 50.1   +12 38 49     3.459    3.192   66.4   16.8   102   13.9 
2026-05-05 00:00 UT   07 18 52.7   +12 41 09     3.473    3.193   65.7   16.7   102   13.9 
2026-05-06 00:00 UT   07 19 55.9   +12 43 24     3.486    3.193   65.0   16.6   102   14.0 
2026-05-07 00:00 UT   07 20 59.6   +12 45 34     3.500    3.194   64.3   16.5   103   14.0 
2026-05-08 00:00 UT   07 22 03.8   +12 47 39     3.514    3.195   63.6   16.4   103   14.0 
2026-05-09 00:00 UT   07 23 08.5   +12 49 39     3.527    3.196   62.9   16.3   103   14.0 
2026-05-10 00:00 UT   07 24 13.7   +12 51 33     3.541    3.197   62.2   16.2   103   14.0 
2026-05-11 00:00 UT   07 25 19.4   +12 53 23     3.554    3.197   61.5   16.1   103   14.0 
2026-05-12 00:00 UT   07 26 25.6   +12 55 07     3.567    3.198   60.8   16.0   104   14.0 
2026-05-13 00:00 UT   07 27 32.3   +12 56 46     3.581    3.199   60.1   15.9   104   14.0 
2026-05-14 00:00 UT   07 28 39.4   +12 58 20     3.594    3.200   59.4   15.8   104   14.0 
2026-05-15 00:00 UT   07 29 47.0   +12 59 49     3.607    3.200   58.7   15.7   104   14.0 
2026-05-16 00:00 UT   07 30 55.0   +13 01 12     3.620    3.201   58.0   15.5   104   14.0 
2026-05-17 00:00 UT   07 32 03.4   +13 02 31     3.632    3.202   57.3   15.4   105   14.0 
2026-05-18 00:00 UT   07 33 12.3   +13 03 44     3.645    3.202   56.6   15.3   105   14.0 

    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.