(31) Euphrosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	4 May 2025	11.9	3.534 AU	2.535 AU	14h35m	-24°53'	170.8°	2.6°
Today	20 May 2025	12.1	3.558 AU	2.592 AU	14h20m	-24°55'	159.6°	5.7°

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 Euphrosyne are:

            e (Eccentricity)                : 0.2159829
            a (Semimajor axis)              : 3.1610744
            i (Inclination)                 : 26.31587
            Ω (Longitude of ascending node) : 30.80052
            ω (Argument of perihelion)      : 61.92663
            M (Mean anomaly)                : 112.87325
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 90.04708
            B (Latitude of perihelion)      : 23.02676
            P (Orbital period in years)     : 5.62            
        

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
2025-05-20 00:00 UT   14 20 55.6   -24 55 01     2.592    3.558  159.6    5.7    80   12.1 
2025-05-20 19:16 UT   14 20 13.5   -24 54 44     2.597    3.559  158.8    5.9    81   12.1 
2025-05-21 00:00 UT   14 20 03.2   -24 54 39     2.598    3.560  158.6    6.0    82   12.1 
2025-05-22 00:00 UT   14 19 11.7   -24 54 15     2.605    3.561  157.5    6.2    83   12.1 
2025-05-23 00:00 UT   14 18 21.0   -24 53 50     2.611    3.563  156.5    6.5    84   12.2 
2025-05-24 00:00 UT   14 17 31.3   -24 53 22     2.618    3.564  155.4    6.8    86   12.2 
2025-05-25 00:00 UT   14 16 42.4   -24 52 52     2.625    3.566  154.4    7.1    87   12.2 
2025-05-26 00:00 UT   14 15 54.6   -24 52 22     2.633    3.567  153.3    7.3    88   12.2 
2025-05-27 00:00 UT   14 15 07.8   -24 51 50     2.641    3.569  152.3    7.6    89   12.2 
2025-05-28 00:00 UT   14 14 22.0   -24 51 17     2.649    3.570  151.2    7.9    90   12.3 
2025-05-29 00:00 UT   14 13 37.2   -24 50 44     2.657    3.572  150.2    8.1    90   12.3 
2025-05-30 00:00 UT   14 12 53.6   -24 50 09     2.665    3.573  149.1    8.4    91   12.3 
2025-05-31 00:00 UT   14 12 11.1   -24 49 35     2.674    3.575  148.0    8.6    92   12.3 
2025-06-01 00:00 UT   14 11 29.7   -24 49 01     2.683    3.576  147.0    8.9    93   12.3 
2025-06-02 00:00 UT   14 10 49.4   -24 48 27     2.692    3.578  145.9    9.1    93   12.4 
2025-06-03 00:00 UT   14 10 10.4   -24 47 53     2.701    3.579  144.9    9.4    94   12.4 
2025-06-04 00:00 UT   14 09 32.5   -24 47 19     2.711    3.580  143.8    9.6    95   12.4 
2025-06-05 00:00 UT   14 08 55.8   -24 46 47     2.721    3.582  142.8    9.9    95   12.4 
2025-06-06 00:00 UT   14 08 20.3   -24 46 15     2.731    3.583  141.8   10.1    96   12.4 
2025-06-07 00:00 UT   14 07 46.1   -24 45 44     2.741    3.585  140.7   10.3    96   12.5 
2025-06-08 00:00 UT   14 07 13.1   -24 45 15     2.752    3.586  139.7   10.6    97   12.5 
2025-06-09 00:00 UT   14 06 41.4   -24 44 46     2.763    3.588  138.6   10.8    97   12.5 
2025-06-10 00:00 UT   14 06 10.9   -24 44 20     2.773    3.589  137.6   11.0    98   12.5 
2025-06-11 00:00 UT   14 05 41.6   -24 43 55     2.785    3.591  136.6   11.2    98   12.5 
2025-06-12 00:00 UT   14 05 13.7   -24 43 32     2.796    3.592  135.6   11.4    99   12.5 
2025-06-13 00:00 UT   14 04 47.0   -24 43 11     2.807    3.593  134.5   11.6    99   12.6 
2025-06-14 00:00 UT   14 04 21.5   -24 42 52     2.819    3.595  133.5   11.8    99   12.6 
2025-06-15 00:00 UT   14 03 57.4   -24 42 35     2.831    3.596  132.5   12.0   100   12.6 
2025-06-16 00:00 UT   14 03 34.5   -24 42 21     2.843    3.598  131.5   12.2   100   12.6 
2025-06-17 00:00 UT   14 03 13.0   -24 42 09     2.855    3.599  130.5   12.4   100   12.6 
2025-06-18 00:00 UT   14 02 52.7   -24 41 60     2.868    3.600  129.5   12.6   101   12.6 
2025-06-19 00:00 UT   14 02 33.6   -24 41 54     2.880    3.602  128.5   12.8   101   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.