(31) Euphrosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	24 Oct 2025	13.5	3.748 AU	4.579 AU	15h28m	-31°55'	29.8°	7.6°
Opposition	25 Jun 2026	12.6	3.842 AU	2.941 AU	18h26m	-55°13'	148.1°	8.0°

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)                : 0.2159207
            a (Semimajor axis)              : 3.1615053
            i (Inclination)                 : 26.31223
            Ω (Longitude of ascending node) : 30.79590
            ω (Argument of perihelion)      : 61.97074
            M (Mean anomaly)                : 147.89313
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 90.08994
            B (Latitude of perihelion)      : 23.03362
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-24 00:00 UT   15 28 22.3   -31 55 54     4.579    3.748   29.8    7.6   128   13.5 
2025-10-24 00:15 UT   15 28 23.1   -31 55 58     4.579    3.748   29.8    7.6   128   13.5 
2025-10-25 00:00 UT   15 29 39.5   -32 01 18     4.586    3.749   29.2    7.4   128   13.5 
2025-10-26 00:00 UT   15 30 57.0   -32 06 41     4.593    3.750   28.6    7.3   129   13.5 
2025-10-27 00:00 UT   15 32 14.8   -32 12 04     4.600    3.751   28.0    7.1   129   13.5 
2025-10-28 00:00 UT   15 33 32.9   -32 17 27     4.607    3.752   27.3    7.0   130   13.5 
2025-10-29 00:00 UT   15 34 51.3   -32 22 50     4.613    3.753   26.7    6.8   131   13.5 
2025-10-30 00:00 UT   15 36 10.0   -32 28 13     4.620    3.754   26.1    6.7   131   13.5 
2025-10-31 00:00 UT   15 37 28.9   -32 33 35     4.626    3.755   25.5    6.5   132   13.5 
2025-11-01 00:00 UT   15 38 48.1   -32 38 58     4.632    3.756   25.0    6.4   133   13.5 
2025-11-02 00:00 UT   15 40 07.6   -32 44 20     4.638    3.756   24.4    6.3   134   13.5 
2025-11-03 00:00 UT   15 41 27.4   -32 49 43     4.644    3.757   23.8    6.1   135   13.5 
2025-11-04 00:00 UT   15 42 47.4   -32 55 04     4.649    3.758   23.2    6.0   135   13.5 
2025-11-05 00:00 UT   15 44 07.7   -33 00 26     4.654    3.759   22.7    5.8   136   13.5 
2025-11-06 00:00 UT   15 45 28.2   -33 05 47     4.660    3.760   22.1    5.7   137   13.5 
2025-11-07 00:00 UT   15 46 49.0   -33 11 08     4.665    3.761   21.6    5.6   139   13.5 
2025-11-08 00:00 UT   15 48 10.0   -33 16 29     4.669    3.761   21.0    5.4   140   13.5 
2025-11-09 00:00 UT   15 49 31.3   -33 21 49     4.674    3.762   20.5    5.3   141   13.5 
2025-11-10 00:00 UT   15 50 52.8   -33 27 09     4.679    3.763   20.0    5.2   142   13.5 
2025-11-11 00:00 UT   15 52 14.6   -33 32 28     4.683    3.764   19.5    5.0   143   13.5 
2025-11-12 00:00 UT   15 53 36.6   -33 37 47     4.687    3.765   19.0    4.9   145   13.5 
2025-11-13 00:00 UT   15 54 58.8   -33 43 06     4.691    3.766   18.5    4.8   146   13.5 
2025-11-14 00:00 UT   15 56 21.3   -33 48 24     4.695    3.766   18.0    4.7   148   13.5 
2025-11-15 00:00 UT   15 57 43.9   -33 53 41     4.698    3.767   17.6    4.6   149   13.4 
2025-11-16 00:00 UT   15 59 06.8   -33 58 58     4.702    3.768   17.2    4.4   151   13.4 
2025-11-17 00:00 UT   16 00 29.9   -34 04 15     4.705    3.769   16.7    4.3   153   13.4 
2025-11-18 00:00 UT   16 01 53.2   -34 09 31     4.708    3.770   16.3    4.2   155   13.4 
2025-11-19 00:00 UT   16 03 16.7   -34 14 46     4.711    3.770   16.0    4.1   157   13.4 
2025-11-20 00:00 UT   16 04 40.3   -34 20 01     4.714    3.771   15.6    4.0   159   13.4 
2025-11-21 00:00 UT   16 06 04.2   -34 25 15     4.716    3.772   15.3    4.0   161   13.4 

    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.