(31) Euphrosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Dec 2025	13.5	3.794 AU	4.702 AU	16h50m	-37°01'	20.2°	5.1°
Opposition	25 Jun 2026	12.7	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
2025-12-22 00:00 UT   16 50 25.5   -37 01 12     4.702    3.794   20.2    5.1   233   13.5 
2025-12-22 16:43 UT   16 51 26.0   -37 04 33     4.700    3.795   20.6    5.2   234   13.5 
2025-12-23 00:00 UT   16 51 52.3   -37 06 01     4.699    3.795   20.7    5.3   234   13.5 
2025-12-24 00:00 UT   16 53 19.2   -37 10 49     4.695    3.796   21.3    5.4   235   13.5 
2025-12-25 00:00 UT   16 54 46.0   -37 15 37     4.692    3.796   21.8    5.5   236   13.5 
2025-12-26 00:00 UT   16 56 12.8   -37 20 23     4.688    3.797   22.4    5.7   237   13.5 
2025-12-27 00:00 UT   16 57 39.6   -37 25 09     4.684    3.798   23.0    5.8   238   13.6 
2025-12-28 00:00 UT   16 59 06.4   -37 29 54     4.679    3.798   23.5    5.9   239   13.6 
2025-12-29 00:00 UT   17 00 33.1   -37 34 38     4.675    3.799   24.1    6.1   240   13.6 
2025-12-30 00:00 UT   17 01 59.8   -37 39 22     4.670    3.799   24.7    6.2   241   13.6 
2025-12-31 00:00 UT   17 03 26.4   -37 44 05     4.666    3.800   25.3    6.4   242   13.6 
2026-01-01 00:00 UT   17 04 52.9   -37 48 47     4.661    3.801   25.9    6.5   242   13.6 
2026-01-02 00:00 UT   17 06 19.4   -37 53 29     4.656    3.801   26.5    6.6   243   13.6 
2026-01-03 00:00 UT   17 07 45.8   -37 58 10     4.650    3.802   27.1    6.8   244   13.6 
2026-01-04 00:00 UT   17 09 12.1   -38 02 50     4.645    3.802   27.8    6.9   244   13.6 
2026-01-05 00:00 UT   17 10 38.4   -38 07 30     4.639    3.803   28.4    7.1   245   13.6 
2026-01-06 00:00 UT   17 12 04.5   -38 12 09     4.633    3.804   29.0    7.2   246   13.6 
2026-01-07 00:00 UT   17 13 30.6   -38 16 48     4.628    3.804   29.7    7.3   246   13.6 
2026-01-08 00:00 UT   17 14 56.6   -38 21 26     4.621    3.805   30.3    7.5   247   13.6 
2026-01-09 00:00 UT   17 16 22.4   -38 26 03     4.615    3.805   30.9    7.6   247   13.6 
2026-01-10 00:00 UT   17 17 48.1   -38 30 41     4.609    3.806   31.6    7.8   248   13.6 
2026-01-11 00:00 UT   17 19 13.8   -38 35 17     4.602    3.807   32.2    7.9   248   13.6 
2026-01-12 00:00 UT   17 20 39.2   -38 39 54     4.595    3.807   32.9    8.1   249   13.6 
2026-01-13 00:00 UT   17 22 04.6   -38 44 29     4.588    3.808   33.5    8.2   249   13.6 
2026-01-14 00:00 UT   17 23 29.8   -38 49 05     4.581    3.808   34.2    8.3   249   13.6 
2026-01-15 00:00 UT   17 24 54.8   -38 53 40     4.574    3.809   34.9    8.5   250   13.6 
2026-01-16 00:00 UT   17 26 19.7   -38 58 15     4.567    3.809   35.5    8.6   250   13.6 
2026-01-17 00:00 UT   17 27 44.3   -39 02 50     4.559    3.810   36.2    8.8   251   13.6 
2026-01-18 00:00 UT   17 29 08.8   -39 07 24     4.551    3.810   36.9    8.9   251   13.6 
2026-01-19 00:00 UT   17 30 33.2   -39 11 59     4.543    3.811   37.6    9.1   251   13.6 
2026-01-20 00:00 UT   17 31 57.3   -39 16 33     4.535    3.811   38.2    9.2   252   13.6 

    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.