(31) Euphrosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Sep 2025	13.5	3.712 AU	4.204 AU	14h45m	-28°42'	54.5°	12.7°
Opposition	25 Jun 2026	12.6	3.841 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)                : 0.2159829
            a (Semimajor axis)              : 3.1610744
            i (Inclination)                 : 26.31587
            Ω (Longitude of ascending node) : 30.80053
            ω (Argument of perihelion)      : 61.92662
            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
2025-09-17 00:00 UT   14 45 08.0   -28 42 54     4.204    3.712   54.5   12.7   117   13.5 
2025-09-17 21:32 UT   14 46 03.8   -28 47 18     4.215    3.713   53.9   12.6   117   13.5 
2025-09-18 00:00 UT   14 46 10.3   -28 47 48     4.217    3.713   53.8   12.6   117   13.5 
2025-09-19 00:00 UT   14 47 13.1   -28 52 44     4.229    3.714   53.1   12.5   117   13.5 
2025-09-20 00:00 UT   14 48 16.4   -28 57 41     4.241    3.715   52.4   12.4   117   13.5 
2025-09-21 00:00 UT   14 49 20.1   -29 02 40     4.254    3.717   51.7   12.2   117   13.5 
2025-09-22 00:00 UT   14 50 24.4   -29 07 40     4.266    3.718   51.0   12.1   118   13.5 
2025-09-23 00:00 UT   14 51 29.2   -29 12 42     4.278    3.719   50.4   12.0   118   13.5 
2025-09-24 00:00 UT   14 52 34.4   -29 17 45     4.290    3.720   49.7   11.9   118   13.5 
2025-09-25 00:00 UT   14 53 40.1   -29 22 49     4.301    3.721   49.0   11.7   118   13.5 
2025-09-26 00:00 UT   14 54 46.2   -29 27 55     4.313    3.722   48.3   11.6   118   13.5 
2025-09-27 00:00 UT   14 55 52.8   -29 33 02     4.324    3.723   47.6   11.5   118   13.5 
2025-09-28 00:00 UT   14 56 59.9   -29 38 10     4.336    3.724   46.9   11.3   119   13.5 
2025-09-29 00:00 UT   14 58 07.3   -29 43 19     4.347    3.725   46.2   11.2   119   13.6 
2025-09-30 00:00 UT   14 59 15.2   -29 48 29     4.358    3.726   45.5   11.1   119   13.6 
2025-10-01 00:00 UT   15 00 23.6   -29 53 40     4.369    3.727   44.9   10.9   119   13.6 
2025-10-02 00:00 UT   15 01 32.3   -29 58 52     4.380    3.728   44.2   10.8   120   13.6 
2025-10-03 00:00 UT   15 02 41.5   -30 04 05     4.390    3.729   43.5   10.6   120   13.6 
2025-10-04 00:00 UT   15 03 51.1   -30 09 19     4.401    3.730   42.8   10.5   120   13.6 
2025-10-05 00:00 UT   15 05 01.1   -30 14 33     4.411    3.731   42.2   10.4   120   13.6 
2025-10-06 00:00 UT   15 06 11.5   -30 19 49     4.421    3.732   41.5   10.2   121   13.6 
2025-10-07 00:00 UT   15 07 22.2   -30 25 05     4.431    3.733   40.8   10.1   121   13.6 
2025-10-08 00:00 UT   15 08 33.4   -30 30 21     4.441    3.734   40.2    9.9   121   13.6 
2025-10-09 00:00 UT   15 09 45.0   -30 35 39     4.451    3.734   39.5    9.8   121   13.6 
2025-10-10 00:00 UT   15 10 56.9   -30 40 57     4.460    3.735   38.8    9.7   122   13.6 
2025-10-11 00:00 UT   15 12 09.2   -30 46 15     4.470    3.736   38.2    9.5   122   13.6 
2025-10-12 00:00 UT   15 13 21.9   -30 51 35     4.479    3.737   37.5    9.4   122   13.5 
2025-10-13 00:00 UT   15 14 35.0   -30 56 54     4.488    3.738   36.9    9.2   123   13.5 
2025-10-14 00:00 UT   15 15 48.5   -31 02 14     4.497    3.739   36.2    9.1   123   13.5 
2025-10-15 00:00 UT   15 17 02.3   -31 07 35     4.506    3.740   35.6    8.9   123   13.5 
2025-10-16 00:00 UT   15 18 16.4   -31 12 56     4.515    3.741   34.9    8.8   124   13.5 
2025-10-17 00:00 UT   15 19 30.9   -31 18 18     4.524    3.742   34.3    8.6   124   13.5 

    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.