(31) Euphrosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Jan 2026	13.7	3.816 AU	4.466 AU	17h43m	-39°53'	43.7°	10.3°
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
2026-01-28 00:00 UT   17 43 01.7   -39 53 05     4.466    3.816   43.7   10.3   254   13.7 
2026-01-28 16:44 UT   17 43 58.8   -39 56 16     4.459    3.816   44.2   10.4   254   13.7 
2026-01-29 00:00 UT   17 44 23.6   -39 57 39     4.457    3.816   44.4   10.4   254   13.7 
2026-01-30 00:00 UT   17 45 45.2   -40 02 14     4.447    3.817   45.1   10.5   254   13.7 
2026-01-31 00:00 UT   17 47 06.5   -40 06 49     4.437    3.817   45.8   10.7   254   13.7 
2026-02-01 00:00 UT   17 48 27.5   -40 11 24     4.428    3.817   46.5   10.8   255   13.7 
2026-02-02 00:00 UT   17 49 48.2   -40 16 00     4.418    3.818   47.2   10.9   255   13.7 
2026-02-03 00:00 UT   17 51 08.6   -40 20 36     4.408    3.818   47.9   11.0   255   13.7 
2026-02-04 00:00 UT   17 52 28.6   -40 25 13     4.398    3.819   48.6   11.2   255   13.7 
2026-02-05 00:00 UT   17 53 48.4   -40 29 50     4.388    3.819   49.4   11.3   255   13.7 
2026-02-06 00:00 UT   17 55 07.7   -40 34 28     4.377    3.820   50.1   11.4   256   13.7 
2026-02-07 00:00 UT   17 56 26.8   -40 39 06     4.367    3.820   50.8   11.5   256   13.7 
2026-02-08 00:00 UT   17 57 45.4   -40 43 45     4.356    3.821   51.5   11.7   256   13.7 
2026-02-09 00:00 UT   17 59 03.7   -40 48 25     4.345    3.821   52.2   11.8   256   13.7 
2026-02-10 00:00 UT   18 00 21.6   -40 53 06     4.334    3.822   52.9   11.9   256   13.7 
2026-02-11 00:00 UT   18 01 39.2   -40 57 47     4.323    3.822   53.6   12.0   256   13.7 
2026-02-12 00:00 UT   18 02 56.3   -41 02 30     4.312    3.823   54.4   12.1   257   13.7 
2026-02-13 00:00 UT   18 04 13.0   -41 07 13     4.301    3.823   55.1   12.2   257   13.7 
2026-02-14 00:00 UT   18 05 29.3   -41 11 57     4.290    3.823   55.8   12.3   257   13.7 
2026-02-15 00:00 UT   18 06 45.1   -41 16 43     4.278    3.824   56.5   12.4   257   13.7 
2026-02-16 00:00 UT   18 08 00.5   -41 21 30     4.267    3.824   57.3   12.6   257   13.6 
2026-02-17 00:00 UT   18 09 15.4   -41 26 18     4.255    3.825   58.0   12.7   257   13.6 
2026-02-18 00:00 UT   18 10 29.9   -41 31 07     4.244    3.825   58.7   12.8   257   13.6 
2026-02-19 00:00 UT   18 11 43.8   -41 35 57     4.232    3.825   59.5   12.9   258   13.6 
2026-02-20 00:00 UT   18 12 57.3   -41 40 49     4.220    3.826   60.2   13.0   258   13.6 
2026-02-21 00:00 UT   18 14 10.3   -41 45 43     4.208    3.826   60.9   13.1   258   13.6 
2026-02-22 00:00 UT   18 15 22.7   -41 50 38     4.196    3.827   61.7   13.2   258   13.6 
2026-02-23 00:00 UT   18 16 34.7   -41 55 34     4.183    3.827   62.4   13.2   258   13.6 
2026-02-24 00:00 UT   18 17 46.0   -42 00 32     4.171    3.827   63.2   13.3   258   13.6 
2026-02-25 00:00 UT   18 18 56.9   -42 05 32     4.159    3.828   63.9   13.4   258   13.6 
2026-02-26 00:00 UT   18 20 07.1   -42 10 33     4.146    3.828   64.6   13.5   259   13.6 
2026-02-27 00:00 UT   18 21 16.9   -42 15 36     4.134    3.828   65.4   13.6   259   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.