(31) Euphrosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Jun 2026	12.7	3.843 AU	2.946 AU	18h33m	-54°56'	147.6°	8.1°
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)                : 0.2157958
            a (Semimajor axis)              : 3.1618987
            i (Inclination)                 : 26.30908
            Ω (Longitude of ascending node) : 30.78657
            ω (Argument of perihelion)      : 62.00908
            M (Mean anomaly)                : 182.91458
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 90.12188
            B (Latitude of perihelion)      : 23.03959
            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
2026-06-20 00:00 UT   18 33 23.0   -54 56 06     2.946    3.843  147.6    8.1   342   12.7 
2026-06-20 19:09 UT   18 32 24.7   -54 59 01     2.945    3.842  147.7    8.1   344   12.7 
2026-06-21 00:00 UT   18 32 09.9   -54 59 44     2.944    3.842  147.8    8.1   345   12.7 
2026-06-22 00:00 UT   18 30 56.2   -55 03 10     2.943    3.842  147.9    8.1   347   12.7 
2026-06-23 00:00 UT   18 29 42.1   -55 06 23     2.942    3.842  148.0    8.1   349   12.7 
2026-06-24 00:00 UT   18 28 27.4   -55 09 22     2.942    3.842  148.1    8.0   352   12.7 
2026-06-25 00:00 UT   18 27 12.4   -55 12 09     2.941    3.842  148.1    8.0   354   12.7 
2026-06-26 00:00 UT   18 25 57.1   -55 14 42     2.941    3.842  148.1    8.0   356   12.7 
2026-06-27 00:00 UT   18 24 41.6   -55 17 02     2.941    3.842  148.1    8.0   359   12.7 
2026-06-28 00:00 UT   18 23 25.9   -55 19 09     2.942    3.841  148.0    8.1     1   12.7 
2026-06-29 00:00 UT   18 22 10.2   -55 21 03     2.942    3.841  147.9    8.1     3   12.7 
2026-06-30 00:00 UT   18 20 54.4   -55 22 43     2.943    3.841  147.7    8.1     6   12.7 
2026-07-01 00:00 UT   18 19 38.8   -55 24 09     2.944    3.841  147.6    8.2     8   12.7 
2026-07-02 00:00 UT   18 18 23.2   -55 25 23     2.946    3.841  147.3    8.2    10   12.7 
2026-07-03 00:00 UT   18 17 07.9   -55 26 22     2.947    3.841  147.1    8.3    13   12.7 
2026-07-04 00:00 UT   18 15 52.9   -55 27 09     2.949    3.840  146.8    8.3    15   12.7 
2026-07-05 00:00 UT   18 14 38.3   -55 27 42     2.951    3.840  146.5    8.4    17   12.7 
2026-07-06 00:00 UT   18 13 24.1   -55 28 02     2.953    3.840  146.2    8.5    19   12.7 
2026-07-07 00:00 UT   18 12 10.5   -55 28 09     2.956    3.840  145.8    8.6    21   12.7 
2026-07-08 00:00 UT   18 10 57.4   -55 28 03     2.959    3.840  145.4    8.6    23   12.7 
2026-07-09 00:00 UT   18 09 45.0   -55 27 45     2.962    3.840  145.0    8.7    25   12.7 
2026-07-10 00:00 UT   18 08 33.3   -55 27 13     2.965    3.839  144.6    8.8    27   12.7 
2026-07-11 00:00 UT   18 07 22.4   -55 26 29     2.969    3.839  144.1    8.9    29   12.7 
2026-07-12 00:00 UT   18 06 12.4   -55 25 32     2.973    3.839  143.6    9.0    31   12.7 
2026-07-13 00:00 UT   18 05 03.4   -55 24 23     2.977    3.839  143.1    9.1    33   12.7 
2026-07-14 00:00 UT   18 03 55.3   -55 23 02     2.981    3.838  142.6    9.3    35   12.7 
2026-07-15 00:00 UT   18 02 48.3   -55 21 29     2.985    3.838  142.0    9.4    37   12.7 
2026-07-16 00:00 UT   18 01 42.5   -55 19 45     2.990    3.838  141.5    9.5    38   12.7 
2026-07-17 00:00 UT   18 00 37.9   -55 17 49     2.995    3.838  140.9    9.6    40   12.8 
2026-07-18 00:00 UT   17 59 34.5   -55 15 43     3.000    3.838  140.3    9.7    42   12.8 
2026-07-19 00:00 UT   17 58 32.5   -55 13 25     3.006    3.837  139.7    9.9    43   12.8 
2026-07-20 00:00 UT   17 57 31.8   -55 10 57     3.011    3.837  139.0   10.0    45   12.8 

    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.