(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	30 Apr 2025	11.9	3.492 AU	2.492 AU	14h42m	-07°22'	172.0°	2.3°
Today	13 Jun 2025	12.6	3.496 AU	2.741 AU	14h19m	-04°10'	131.4°	12.6°

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 Mnemosyne are:

            e (Eccentricity)                : 0.1082114
            a (Semimajor axis)              : 3.1553342
            i (Inclination)                 : 15.23284
            Ω (Longitude of ascending node) : 198.89909
            ω (Argument of perihelion)      : 210.95165
            M (Mean anomaly)                : 170.04703
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 228.95458
            B (Latitude of perihelion)      : -7.76626
            P (Orbital period in years)     : 5.60            
        

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
2025-06-13 00:00 UT   14 19 10.4   -04 10 25     2.741    3.496  131.4   12.6   118   12.6 
2025-06-13 21:18 UT   14 18 57.8   -04 08 58     2.751    3.496  130.5   12.8   117   12.6 
2025-06-14 00:00 UT   14 18 56.2   -04 08 47     2.752    3.496  130.4   12.8   117   12.6 
2025-06-15 00:00 UT   14 18 43.1   -04 07 16     2.763    3.496  129.4   13.0   117   12.6 
2025-06-16 00:00 UT   14 18 31.0   -04 05 54     2.774    3.496  128.4   13.2   117   12.7 
2025-06-17 00:00 UT   14 18 19.9   -04 04 39     2.785    3.497  127.4   13.3   116   12.7 
2025-06-18 00:00 UT   14 18 10.0   -04 03 33     2.796    3.497  126.4   13.5   116   12.7 
2025-06-19 00:00 UT   14 18 01.1   -04 02 34     2.808    3.497  125.4   13.7   116   12.7 
2025-06-20 00:00 UT   14 17 53.2   -04 01 42     2.820    3.497  124.5   13.9   116   12.7 
2025-06-21 00:00 UT   14 17 46.5   -04 00 59     2.831    3.497  123.5   14.0   116   12.7 
2025-06-22 00:00 UT   14 17 40.8   -04 00 23     2.843    3.497  122.5   14.2   115   12.8 
2025-06-23 00:00 UT   14 17 36.2   -03 59 55     2.855    3.497  121.6   14.3   115   12.8 
2025-06-24 00:00 UT   14 17 32.6   -03 59 35     2.868    3.497  120.6   14.5   115   12.8 
2025-06-25 00:00 UT   14 17 30.2   -03 59 22     2.880    3.497  119.7   14.6   115   12.8 
2025-06-26 00:00 UT   14 17 28.8   -03 59 16     2.892    3.497  118.7   14.8   115   12.8 
2025-06-27 00:00 UT   14 17 28.5   -03 59 18     2.905    3.497  117.8   14.9   114   12.8 
2025-06-28 00:00 UT   14 17 29.3   -03 59 27     2.918    3.497  116.9   15.0   114   12.8 
2025-06-29 00:00 UT   14 17 31.1   -03 59 43     2.930    3.497  115.9   15.2   114   12.9 
2025-06-30 00:00 UT   14 17 34.0   -04 00 06     2.943    3.497  115.0   15.3   114   12.9 
2025-07-01 00:00 UT   14 17 38.0   -04 00 36     2.956    3.497  114.1   15.4   114   12.9 
2025-07-02 00:00 UT   14 17 43.0   -04 01 13     2.969    3.497  113.2   15.5   113   12.9 
2025-07-03 00:00 UT   14 17 49.1   -04 01 56     2.983    3.497  112.3   15.6   113   12.9 
2025-07-04 00:00 UT   14 17 56.2   -04 02 46     2.996    3.497  111.4   15.7   113   12.9 
2025-07-05 00:00 UT   14 18 04.4   -04 03 43     3.009    3.497  110.5   15.8   113   12.9 
2025-07-06 00:00 UT   14 18 13.5   -04 04 46     3.023    3.497  109.6   15.9   113   12.9 
2025-07-07 00:00 UT   14 18 23.7   -04 05 56     3.036    3.497  108.7   16.0   112   13.0 
2025-07-08 00:00 UT   14 18 35.0   -04 07 11     3.050    3.497  107.8   16.1   112   13.0 
2025-07-09 00:00 UT   14 18 47.2   -04 08 33     3.063    3.497  106.9   16.2   112   13.0 
2025-07-10 00:00 UT   14 19 00.4   -04 10 01     3.077    3.497  106.0   16.2   112   13.0 
2025-07-11 00:00 UT   14 19 14.6   -04 11 34     3.091    3.497  105.1   16.3   112   13.0 
2025-07-12 00:00 UT   14 19 29.8   -04 13 13     3.104    3.497  104.3   16.4   112   13.0 
2025-07-13 00:00 UT   14 19 45.9   -04 14 58     3.118    3.497  103.4   16.4   111   13.0 

    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.