(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Aug 2025	13.3	3.494 AU	3.542 AU	14h34m	-05°43'	79.1°	16.5°
Opposition	6 Jul 2026	11.9	3.327 AU	2.361 AU	18h53m	-01°06'	158.3°	6.5°

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)              : 3.1553341
            i (Inclination)                 : 15.23285
            Ω (Longitude of ascending node) : 198.89907
            ω (Argument of perihelion)      : 210.95166
            M (Mean anomaly)                : 170.04703
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 228.95457
            B (Latitude of perihelion)      : -7.76627
            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
2025-08-12 00:00 UT   14 34 43.9   -05 43 07     3.542    3.494   79.1   16.5   107   13.3 
2025-08-12 20:56 UT   14 35 20.8   -05 46 28     3.554    3.494   78.4   16.5   106   13.3 
2025-08-13 00:00 UT   14 35 26.2   -05 46 58     3.556    3.494   78.3   16.5   106   13.3 
2025-08-14 00:00 UT   14 36 09.2   -05 50 51     3.569    3.494   77.6   16.4   106   13.3 
2025-08-15 00:00 UT   14 36 52.8   -05 54 47     3.583    3.494   76.8   16.4   106   13.3 
2025-08-16 00:00 UT   14 37 37.1   -05 58 45     3.597    3.494   76.1   16.3   106   13.3 
2025-08-17 00:00 UT   14 38 22.2   -06 02 45     3.611    3.494   75.3   16.3   106   13.3 
2025-08-18 00:00 UT   14 39 07.8   -06 06 47     3.624    3.494   74.6   16.2   106   13.3 
2025-08-19 00:00 UT   14 39 54.2   -06 10 52     3.638    3.494   73.8   16.2   105   13.3 
2025-08-20 00:00 UT   14 40 41.2   -06 14 59     3.651    3.493   73.1   16.1   105   13.3 
2025-08-21 00:00 UT   14 41 28.9   -06 19 07     3.665    3.493   72.3   16.0   105   13.3 
2025-08-22 00:00 UT   14 42 17.2   -06 23 17     3.678    3.493   71.6   15.9   105   13.4 
2025-08-23 00:00 UT   14 43 06.2   -06 27 29     3.692    3.493   70.8   15.9   105   13.4 
2025-08-24 00:00 UT   14 43 55.8   -06 31 43     3.705    3.493   70.1   15.8   104   13.4 
2025-08-25 00:00 UT   14 44 46.0   -06 35 59     3.718    3.493   69.4   15.7   104   13.4 
2025-08-26 00:00 UT   14 45 36.8   -06 40 15     3.731    3.493   68.7   15.6   104   13.4 
2025-08-27 00:00 UT   14 46 28.2   -06 44 34     3.744    3.492   67.9   15.6   104   13.4 
2025-08-28 00:00 UT   14 47 20.3   -06 48 53     3.757    3.492   67.2   15.5   104   13.4 
2025-08-29 00:00 UT   14 48 12.9   -06 53 14     3.770    3.492   66.5   15.4   103   13.4 
2025-08-30 00:00 UT   14 49 06.1   -06 57 36     3.783    3.492   65.8   15.3   103   13.4 
2025-08-31 00:00 UT   14 49 59.9   -07 01 59     3.796    3.492   65.0   15.2   103   13.4 
2025-09-01 00:00 UT   14 50 54.2   -07 06 23     3.809    3.492   64.3   15.1   103   13.4 
2025-09-02 00:00 UT   14 51 49.1   -07 10 48     3.821    3.492   63.6   15.0   103   13.4 
2025-09-03 00:00 UT   14 52 44.6   -07 15 13     3.834    3.491   62.9   14.9   102   13.4 
2025-09-04 00:00 UT   14 53 40.6   -07 19 40     3.846    3.491   62.2   14.8   102   13.4 
2025-09-05 00:00 UT   14 54 37.1   -07 24 07     3.858    3.491   61.5   14.7   102   13.4 
2025-09-06 00:00 UT   14 55 34.2   -07 28 35     3.871    3.491   60.8   14.6   102   13.4 
2025-09-07 00:00 UT   14 56 31.7   -07 33 03     3.883    3.491   60.1   14.5   102   13.4 
2025-09-08 00:00 UT   14 57 29.9   -07 37 32     3.895    3.490   59.3   14.4   101   13.4 
2025-09-09 00:00 UT   14 58 28.5   -07 42 01     3.907    3.490   58.6   14.3   101   13.4 
2025-09-10 00:00 UT   14 59 27.6   -07 46 30     3.919    3.490   57.9   14.2   101   13.4 
2025-09-11 00:00 UT   15 00 27.2   -07 51 00     3.930    3.490   57.2   14.0   101   13.4 

    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.