(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Jul 2025	13.0	3.497 AU	3.146 AU	14h20m	-04°18'	101.7°	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)      : 210.95165
            M (Mean anomaly)                : 170.04704
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 228.95456
            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
2025-07-15 00:00 UT   14 20 21.1   -04 18 45     3.146    3.497  101.7   16.5   111   13.0 
2025-07-15 22:27 UT   14 20 38.9   -04 20 38     3.159    3.496  100.9   16.6   111   13.1 
2025-07-16 00:00 UT   14 20 40.1   -04 20 46     3.160    3.496  100.8   16.6   111   13.1 
2025-07-17 00:00 UT   14 21 00.1   -04 22 53     3.174    3.496  100.0   16.6   111   13.1 
2025-07-18 00:00 UT   14 21 21.0   -04 25 05     3.188    3.496   99.1   16.7   111   13.1 
2025-07-19 00:00 UT   14 21 42.9   -04 27 22     3.202    3.496   98.3   16.7   110   13.1 
2025-07-20 00:00 UT   14 22 05.6   -04 29 43     3.216    3.496   97.4   16.7   110   13.1 
2025-07-21 00:00 UT   14 22 29.3   -04 32 10     3.230    3.496   96.6   16.8   110   13.1 
2025-07-22 00:00 UT   14 22 53.9   -04 34 42     3.245    3.496   95.8   16.8   110   13.1 
2025-07-23 00:00 UT   14 23 19.3   -04 37 18     3.259    3.496   94.9   16.8   110   13.1 
2025-07-24 00:00 UT   14 23 45.7   -04 39 59     3.273    3.496   94.1   16.8   110   13.1 
2025-07-25 00:00 UT   14 24 13.0   -04 42 45     3.287    3.496   93.3   16.9   110   13.1 
2025-07-26 00:00 UT   14 24 41.1   -04 45 34     3.301    3.496   92.5   16.9   109   13.2 
2025-07-27 00:00 UT   14 25 10.1   -04 48 28     3.316    3.496   91.7   16.9   109   13.2 
2025-07-28 00:00 UT   14 25 39.9   -04 51 27     3.330    3.496   90.9   16.9   109   13.2 
2025-07-29 00:00 UT   14 26 10.6   -04 54 29     3.344    3.496   90.0   16.9   109   13.2 
2025-07-30 00:00 UT   14 26 42.2   -04 57 35     3.358    3.496   89.2   16.9   109   13.2 
2025-07-31 00:00 UT   14 27 14.6   -05 00 45     3.373    3.496   88.4   16.9   109   13.2 
2025-08-01 00:00 UT   14 27 47.7   -05 03 59     3.387    3.495   87.6   16.9   108   13.2 
2025-08-02 00:00 UT   14 28 21.7   -05 07 16     3.401    3.495   86.9   16.9   108   13.2 
2025-08-03 00:00 UT   14 28 56.5   -05 10 37     3.415    3.495   86.1   16.8   108   13.2 
2025-08-04 00:00 UT   14 29 32.1   -05 14 02     3.429    3.495   85.3   16.8   108   13.2 
2025-08-05 00:00 UT   14 30 08.5   -05 17 29     3.443    3.495   84.5   16.8   108   13.2 
2025-08-06 00:00 UT   14 30 45.6   -05 21 00     3.458    3.495   83.7   16.8   108   13.3 
2025-08-07 00:00 UT   14 31 23.5   -05 24 34     3.472    3.495   82.9   16.7   107   13.3 
2025-08-08 00:00 UT   14 32 02.1   -05 28 11     3.486    3.495   82.2   16.7   107   13.3 
2025-08-09 00:00 UT   14 32 41.5   -05 31 51     3.500    3.495   81.4   16.7   107   13.3 
2025-08-10 00:00 UT   14 33 21.6   -05 35 34     3.514    3.495   80.6   16.6   107   13.3 
2025-08-11 00:00 UT   14 34 02.4   -05 39 19     3.528    3.495   79.9   16.6   107   13.3 
2025-08-12 00:00 UT   14 34 43.9   -05 43 07     3.542    3.494   79.1   16.5   107   13.3 
2025-08-13 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 

    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.