(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Feb 2026	13.4	3.427 AU	3.895 AU	18h27m	-11°12'	55.1°	13.7°
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)                : 0.1080406
            a (Semimajor axis)              : 3.1557907
            i (Inclination)                 : 15.23097
            Ω (Longitude of ascending node) : 198.89335
            ω (Argument of perihelion)      : 210.98858
            M (Mean anomaly)                : 205.17128
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 228.98536
            B (Latitude of perihelion)      : -7.77372
            P (Orbital period in years)     : 5.61            
        

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
2026-02-20 00:00 UT   18 27 09.7   -11 12 37     3.895    3.427   55.1   13.7   276   13.4 
2026-02-20 08:05 UT   18 27 32.6   -11 11 18     3.891    3.426   55.3   13.7   276   13.4 
2026-02-21 00:00 UT   18 28 17.5   -11 08 42     3.883    3.426   55.8   13.8   276   13.4 
2026-02-22 00:00 UT   18 29 24.9   -11 04 44     3.871    3.425   56.5   13.9   275   13.3 
2026-02-23 00:00 UT   18 30 31.7   -11 00 42     3.858    3.425   57.2   14.1   275   13.3 
2026-02-24 00:00 UT   18 31 38.0   -10 56 37     3.846    3.424   57.9   14.2   275   13.3 
2026-02-25 00:00 UT   18 32 43.8   -10 52 28     3.833    3.424   58.6   14.3   274   13.3 
2026-02-26 00:00 UT   18 33 49.1   -10 48 15     3.820    3.423   59.3   14.4   274   13.3 
2026-02-27 00:00 UT   18 34 53.9   -10 43 59     3.808    3.422   60.1   14.5   274   13.3 
2026-02-28 00:00 UT   18 35 58.2   -10 39 40     3.795    3.422   60.8   14.6   273   13.3 
2026-03-01 00:00 UT   18 37 01.9   -10 35 17     3.782    3.421   61.5   14.7   273   13.3 
2026-03-02 00:00 UT   18 38 05.1   -10 30 51     3.769    3.421   62.2   14.8   273   13.3 
2026-03-03 00:00 UT   18 39 07.7   -10 26 21     3.755    3.420   62.9   15.0   273   13.3 
2026-03-04 00:00 UT   18 40 09.7   -10 21 48     3.742    3.419   63.6   15.1   272   13.3 
2026-03-05 00:00 UT   18 41 11.2   -10 17 12     3.729    3.419   64.4   15.2   272   13.3 
2026-03-06 00:00 UT   18 42 12.1   -10 12 32     3.716    3.418   65.1   15.3   272   13.3 
2026-03-07 00:00 UT   18 43 12.4   -10 07 50     3.702    3.418   65.8   15.4   272   13.3 
2026-03-08 00:00 UT   18 44 12.2   -10 03 04     3.689    3.417   66.5   15.5   271   13.3 
2026-03-09 00:00 UT   18 45 11.3   -09 58 15     3.675    3.416   67.3   15.5   271   13.3 
2026-03-10 00:00 UT   18 46 09.8   -09 53 23     3.661    3.416   68.0   15.6   271   13.3 
2026-03-11 00:00 UT   18 47 07.7   -09 48 28     3.648    3.415   68.7   15.7   270   13.3 
2026-03-12 00:00 UT   18 48 04.9   -09 43 30     3.634    3.414   69.5   15.8   270   13.3 
2026-03-13 00:00 UT   18 49 01.5   -09 38 29     3.620    3.414   70.2   15.9   270   13.3 
2026-03-14 00:00 UT   18 49 57.5   -09 33 25     3.606    3.413   70.9   16.0   270   13.3 
2026-03-15 00:00 UT   18 50 52.8   -09 28 18     3.592    3.413   71.7   16.1   269   13.3 
2026-03-16 00:00 UT   18 51 47.4   -09 23 09     3.578    3.412   72.4   16.1   269   13.2 
2026-03-17 00:00 UT   18 52 41.3   -09 17 56     3.564    3.411   73.2   16.2   269   13.2 
2026-03-18 00:00 UT   18 53 34.5   -09 12 42     3.550    3.411   73.9   16.3   269   13.2 
2026-03-19 00:00 UT   18 54 27.0   -09 07 24     3.536    3.410   74.7   16.4   268   13.2 
2026-03-20 00:00 UT   18 55 18.8   -09 02 04     3.521    3.409   75.4   16.4   268   13.2 
2026-03-21 00:00 UT   18 56 09.9   -08 56 42     3.507    3.409   76.2   16.5   268   13.2 
2026-03-22 00:00 UT   18 57 00.2   -08 51 17     3.493    3.408   76.9   16.5   268   13.2 

    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.