(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Jan 2026	13.4	3.443 AU	4.208 AU	17h50m	-12°39'	34.5°	9.3°
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) : 198.89334
            ω (Argument of perihelion)      : 210.98859
            M (Mean anomaly)                : 205.17127
            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
2026-01-21 00:00 UT   17 50 11.3   -12 39 05     4.208    3.443   34.5    9.3   287   13.4 
2026-01-21 08:23 UT   17 50 38.8   -12 38 26     4.205    3.443   34.8    9.4   287   13.4 
2026-01-22 00:00 UT   17 51 29.9   -12 37 12     4.200    3.443   35.2    9.5   287   13.4 
2026-01-23 00:00 UT   17 52 48.3   -12 35 15     4.191    3.442   35.9    9.6   286   13.4 
2026-01-24 00:00 UT   17 54 06.3   -12 33 14     4.182    3.442   36.5    9.8   286   13.4 
2026-01-25 00:00 UT   17 55 24.1   -12 31 09     4.173    3.441   37.2   10.0   285   13.4 
2026-01-26 00:00 UT   17 56 41.6   -12 28 59     4.164    3.441   37.9   10.1   285   13.4 
2026-01-27 00:00 UT   17 57 58.9   -12 26 45     4.155    3.440   38.6   10.3   284   13.4 
2026-01-28 00:00 UT   17 59 15.8   -12 24 27     4.146    3.439   39.2   10.4   284   13.4 
2026-01-29 00:00 UT   18 00 32.5   -12 22 05     4.136    3.439   39.9   10.6   283   13.4 
2026-01-30 00:00 UT   18 01 48.8   -12 19 38     4.126    3.438   40.6   10.7   283   13.4 
2026-01-31 00:00 UT   18 03 04.8   -12 17 07     4.117    3.438   41.3   10.9   283   13.4 
2026-02-01 00:00 UT   18 04 20.6   -12 14 32     4.107    3.437   41.9   11.0   282   13.4 
2026-02-02 00:00 UT   18 05 36.0   -12 11 53     4.097    3.437   42.6   11.2   282   13.4 
2026-02-03 00:00 UT   18 06 51.0   -12 09 10     4.086    3.436   43.3   11.3   282   13.4 
2026-02-04 00:00 UT   18 08 05.8   -12 06 23     4.076    3.436   44.0   11.5   281   13.4 
2026-02-05 00:00 UT   18 09 20.2   -12 03 31     4.066    3.435   44.7   11.6   281   13.4 
2026-02-06 00:00 UT   18 10 34.2   -12 00 35     4.055    3.435   45.3   11.8   280   13.4 
2026-02-07 00:00 UT   18 11 47.9   -11 57 36     4.045    3.434   46.0   11.9   280   13.4 
2026-02-08 00:00 UT   18 13 01.3   -11 54 32     4.034    3.433   46.7   12.1   280   13.4 
2026-02-09 00:00 UT   18 14 14.2   -11 51 24     4.023    3.433   47.4   12.2   279   13.4 
2026-02-10 00:00 UT   18 15 26.8   -11 48 12     4.012    3.432   48.1   12.4   279   13.4 
2026-02-11 00:00 UT   18 16 39.0   -11 44 56     4.001    3.432   48.8   12.5   279   13.4 
2026-02-12 00:00 UT   18 17 50.8   -11 41 37     3.989    3.431   49.5   12.6   278   13.4 
2026-02-13 00:00 UT   18 19 02.1   -11 38 13     3.978    3.431   50.2   12.8   278   13.4 
2026-02-14 00:00 UT   18 20 13.1   -11 34 45     3.967    3.430   50.9   12.9   278   13.4 
2026-02-15 00:00 UT   18 21 23.7   -11 31 13     3.955    3.430   51.6   13.0   277   13.4 
2026-02-16 00:00 UT   18 22 33.8   -11 27 38     3.943    3.429   52.3   13.2   277   13.4 
2026-02-17 00:00 UT   18 23 43.4   -11 23 58     3.931    3.428   53.0   13.3   277   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.