(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	11 May 2026	12.6	3.373 AU	2.786 AU	19h19m	-03°57'	117.4°	15.4°
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)      : 210.98858
            M (Mean anomaly)                : 205.17127
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 228.98535
            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
2026-05-11 00:00 UT   19 19 46.6   -03 57 42     2.786    3.373  117.4   15.4   252   12.6 
2026-05-11 04:48 UT   19 19 46.7   -03 56 35     2.784    3.373  117.6   15.4   252   12.6 
2026-05-12 00:00 UT   19 19 46.9   -03 52 06     2.774    3.372  118.3   15.3   252   12.6 
2026-05-13 00:00 UT   19 19 46.1   -03 46 33     2.761    3.371  119.2   15.2   251   12.6 
2026-05-14 00:00 UT   19 19 44.1   -03 41 03     2.749    3.371  120.1   15.0   251   12.6 
2026-05-15 00:00 UT   19 19 40.9   -03 35 35     2.737    3.370  121.0   14.9   250   12.6 
2026-05-16 00:00 UT   19 19 36.5   -03 30 12     2.724    3.369  121.8   14.8   250   12.6 
2026-05-17 00:00 UT   19 19 30.9   -03 24 51     2.712    3.368  122.7   14.6   249   12.6 
2026-05-18 00:00 UT   19 19 24.2   -03 19 34     2.701    3.368  123.6   14.5   249   12.5 
2026-05-19 00:00 UT   19 19 16.3   -03 14 21     2.689    3.367  124.5   14.3   248   12.5 
2026-05-20 00:00 UT   19 19 07.1   -03 09 12     2.677    3.366  125.4   14.2   248   12.5 
2026-05-21 00:00 UT   19 18 56.9   -03 04 07     2.666    3.365  126.3   14.0   247   12.5 
2026-05-22 00:00 UT   19 18 45.4   -02 59 06     2.655    3.364  127.2   13.9   247   12.5 
2026-05-23 00:00 UT   19 18 32.8   -02 54 10     2.644    3.364  128.1   13.7   246   12.5 
2026-05-24 00:00 UT   19 18 19.0   -02 49 18     2.633    3.363  128.9   13.5   246   12.4 
2026-05-25 00:00 UT   19 18 04.1   -02 44 31     2.622    3.362  129.8   13.4   245   12.4 
2026-05-26 00:00 UT   19 17 48.0   -02 39 49     2.612    3.361  130.7   13.2   244   12.4 
2026-05-27 00:00 UT   19 17 30.8   -02 35 11     2.601    3.361  131.6   13.0   244   12.4 
2026-05-28 00:00 UT   19 17 12.5   -02 30 39     2.591    3.360  132.5   12.8   243   12.4 
2026-05-29 00:00 UT   19 16 53.0   -02 26 13     2.581    3.359  133.4   12.7   242   12.4 
2026-05-30 00:00 UT   19 16 32.5   -02 21 51     2.571    3.358  134.3   12.5   242   12.4 
2026-05-31 00:00 UT   19 16 10.9   -02 17 36     2.561    3.357  135.2   12.3   241   12.3 
2026-06-01 00:00 UT   19 15 48.1   -02 13 26     2.552    3.357  136.1   12.1   240   12.3 
2026-06-02 00:00 UT   19 15 24.3   -02 09 22     2.543    3.356  137.0   11.9   239   12.3 
2026-06-03 00:00 UT   19 14 59.5   -02 05 24     2.533    3.355  137.8   11.7   238   12.3 
2026-06-04 00:00 UT   19 14 33.6   -02 01 33     2.525    3.354  138.7   11.5   238   12.3 
2026-06-05 00:00 UT   19 14 06.6   -01 57 48     2.516    3.353  139.6   11.3   237   12.3 
2026-06-06 00:00 UT   19 13 38.7   -01 54 09     2.507    3.353  140.5   11.1   236   12.2 
2026-06-07 00:00 UT   19 13 09.7   -01 50 37     2.499    3.352  141.3   10.9   235   12.2 
2026-06-08 00:00 UT   19 12 39.8   -01 47 12     2.491    3.351  142.2   10.7   234   12.2 
2026-06-09 00:00 UT   19 12 08.9   -01 43 55     2.483    3.350  143.0   10.5   233   12.2 
2026-06-10 00:00 UT   19 11 37.1   -01 40 44     2.475    3.349  143.9   10.3   232   12.2 

    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.