(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	6 Jul 2026	11.9	3.327 AU	2.361 AU	18h53m	-01°06'	158.3°	6.5°
Today	2 Sep 2026	12.5	3.276 AU	2.695 AU	18h28m	-04°42'	116.7°	16.0°

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)                : 0.1078667
            a (Semimajor axis)              : 3.1561838
            i (Inclination)                 : 15.22990
            Ω (Longitude of ascending node) : 198.88392
            ω (Argument of perihelion)      : 210.99225
            M (Mean anomaly)                : 240.32299
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 228.97966
            B (Latitude of perihelion)      : -7.77402
            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
2026-09-02 00:00 UT   18 28 34.4   -04 42 11     2.695    3.276  116.7   16.0    97   12.5 
2026-09-02 15:52 UT   18 28 38.0   -04 45 38     2.703    3.275  116.2   16.1    96   12.5 
2026-09-03 00:00 UT   18 28 40.1   -04 47 24     2.706    3.275  115.9   16.1    96   12.5 
2026-09-04 00:00 UT   18 28 47.0   -04 52 37     2.717    3.274  115.0   16.2    96   12.6 
2026-09-05 00:00 UT   18 28 55.2   -04 57 50     2.729    3.273  114.1   16.3    95   12.6 
2026-09-06 00:00 UT   18 29 04.5   -05 03 01     2.740    3.272  113.3   16.4    95   12.6 
2026-09-07 00:00 UT   18 29 15.2   -05 08 12     2.751    3.271  112.4   16.6    95   12.6 
2026-09-08 00:00 UT   18 29 27.0   -05 13 22     2.763    3.270  111.5   16.7    94   12.6 
2026-09-09 00:00 UT   18 29 40.0   -05 18 31     2.774    3.269  110.7   16.8    94   12.6 
2026-09-10 00:00 UT   18 29 54.3   -05 23 39     2.786    3.268  109.8   16.9    94   12.6 
2026-09-11 00:00 UT   18 30 09.7   -05 28 45     2.798    3.267  109.0   16.9    93   12.6 
2026-09-12 00:00 UT   18 30 26.4   -05 33 50     2.810    3.266  108.1   17.0    93   12.7 
2026-09-13 00:00 UT   18 30 44.2   -05 38 53     2.822    3.265  107.3   17.1    92   12.7 
2026-09-14 00:00 UT   18 31 03.3   -05 43 55     2.834    3.264  106.4   17.2    92   12.7 
2026-09-15 00:00 UT   18 31 23.5   -05 48 54     2.846    3.263  105.6   17.3    92   12.7 
2026-09-16 00:00 UT   18 31 44.8   -05 53 52     2.858    3.262  104.8   17.3    91   12.7 
2026-09-17 00:00 UT   18 32 07.4   -05 58 47     2.870    3.261  103.9   17.4    91   12.7 
2026-09-18 00:00 UT   18 32 31.0   -06 03 41     2.882    3.260  103.1   17.5    91   12.7 
2026-09-19 00:00 UT   18 32 55.8   -06 08 31     2.894    3.259  102.3   17.5    90   12.7 
2026-09-20 00:00 UT   18 33 21.7   -06 13 20     2.907    3.258  101.4   17.6    90   12.7 
2026-09-21 00:00 UT   18 33 48.8   -06 18 06     2.919    3.257  100.6   17.6    90   12.8 
2026-09-22 00:00 UT   18 34 16.9   -06 22 49     2.932    3.256   99.8   17.7    89   12.8 
2026-09-23 00:00 UT   18 34 46.1   -06 27 29     2.944    3.255   99.0   17.7    89   12.8 
2026-09-24 00:00 UT   18 35 16.4   -06 32 07     2.957    3.255   98.2   17.8    89   12.8 
2026-09-25 00:00 UT   18 35 47.8   -06 36 42     2.969    3.254   97.4   17.8    89   12.8 
2026-09-26 00:00 UT   18 36 20.2   -06 41 14     2.982    3.253   96.6   17.8    88   12.8 
2026-09-27 00:00 UT   18 36 53.6   -06 45 43     2.994    3.252   95.8   17.9    88   12.8 
2026-09-28 00:00 UT   18 37 28.1   -06 50 09     3.007    3.251   95.0   17.9    88   12.8 
2026-09-29 00:00 UT   18 38 03.6   -06 54 31     3.019    3.250   94.2   17.9    87   12.8 
2026-09-30 00:00 UT   18 38 40.1   -06 58 50     3.032    3.249   93.4   17.9    87   12.8 
2026-10-01 00:00 UT   18 39 17.7   -07 03 06     3.045    3.248   92.6   17.9    87   12.8 
2026-10-02 00:00 UT   18 39 56.2   -07 07 19     3.058    3.247   91.8   17.9    86   12.9 

    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.