(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	24 Jun 2026	12.0	3.338 AU	2.393 AU	19h02m	-01°10'	154.3°	7.6°
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)                : 0.1078667
            a (Semimajor axis)              : 3.1561838
            i (Inclination)                 : 15.22990
            Ω (Longitude of ascending node) : 198.88393
            ω (Argument of perihelion)      : 210.99223
            M (Mean anomaly)                : 240.32301
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 228.97965
            B (Latitude of perihelion)      : -7.77401
            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
2026-06-24 00:00 UT   19 02 47.7   -01 10 14     2.393    3.338  154.3    7.6   209   12.0 
2026-06-24 12:27 UT   19 02 25.7   -01 09 38     2.391    3.337  154.6    7.5   208   12.0 
2026-06-25 00:00 UT   19 02 05.2   -01 09 06     2.389    3.337  154.8    7.4   207   12.0 
2026-06-26 00:00 UT   19 01 22.2   -01 08 07     2.385    3.336  155.4    7.3   205   12.0 
2026-06-27 00:00 UT   19 00 38.8   -01 07 18     2.382    3.335  155.9    7.2   202   12.0 
2026-06-28 00:00 UT   18 59 55.1   -01 06 37     2.379    3.335  156.3    7.0   200   12.0 
2026-06-29 00:00 UT   18 59 11.0   -01 06 05     2.376    3.334  156.8    6.9   197   11.9 
2026-06-30 00:00 UT   18 58 26.7   -01 05 41     2.373    3.333  157.1    6.8   194   11.9 
2026-07-01 00:00 UT   18 57 42.1   -01 05 27     2.370    3.332  157.5    6.7   192   11.9 
2026-07-02 00:00 UT   18 56 57.2   -01 05 22     2.368    3.331  157.7    6.6   189   11.9 
2026-07-03 00:00 UT   18 56 12.2   -01 05 26     2.366    3.330  158.0    6.6   186   11.9 
2026-07-04 00:00 UT   18 55 27.1   -01 05 39     2.364    3.329  158.1    6.5   183   11.9 
2026-07-05 00:00 UT   18 54 41.9   -01 06 01     2.363    3.329  158.3    6.5   180   11.9 
2026-07-06 00:00 UT   18 53 56.6   -01 06 31     2.362    3.328  158.3    6.5   177   11.9 
2026-07-07 00:00 UT   18 53 11.3   -01 07 11     2.361    3.327  158.3    6.5   174   11.9 
2026-07-08 00:00 UT   18 52 26.0   -01 07 60     2.360    3.326  158.3    6.5   171   11.9 
2026-07-09 00:00 UT   18 51 40.8   -01 08 57     2.360    3.325  158.2    6.5   168   11.9 
2026-07-10 00:00 UT   18 50 55.7   -01 10 03     2.360    3.324  158.0    6.6   165   11.9 
2026-07-11 00:00 UT   18 50 10.7   -01 11 18     2.360    3.323  157.8    6.6   162   11.9 
2026-07-12 00:00 UT   18 49 25.9   -01 12 42     2.360    3.323  157.6    6.7   159   11.9 
2026-07-13 00:00 UT   18 48 41.4   -01 14 15     2.361    3.322  157.3    6.8   156   11.9 
2026-07-14 00:00 UT   18 47 57.2   -01 15 56     2.362    3.321  156.9    6.9   153   11.9 
2026-07-15 00:00 UT   18 47 13.3   -01 17 45     2.363    3.320  156.5    7.0   151   11.9 
2026-07-16 00:00 UT   18 46 29.7   -01 19 43     2.365    3.319  156.0    7.1   148   11.9 
2026-07-17 00:00 UT   18 45 46.6   -01 21 49     2.366    3.318  155.5    7.3   146   11.9 
2026-07-18 00:00 UT   18 45 03.9   -01 24 03     2.368    3.317  155.0    7.4   143   12.0 
2026-07-19 00:00 UT   18 44 21.7   -01 26 25     2.371    3.317  154.5    7.6   141   12.0 
2026-07-20 00:00 UT   18 43 40.1   -01 28 54     2.373    3.316  153.9    7.8   139   12.0 
2026-07-21 00:00 UT   18 42 59.0   -01 31 31     2.376    3.315  153.2    7.9   137   12.0 
2026-07-22 00:00 UT   18 42 18.5   -01 34 16     2.379    3.314  152.6    8.1   135   12.0 
2026-07-23 00:00 UT   18 41 38.7   -01 37 08     2.382    3.313  151.9    8.3   133   12.0 
2026-07-24 00:00 UT   18 40 59.5   -01 40 07     2.386    3.312  151.2    8.5   131   12.0 

    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.