(57) Mnemosyne
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Jun 2026	12.2	3.349 AU	2.475 AU	19h11m	-01°40'	143.9°	10.3°
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)      : 210.98858
            M (Mean anomaly)                : 205.17128
            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
2026-06-10 00:00 UT   19 11 37.1   -01 40 44     2.475    3.349  143.9   10.3   232   12.2 
2026-06-10 07:22 UT   19 11 27.1   -01 39 47     2.473    3.349  144.1   10.2   231   12.2 
2026-06-11 00:00 UT   19 11 04.3   -01 37 41     2.468    3.349  144.7   10.1   230   12.2 
2026-06-12 00:00 UT   19 10 30.7   -01 34 45     2.461    3.348  145.5    9.9   229   12.2 
2026-06-13 00:00 UT   19 09 56.1   -01 31 57     2.454    3.347  146.4    9.7   228   12.1 
2026-06-14 00:00 UT   19 09 20.8   -01 29 17     2.447    3.346  147.2    9.5   227   12.1 
2026-06-15 00:00 UT   19 08 44.6   -01 26 45     2.441    3.345  148.0    9.3   225   12.1 
2026-06-16 00:00 UT   19 08 07.6   -01 24 20     2.434    3.344  148.7    9.1   224   12.1 
2026-06-17 00:00 UT   19 07 29.9   -01 22 04     2.428    3.344  149.5    8.9   222   12.1 
2026-06-18 00:00 UT   19 06 51.4   -01 19 57     2.423    3.343  150.2    8.7   221   12.1 
2026-06-19 00:00 UT   19 06 12.3   -01 17 57     2.417    3.342  151.0    8.5   219   12.1 
2026-06-20 00:00 UT   19 05 32.5   -01 16 06     2.412    3.341  151.7    8.3   217   12.0 
2026-06-21 00:00 UT   19 04 52.1   -01 14 24     2.407    3.340  152.4    8.1   215   12.0 
2026-06-22 00:00 UT   19 04 11.1   -01 12 50     2.402    3.339  153.0    7.9   213   12.0 
2026-06-23 00:00 UT   19 03 29.6   -01 11 25     2.397    3.339  153.7    7.8   211   12.0 
2026-06-24 00:00 UT   19 02 47.5   -01 10 09     2.393    3.338  154.3    7.6   209   12.0 
2026-06-25 00:00 UT   19 02 05.0   -01 09 01     2.389    3.337  154.8    7.4   207   12.0 
2026-06-26 00:00 UT   19 01 22.0   -01 08 02     2.385    3.336  155.4    7.3   205   12.0 
2026-06-27 00:00 UT   19 00 38.6   -01 07 13     2.382    3.335  155.9    7.2   202   12.0 
2026-06-28 00:00 UT   18 59 54.9   -01 06 32     2.378    3.334  156.3    7.0   200   11.9 
2026-06-29 00:00 UT   18 59 10.8   -01 05 59     2.375    3.334  156.8    6.9   197   11.9 
2026-06-30 00:00 UT   18 58 26.4   -01 05 36     2.373    3.333  157.1    6.8   194   11.9 
2026-07-01 00:00 UT   18 57 41.8   -01 05 22     2.370    3.332  157.5    6.7   192   11.9 
2026-07-02 00:00 UT   18 56 57.0   -01 05 17     2.368    3.331  157.7    6.6   189   11.9 
2026-07-03 00:00 UT   18 56 12.0   -01 05 21     2.366    3.330  158.0    6.6   186   11.9 
2026-07-04 00:00 UT   18 55 26.8   -01 05 33     2.364    3.329  158.1    6.5   183   11.9 
2026-07-05 00:00 UT   18 54 41.6   -01 05 55     2.363    3.328  158.3    6.5   180   11.9 
2026-07-06 00:00 UT   18 53 56.3   -01 06 26     2.362    3.328  158.3    6.5   177   11.9 
2026-07-07 00:00 UT   18 53 11.0   -01 07 05     2.361    3.327  158.3    6.5   174   11.9 
2026-07-08 00:00 UT   18 52 25.7   -01 07 54     2.360    3.326  158.3    6.5   171   11.9 
2026-07-09 00:00 UT   18 51 40.5   -01 08 51     2.360    3.325  158.2    6.5   168   11.9 
2026-07-10 00:00 UT   18 50 55.4   -01 09 58     2.360    3.324  158.0    6.6   165   11.9 

    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.