(121) Hermione
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	5 Jun 2026	12.3	3.595 AU	2.580 AU	16h52m	-22°51'	179.7°	0.1°
Today	15 Jun 2026	12.5	3.585 AU	2.582 AU	16h45m	-22°53'	169.3°	3.0°

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 Hermione are:

            e (Eccentricity)                : 0.1244488
            a (Semimajor axis)              : 3.4577722
            i (Inclination)                 : 7.56551
            Ω (Longitude of ascending node) : 72.87631
            ω (Argument of perihelion)      : 296.93689
            M (Mean anomaly)                : 258.70794
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 10.01603
            B (Latitude of perihelion)      : -6.74065
            P (Orbital period in years)     : 6.43            
        

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
2026-06-15 00:00 UT   16 45 28.0   -22 53 46     2.582    3.585  169.3    3.0    94   12.5 
2026-06-15 16:58 UT   16 44 55.3   -22 53 53     2.583    3.584  168.5    3.2    94   12.5 
2026-06-16 00:00 UT   16 44 41.7   -22 53 56     2.584    3.584  168.2    3.3    95   12.5 
2026-06-17 00:00 UT   16 43 55.8   -22 54 05     2.586    3.583  167.0    3.6    95   12.6 
2026-06-18 00:00 UT   16 43 10.4   -22 54 13     2.588    3.582  165.9    4.0    95   12.6 
2026-06-19 00:00 UT   16 42 25.4   -22 54 21     2.590    3.581  164.8    4.3    95   12.6 
2026-06-20 00:00 UT   16 41 41.0   -22 54 29     2.593    3.580  163.7    4.6    95   12.6 
2026-06-21 00:00 UT   16 40 57.1   -22 54 37     2.596    3.579  162.5    4.9    95   12.6 
2026-06-22 00:00 UT   16 40 13.8   -22 54 45     2.600    3.577  161.4    5.2    96   12.7 
2026-06-23 00:00 UT   16 39 31.1   -22 54 53     2.603    3.576  160.3    5.5    96   12.7 
2026-06-24 00:00 UT   16 38 49.2   -22 55 00     2.607    3.575  159.2    5.8    96   12.7 
2026-06-25 00:00 UT   16 38 07.9   -22 55 08     2.611    3.574  158.1    6.1    96   12.7 
2026-06-26 00:00 UT   16 37 27.3   -22 55 16     2.616    3.573  157.0    6.4    96   12.7 
2026-06-27 00:00 UT   16 36 47.5   -22 55 24     2.620    3.572  155.9    6.7    96   12.7 
2026-06-28 00:00 UT   16 36 08.5   -22 55 33     2.625    3.571  154.8    7.0    96   12.8 
2026-06-29 00:00 UT   16 35 30.3   -22 55 42     2.630    3.570  153.7    7.3    96   12.8 
2026-06-30 00:00 UT   16 34 53.0   -22 55 51     2.636    3.569  152.6    7.5    97   12.8 
2026-07-01 00:00 UT   16 34 16.5   -22 56 01     2.641    3.568  151.5    7.8    97   12.8 
2026-07-02 00:00 UT   16 33 41.0   -22 56 12     2.647    3.567  150.4    8.1    97   12.8 
2026-07-03 00:00 UT   16 33 06.3   -22 56 23     2.653    3.566  149.3    8.4    97   12.8 
2026-07-04 00:00 UT   16 32 32.6   -22 56 36     2.660    3.565  148.2    8.6    97   12.9 
2026-07-05 00:00 UT   16 31 59.9   -22 56 49     2.666    3.563  147.2    8.9    97   12.9 
2026-07-06 00:00 UT   16 31 28.2   -22 57 02     2.673    3.562  146.1    9.2    97   12.9 
2026-07-07 00:00 UT   16 30 57.5   -22 57 17     2.680    3.561  145.0    9.4    97   12.9 
2026-07-08 00:00 UT   16 30 27.8   -22 57 33     2.688    3.560  143.9    9.7    97   12.9 
2026-07-09 00:00 UT   16 29 59.2   -22 57 51     2.695    3.559  142.9    9.9    97   12.9 
2026-07-10 00:00 UT   16 29 31.7   -22 58 09     2.703    3.558  141.8   10.2    97   13.0 
2026-07-11 00:00 UT   16 29 05.3   -22 58 29     2.711    3.557  140.8   10.4    97   13.0 
2026-07-12 00:00 UT   16 28 40.0   -22 58 50     2.719    3.556  139.7   10.7    97   13.0 
2026-07-13 00:00 UT   16 28 15.8   -22 59 12     2.727    3.555  138.7   10.9    98   13.0 
2026-07-14 00:00 UT   16 27 52.7   -22 59 36     2.736    3.554  137.6   11.1    98   13.0 
2026-07-15 00:00 UT   16 27 30.9   -23 00 01     2.745    3.553  136.6   11.3    98   13.0 

    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.