(121) Hermione
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Feb 2026	13.9	3.691 AU	3.691 AU	17h03m	-21°15'	82.3°	15.4°
Opposition	5 Jun 2026	12.3	3.595 AU	2.580 AU	16h52m	-22°51'	179.7°	0.1°

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)                : 0.1246355
            a (Semimajor axis)              : 3.4569989
            i (Inclination)                 : 7.56630
            Ω (Longitude of ascending node) : 72.87519
            ω (Argument of perihelion)      : 297.01608
            M (Mean anomaly)                : 227.97435
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 10.09455
            B (Latitude of perihelion)      : -6.73659
            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
2026-02-28 00:00 UT   17 03 04.5   -21 15 47     3.691    3.691   82.3   15.4   276   13.9 
2026-02-28 12:14 UT   17 03 26.6   -21 16 37     3.683    3.690   82.7   15.4   276   13.9 
2026-03-01 00:00 UT   17 03 47.6   -21 17 26     3.675    3.690   83.1   15.5   276   13.9 
2026-03-02 00:00 UT   17 04 30.0   -21 19 04     3.659    3.689   84.0   15.5   276   13.9 
2026-03-03 00:00 UT   17 05 11.6   -21 20 40     3.643    3.688   84.8   15.5   276   13.9 
2026-03-04 00:00 UT   17 05 52.3   -21 22 15     3.627    3.687   85.6   15.6   275   13.9 
2026-03-05 00:00 UT   17 06 32.3   -21 23 49     3.612    3.686   86.5   15.6   275   13.9 
2026-03-06 00:00 UT   17 07 11.4   -21 25 21     3.596    3.685   87.3   15.6   275   13.9 
2026-03-07 00:00 UT   17 07 49.7   -21 26 52     3.580    3.684   88.2   15.6   275   13.9 
2026-03-08 00:00 UT   17 08 27.1   -21 28 22     3.564    3.683   89.0   15.6   275   13.8 
2026-03-09 00:00 UT   17 09 03.6   -21 29 50     3.548    3.682   89.9   15.6   275   13.8 
2026-03-10 00:00 UT   17 09 39.3   -21 31 17     3.532    3.682   90.8   15.6   275   13.8 
2026-03-11 00:00 UT   17 10 14.1   -21 32 44     3.516    3.681   91.6   15.6   275   13.8 
2026-03-12 00:00 UT   17 10 47.9   -21 34 09     3.500    3.680   92.5   15.6   275   13.8 
2026-03-13 00:00 UT   17 11 20.9   -21 35 32     3.484    3.679   93.4   15.6   275   13.8 
2026-03-14 00:00 UT   17 11 52.9   -21 36 55     3.468    3.678   94.2   15.6   275   13.8 
2026-03-15 00:00 UT   17 12 23.9   -21 38 17     3.453    3.677   95.1   15.6   275   13.8 
2026-03-16 00:00 UT   17 12 54.0   -21 39 38     3.437    3.676   96.0   15.6   275   13.8 
2026-03-17 00:00 UT   17 13 23.1   -21 40 57     3.421    3.675   96.9   15.6   274   13.8 
2026-03-18 00:00 UT   17 13 51.3   -21 42 16     3.405    3.674   97.7   15.6   274   13.7 
2026-03-19 00:00 UT   17 14 18.4   -21 43 34     3.389    3.673   98.6   15.5   274   13.7 
2026-03-20 00:00 UT   17 14 44.5   -21 44 51     3.374    3.672   99.5   15.5   274   13.7 
2026-03-21 00:00 UT   17 15 09.6   -21 46 07     3.358    3.671  100.4   15.5   274   13.7 
2026-03-22 00:00 UT   17 15 33.7   -21 47 23     3.342    3.670  101.3   15.4   274   13.7 
2026-03-23 00:00 UT   17 15 56.7   -21 48 37     3.327    3.669  102.2   15.4   274   13.7 
2026-03-24 00:00 UT   17 16 18.6   -21 49 51     3.311    3.668  103.1   15.3   274   13.7 
2026-03-25 00:00 UT   17 16 39.5   -21 51 04     3.296    3.667  104.0   15.3   274   13.7 
2026-03-26 00:00 UT   17 16 59.3   -21 52 16     3.280    3.667  104.9   15.2   274   13.6 
2026-03-27 00:00 UT   17 17 18.1   -21 53 28     3.265    3.666  105.9   15.2   274   13.6 
2026-03-28 00:00 UT   17 17 35.7   -21 54 39     3.250    3.665  106.8   15.1   274   13.6 
2026-03-29 00:00 UT   17 17 52.3   -21 55 50     3.234    3.664  107.7   15.0   274   13.6 
2026-03-30 00:00 UT   17 18 07.8   -21 56 60     3.219    3.663  108.6   15.0   274   13.6 

    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.