(121) Hermione
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Nov 2026	13.8	3.416 AU	4.136 AU	17h49m	-26°04'	38.4°	10.4°
Opposition	19 Aug 2027	11.8	3.123 AU	2.123 AU	22h09m	-22°48'	169.3°	3.5°

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 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)                : 258.70793
            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
2026-11-12 00:00 UT   17 49 20.2   -26 04 49     4.136    3.416   38.4   10.4    94   13.8 
2026-11-12 20:42 UT   17 50 32.5   -26 05 35     4.143    3.415   37.8   10.2    94   13.8 
2026-11-13 00:00 UT   17 50 44.1   -26 05 42     4.144    3.415   37.8   10.2    94   13.8 
2026-11-14 00:00 UT   17 52 08.4   -26 06 33     4.151    3.414   37.1   10.1    94   13.8 
2026-11-15 00:00 UT   17 53 33.0   -26 07 21     4.159    3.413   36.4    9.9    94   13.8 
2026-11-16 00:00 UT   17 54 58.0   -26 08 07     4.166    3.412   35.7    9.7    94   13.8 
2026-11-17 00:00 UT   17 56 23.3   -26 08 50     4.173    3.411   35.0    9.6    94   13.8 
2026-11-18 00:00 UT   17 57 49.0   -26 09 31     4.180    3.409   34.3    9.4    94   13.8 
2026-11-19 00:00 UT   17 59 15.0   -26 10 08     4.187    3.408   33.6    9.2    94   13.8 
2026-11-20 00:00 UT   18 00 41.3   -26 10 43     4.194    3.407   33.0    9.1    94   13.8 
2026-11-21 00:00 UT   18 02 08.0   -26 11 16     4.200    3.406   32.3    8.9    94   13.8 
2026-11-22 00:00 UT   18 03 35.0   -26 11 45     4.207    3.405   31.6    8.7    94   13.8 
2026-11-23 00:00 UT   18 05 02.3   -26 12 12     4.213    3.404   30.9    8.6    94   13.8 
2026-11-24 00:00 UT   18 06 29.8   -26 12 35     4.219    3.402   30.2    8.4    94   13.8 
2026-11-25 00:00 UT   18 07 57.7   -26 12 56     4.225    3.401   29.6    8.2    94   13.8 
2026-11-26 00:00 UT   18 09 25.9   -26 13 14     4.231    3.400   28.9    8.1    94   13.7 
2026-11-27 00:00 UT   18 10 54.3   -26 13 29     4.236    3.399   28.2    7.9    94   13.7 
2026-11-28 00:00 UT   18 12 23.0   -26 13 42     4.242    3.398   27.5    7.7    94   13.7 
2026-11-29 00:00 UT   18 13 52.0   -26 13 51     4.247    3.397   26.9    7.5    94   13.7 
2026-11-30 00:00 UT   18 15 21.3   -26 13 57     4.253    3.395   26.2    7.4    94   13.7 
2026-12-01 00:00 UT   18 16 50.8   -26 14 00     4.258    3.394   25.5    7.2    94   13.7 
2026-12-02 00:00 UT   18 18 20.6   -26 14 01     4.263    3.393   24.8    7.0    94   13.7 
2026-12-03 00:00 UT   18 19 50.6   -26 13 58     4.267    3.392   24.2    6.8    94   13.7 
2026-12-04 00:00 UT   18 21 20.9   -26 13 52     4.272    3.391   23.5    6.7    95   13.7 
2026-12-05 00:00 UT   18 22 51.4   -26 13 43     4.276    3.390   22.8    6.5    95   13.7 
2026-12-06 00:00 UT   18 24 22.1   -26 13 31     4.281    3.389   22.2    6.3    95   13.7 
2026-12-07 00:00 UT   18 25 53.1   -26 13 16     4.285    3.387   21.5    6.1    95   13.7 

    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.