(346) Hermentaria
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	9 May 2025	12.8	3.040 AU	2.591 AU	10h44m	+19°00'	106.8°	18.5°
Opposition	21 May 2026	11.5	3.010 AU	2.003 AU	15h59m	-13°31'	173.1°	2.3°

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 Hermentaria are:

            e (Eccentricity)                : 0.1029058
            a (Semimajor axis)              : 2.7946187
            i (Inclination)                 : 8.75798
            Ω (Longitude of ascending node) : 91.84788
            ω (Argument of perihelion)      : 290.71415
            M (Mean anomaly)                : 144.76616
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 22.78533
            B (Latitude of perihelion)      : -8.18781
            P (Orbital period in years)     : 4.67            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-05-09 00:00 UT   10 44 27.9   +19 00 19     2.591    3.040  106.8   18.5   116   12.8 
2025-05-09 08:08 UT   10 44 33.1   +18 58 45     2.595    3.040  106.5   18.6   116   12.8 
2025-05-10 00:00 UT   10 44 43.7   +18 55 40     2.604    3.041  105.9   18.6   115   12.8 
2025-05-11 00:00 UT   10 45 00.8   +18 50 56     2.618    3.041  105.1   18.7   115   12.8 
2025-05-12 00:00 UT   10 45 18.9   +18 46 05     2.631    3.042  104.2   18.8   115   12.8 
2025-05-13 00:00 UT   10 45 38.3   +18 41 08     2.645    3.042  103.4   18.8   115   12.8 
2025-05-14 00:00 UT   10 45 58.7   +18 36 05     2.659    3.043  102.5   18.9   115   12.9 
2025-05-15 00:00 UT   10 46 20.2   +18 30 57     2.673    3.043  101.7   19.0   115   12.9 
2025-05-16 00:00 UT   10 46 42.9   +18 25 43     2.686    3.044  100.9   19.0   114   12.9 
2025-05-17 00:00 UT   10 47 06.6   +18 20 23     2.700    3.044  100.1   19.1   114   12.9 
2025-05-18 00:00 UT   10 47 31.3   +18 14 58     2.714    3.045   99.2   19.1   114   12.9 
2025-05-19 00:00 UT   10 47 57.2   +18 09 27     2.728    3.045   98.4   19.2   114   12.9 
2025-05-20 00:00 UT   10 48 24.0   +18 03 51     2.742    3.046   97.6   19.2   114   12.9 
2025-05-21 00:00 UT   10 48 51.9   +17 58 10     2.756    3.046   96.8   19.3   114   12.9 
2025-05-22 00:00 UT   10 49 20.8   +17 52 24     2.770    3.047   96.0   19.3   114   13.0 
2025-05-23 00:00 UT   10 49 50.6   +17 46 33     2.784    3.047   95.2   19.3   113   13.0 
2025-05-24 00:00 UT   10 50 21.5   +17 40 37     2.798    3.048   94.4   19.3   113   13.0 
2025-05-25 00:00 UT   10 50 53.3   +17 34 36     2.812    3.048   93.6   19.4   113   13.0 
2025-05-26 00:00 UT   10 51 26.1   +17 28 30     2.826    3.048   92.8   19.4   113   13.0 
2025-05-27 00:00 UT   10 51 59.8   +17 22 19     2.840    3.049   92.0   19.4   113   13.0 
2025-05-28 00:00 UT   10 52 34.5   +17 16 04     2.854    3.049   91.2   19.4   113   13.0 
2025-05-29 00:00 UT   10 53 10.0   +17 09 44     2.868    3.050   90.5   19.4   113   13.0 
2025-05-30 00:00 UT   10 53 46.5   +17 03 20     2.882    3.050   89.7   19.4   113   13.1 
2025-05-31 00:00 UT   10 54 23.8   +16 56 52     2.896    3.051   88.9   19.4   113   13.1 
2025-06-01 00:00 UT   10 55 02.0   +16 50 19     2.910    3.051   88.2   19.4   112   13.1 
2025-06-02 00:00 UT   10 55 41.1   +16 43 42     2.924    3.052   87.4   19.4   112   13.1 
2025-06-03 00:00 UT   10 56 21.0   +16 37 01     2.938    3.052   86.6   19.4   112   13.1 
2025-06-04 00:00 UT   10 57 01.7   +16 30 16     2.952    3.052   85.9   19.4   112   13.1 
2025-06-05 00:00 UT   10 57 43.2   +16 23 27     2.966    3.053   85.1   19.3   112   13.1 
2025-06-06 00:00 UT   10 58 25.5   +16 16 35     2.980    3.053   84.4   19.3   112   13.1 
2025-06-07 00:00 UT   10 59 08.6   +16 09 38     2.994    3.054   83.7   19.3   112   13.1 
2025-06-08 00:00 UT   10 59 52.4   +16 02 38     3.008    3.054   82.9   19.3   112   13.1 

    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.