(346) Hermentaria
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	2 Mar 2025	11.6	3.000 AU	2.024 AU	11h12m	+18°24'	167.7°	4.0°
Today	21 Mar 2025	11.9	3.012 AU	2.081 AU	10h57m	+19°52'	154.7°	8.1°

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 Hermentaria are:

            e (Eccentricity)                : 0.1029058
            a (Semimajor axis)              : 2.7946187
            i (Inclination)                 : 8.75798
            Ω (Longitude of ascending node) : 91.84787
            ω (Argument of perihelion)      : 290.71416
            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
2025-03-21 00:00 UT   10 57 35.8   +19 52 36     2.081    3.012  154.7    8.1   140   11.9 
2025-03-21 09:57 UT   10 57 17.4   +19 53 55     2.084    3.012  154.3    8.3   140   11.9 
2025-03-22 00:00 UT   10 56 51.6   +19 55 42     2.087    3.013  153.7    8.4   139   11.9 
2025-03-23 00:00 UT   10 56 08.2   +19 58 38     2.093    3.013  152.6    8.7   138   11.9 
2025-03-24 00:00 UT   10 55 25.7   +20 01 21     2.099    3.014  151.6    9.0   136   12.0 
2025-03-25 00:00 UT   10 54 44.0   +20 03 54     2.106    3.015  150.6    9.4   135   12.0 
2025-03-26 00:00 UT   10 54 03.3   +20 06 15     2.113    3.015  149.5    9.7   134   12.0 
2025-03-27 00:00 UT   10 53 23.5   +20 08 25     2.120    3.016  148.5   10.0   133   12.0 
2025-03-28 00:00 UT   10 52 44.7   +20 10 24     2.127    3.017  147.4   10.3   132   12.0 
2025-03-29 00:00 UT   10 52 07.0   +20 12 11     2.135    3.017  146.4   10.5   132   12.1 
2025-03-30 00:00 UT   10 51 30.3   +20 13 47     2.142    3.018  145.4   10.8   131   12.1 
2025-03-31 00:00 UT   10 50 54.7   +20 15 11     2.150    3.018  144.3   11.1   130   12.1 
2025-04-01 00:00 UT   10 50 20.2   +20 16 24     2.158    3.019  143.3   11.4   129   12.1 
2025-04-02 00:00 UT   10 49 46.9   +20 17 25     2.167    3.020  142.2   11.7   129   12.1 
2025-04-03 00:00 UT   10 49 14.8   +20 18 16     2.175    3.020  141.2   12.0   128   12.2 
2025-04-04 00:00 UT   10 48 43.9   +20 18 55     2.184    3.021  140.2   12.2   127   12.2 
2025-04-05 00:00 UT   10 48 14.3   +20 19 23     2.193    3.021  139.1   12.5   127   12.2 
2025-04-06 00:00 UT   10 47 45.9   +20 19 40     2.202    3.022  138.1   12.8   126   12.2 
2025-04-07 00:00 UT   10 47 18.7   +20 19 46     2.212    3.023  137.1   13.0   126   12.2 
2025-04-08 00:00 UT   10 46 52.8   +20 19 41     2.221    3.023  136.1   13.3   125   12.3 
2025-04-09 00:00 UT   10 46 28.3   +20 19 26     2.231    3.024  135.0   13.5   125   12.3 
2025-04-10 00:00 UT   10 46 05.0   +20 19 00     2.241    3.024  134.0   13.8   124   12.3 
2025-04-11 00:00 UT   10 45 43.0   +20 18 24     2.251    3.025  133.0   14.0   124   12.3 
2025-04-12 00:00 UT   10 45 22.4   +20 17 38     2.262    3.026  132.0   14.2   123   12.3 
2025-04-13 00:00 UT   10 45 03.0   +20 16 41     2.272    3.026  131.0   14.5   123   12.4 
2025-04-14 00:00 UT   10 44 45.0   +20 15 34     2.283    3.027  130.0   14.7   122   12.4 
2025-04-15 00:00 UT   10 44 28.4   +20 14 18     2.294    3.027  129.0   14.9   122   12.4 
2025-04-16 00:00 UT   10 44 13.1   +20 12 52     2.305    3.028  128.0   15.1   122   12.4 
2025-04-17 00:00 UT   10 43 59.1   +20 11 16     2.316    3.028  127.1   15.3   121   12.4 
2025-04-18 00:00 UT   10 43 46.5   +20 09 31     2.327    3.029  126.1   15.5   121   12.4 
2025-04-19 00:00 UT   10 43 35.2   +20 07 36     2.338    3.030  125.1   15.7   120   12.5 
2025-04-20 00:00 UT   10 43 25.3   +20 05 33     2.350    3.030  124.1   15.9   120   12.5 

    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.