(10) Hygiea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Sep 2025	11.9	3.462 AU	3.487 AU	06h12m	+25°08'	80.3°	16.6°
Opposition	21 Dec 2025	10.3	3.415 AU	2.431 AU	06h02m	+24°38'	178.4°	0.5°

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 Hygiea are:

            e (Eccentricity)                : 0.1096266
            a (Semimajor axis)              : 3.1436334
            i (Inclination)                 : 3.83243
            Ω (Longitude of ascending node) : 283.12779
            ω (Argument of perihelion)      : 312.70566
            M (Mean anomaly)                : 181.27891
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 235.89738
            B (Latitude of perihelion)      : -2.81529
            P (Orbital period in years)     : 5.57            
        

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
2025-09-16 00:00 UT   06 12 18.6   +25 08 16     3.487    3.462   80.3   16.6   272   11.9 
2025-09-16 09:07 UT   06 12 36.9   +25 08 09     3.482    3.462   80.6   16.6   272   11.9 
2025-09-17 00:00 UT   06 13 06.6   +25 07 56     3.472    3.462   81.0   16.7   272   11.9 
2025-09-18 00:00 UT   06 13 53.8   +25 07 36     3.458    3.461   81.8   16.7   272   11.9 
2025-09-19 00:00 UT   06 14 40.1   +25 07 15     3.443    3.461   82.6   16.7   272   11.9 
2025-09-20 00:00 UT   06 15 25.5   +25 06 54     3.428    3.460   83.5   16.8   272   11.9 
2025-09-21 00:00 UT   06 16 10.0   +25 06 32     3.413    3.460   84.3   16.8   272   11.9 
2025-09-22 00:00 UT   06 16 53.7   +25 06 10     3.398    3.460   85.1   16.8   272   11.9 
2025-09-23 00:00 UT   06 17 36.5   +25 05 47     3.383    3.459   85.9   16.8   272   11.9 
2025-09-24 00:00 UT   06 18 18.3   +25 05 24     3.368    3.459   86.7   16.8   272   11.9 
2025-09-25 00:00 UT   06 18 59.2   +25 05 00     3.353    3.458   87.5   16.8   272   11.9 
2025-09-26 00:00 UT   06 19 39.2   +25 04 36     3.338    3.458   88.4   16.8   272   11.9 
2025-09-27 00:00 UT   06 20 18.2   +25 04 12     3.323    3.458   89.2   16.9   272   11.8 
2025-09-28 00:00 UT   06 20 56.2   +25 03 48     3.308    3.457   90.0   16.8   272   11.8 
2025-09-29 00:00 UT   06 21 33.2   +25 03 24     3.293    3.457   90.9   16.8   272   11.8 
2025-09-30 00:00 UT   06 22 09.3   +25 02 59     3.278    3.456   91.7   16.8   272   11.8 
2025-10-01 00:00 UT   06 22 44.3   +25 02 35     3.263    3.456   92.6   16.8   272   11.8 
2025-10-02 00:00 UT   06 23 18.3   +25 02 10     3.248    3.456   93.4   16.8   272   11.8 
2025-10-03 00:00 UT   06 23 51.3   +25 01 46     3.233    3.455   94.3   16.8   272   11.8 
2025-10-04 00:00 UT   06 24 23.3   +25 01 21     3.218    3.455   95.1   16.8   272   11.8 
2025-10-05 00:00 UT   06 24 54.1   +25 00 57     3.203    3.454   96.0   16.7   272   11.8 
2025-10-06 00:00 UT   06 25 23.9   +25 00 32     3.188    3.454   96.9   16.7   272   11.8 
2025-10-07 00:00 UT   06 25 52.7   +25 00 08     3.173    3.454   97.8   16.7   272   11.7 
2025-10-08 00:00 UT   06 26 20.3   +24 59 44     3.159    3.453   98.6   16.6   272   11.7 
2025-10-09 00:00 UT   06 26 46.8   +24 59 20     3.144    3.453   99.5   16.6   272   11.7 
2025-10-10 00:00 UT   06 27 12.2   +24 58 57     3.129    3.452  100.4   16.5   272   11.7 
2025-10-11 00:00 UT   06 27 36.4   +24 58 34     3.114    3.452  101.3   16.5   272   11.7 
2025-10-12 00:00 UT   06 27 59.5   +24 58 11     3.099    3.451  102.2   16.4   272   11.7 
2025-10-13 00:00 UT   06 28 21.4   +24 57 48     3.085    3.451  103.1   16.4   272   11.7 
2025-10-14 00:00 UT   06 28 42.1   +24 57 26     3.070    3.451  104.0   16.3   272   11.7 
2025-10-15 00:00 UT   06 29 01.7   +24 57 05     3.056    3.450  105.0   16.2   272   11.6 
2025-10-16 00:00 UT   06 29 20.0   +24 56 43     3.041    3.450  105.9   16.1   272   11.6 

    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.