(10) Hygiea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	21 Dec 2025	10.3	3.415 AU	2.432 AU	06h02m	+24°38'	178.4°	0.5°
Today	29 Dec 2025	10.5	3.411 AU	2.434 AU	05h56m	+24°31'	171.9°	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 Hygiea are:

            e (Eccentricity)                : 0.1082238
            a (Semimajor axis)              : 3.1475914
            i (Inclination)                 : 3.83294
            Ω (Longitude of ascending node) : 283.12164
            ω (Argument of perihelion)      : 312.60583
            M (Mean anomaly)                : 216.69031
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 235.79140
            B (Latitude of perihelion)      : -2.82019
            P (Orbital period in years)     : 5.58            
        

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
2025-12-29 00:00 UT   05 56 02.9   +24 31 44     2.434    3.411  171.9    2.3    97   10.5 
2025-12-29 07:55 UT   05 55 45.6   +24 31 25     2.435    3.410  171.5    2.4    97   10.5 
2025-12-30 00:00 UT   05 55 10.5   +24 30 45     2.436    3.410  170.7    2.7    96   10.5 
2025-12-31 00:00 UT   05 54 18.6   +24 29 46     2.438    3.409  169.5    3.0    95   10.6 
2026-01-01 00:00 UT   05 53 27.0   +24 28 45     2.440    3.409  168.3    3.4    94   10.6 
2026-01-02 00:00 UT   05 52 36.0   +24 27 42     2.443    3.408  167.0    3.7    94   10.6 
2026-01-03 00:00 UT   05 51 45.6   +24 26 39     2.446    3.407  165.8    4.0    93   10.6 
2026-01-04 00:00 UT   05 50 55.7   +24 25 34     2.449    3.407  164.6    4.4    93   10.6 
2026-01-05 00:00 UT   05 50 06.4   +24 24 28     2.452    3.406  163.4    4.7    92   10.7 
2026-01-06 00:00 UT   05 49 17.8   +24 23 20     2.456    3.406  162.2    5.1    92   10.7 
2026-01-07 00:00 UT   05 48 30.0   +24 22 12     2.460    3.405  161.0    5.4    92   10.7 
2026-01-08 00:00 UT   05 47 42.9   +24 21 03     2.464    3.404  159.8    5.7    91   10.7 
2026-01-09 00:00 UT   05 46 56.6   +24 19 53     2.469    3.404  158.6    6.0    91   10.7 
2026-01-10 00:00 UT   05 46 11.2   +24 18 42     2.474    3.403  157.5    6.4    91   10.8 
2026-01-11 00:00 UT   05 45 26.6   +24 17 31     2.479    3.402  156.3    6.7    91   10.8 
2026-01-12 00:00 UT   05 44 43.0   +24 16 19     2.484    3.402  155.1    7.0    90   10.8 
2026-01-13 00:00 UT   05 44 00.3   +24 15 06     2.490    3.401  153.9    7.3    90   10.8 
2026-01-14 00:00 UT   05 43 18.6   +24 13 54     2.496    3.400  152.7    7.6    90   10.8 
2026-01-15 00:00 UT   05 42 38.0   +24 12 40     2.502    3.400  151.6    7.9    90   10.9 
2026-01-16 00:00 UT   05 41 58.4   +24 11 27     2.509    3.399  150.4    8.2    90   10.9 
2026-01-17 00:00 UT   05 41 20.0   +24 10 13     2.516    3.399  149.2    8.5    90   10.9 
2026-01-18 00:00 UT   05 40 42.6   +24 08 60     2.523    3.398  148.1    8.8    89   10.9 
2026-01-19 00:00 UT   05 40 06.5   +24 07 46     2.530    3.397  146.9    9.1    89   10.9 
2026-01-20 00:00 UT   05 39 31.5   +24 06 32     2.538    3.397  145.8    9.4    89   10.9 
2026-01-21 00:00 UT   05 38 57.8   +24 05 19     2.545    3.396  144.6    9.7    89   11.0 
2026-01-22 00:00 UT   05 38 25.3   +24 04 06     2.553    3.395  143.5    9.9    89   11.0 
2026-01-23 00:00 UT   05 37 54.1   +24 02 53     2.562    3.395  142.3   10.2    89   11.0 
2026-01-24 00:00 UT   05 37 24.1   +24 01 41     2.570    3.394  141.2   10.5    89   11.0 
2026-01-25 00:00 UT   05 36 55.5   +24 00 29     2.579    3.393  140.1   10.7    89   11.0 
2026-01-26 00:00 UT   05 36 28.2   +23 59 18     2.588    3.393  139.0   11.0    88   11.1 
2026-01-27 00:00 UT   05 36 02.2   +23 58 07     2.597    3.392  137.8   11.2    88   11.1 
2026-01-28 00:00 UT   05 35 37.6   +23 56 57     2.606    3.391  136.7   11.5    88   11.1 

    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.