(202) Chryseis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	29 Oct 2025	12.1	3.091 AU	2.114 AU	02h31m	+01°27'	167.2°	4.1°
Today	12 Dec 2025	12.7	3.046 AU	2.332 AU	02h05m	+00°25'	128.7°	14.6°

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 Chryseis are:

            e (Eccentricity)                : 0.1051399
            a (Semimajor axis)              : 3.0675907
            i (Inclination)                 : 8.85320
            Ω (Longitude of ascending node) : 136.70557
            ω (Argument of perihelion)      : 359.61281
            M (Mean anomaly)                : 275.98248
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 136.32299
            B (Latitude of perihelion)      : -0.05959
            P (Orbital period in years)     : 5.37            
        

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
2025-12-12 00:00 UT   02 05 53.4   +00 25 50     2.332    3.046  128.7   14.6    60   12.7 
2025-12-12 02:18 UT   02 05 52.1   +00 26 01     2.333    3.046  128.6   14.6    60   12.7 
2025-12-13 00:00 UT   02 05 39.8   +00 27 54     2.342    3.045  127.7   14.8    61   12.8 
2025-12-14 00:00 UT   02 05 27.5   +00 30 07     2.352    3.044  126.6   15.0    61   12.8 
2025-12-15 00:00 UT   02 05 16.5   +00 32 29     2.362    3.043  125.6   15.2    61   12.8 
2025-12-16 00:00 UT   02 05 06.8   +00 34 59     2.373    3.042  124.6   15.4    62   12.8 
2025-12-17 00:00 UT   02 04 58.4   +00 37 38     2.383    3.041  123.6   15.6    62   12.8 
2025-12-18 00:00 UT   02 04 51.4   +00 40 26     2.394    3.040  122.6   15.8    62   12.8 
2025-12-19 00:00 UT   02 04 45.7   +00 43 22     2.405    3.039  121.7   16.0    63   12.9 
2025-12-20 00:00 UT   02 04 41.3   +00 46 27     2.416    3.038  120.7   16.2    63   12.9 
2025-12-21 00:00 UT   02 04 38.2   +00 49 40     2.427    3.037  119.7   16.3    63   12.9 
2025-12-22 00:00 UT   02 04 36.4   +00 53 00     2.438    3.036  118.7   16.5    64   12.9 
2025-12-23 00:00 UT   02 04 36.0   +00 56 29     2.449    3.035  117.7   16.7    64   12.9 
2025-12-24 00:00 UT   02 04 36.9   +01 00 06     2.461    3.034  116.8   16.8    64   12.9 
2025-12-25 00:00 UT   02 04 39.2   +01 03 50     2.472    3.033  115.8   17.0    64   12.9 
2025-12-26 00:00 UT   02 04 42.7   +01 07 41     2.484    3.032  114.9   17.1    65   13.0 
2025-12-27 00:00 UT   02 04 47.6   +01 11 40     2.495    3.031  113.9   17.3    65   13.0 
2025-12-28 00:00 UT   02 04 53.7   +01 15 47     2.507    3.029  113.0   17.4    65   13.0 
2025-12-29 00:00 UT   02 05 01.2   +01 19 60     2.519    3.028  112.0   17.5    65   13.0 
2025-12-30 00:00 UT   02 05 09.9   +01 24 20     2.531    3.027  111.1   17.6    66   13.0 
2025-12-31 00:00 UT   02 05 19.9   +01 28 47     2.543    3.026  110.2   17.8    66   13.0 
2026-01-01 00:00 UT   02 05 31.2   +01 33 20     2.555    3.025  109.2   17.9    66   13.0 
2026-01-02 00:00 UT   02 05 43.7   +01 37 60     2.568    3.024  108.3   18.0    66   13.1 
2026-01-03 00:00 UT   02 05 57.5   +01 42 46     2.580    3.023  107.4   18.1    67   13.1 
2026-01-04 00:00 UT   02 06 12.5   +01 47 38     2.592    3.022  106.5   18.2    67   13.1 
2026-01-05 00:00 UT   02 06 28.7   +01 52 36     2.605    3.021  105.6   18.3    67   13.1 
2026-01-06 00:00 UT   02 06 46.2   +01 57 40     2.617    3.020  104.7   18.4    67   13.1 
2026-01-07 00:00 UT   02 07 04.8   +02 02 50     2.630    3.019  103.8   18.4    67   13.1 
2026-01-08 00:00 UT   02 07 24.7   +02 08 05     2.642    3.018  102.9   18.5    68   13.1 
2026-01-09 00:00 UT   02 07 45.7   +02 13 26     2.655    3.017  102.0   18.6    68   13.1 
2026-01-10 00:00 UT   02 08 07.9   +02 18 52     2.668    3.016  101.1   18.7    68   13.2 
2026-01-11 00:00 UT   02 08 31.3   +02 24 24     2.681    3.015  100.2   18.7    68   13.2 

    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.