(202) Chryseis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	1 Jul 2025	13.8	3.207 AU	3.462 AU	02h09m	+05°38'	67.1°	17.0°
Opposition	29 Oct 2025	12.1	3.091 AU	2.115 AU	02h31m	+01°27'	167.2°	4.1°

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 Chryseis are:

            e (Eccentricity)                : 0.1050073
            a (Semimajor axis)              : 3.0676252
            i (Inclination)                 : 8.85320
            Ω (Longitude of ascending node) : 136.70555
            ω (Argument of perihelion)      : 359.62066
            M (Mean anomaly)                : 239.27032
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 136.33073
            B (Latitude of perihelion)      : -0.05838
            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. 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
2025-07-01 00:00 UT   02 09 26.3   +05 38 21     3.462    3.207   67.1   17.0   247   13.8 
2025-07-01 01:14 UT   02 09 29.5   +05 38 31     3.462    3.207   67.2   17.0   247   13.8 
2025-07-02 00:00 UT   02 10 28.6   +05 41 28     3.449    3.206   67.8   17.1   247   13.8 
2025-07-03 00:00 UT   02 11 30.4   +05 44 31     3.435    3.206   68.5   17.2   248   13.8 
2025-07-04 00:00 UT   02 12 31.8   +05 47 29     3.421    3.205   69.2   17.3   248   13.8 
2025-07-05 00:00 UT   02 13 32.8   +05 50 22     3.408    3.204   69.9   17.3   248   13.8 
2025-07-06 00:00 UT   02 14 33.2   +05 53 10     3.394    3.203   70.6   17.4   248   13.8 
2025-07-07 00:00 UT   02 15 33.2   +05 55 53     3.380    3.202   71.3   17.5   248   13.8 
2025-07-08 00:00 UT   02 16 32.7   +05 58 31     3.366    3.201   72.0   17.6   248   13.8 
2025-07-09 00:00 UT   02 17 31.7   +06 01 04     3.352    3.200   72.7   17.7   248   13.8 
2025-07-10 00:00 UT   02 18 30.2   +06 03 31     3.338    3.199   73.4   17.7   249   13.7 
2025-07-11 00:00 UT   02 19 28.1   +06 05 54     3.324    3.198   74.1   17.8   249   13.7 
2025-07-12 00:00 UT   02 20 25.5   +06 08 12     3.309    3.197   74.8   17.9   249   13.7 
2025-07-13 00:00 UT   02 21 22.4   +06 10 24     3.295    3.197   75.5   17.9   249   13.7 
2025-07-14 00:00 UT   02 22 18.8   +06 12 31     3.281    3.196   76.2   18.0   249   13.7 
2025-07-15 00:00 UT   02 23 14.5   +06 14 33     3.267    3.195   77.0   18.1   249   13.7 
2025-07-16 00:00 UT   02 24 09.8   +06 16 29     3.252    3.194   77.7   18.1   249   13.7 
2025-07-17 00:00 UT   02 25 04.4   +06 18 20     3.238    3.193   78.4   18.2   250   13.7 
2025-07-18 00:00 UT   02 25 58.4   +06 20 06     3.224    3.192   79.1   18.2   250   13.7 
2025-07-19 00:00 UT   02 26 51.8   +06 21 46     3.209    3.191   79.9   18.3   250   13.7 
2025-07-20 00:00 UT   02 27 44.6   +06 23 21     3.195    3.190   80.6   18.3   250   13.7 
2025-07-21 00:00 UT   02 28 36.8   +06 24 50     3.180    3.189   81.3   18.4   250   13.7 
2025-07-22 00:00 UT   02 29 28.3   +06 26 13     3.166    3.188   82.1   18.4   250   13.6 
2025-07-23 00:00 UT   02 30 19.2   +06 27 31     3.151    3.187   82.8   18.4   250   13.6 
2025-07-24 00:00 UT   02 31 09.4   +06 28 43     3.137    3.186   83.5   18.5   251   13.6 
2025-07-25 00:00 UT   02 31 58.9   +06 29 49     3.122    3.186   84.3   18.5   251   13.6 
2025-07-26 00:00 UT   02 32 47.7   +06 30 50     3.107    3.185   85.0   18.5   251   13.6 
2025-07-27 00:00 UT   02 33 35.8   +06 31 44     3.093    3.184   85.8   18.5   251   13.6 
2025-07-28 00:00 UT   02 34 23.1   +06 32 33     3.078    3.183   86.5   18.6   251   13.6 
2025-07-29 00:00 UT   02 35 09.8   +06 33 16     3.064    3.182   87.3   18.6   251   13.6 
2025-07-30 00:00 UT   02 35 55.6   +06 33 53     3.049    3.181   88.1   18.6   252   13.6 
2025-07-31 00:00 UT   02 36 40.8   +06 34 25     3.034    3.180   88.8   18.6   252   13.6 

    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.