(202) Chryseis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Jul 2025	13.6	3.188 AU	3.166 AU	02h29m	+06°26'	82.1°	18.4°
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
2025-07-22 00:00 UT   02 29 28.3   +06 26 13     3.166    3.188   82.1   18.4   250   13.6 
2025-07-22 07:49 UT   02 29 45.0   +06 26 39     3.161    3.188   82.3   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 
2025-08-01 00:00 UT   02 37 25.1   +06 34 50     3.020    3.179   89.6   18.6   252   13.5 
2025-08-02 00:00 UT   02 38 08.7   +06 35 10     3.005    3.178   90.4   18.6   252   13.5 
2025-08-03 00:00 UT   02 38 51.4   +06 35 23     2.990    3.177   91.2   18.6   252   13.5 
2025-08-04 00:00 UT   02 39 33.4   +06 35 31     2.976    3.176   91.9   18.6   252   13.5 
2025-08-05 00:00 UT   02 40 14.5   +06 35 32     2.961    3.175   92.7   18.6   252   13.5 
2025-08-06 00:00 UT   02 40 54.9   +06 35 28     2.947    3.174   93.5   18.6   253   13.5 
2025-08-07 00:00 UT   02 41 34.3   +06 35 18     2.932    3.173   94.3   18.6   253   13.5 
2025-08-08 00:00 UT   02 42 12.9   +06 35 01     2.917    3.172   95.1   18.6   253   13.5 
2025-08-09 00:00 UT   02 42 50.7   +06 34 39     2.903    3.172   95.9   18.5   253   13.5 
2025-08-10 00:00 UT   02 43 27.5   +06 34 10     2.888    3.171   96.7   18.5   253   13.4 
2025-08-11 00:00 UT   02 44 03.4   +06 33 35     2.874    3.170   97.5   18.5   253   13.4 
2025-08-12 00:00 UT   02 44 38.5   +06 32 54     2.859    3.169   98.3   18.4   254   13.4 
2025-08-13 00:00 UT   02 45 12.6   +06 32 07     2.845    3.168   99.1   18.4   254   13.4 
2025-08-14 00:00 UT   02 45 45.8   +06 31 14     2.830    3.167  100.0   18.4   254   13.4 
2025-08-15 00:00 UT   02 46 18.0   +06 30 14     2.816    3.166  100.8   18.3   254   13.4 
2025-08-16 00:00 UT   02 46 49.2   +06 29 09     2.802    3.165  101.6   18.3   254   13.4 
2025-08-17 00:00 UT   02 47 19.5   +06 27 57     2.787    3.164  102.4   18.2   255   13.3 
2025-08-18 00:00 UT   02 47 48.7   +06 26 38     2.773    3.163  103.3   18.1   255   13.3 
2025-08-19 00:00 UT   02 48 16.9   +06 25 14     2.759    3.162  104.1   18.1   255   13.3 
2025-08-20 00:00 UT   02 48 44.1   +06 23 43     2.745    3.161  105.0   18.0   255   13.3 
2025-08-21 00:00 UT   02 49 10.2   +06 22 06     2.731    3.160  105.8   17.9   255   13.3 

    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.