(24) Themis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	25 Feb 2025	10.8	2.787 AU	1.797 AU	10h38m	+09°39'	178.8°	0.4°
Today	26 Mar 2025	11.6	2.795 AU	1.903 AU	10h19m	+11°23'	147.2°	11.1°

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 Themis are:

            e (Eccentricity)                : 0.1152743
            a (Semimajor axis)              : 3.1427396
            i (Inclination)                 : 0.73676
            Ω (Longitude of ascending node) : 36.38940
            ω (Argument of perihelion)      : 109.03455
            M (Mean anomaly)                : 21.45734
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : -34.57459
            B (Latitude of perihelion)      : 0.69647
            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
2025-03-26 00:00 UT   10 19 03.1   +11 23 45     1.903    2.795  147.2   11.1   112   11.6 
2025-03-26 10:33 UT   10 18 51.1   +11 24 44     1.907    2.795  146.7   11.3   112   11.6 
2025-03-27 00:00 UT   10 18 36.0   +11 25 56     1.911    2.795  146.1   11.5   112   11.6 
2025-03-28 00:00 UT   10 18 10.2   +11 27 60     1.919    2.796  145.0   11.8   112   11.6 
2025-03-29 00:00 UT   10 17 45.7   +11 29 56     1.926    2.796  143.9   12.1   112   11.6 
2025-03-30 00:00 UT   10 17 22.5   +11 31 44     1.935    2.796  142.8   12.5   112   11.6 
2025-03-31 00:00 UT   10 17 00.6   +11 33 24     1.943    2.797  141.8   12.8   112   11.7 
2025-04-01 00:00 UT   10 16 40.1   +11 34 56     1.951    2.797  140.7   13.1   112   11.7 
2025-04-02 00:00 UT   10 16 21.0   +11 36 20     1.960    2.797  139.6   13.4   112   11.7 
2025-04-03 00:00 UT   10 16 03.3   +11 37 36     1.969    2.798  138.6   13.7   112   11.7 
2025-04-04 00:00 UT   10 15 46.9   +11 38 44     1.978    2.798  137.5   14.0   112   11.8 
2025-04-05 00:00 UT   10 15 32.0   +11 39 44     1.987    2.799  136.5   14.3   112   11.8 
2025-04-06 00:00 UT   10 15 18.5   +11 40 36     1.997    2.799  135.4   14.5   112   11.8 
2025-04-07 00:00 UT   10 15 06.4   +11 41 20     2.006    2.799  134.4   14.8   112   11.8 
2025-04-08 00:00 UT   10 14 55.8   +11 41 55     2.016    2.800  133.4   15.1   112   11.8 
2025-04-09 00:00 UT   10 14 46.5   +11 42 23     2.026    2.800  132.3   15.3   112   11.9 
2025-04-10 00:00 UT   10 14 38.7   +11 42 42     2.036    2.801  131.3   15.6   112   11.9 
2025-04-11 00:00 UT   10 14 32.3   +11 42 54     2.047    2.801  130.3   15.8   112   11.9 
2025-04-12 00:00 UT   10 14 27.4   +11 42 57     2.057    2.801  129.3   16.1   111   11.9 
2025-04-13 00:00 UT   10 14 23.8   +11 42 53     2.068    2.802  128.3   16.3   111   11.9 
2025-04-14 00:00 UT   10 14 21.7   +11 42 40     2.078    2.802  127.3   16.5   111   12.0 
2025-04-15 00:00 UT   10 14 20.9   +11 42 20     2.089    2.803  126.4   16.8   111   12.0 
2025-04-16 00:00 UT   10 14 21.6   +11 41 52     2.100    2.803  125.4   17.0   111   12.0 
2025-04-17 00:00 UT   10 14 23.7   +11 41 16     2.111    2.804  124.4   17.2   111   12.0 
2025-04-18 00:00 UT   10 14 27.2   +11 40 32     2.122    2.804  123.5   17.4   111   12.0 
2025-04-19 00:00 UT   10 14 32.0   +11 39 41     2.134    2.805  122.5   17.6   111   12.0 
2025-04-20 00:00 UT   10 14 38.3   +11 38 42     2.145    2.805  121.6   17.8   111   12.1 
2025-04-21 00:00 UT   10 14 45.9   +11 37 35     2.157    2.805  120.6   18.0   111   12.1 
2025-04-22 00:00 UT   10 14 54.9   +11 36 21     2.169    2.806  119.7   18.1   111   12.1 
2025-04-23 00:00 UT   10 15 05.2   +11 34 59     2.181    2.806  118.8   18.3   111   12.1 
2025-04-24 00:00 UT   10 15 16.9   +11 33 30     2.193    2.807  117.8   18.5   111   12.1 
2025-04-25 00:00 UT   10 15 29.9   +11 31 53     2.205    2.807  116.9   18.6   111   12.2 

    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.