(258) Tyche
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	25 Jun 2025	14.2	3.137 AU	3.122 AU	11h35m	-01°12'	81.5°	18.7°
Opposition	4 Jun 2026	12.0	2.672 AU	1.685 AU	17h00m	-05°49'	163.2°	6.3°

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 Tyche are:

            e (Eccentricity)                : 0.2050103
            a (Semimajor axis)              : 2.6141035
            i (Inclination)                 : 14.32820
            Ω (Longitude of ascending node) : 207.53739
            ω (Argument of perihelion)      : 155.37429
            M (Mean anomaly)                : 183.22229
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 183.59041
            B (Latitude of perihelion)      : 5.91889
            P (Orbital period in years)     : 4.23            
        

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
2025-06-25 00:00 UT   11 35 23.7   -01 12 18     3.122    3.137   81.5   18.7   114   14.2 
2025-06-25 08:16 UT   11 35 39.9   -01 12 50     3.127    3.137   81.2   18.7   114   14.2 
2025-06-26 00:00 UT   11 36 11.1   -01 13 53     3.136    3.137   80.7   18.7   114   14.2 
2025-06-27 00:00 UT   11 36 59.1   -01 15 35     3.149    3.136   80.0   18.6   114   14.2 
2025-06-28 00:00 UT   11 37 47.9   -01 17 23     3.163    3.136   79.2   18.6   114   14.2 
2025-06-29 00:00 UT   11 38 37.3   -01 19 17     3.176    3.136   78.5   18.5   114   14.2 
2025-06-30 00:00 UT   11 39 27.4   -01 21 17     3.190    3.135   77.7   18.5   114   14.2 
2025-07-01 00:00 UT   11 40 18.1   -01 23 23     3.203    3.135   77.0   18.4   114   14.2 
2025-07-02 00:00 UT   11 41 09.4   -01 25 36     3.217    3.134   76.2   18.4   114   14.2 
2025-07-03 00:00 UT   11 42 01.4   -01 27 54     3.230    3.134   75.5   18.3   114   14.2 
2025-07-04 00:00 UT   11 42 53.9   -01 30 18     3.243    3.133   74.8   18.2   114   14.2 
2025-07-05 00:00 UT   11 43 47.1   -01 32 47     3.256    3.133   74.0   18.2   114   14.3 
2025-07-06 00:00 UT   11 44 40.9   -01 35 22     3.270    3.132   73.3   18.1   114   14.3 
2025-07-07 00:00 UT   11 45 35.2   -01 38 03     3.283    3.132   72.6   18.0   114   14.3 
2025-07-08 00:00 UT   11 46 30.1   -01 40 49     3.296    3.132   71.8   18.0   114   14.3 
2025-07-09 00:00 UT   11 47 25.6   -01 43 40     3.309    3.131   71.1   17.9   114   14.3 
2025-07-10 00:00 UT   11 48 21.6   -01 46 37     3.322    3.131   70.4   17.8   114   14.3 
2025-07-11 00:00 UT   11 49 18.2   -01 49 39     3.334    3.130   69.7   17.7   114   14.3 
2025-07-12 00:00 UT   11 50 15.3   -01 52 45     3.347    3.130   69.0   17.6   114   14.3 
2025-07-13 00:00 UT   11 51 12.9   -01 55 57     3.360    3.129   68.3   17.6   114   14.3 
2025-07-14 00:00 UT   11 52 11.0   -01 59 14     3.372    3.129   67.5   17.5   115   14.3 
2025-07-15 00:00 UT   11 53 09.7   -02 02 35     3.385    3.128   66.8   17.4   115   14.3 
2025-07-16 00:00 UT   11 54 08.9   -02 06 02     3.397    3.128   66.1   17.3   115   14.3 
2025-07-17 00:00 UT   11 55 08.6   -02 09 33     3.410    3.127   65.4   17.2   115   14.3 
2025-07-18 00:00 UT   11 56 08.7   -02 13 09     3.422    3.127   64.7   17.1   115   14.3 
2025-07-19 00:00 UT   11 57 09.4   -02 16 49     3.434    3.126   64.0   17.0   115   14.3 
2025-07-20 00:00 UT   11 58 10.5   -02 20 34     3.447    3.125   63.3   16.9   115   14.3 
2025-07-21 00:00 UT   11 59 12.1   -02 24 23     3.459    3.125   62.6   16.8   115   14.3 
2025-07-22 00:00 UT   12 00 14.2   -02 28 16     3.471    3.124   62.0   16.7   115   14.3 
2025-07-23 00:00 UT   12 01 16.8   -02 32 14     3.483    3.124   61.3   16.6   115   14.3 
2025-07-24 00:00 UT   12 02 19.8   -02 36 16     3.494    3.123   60.6   16.5   115   14.3 
2025-07-25 00:00 UT   12 03 23.3   -02 40 23     3.506    3.123   59.9   16.3   115   14.3 

    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.