(258) Tyche
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 May 2025	13.9	3.146 AU	2.724 AU	11h18m	-01°19'	105.2°	18.1°
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)                : 183.22230
            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
2025-05-27 00:00 UT   11 18 18.1   -01 19 02     2.724    3.146  105.2   18.1   112   13.9 
2025-05-27 20:09 UT   11 18 36.9   -01 17 15     2.735    3.146  104.5   18.2   112   13.9 
2025-05-28 00:00 UT   11 18 40.6   -01 16 55     2.737    3.146  104.4   18.2   112   13.9 
2025-05-29 00:00 UT   11 19 04.1   -01 14 57     2.751    3.146  103.5   18.3   112   13.9 
2025-05-30 00:00 UT   11 19 28.7   -01 13 07     2.764    3.145  102.6   18.3   112   13.9 
2025-05-31 00:00 UT   11 19 54.3   -01 11 27     2.778    3.145  101.7   18.4   112   13.9 
2025-06-01 00:00 UT   11 20 20.8   -01 09 55     2.792    3.145  100.9   18.5   112   13.9 
2025-06-02 00:00 UT   11 20 48.4   -01 08 31     2.805    3.145  100.0   18.5   112   14.0 
2025-06-03 00:00 UT   11 21 16.9   -01 07 16     2.819    3.144   99.2   18.6   112   14.0 
2025-06-04 00:00 UT   11 21 46.4   -01 06 09     2.833    3.144   98.3   18.6   112   14.0 
2025-06-05 00:00 UT   11 22 16.9   -01 05 11     2.846    3.144   97.5   18.7   113   14.0 
2025-06-06 00:00 UT   11 22 48.2   -01 04 20     2.860    3.144   96.6   18.7   113   14.0 
2025-06-07 00:00 UT   11 23 20.5   -01 03 38     2.874    3.143   95.8   18.7   113   14.0 
2025-06-08 00:00 UT   11 23 53.7   -01 03 03     2.888    3.143   95.0   18.8   113   14.0 
2025-06-09 00:00 UT   11 24 27.7   -01 02 37     2.902    3.143   94.2   18.8   113   14.0 
2025-06-10 00:00 UT   11 25 02.7   -01 02 18     2.915    3.142   93.3   18.8   113   14.1 
2025-06-11 00:00 UT   11 25 38.5   -01 02 07     2.929    3.142   92.5   18.8   113   14.1 
2025-06-12 00:00 UT   11 26 15.1   -01 02 04     2.943    3.142   91.7   18.8   113   14.1 
2025-06-13 00:00 UT   11 26 52.6   -01 02 08     2.957    3.142   90.9   18.9   113   14.1 
2025-06-14 00:00 UT   11 27 30.9   -01 02 20     2.971    3.141   90.1   18.9   113   14.1 
2025-06-15 00:00 UT   11 28 10.1   -01 02 39     2.985    3.141   89.3   18.9   113   14.1 
2025-06-16 00:00 UT   11 28 50.0   -01 03 05     2.998    3.141   88.5   18.9   113   14.1 
2025-06-17 00:00 UT   11 29 30.7   -01 03 39     3.012    3.140   87.7   18.9   113   14.1 
2025-06-18 00:00 UT   11 30 12.2   -01 04 20     3.026    3.140   86.9   18.9   113   14.1 
2025-06-19 00:00 UT   11 30 54.5   -01 05 07     3.040    3.139   86.1   18.8   114   14.1 
2025-06-20 00:00 UT   11 31 37.5   -01 06 02     3.054    3.139   85.3   18.8   114   14.1 
2025-06-21 00:00 UT   11 32 21.3   -01 07 04     3.067    3.139   84.6   18.8   114   14.2 
2025-06-22 00:00 UT   11 33 05.8   -01 08 12     3.081    3.138   83.8   18.8   114   14.2 
2025-06-23 00:00 UT   11 33 51.0   -01 09 28     3.095    3.138   83.0   18.8   114   14.2 
2025-06-24 00:00 UT   11 34 37.0   -01 10 50     3.109    3.138   82.3   18.7   114   14.2 
2025-06-25 00:00 UT   11 35 23.7   -01 12 18     3.122    3.137   81.5   18.7   114   14.2 
2025-06-26 00:00 UT   11 36 11.1   -01 13 53     3.136    3.137   80.7   18.7   114   14.2 

    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.