(133) Cyrene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	14 Dec 2025	13.3	3.387 AU	2.512 AU	07h45m	+26°47'	148.0°	8.9°
Opposition	8 Jan 2026	12.8	3.368 AU	2.388 AU	07h24m	+27°13'	174.8°	1.5°

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 Cyrene are:

            e (Eccentricity)                : 0.1302969
            a (Semimajor axis)              : 3.0741951
            i (Inclination)                 : 7.22452
            Ω (Longitude of ascending node) : 318.66882
            ω (Argument of perihelion)      : 291.64999
            M (Mean anomaly)                : 219.01980
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 250.47587
            B (Latitude of perihelion)      : -6.71243
            P (Orbital period in years)     : 5.39            
        

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-12-14 00:00 UT   07 45 15.6   +26 47 59     2.512    3.387  148.0    8.9   271   13.3 
2025-12-14 18:03 UT   07 44 47.2   +26 48 56     2.506    3.387  148.9    8.6   271   13.3 
2025-12-15 00:00 UT   07 44 37.6   +26 49 15     2.504    3.387  149.2    8.6   271   13.3 
2025-12-16 00:00 UT   07 43 58.4   +26 50 31     2.496    3.386  150.3    8.3   270   13.2 
2025-12-17 00:00 UT   07 43 18.0   +26 51 48     2.488    3.385  151.5    8.0   270   13.2 
2025-12-18 00:00 UT   07 42 36.4   +26 53 04     2.480    3.384  152.6    7.7   269   13.2 
2025-12-19 00:00 UT   07 41 53.7   +26 54 19     2.473    3.384  153.8    7.4   269   13.2 
2025-12-20 00:00 UT   07 41 09.9   +26 55 34     2.466    3.383  154.9    7.1   268   13.2 
2025-12-21 00:00 UT   07 40 25.1   +26 56 48     2.459    3.382  156.1    6.8   267   13.1 
2025-12-22 00:00 UT   07 39 39.2   +26 58 01     2.453    3.381  157.2    6.5   267   13.1 
2025-12-23 00:00 UT   07 38 52.4   +26 59 13     2.447    3.381  158.4    6.1   266   13.1 
2025-12-24 00:00 UT   07 38 04.6   +27 00 24     2.441    3.380  159.6    5.8   265   13.1 
2025-12-25 00:00 UT   07 37 15.9   +27 01 33     2.435    3.379  160.7    5.5   264   13.1 
2025-12-26 00:00 UT   07 36 26.4   +27 02 41     2.430    3.378  161.9    5.2   263   13.0 
2025-12-27 00:00 UT   07 35 36.0   +27 03 46     2.425    3.378  163.0    4.9   261   13.0 
2025-12-28 00:00 UT   07 34 45.0   +27 04 50     2.420    3.377  164.2    4.6   260   13.0 
2025-12-29 00:00 UT   07 33 53.1   +27 05 52     2.416    3.376  165.3    4.2   258   13.0 
2025-12-30 00:00 UT   07 33 00.7   +27 06 51     2.412    3.375  166.4    3.9   256   13.0 
2025-12-31 00:00 UT   07 32 07.6   +27 07 47     2.408    3.375  167.5    3.6   254   12.9 
2026-01-01 00:00 UT   07 31 13.9   +27 08 41     2.404    3.374  168.6    3.3   251   12.9 
2026-01-02 00:00 UT   07 30 19.8   +27 09 33     2.401    3.373  169.7    3.0   248   12.9 
2026-01-03 00:00 UT   07 29 25.2   +27 10 21     2.398    3.372  170.7    2.7   244   12.9 
2026-01-04 00:00 UT   07 28 30.1   +27 11 06     2.396    3.372  171.7    2.4   239   12.8 
2026-01-05 00:00 UT   07 27 34.7   +27 11 48     2.393    3.371  172.7    2.1   233   12.8 
2026-01-06 00:00 UT   07 26 39.0   +27 12 27     2.391    3.370  173.5    1.9   226   12.8 
2026-01-07 00:00 UT   07 25 43.0   +27 13 03     2.390    3.369  174.1    1.7   216   12.8 
2026-01-08 00:00 UT   07 24 46.8   +27 13 35     2.388    3.368  174.6    1.6   204   12.8 
2026-01-09 00:00 UT   07 23 50.5   +27 14 04     2.387    3.368  174.9    1.5   191   12.8 
2026-01-10 00:00 UT   07 22 54.1   +27 14 29     2.386    3.367  174.8    1.5   177   12.8 
2026-01-11 00:00 UT   07 21 57.6   +27 14 50     2.386    3.366  174.5    1.6   165   12.8 
2026-01-12 00:00 UT   07 21 01.1   +27 15 07     2.386    3.365  173.9    1.8   154   12.8 
2026-01-13 00:00 UT   07 20 04.8   +27 15 21     2.386    3.364  173.1    2.0   145   12.8 

    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.