(133) Cyrene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Oct 2025	14.0	3.416 AU	3.057 AU	07h50m	+26°21'	102.7°	16.5°
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
2025-10-31 00:00 UT   07 50 34.8   +26 21 52     3.057    3.416  102.7   16.5   279   14.0 
2025-10-31 13:18 UT   07 50 46.9   +26 21 40     3.049    3.416  103.2   16.4   279   14.0 
2025-11-01 00:00 UT   07 50 56.4   +26 21 31     3.043    3.416  103.6   16.4   279   14.0 
2025-11-02 00:00 UT   07 51 16.8   +26 21 12     3.028    3.415  104.6   16.3   279   14.0 
2025-11-03 00:00 UT   07 51 36.0   +26 20 56     3.013    3.415  105.5   16.3   279   14.0 
2025-11-04 00:00 UT   07 51 53.9   +26 20 42     2.998    3.414  106.4   16.2   279   14.0 
2025-11-05 00:00 UT   07 52 10.6   +26 20 32     2.984    3.413  107.4   16.1   279   14.0 
2025-11-06 00:00 UT   07 52 26.1   +26 20 24     2.969    3.413  108.3   16.0   279   13.9 
2025-11-07 00:00 UT   07 52 40.2   +26 20 20     2.955    3.412  109.2   15.9   279   13.9 
2025-11-08 00:00 UT   07 52 53.1   +26 20 18     2.940    3.412  110.2   15.8   279   13.9 
2025-11-09 00:00 UT   07 53 04.7   +26 20 19     2.926    3.411  111.1   15.7   279   13.9 
2025-11-10 00:00 UT   07 53 15.0   +26 20 23     2.912    3.410  112.1   15.6   279   13.9 
2025-11-11 00:00 UT   07 53 23.9   +26 20 30     2.898    3.410  113.1   15.5   279   13.9 
2025-11-12 00:00 UT   07 53 31.5   +26 20 40     2.884    3.409  114.1   15.4   279   13.8 
2025-11-13 00:00 UT   07 53 37.8   +26 20 53     2.870    3.408  115.0   15.3   278   13.8 
2025-11-14 00:00 UT   07 53 42.7   +26 21 09     2.856    3.408  116.0   15.1   278   13.8 
2025-11-15 00:00 UT   07 53 46.2   +26 21 27     2.842    3.407  117.0   15.0   278   13.8 
2025-11-16 00:00 UT   07 53 48.3   +26 21 49     2.828    3.407  118.0   14.9   278   13.8 
2025-11-17 00:00 UT   07 53 49.1   +26 22 14     2.815    3.406  119.0   14.7   278   13.8 
2025-11-18 00:00 UT   07 53 48.4   +26 22 41     2.802    3.405  120.0   14.6   278   13.8 
2025-11-19 00:00 UT   07 53 46.4   +26 23 12     2.788    3.405  121.0   14.4   278   13.7 
2025-11-20 00:00 UT   07 53 42.9   +26 23 45     2.775    3.404  122.0   14.2   278   13.7 
2025-11-21 00:00 UT   07 53 38.0   +26 24 21     2.762    3.403  123.1   14.1   277   13.7 
2025-11-22 00:00 UT   07 53 31.6   +26 24 60     2.749    3.403  124.1   13.9   277   13.7 
2025-11-23 00:00 UT   07 53 23.9   +26 25 41     2.737    3.402  125.1   13.7   277   13.7 
2025-11-24 00:00 UT   07 53 14.7   +26 26 25     2.724    3.401  126.2   13.6   277   13.7 
2025-11-25 00:00 UT   07 53 04.1   +26 27 12     2.712    3.401  127.2   13.4   277   13.6 
2025-11-26 00:00 UT   07 52 52.0   +26 28 01     2.699    3.400  128.3   13.2   277   13.6 
2025-11-27 00:00 UT   07 52 38.5   +26 28 53     2.687    3.399  129.3   13.0   276   13.6 
2025-11-28 00:00 UT   07 52 23.6   +26 29 47     2.675    3.399  130.4   12.8   276   13.6 
2025-11-29 00:00 UT   07 52 07.3   +26 30 43     2.664    3.398  131.4   12.6   276   13.6 
2025-11-30 00:00 UT   07 51 49.5   +26 31 41     2.652    3.397  132.5   12.4   276   13.6 

    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.