(133) Cyrene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Jul 2025	14.4	3.465 AU	4.388 AU	05h52m	+28°11'	21.8°	6.3°
Opposition	8 Jan 2026	12.8	3.366 AU	2.386 AU	07h24m	+27°14'	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)                : 0.1319809
            a (Semimajor axis)              : 3.0705467
            i (Inclination)                 : 7.21177
            Ω (Longitude of ascending node) : 318.79974
            ω (Argument of perihelion)      : 291.25412
            M (Mean anomaly)                : 182.82131
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 250.20806
            B (Latitude of perihelion)      : -6.71889
            P (Orbital period in years)     : 5.38            
        

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
2025-07-12 00:00 UT   05 52 07.3   +28 11 25     4.388    3.465   21.8    6.3   281   14.4 
2025-07-12 06:00 UT   05 52 28.9   +28 11 27     4.386    3.465   22.0    6.3   281   14.4 
2025-07-13 00:00 UT   05 53 33.7   +28 11 32     4.382    3.464   22.4    6.4   281   14.4 
2025-07-14 00:00 UT   05 54 60.0   +28 11 36     4.376    3.464   23.1    6.6   281   14.4 
2025-07-15 00:00 UT   05 56 26.1   +28 11 38     4.371    3.464   23.7    6.8   281   14.4 
2025-07-16 00:00 UT   05 57 52.1   +28 11 38     4.364    3.463   24.3    6.9   280   14.5 
2025-07-17 00:00 UT   05 59 17.9   +28 11 35     4.358    3.463   24.9    7.1   280   14.5 
2025-07-18 00:00 UT   06 00 43.5   +28 11 30     4.352    3.463   25.5    7.3   280   14.5 
2025-07-19 00:00 UT   06 02 09.0   +28 11 22     4.345    3.463   26.2    7.4   280   14.5 
2025-07-20 00:00 UT   06 03 34.3   +28 11 12     4.339    3.462   26.8    7.6   280   14.5 
2025-07-21 00:00 UT   06 04 59.4   +28 11 00     4.332    3.462   27.4    7.8   280   14.5 
2025-07-22 00:00 UT   06 06 24.4   +28 10 46     4.325    3.462   28.1    7.9   280   14.5 
2025-07-23 00:00 UT   06 07 49.1   +28 10 29     4.318    3.461   28.7    8.1   280   14.5 
2025-07-24 00:00 UT   06 09 13.6   +28 10 10     4.311    3.461   29.3    8.3   279   14.5 
2025-07-25 00:00 UT   06 10 37.9   +28 09 49     4.303    3.461   30.0    8.4   279   14.5 
2025-07-26 00:00 UT   06 12 02.0   +28 09 26     4.296    3.461   30.6    8.6   279   14.5 
2025-07-27 00:00 UT   06 13 25.9   +28 09 00     4.288    3.460   31.2    8.8   279   14.5 
2025-07-28 00:00 UT   06 14 49.5   +28 08 32     4.280    3.460   31.9    8.9   279   14.5 
2025-07-29 00:00 UT   06 16 12.9   +28 08 03     4.272    3.460   32.5    9.1   279   14.5 
2025-07-30 00:00 UT   06 17 36.0   +28 07 31     4.264    3.459   33.2    9.2   279   14.5 
2025-07-31 00:00 UT   06 18 58.9   +28 06 57     4.256    3.459   33.8    9.4   279   14.5 
2025-08-01 00:00 UT   06 20 21.5   +28 06 20     4.248    3.459   34.5    9.6   279   14.5 
2025-08-02 00:00 UT   06 21 43.9   +28 05 42     4.239    3.458   35.1    9.7   279   14.5 
2025-08-03 00:00 UT   06 23 06.0   +28 05 02     4.230    3.458   35.7    9.9   279   14.5 
2025-08-04 00:00 UT   06 24 27.8   +28 04 20     4.221    3.458   36.4   10.0   279   14.5 
2025-08-05 00:00 UT   06 25 49.3   +28 03 36     4.212    3.457   37.0   10.2   279   14.5 
2025-08-06 00:00 UT   06 27 10.6   +28 02 50     4.203    3.457   37.7   10.3   279   14.5 
2025-08-07 00:00 UT   06 28 31.5   +28 02 02     4.194    3.457   38.4   10.5   279   14.5 
2025-08-08 00:00 UT   06 29 52.2   +28 01 13     4.185    3.456   39.0   10.6   279   14.5 

    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.