(14) Irene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Dec 2025	11.4	2.204 AU	2.848 AU	15h17m	-12°21'	41.1°	17.1°
Opposition	14 Jun 2026	9.4	2.446 AU	1.431 AU	17h34m	-22°41'	178.7°	0.5°

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 Irene are:

            e (Eccentricity)                : 0.1626702
            a (Semimajor axis)              : 2.5878733
            i (Inclination)                 : 9.12955
            Ω (Longitude of ascending node) : 86.00981
            ω (Argument of perihelion)      : 98.26521
            M (Mean anomaly)                : 12.92605
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 4.37957
            B (Latitude of perihelion)      : 9.03393
            P (Orbital period in years)     : 4.16            
        

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
2025-12-23 00:00 UT   15 17 21.3   -12 21 34     2.848    2.204   41.1   17.1   292   11.4 
2025-12-23 07:46 UT   15 17 59.3   -12 24 13     2.846    2.205   41.3   17.1   291   11.4 
2025-12-24 00:00 UT   15 19 18.6   -12 29 44     2.841    2.205   41.6   17.2   291   11.4 
2025-12-25 00:00 UT   15 21 15.7   -12 37 48     2.834    2.206   42.1   17.4   291   11.4 
2025-12-26 00:00 UT   15 23 12.6   -12 45 47     2.827    2.207   42.7   17.6   291   11.4 
2025-12-27 00:00 UT   15 25 09.4   -12 53 39     2.820    2.208   43.2   17.7   290   11.4 
2025-12-28 00:00 UT   15 27 06.0   -13 01 26     2.812    2.209   43.7   17.9   290   11.4 
2025-12-29 00:00 UT   15 29 02.4   -13 09 08     2.805    2.210   44.2   18.1   290   11.4 
2025-12-30 00:00 UT   15 30 58.6   -13 16 43     2.798    2.210   44.7   18.3   290   11.4 
2025-12-31 00:00 UT   15 32 54.6   -13 24 13     2.790    2.211   45.3   18.4   289   11.5 
2026-01-01 00:00 UT   15 34 50.4   -13 31 38     2.783    2.212   45.8   18.6   289   11.5 
2026-01-02 00:00 UT   15 36 46.1   -13 38 56     2.775    2.213   46.3   18.7   289   11.5 
2026-01-03 00:00 UT   15 38 41.5   -13 46 09     2.767    2.214   46.9   18.9   289   11.5 
2026-01-04 00:00 UT   15 40 36.7   -13 53 16     2.759    2.215   47.4   19.1   288   11.5 
2026-01-05 00:00 UT   15 42 31.6   -14 00 17     2.751    2.216   47.9   19.2   288   11.5 
2026-01-06 00:00 UT   15 44 26.4   -14 07 12     2.743    2.217   48.4   19.4   288   11.5 
2026-01-07 00:00 UT   15 46 20.9   -14 14 02     2.735    2.218   49.0   19.5   288   11.4 
2026-01-08 00:00 UT   15 48 15.1   -14 20 46     2.727    2.219   49.5   19.7   287   11.4 
2026-01-09 00:00 UT   15 50 09.1   -14 27 24     2.719    2.220   50.1   19.9   287   11.4 

    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.