(14) Irene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Oct 2025	11.1	2.168 AU	3.152 AU	12h50m	+01°13'	8.2°	3.8°
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. 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
2025-10-10 00:00 UT   12 50 34.6   +01 13 09     3.152    2.168    8.2    3.8   341   11.1 
2025-10-10 04:38 UT   12 50 57.5   +01 10 40     3.151    2.168    8.2    3.8   341   11.1 
2025-10-11 00:00 UT   12 52 33.4   +01 00 15     3.150    2.168    8.5    3.9   339   11.1 
2025-10-12 00:00 UT   12 54 32.2   +00 47 21     3.149    2.168    8.8    4.0   337   11.1 
2025-10-13 00:00 UT   12 56 31.0   +00 34 30     3.148    2.168    9.1    4.2   335   11.1 
2025-10-14 00:00 UT   12 58 29.9   +00 21 40     3.146    2.168    9.4    4.3   333   11.1 
2025-10-15 00:00 UT   13 00 28.7   +00 08 51     3.145    2.168    9.8    4.5   331   11.1 
2025-10-16 00:00 UT   13 02 27.6   +00 03 55     3.143    2.169   10.1    4.6   329   11.1 
2025-10-17 00:00 UT   13 04 26.6   +00 16 40     3.141    2.169   10.5    4.8   328   11.1 
2025-10-18 00:00 UT   13 06 25.5   +00 29 23     3.140    2.169   10.9    5.0   326   11.1 
2025-10-19 00:00 UT   13 08 24.5   +00 42 04     3.138    2.169   11.2    5.1   325   11.1 
2025-10-20 00:00 UT   13 10 23.5   +00 54 42     3.136    2.170   11.6    5.3   324   11.1 
2025-10-21 00:00 UT   13 12 22.6   -01 07 19     3.134    2.170   12.0    5.5   322   11.1 
2025-10-22 00:00 UT   13 14 21.6   -01 19 53     3.132    2.170   12.4    5.6   321   11.2 
2025-10-23 00:00 UT   13 16 20.7   -01 32 25     3.129    2.170   12.8    5.8   320   11.2 
2025-10-24 00:00 UT   13 18 19.8   -01 44 55     3.127    2.171   13.2    6.0   319   11.2 
2025-10-25 00:00 UT   13 20 18.9   -01 57 22     3.125    2.171   13.6    6.2   318   11.2 

    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.