(14) Irene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Oct 2026	12.0	2.664 AU	2.857 AU	18h13m	-27°21'	68.8°	20.4°
Opposition	21 Sep 2027	10.9	3.006 AU	2.021 AU	00h15m	-13°15'	166.4°	4.5°

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)                : 0.1627828
            a (Semimajor axis)              : 2.5883491
            i (Inclination)                 : 9.12924
            Ω (Longitude of ascending node) : 86.01072
            ω (Argument of perihelion)      : 98.30619
            M (Mean anomaly)                : 60.22804
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 4.42196
            B (Latitude of perihelion)      : 9.03267
            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
2026-10-18 00:00 UT   18 13 39.3   -27 21 31     2.857    2.664   68.8   20.4    90   12.0 
2026-10-18 12:33 UT   18 14 26.3   -27 21 38     2.864    2.665   68.5   20.4    90   12.0 
2026-10-19 00:00 UT   18 15 09.4   -27 21 44     2.871    2.666   68.2   20.3    90   12.0 
2026-10-20 00:00 UT   18 16 40.0   -27 21 53     2.885    2.668   67.5   20.2    90   12.0 
2026-10-21 00:00 UT   18 18 11.2   -27 21 59     2.899    2.669   66.9   20.1    90   12.0 
2026-10-22 00:00 UT   18 19 42.8   -27 22 00     2.912    2.671   66.2   19.9    90   12.0 
2026-10-23 00:00 UT   18 21 15.0   -27 21 58     2.926    2.673   65.6   19.8    90   12.0 
2026-10-24 00:00 UT   18 22 47.7   -27 21 52     2.940    2.674   64.9   19.7    90   12.0 
2026-10-25 00:00 UT   18 24 20.8   -27 21 42     2.953    2.676   64.3   19.6    90   12.0 
2026-10-26 00:00 UT   18 25 54.4   -27 21 29     2.967    2.678   63.6   19.4    89   12.0 
2026-10-27 00:00 UT   18 27 28.5   -27 21 11     2.980    2.679   63.0   19.3    89   12.0 
2026-10-28 00:00 UT   18 29 03.0   -27 20 49     2.994    2.681   62.3   19.2    89   12.0 
2026-10-29 00:00 UT   18 30 38.0   -27 20 24     3.007    2.683   61.7   19.0    89   12.0 
2026-10-30 00:00 UT   18 32 13.4   -27 19 54     3.020    2.684   61.0   18.9    89   12.0 
2026-10-31 00:00 UT   18 33 49.2   -27 19 20     3.034    2.686   60.4   18.8    89   12.1 
2026-11-01 00:00 UT   18 35 25.4   -27 18 42     3.047    2.688   59.8   18.6    89   12.1 
2026-11-02 00:00 UT   18 37 02.0   -27 18 00     3.060    2.689   59.1   18.5    89   12.1 
2026-11-03 00:00 UT   18 38 39.0   -27 17 14     3.073    2.691   58.5   18.3    89   12.1 
2026-11-04 00:00 UT   18 40 16.5   -27 16 24     3.086    2.692   57.9   18.2    89   12.1 
2026-11-05 00:00 UT   18 41 54.2   -27 15 29     3.099    2.694   57.2   18.0    89   12.1 
2026-11-06 00:00 UT   18 43 32.4   -27 14 31     3.111    2.696   56.6   17.9    88   12.1 
2026-11-07 00:00 UT   18 45 10.9   -27 13 28     3.124    2.697   55.9   17.7    88   12.1 
2026-11-08 00:00 UT   18 46 49.8   -27 12 20     3.137    2.699   55.3   17.6    88   12.1 
2026-11-09 00:00 UT   18 48 29.0   -27 11 09     3.149    2.700   54.7   17.4    88   12.1 
2026-11-10 00:00 UT   18 50 08.5   -27 09 53     3.162    2.702   54.0   17.3    88   12.1 
2026-11-11 00:00 UT   18 51 48.4   -27 08 33     3.174    2.704   53.4   17.1    88   12.1 

    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.