(14) Irene
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	1 May 2024	12.0	2.855 AU	3.852 AU	03h01m	+12°50'	7.1°	2.5°
Opposition	2 Jan 2025	9.6	2.458 AU	1.477 AU	06h58m	+27°09'	175.5°	1.8°

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)                : 0.1637349
            a (Semimajor axis)              : 2.5900339
            i (Inclination)                 : 9.12381
            Ω (Longitude of ascending node) : 86.02782
            ω (Argument of perihelion)      : 97.90710
            M (Mean anomaly)                : 231.40028
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 4.03494
            B (Latitude of perihelion)      : 9.03633
            P (Orbital period in years)     : 4.17            
        

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
2024-05-01 00:00 UT   03 01 23.2   +12 50 47     3.852    2.855    7.1    2.5   109   12.0 
2024-05-01 21:59 UT   03 02 47.1   +12 57 52     3.852    2.853    6.7    2.4   111   12.0 
2024-05-02 00:00 UT   03 02 54.8   +12 58 31     3.852    2.853    6.7    2.3   112   12.0 
2024-05-03 00:00 UT   03 04 26.5   +13 06 13     3.852    2.852    6.2    2.2   115   12.0 
2024-05-04 00:00 UT   03 05 58.4   +13 13 52     3.852    2.851    5.8    2.0   119   12.0 
2024-05-05 00:00 UT   03 07 30.4   +13 21 29     3.852    2.850    5.4    1.9   123   12.0 
2024-05-06 00:00 UT   03 09 02.7   +13 29 03     3.852    2.848    5.0    1.8   128   12.0 
2024-05-07 00:00 UT   03 10 35.2   +13 36 33     3.852    2.847    4.7    1.6   134   12.0 
2024-05-08 00:00 UT   03 12 07.8   +13 44 01     3.851    2.846    4.4    1.5   140   12.0 
2024-05-09 00:00 UT   03 13 40.6   +13 51 26     3.851    2.845    4.1    1.5   147   11.9 
2024-05-10 00:00 UT   03 15 13.6   +13 58 48     3.850    2.843    4.0    1.4   155   11.9 
2024-05-11 00:00 UT   03 16 46.8   +14 06 08     3.849    2.842    3.9    1.4   164   11.9 
2024-05-12 00:00 UT   03 18 20.1   +14 13 24     3.848    2.841    3.9    1.4   172   11.9 
2024-05-13 00:00 UT   03 19 53.6   +14 20 37     3.847    2.839    4.0    1.4   180   11.9 
2024-05-14 00:00 UT   03 21 27.2   +14 27 47     3.845    2.838    4.2    1.5   188   11.9 
2024-05-15 00:00 UT   03 23 01.0   +14 34 54     3.844    2.837    4.4    1.6   195   11.9 
2024-05-16 00:00 UT   03 24 35.0   +14 41 57     3.842    2.836    4.7    1.7   201   11.9 
2024-05-17 00:00 UT   03 26 09.1   +14 48 58     3.840    2.834    5.0    1.8   207   12.0 
2024-05-18 00:00 UT   03 27 43.3   +14 55 55     3.838    2.833    5.4    1.9   212   12.0 
2024-05-19 00:00 UT   03 29 17.7   +15 02 50     3.836    2.832    5.8    2.1   216   12.0 
2024-05-20 00:00 UT   03 30 52.2   +15 09 41     3.834    2.830    6.3    2.2   219   12.0 
2024-05-21 00:00 UT   03 32 26.9   +15 16 29     3.832    2.829    6.7    2.4   222   12.0 
2024-05-22 00:00 UT   03 34 01.7   +15 23 13     3.829    2.828    7.2    2.6   225   12.0 

    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.