(176) Iduna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Sep 2026	14.6	3.253 AU	4.036 AU	09h39m	-03°06'	34.1°	10.0°
Opposition	4 Mar 2027	13.6	3.491 AU	2.540 AU	10h31m	-11°37'	160.6°	5.4°

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 Iduna are:

            e (Eccentricity)                : 0.1726084
            a (Semimajor axis)              : 3.1818836
            i (Inclination)                 : 22.67316
            Ω (Longitude of ascending node) : 200.40096
            ω (Argument of perihelion)      : 189.17720
            M (Mean anomaly)                : 69.43397
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 208.87966
            B (Latitude of perihelion)      : -3.52469
            P (Orbital period in years)     : 5.68            
        

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
2026-09-22 00:00 UT   09 39 31.2   -03 06 49     4.036    3.253   34.1   10.0   264   14.6 
2026-09-22 08:54 UT   09 39 58.7   -03 09 27     4.034    3.254   34.3   10.0   265   14.6 
2026-09-23 00:00 UT   09 40 45.3   -03 13 56     4.031    3.255   34.6   10.1   265   14.7 
2026-09-24 00:00 UT   09 41 59.0   -03 21 05     4.025    3.257   35.2   10.2   266   14.7 
2026-09-25 00:00 UT   09 43 12.4   -03 28 15     4.019    3.258   35.7   10.4   266   14.7 
2026-09-26 00:00 UT   09 44 25.4   -03 35 27     4.013    3.260   36.3   10.5   267   14.7 
2026-09-27 00:00 UT   09 45 38.1   -03 42 40     4.007    3.261   36.9   10.6   267   14.7 
2026-09-28 00:00 UT   09 46 50.4   -03 49 55     4.001    3.263   37.4   10.8   268   14.7 
2026-09-29 00:00 UT   09 48 02.4   -03 57 11     3.995    3.265   38.0   10.9   268   14.7 
2026-09-30 00:00 UT   09 49 14.1   -04 04 28     3.989    3.266   38.6   11.0   269   14.7 
2026-10-01 00:00 UT   09 50 25.4   -04 11 46     3.982    3.268   39.2   11.2   270   14.7 
2026-10-02 00:00 UT   09 51 36.3   -04 19 06     3.975    3.269   39.8   11.3   270   14.7 
2026-10-03 00:00 UT   09 52 46.8   -04 26 26     3.969    3.271   40.4   11.4   271   14.7 
2026-10-04 00:00 UT   09 53 57.0   -04 33 48     3.962    3.273   41.0   11.6   271   14.7 
2026-10-05 00:00 UT   09 55 06.8   -04 41 10     3.955    3.274   41.6   11.7   272   14.7 
2026-10-06 00:00 UT   09 56 16.2   -04 48 34     3.947    3.276   42.2   11.8   272   14.7 
2026-10-07 00:00 UT   09 57 25.2   -04 55 58     3.940    3.277   42.8   12.0   272   14.7 
2026-10-08 00:00 UT   09 58 33.8   -05 03 24     3.933    3.279   43.4   12.1   273   14.7 
2026-10-09 00:00 UT   09 59 42.0   -05 10 50     3.925    3.281   44.0   12.2   273   14.7 
2026-10-10 00:00 UT   10 00 49.8   -05 18 16     3.917    3.282   44.6   12.3   274   14.7 
2026-10-11 00:00 UT   10 01 57.2   -05 25 44     3.909    3.284   45.2   12.5   274   14.7 
2026-10-12 00:00 UT   10 03 04.2   -05 33 12     3.901    3.285   45.9   12.6   275   14.7 
2026-10-13 00:00 UT   10 04 10.7   -05 40 40     3.893    3.287   46.5   12.7   275   14.7 
2026-10-14 00:00 UT   10 05 16.7   -05 48 09     3.885    3.288   47.1   12.8   275   14.7 
2026-10-15 00:00 UT   10 06 22.4   -05 55 38     3.877    3.290   47.7   13.0   276   14.7 
2026-10-16 00:00 UT   10 07 27.5   -06 03 07     3.868    3.292   48.4   13.1   276   14.7 
2026-10-17 00:00 UT   10 08 32.3   -06 10 37     3.860    3.293   49.0   13.2   277   14.7 
2026-10-18 00:00 UT   10 09 36.5   -06 18 06     3.851    3.295   49.7   13.3   277   14.7 
2026-10-19 00:00 UT   10 10 40.3   -06 25 36     3.842    3.296   50.3   13.4   277   14.7 

    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.