(176) Iduna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Jul 2026	14.4	3.152 AU	4.106 AU	08h16m	+02°47'	17.5°	5.6°
Opposition	4 Mar 2027	13.6	3.490 AU	2.539 AU	10h31m	-11°39'	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)                : 0.1722468
            a (Semimajor axis)              : 3.1802398
            i (Inclination)                 : 22.67613
            Ω (Longitude of ascending node) : 200.45174
            ω (Argument of perihelion)      : 189.02649
            M (Mean anomaly)                : 34.81371
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 208.79068
            B (Latitude of perihelion)      : -3.46765
            P (Orbital period in years)     : 5.67            
        

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
2026-07-23 00:00 UT   08 16 19.6   +02 47 16     4.106    3.152   17.5    5.6   173   14.4 
2026-07-23 23:55 UT   08 17 46.5   +02 43 10     4.109    3.154   17.3    5.5   175   14.4 
2026-07-24 00:00 UT   08 17 46.8   +02 43 09     4.109    3.154   17.3    5.5   175   14.4 
2026-07-25 00:00 UT   08 19 13.9   +02 38 59     4.112    3.156   17.1    5.4   177   14.4 
2026-07-26 00:00 UT   08 20 40.8   +02 34 44     4.115    3.157   17.0    5.4   179   14.4 
2026-07-27 00:00 UT   08 22 07.6   +02 30 25     4.117    3.159   16.8    5.3   181   14.4 
2026-07-28 00:00 UT   08 23 34.3   +02 26 02     4.120    3.161   16.7    5.3   183   14.4 
2026-07-29 00:00 UT   08 25 00.9   +02 21 35     4.122    3.162   16.6    5.3   186   14.4 
2026-07-30 00:00 UT   08 26 27.3   +02 17 04     4.124    3.164   16.5    5.2   188   14.4 
2026-07-31 00:00 UT   08 27 53.7   +02 12 30     4.126    3.166   16.4    5.2   190   14.4 
2026-08-01 00:00 UT   08 29 19.8   +02 07 51     4.128    3.167   16.4    5.2   192   14.4 
2026-08-02 00:00 UT   08 30 45.9   +02 03 08     4.130    3.169   16.4    5.2   194   14.4 
2026-08-03 00:00 UT   08 32 11.8   +01 58 22     4.131    3.171   16.4    5.2   196   14.4 
2026-08-04 00:00 UT   08 33 37.5   +01 53 32     4.133    3.172   16.4    5.2   198   14.4 
2026-08-05 00:00 UT   08 35 03.2   +01 48 38     4.134    3.174   16.4    5.2   201   14.4 
2026-08-06 00:00 UT   08 36 28.6   +01 43 40     4.135    3.176   16.4    5.2   203   14.4 
2026-08-07 00:00 UT   08 37 53.9   +01 38 38     4.137    3.177   16.5    5.2   205   14.4 
2026-08-08 00:00 UT   08 39 19.1   +01 33 33     4.137    3.179   16.6    5.2   207   14.4 
2026-08-09 00:00 UT   08 40 44.1   +01 28 24     4.138    3.181   16.7    5.3   209   14.4 
2026-08-10 00:00 UT   08 42 09.0   +01 23 12     4.139    3.182   16.8    5.3   211   14.4 
2026-08-11 00:00 UT   08 43 33.6   +01 17 56     4.139    3.184   17.0    5.3   213   14.4 
2026-08-12 00:00 UT   08 44 58.1   +01 12 36     4.140    3.186   17.2    5.4   215   14.5 
2026-08-13 00:00 UT   08 46 22.5   +01 07 13     4.140    3.187   17.3    5.4   217   14.5 
2026-08-14 00:00 UT   08 47 46.6   +01 01 47     4.140    3.189   17.5    5.5   219   14.5 
2026-08-15 00:00 UT   08 49 10.6   +00 56 17     4.140    3.191   17.8    5.6   221   14.5 

    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.