(176) Iduna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Oct 2025	13.3	2.727 AU	2.176 AU	05h50m	+01°59'	113.2°	19.6°
Opposition	12 Dec 2025	12.7	2.797 AU	1.901 AU	05h28m	-06°54'	149.9°	10.2°

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
2025-10-16 00:00 UT   05 50 50.9   +01 59 58     2.176    2.727  113.2   19.6   279   13.3 
2025-10-16 20:50 UT   05 51 04.3   +01 50 13     2.167    2.728  113.9   19.5   279   13.3 
2025-10-17 00:00 UT   05 51 06.3   +01 48 43     2.166    2.728  114.0   19.5   279   13.3 
2025-10-18 00:00 UT   05 51 20.1   +01 37 26     2.157    2.729  114.8   19.4   280   13.3 
2025-10-19 00:00 UT   05 51 32.5   +01 26 07     2.147    2.730  115.6   19.2   280   13.3 
2025-10-20 00:00 UT   05 51 43.3   +01 14 47     2.138    2.731  116.4   19.1   281   13.2 
2025-10-21 00:00 UT   05 51 52.5   +01 03 25     2.129    2.732  117.3   18.9   281   13.2 
2025-10-22 00:00 UT   05 52 00.3   +00 52 02     2.120    2.733  118.1   18.7   282   13.2 
2025-10-23 00:00 UT   05 52 06.5   +00 40 39     2.111    2.734  118.9   18.6   283   13.2 
2025-10-24 00:00 UT   05 52 11.2   +00 29 15     2.102    2.735  119.7   18.4   283   13.2 
2025-10-25 00:00 UT   05 52 14.3   +00 17 51     2.093    2.737  120.6   18.2   284   13.2 
2025-10-26 00:00 UT   05 52 15.8   +00 06 27     2.085    2.738  121.4   18.1   284   13.2 
2025-10-27 00:00 UT   05 52 15.8   +00 04 56     2.076    2.739  122.2   17.9   285   13.1 
2025-10-28 00:00 UT   05 52 14.3   +00 16 18     2.068    2.740  123.1   17.7   286   13.1 
2025-10-29 00:00 UT   05 52 11.2   +00 27 40     2.060    2.741  123.9   17.5   286   13.1 
2025-10-30 00:00 UT   05 52 06.6   +00 38 59     2.052    2.742  124.7   17.3   287   13.1 
2025-10-31 00:00 UT   05 52 00.5   +00 50 17     2.044    2.743  125.6   17.1   288   13.1 
2025-11-01 00:00 UT   05 51 52.8   -01 01 33     2.037    2.745  126.4   16.9   289   13.1 
2025-11-02 00:00 UT   05 51 43.5   -01 12 46     2.029    2.746  127.2   16.7   289   13.1 
2025-11-03 00:00 UT   05 51 32.8   -01 23 57     2.022    2.747  128.1   16.5   290   13.0 
2025-11-04 00:00 UT   05 51 20.6   -01 35 04     2.015    2.748  128.9   16.3   291   13.0 
2025-11-05 00:00 UT   05 51 06.8   -01 46 07     2.008    2.749  129.7   16.1   292   13.0 
2025-11-06 00:00 UT   05 50 51.6   -01 57 07     2.001    2.751  130.5   15.9   293   13.0 
2025-11-07 00:00 UT   05 50 34.9   -02 08 03     1.994    2.752  131.4   15.7   294   13.0 
2025-11-08 00:00 UT   05 50 16.7   -02 18 53     1.988    2.753  132.2   15.5   295   13.0 
2025-11-09 00:00 UT   05 49 57.0   -02 29 39     1.982    2.754  133.0   15.3   296   13.0 
2025-11-10 00:00 UT   05 49 35.9   -02 40 19     1.976    2.755  133.8   15.0   297   13.0 
2025-11-11 00:00 UT   05 49 13.3   -02 50 53     1.970    2.757  134.6   14.8   298   12.9 
2025-11-12 00:00 UT   05 48 49.4   -03 01 21     1.964    2.758  135.4   14.6   299   12.9 
2025-11-13 00:00 UT   05 48 24.0   -03 11 43     1.959    2.759  136.1   14.4   300   12.9 
2025-11-14 00:00 UT   05 47 57.3   -03 21 57     1.954    2.760  136.9   14.2   301   12.9 
2025-11-15 00:00 UT   05 47 29.2   -03 32 03     1.949    2.761  137.7   14.0   302   12.9 

    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.