(211) Isolda
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 May 2026	13.9	3.495 AU	2.970 AU	19h16m	-21°31'	113.4°	15.3°
Opposition	3 Jul 2026	12.7	3.463 AU	2.446 AU	18h48m	-21°16'	178.3°	0.5°

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 Isolda are:

            e (Eccentricity)                : 0.1545711
            a (Semimajor axis)              : 3.0479707
            i (Inclination)                 : 3.87369
            Ω (Longitude of ascending node) : 263.16469
            ω (Argument of perihelion)      : 173.69648
            M (Mean anomaly)                : 170.99080
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 256.87546
            B (Latitude of perihelion)      : 0.42499
            P (Orbital period in years)     : 5.32            
        

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
2026-05-02 00:00 UT   19 16 45.5   -21 31 25     2.970    3.495  113.4   15.3   262   13.9 
2026-05-02 15:46 UT   19 16 50.5   -21 30 42     2.961    3.495  114.1   15.3   262   13.9 
2026-05-03 00:00 UT   19 16 52.9   -21 30 19     2.956    3.495  114.4   15.2   262   13.9 
2026-05-04 00:00 UT   19 16 59.1   -21 29 15     2.943    3.495  115.3   15.1   262   13.9 
2026-05-05 00:00 UT   19 17 04.1   -21 28 13     2.929    3.494  116.3   15.0   262   13.8 
2026-05-06 00:00 UT   19 17 07.9   -21 27 13     2.915    3.494  117.2   14.9   262   13.8 
2026-05-07 00:00 UT   19 17 10.4   -21 26 15     2.902    3.493  118.2   14.7   262   13.8 
2026-05-08 00:00 UT   19 17 11.7   -21 25 19     2.888    3.493  119.1   14.6   262   13.8 
2026-05-09 00:00 UT   19 17 11.7   -21 24 25     2.875    3.492  120.1   14.5   262   13.8 
2026-05-10 00:00 UT   19 17 10.4   -21 23 32     2.862    3.492  121.1   14.3   262   13.8 
2026-05-11 00:00 UT   19 17 07.9   -21 22 42     2.849    3.492  122.0   14.2   262   13.8 
2026-05-12 00:00 UT   19 17 04.2   -21 21 54     2.836    3.491  123.0   14.0   262   13.7 
2026-05-13 00:00 UT   19 16 59.2   -21 21 07     2.824    3.491  124.0   13.9   262   13.7 
2026-05-14 00:00 UT   19 16 52.9   -21 20 23     2.811    3.490  125.0   13.7   262   13.7 
2026-05-15 00:00 UT   19 16 45.3   -21 19 41     2.799    3.490  126.0   13.6   262   13.7 
2026-05-16 00:00 UT   19 16 36.4   -21 19 00     2.786    3.489  127.0   13.4   262   13.7 
2026-05-17 00:00 UT   19 16 26.3   -21 18 22     2.774    3.489  128.0   13.2   262   13.7 
2026-05-18 00:00 UT   19 16 14.9   -21 17 46     2.762    3.488  129.0   13.0   262   13.6 
2026-05-19 00:00 UT   19 16 02.3   -21 17 12     2.750    3.488  130.0   12.8   262   13.6 
2026-05-20 00:00 UT   19 15 48.4   -21 16 40     2.739    3.487  131.0   12.6   262   13.6 
2026-05-21 00:00 UT   19 15 33.2   -21 16 10     2.727    3.487  132.0   12.4   262   13.6 
2026-05-22 00:00 UT   19 15 16.7   -21 15 41     2.716    3.486  133.1   12.2   262   13.6 
2026-05-23 00:00 UT   19 14 59.1   -21 15 15     2.705    3.486  134.1   12.0   262   13.6 
2026-05-24 00:00 UT   19 14 40.2   -21 14 51     2.694    3.485  135.1   11.8   262   13.5 
2026-05-25 00:00 UT   19 14 20.0   -21 14 28     2.683    3.485  136.2   11.6   262   13.5 
2026-05-26 00:00 UT   19 13 58.7   -21 14 08     2.673    3.484  137.2   11.4   262   13.5 
2026-05-27 00:00 UT   19 13 36.2   -21 13 49     2.662    3.484  138.2   11.2   262   13.5 
2026-05-28 00:00 UT   19 13 12.4   -21 13 32     2.652    3.483  139.3   10.9   262   13.5 
2026-05-29 00:00 UT   19 12 47.5   -21 13 17     2.642    3.483  140.4   10.7   261   13.5 
2026-05-30 00:00 UT   19 12 21.4   -21 13 03     2.632    3.482  141.4   10.5   261   13.4 
2026-05-31 00:00 UT   19 11 54.1   -21 12 51     2.623    3.482  142.5   10.2   261   13.4 
2026-06-01 00:00 UT   19 11 25.7   -21 12 41     2.613    3.481  143.5   10.0   261   13.4 

    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.