(85) Io
ephemeris date magn radius delta ra dec elong phase
Opposition2 May 202411.52.674 AU1.670 AU14h47m-09°25'173.6°2.4°
Today21 May 202411.82.636 AU1.676 AU14h32m-07°01'156.7°8.7°
(85) Io - 2024-05-21
astro.vanbuitenen.nl


 
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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 Io are:

            e (Eccentricity)                : 0.1934592
            a (Semimajor axis)              : 2.6539192
            i (Inclination)                 : 11.96096
            Ω (Longitude of ascending node) : 203.05085
            ω (Argument of perihelion)      : 122.88771
            M (Mean anomaly)                : 271.47645
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 146.51456
            B (Latitude of perihelion)      : 10.02229
            P (Orbital period in years)     : 4.32            
        

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. 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
2024-05-21 00:00 UT   14 32 11.8   -07 01 29     1.676    2.636  156.7    8.7   126   11.8 
2024-05-21 09:59 UT   14 31 53.9   -06 58 42     1.677    2.635  156.2    8.9   126   11.8 
2024-05-22 00:00 UT   14 31 29.0   -06 54 50     1.679    2.634  155.6    9.2   125   11.8 
2024-05-23 00:00 UT   14 30 47.1   -06 48 20     1.682    2.632  154.4    9.6   125   11.8 
2024-05-24 00:00 UT   14 30 06.2   -06 42 00     1.685    2.630  153.3   10.0   124   11.8 
2024-05-25 00:00 UT   14 29 26.3   -06 35 49     1.689    2.628  152.2   10.4   124   11.9 
2024-05-26 00:00 UT   14 28 47.5   -06 29 49     1.693    2.625  151.1   10.7   123   11.9 
2024-05-27 00:00 UT   14 28 09.8   -06 23 58     1.697    2.623  150.0   11.1   122   11.9 
2024-05-28 00:00 UT   14 27 33.1   -06 18 18     1.701    2.621  148.9   11.5   122   11.9 
2024-05-29 00:00 UT   14 26 57.6   -06 12 48     1.705    2.619  147.8   11.9   121   11.9 
2024-05-30 00:00 UT   14 26 23.3   -06 07 28     1.710    2.617  146.7   12.3   121   11.9 
2024-05-31 00:00 UT   14 25 50.3   -06 02 20     1.715    2.615  145.6   12.6   121   12.0 
2024-06-01 00:00 UT   14 25 18.4   -05 57 23     1.720    2.613  144.5   13.0   120   12.0 
2024-06-02 00:00 UT   14 24 47.9   -05 52 36     1.726    2.611  143.4   13.4   120   12.0 
2024-06-03 00:00 UT   14 24 18.7   -05 48 01     1.731    2.609  142.4   13.7   120   12.0 
2024-06-04 00:00 UT   14 23 50.8   -05 43 38     1.737    2.607  141.3   14.1   119   12.0 
2024-06-05 00:00 UT   14 23 24.3   -05 39 26     1.743    2.605  140.2   14.4   119   12.1 
2024-06-06 00:00 UT   14 22 59.1   -05 35 25     1.749    2.603  139.2   14.8   119   12.1 
2024-06-07 00:00 UT   14 22 35.4   -05 31 36     1.755    2.601  138.1   15.1   118   12.1 
2024-06-08 00:00 UT   14 22 13.1   -05 27 59     1.762    2.599  137.1   15.4   118   12.1 
2024-06-09 00:00 UT   14 21 52.3   -05 24 34     1.768    2.597  136.0   15.7   118   12.1 
2024-06-10 00:00 UT   14 21 32.9   -05 21 20     1.775    2.594  135.0   16.1   117   12.1 
2024-06-11 00:00 UT   14 21 15.0   -05 18 18     1.782    2.592  134.0   16.4   117   12.2 
2024-06-12 00:00 UT   14 20 58.6   -05 15 28     1.789    2.590  133.0   16.7   117   12.2 
2024-06-13 00:00 UT   14 20 43.7   -05 12 49     1.797    2.588  131.9   17.0   117   12.2 
2024-06-14 00:00 UT   14 20 30.2   -05 10 22     1.804    2.586  130.9   17.3   117   12.2 
2024-06-15 00:00 UT   14 20 18.3   -05 08 07     1.812    2.584  129.9   17.5   116   12.2 
2024-06-16 00:00 UT   14 20 07.9   -05 06 03     1.820    2.582  129.0   17.8   116   12.2 
2024-06-17 00:00 UT   14 19 59.1   -05 04 11     1.827    2.580  128.0   18.1   116   12.3 
2024-06-18 00:00 UT   14 19 51.7   -05 02 30     1.835    2.578  127.0   18.3   116   12.3 
2024-06-19 00:00 UT   14 19 45.9   -05 00 60     1.844    2.576  126.0   18.6   115   12.3 
2024-06-20 00:00 UT   14 19 41.5   -04 59 41     1.852    2.574  125.1   18.9   115   12.3 


    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.