(85) Io
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	8 Nov 2026	13.5	3.023 AU	2.749 AU	08h30m	+05°22'	96.3°	19.0°
Opposition	22 Jan 2027	12.5	3.102 AU	2.148 AU	08h03m	+02°50'	162.8°	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 Io are:

            e (Eccentricity)                : 0.1929890
            a (Semimajor axis)              : 2.6535067
            i (Inclination)                 : 11.95949
            Ω (Longitude of ascending node) : 203.03594
            ω (Argument of perihelion)      : 122.96267
            M (Mean anomaly)                : 93.83602
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 146.57513
            B (Latitude of perihelion)      : 10.01249
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-11-08 00:00 UT   08 30 55.5   +05 22 03     2.749    3.023   96.3   19.0   286   13.5 
2026-11-08 15:18 UT   08 31 11.1   +05 18 18     2.741    3.024   96.9   19.0   286   13.5 
2026-11-09 00:00 UT   08 31 19.8   +05 16 10     2.736    3.024   97.2   19.0   286   13.5 
2026-11-10 00:00 UT   08 31 42.9   +05 10 19     2.724    3.025   98.0   18.9   286   13.5 
2026-11-11 00:00 UT   08 32 04.8   +05 04 31     2.711    3.027   98.9   18.9   287   13.5 
2026-11-12 00:00 UT   08 32 25.5   +04 58 47     2.698    3.028   99.8   18.8   287   13.4 
2026-11-13 00:00 UT   08 32 44.9   +04 53 05     2.686    3.029  100.6   18.7   287   13.4 
2026-11-14 00:00 UT   08 33 03.1   +04 47 27     2.673    3.030  101.5   18.7   287   13.4 
2026-11-15 00:00 UT   08 33 20.1   +04 41 52     2.661    3.031  102.4   18.6   288   13.4 
2026-11-16 00:00 UT   08 33 35.8   +04 36 22     2.649    3.033  103.3   18.5   288   13.4 
2026-11-17 00:00 UT   08 33 50.2   +04 30 54     2.636    3.034  104.2   18.4   288   13.4 
2026-11-18 00:00 UT   08 34 03.4   +04 25 31     2.624    3.035  105.1   18.3   289   13.4 
2026-11-19 00:00 UT   08 34 15.3   +04 20 12     2.612    3.036  106.0   18.2   289   13.4 
2026-11-20 00:00 UT   08 34 25.8   +04 14 57     2.600    3.037  106.9   18.1   289   13.3 
2026-11-21 00:00 UT   08 34 35.1   +04 09 47     2.587    3.039  107.8   18.0   289   13.3 
2026-11-22 00:00 UT   08 34 43.0   +04 04 40     2.575    3.040  108.7   17.9   290   13.3 
2026-11-23 00:00 UT   08 34 49.7   +03 59 39     2.563    3.041  109.6   17.8   290   13.3 
2026-11-24 00:00 UT   08 34 55.0   +03 54 42     2.552    3.042  110.5   17.7   290   13.3 
2026-11-25 00:00 UT   08 34 58.9   +03 49 51     2.540    3.043  111.5   17.6   291   13.3 
2026-11-26 00:00 UT   08 35 01.5   +03 45 04     2.528    3.044  112.4   17.4   291   13.3 
2026-11-27 00:00 UT   08 35 02.8   +03 40 22     2.516    3.045  113.4   17.3   291   13.3 
2026-11-28 00:00 UT   08 35 02.7   +03 35 46     2.505    3.047  114.3   17.2   292   13.2 
2026-11-29 00:00 UT   08 35 01.2   +03 31 16     2.493    3.048  115.2   17.0   292   13.2 
2026-11-30 00:00 UT   08 34 58.3   +03 26 51     2.482    3.049  116.2   16.9   292   13.2 
2026-12-01 00:00 UT   08 34 54.0   +03 22 33     2.471    3.050  117.2   16.7   293   13.2 
2026-12-02 00:00 UT   08 34 48.4   +03 18 20     2.460    3.051  118.1   16.6   293   13.2 
2026-12-03 00:00 UT   08 34 41.3   +03 14 13     2.449    3.052  119.1   16.4   293   13.2 
2026-12-04 00:00 UT   08 34 32.9   +03 10 14     2.438    3.053  120.1   16.2   294   13.2 
2026-12-05 00:00 UT   08 34 23.0   +03 06 20     2.427    3.054  121.0   16.0   294   13.1 
2026-12-06 00:00 UT   08 34 11.8   +03 02 34     2.416    3.056  122.0   15.9   295   13.1 
2026-12-07 00:00 UT   08 33 59.1   +02 58 54     2.406    3.057  123.0   15.7   295   13.1 
2026-12-08 00:00 UT   08 33 45.1   +02 55 22     2.396    3.058  124.0   15.5   296   13.1 

    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.