(173) Ino
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	14 May 2026	12.6	3.149 AU	2.183 AU	15h44m	+01°24'	159.4°	6.5°
Today	17 May 2026	12.6	3.146 AU	2.180 AU	15h42m	+01°33'	159.1°	6.6°

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 Ino are:

            e (Eccentricity)                : 0.2095126
            a (Semimajor axis)              : 2.7416584
            i (Inclination)                 : 14.19489
            Ω (Longitude of ascending node) : 148.12337
            ω (Argument of perihelion)      : 228.56304
            M (Mean anomaly)                : 195.38040
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 195.80338
            B (Latitude of perihelion)      : -10.59341
            P (Orbital period in years)     : 4.54            
        

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
2026-05-17 00:00 UT   15 42 21.0   +01 33 01     2.180    3.146  159.1    6.6   186   12.6 
2026-05-17 06:43 UT   15 42 07.1   +01 33 57     2.180    3.145  159.1    6.6   185   12.6 
2026-05-18 00:00 UT   15 41 31.1   +01 36 15     2.180    3.144  159.0    6.6   183   12.6 
2026-05-19 00:00 UT   15 40 41.1   +01 39 19     2.179    3.143  158.7    6.7   179   12.6 
2026-05-20 00:00 UT   15 39 51.2   +01 42 14     2.179    3.142  158.4    6.8   176   12.6 
2026-05-21 00:00 UT   15 39 01.2   +01 44 58     2.179    3.140  158.0    6.9   173   12.6 
2026-05-22 00:00 UT   15 38 11.4   +01 47 33     2.179    3.139  157.6    7.1   170   12.6 
2026-05-23 00:00 UT   15 37 21.7   +01 49 58     2.180    3.138  157.2    7.2   168   12.6 
2026-05-24 00:00 UT   15 36 32.2   +01 52 12     2.181    3.136  156.6    7.4   165   12.6 
2026-05-25 00:00 UT   15 35 42.9   +01 54 16     2.182    3.135  156.1    7.5   162   12.6 
2026-05-26 00:00 UT   15 34 53.9   +01 56 09     2.184    3.134  155.5    7.7   160   12.6 
2026-05-27 00:00 UT   15 34 05.2   +01 57 52     2.185    3.132  154.9    7.9   158   12.6 
2026-05-28 00:00 UT   15 33 16.9   +01 59 25     2.187    3.131  154.2    8.1   156   12.7 
2026-05-29 00:00 UT   15 32 29.0   +02 00 46     2.189    3.129  153.5    8.3   153   12.7 
2026-05-30 00:00 UT   15 31 41.6   +02 01 58     2.192    3.128  152.8    8.5   151   12.7 
2026-05-31 00:00 UT   15 30 54.6   +02 02 58     2.195    3.126  152.1    8.7   150   12.7 
2026-06-01 00:00 UT   15 30 08.2   +02 03 48     2.197    3.125  151.3    9.0   148   12.7 
2026-06-02 00:00 UT   15 29 22.3   +02 04 27     2.201    3.124  150.5    9.2   146   12.7 
2026-06-03 00:00 UT   15 28 37.1   +02 04 55     2.204    3.122  149.7    9.4   144   12.7 
2026-06-04 00:00 UT   15 27 52.5   +02 05 13     2.208    3.121  148.9    9.7   143   12.7 
2026-06-05 00:00 UT   15 27 08.6   +02 05 20     2.212    3.119  148.1    9.9   141   12.7 
2026-06-06 00:00 UT   15 26 25.4   +02 05 16     2.216    3.118  147.3   10.1   140   12.8 
2026-06-07 00:00 UT   15 25 42.9   +02 05 01     2.220    3.116  146.4   10.4   139   12.8 
2026-06-08 00:00 UT   15 25 01.3   +02 04 36     2.225    3.115  145.5   10.6   138   12.8 
2026-06-09 00:00 UT   15 24 20.5   +02 03 60     2.230    3.114  144.7   10.9   136   12.8 
2026-06-10 00:00 UT   15 23 40.5   +02 03 13     2.235    3.112  143.8   11.1   135   12.8 
2026-06-11 00:00 UT   15 23 01.4   +02 02 16     2.240    3.111  142.9   11.4   134   12.8 
2026-06-12 00:00 UT   15 22 23.2   +02 01 08     2.246    3.109  142.0   11.6   133   12.8 
2026-06-13 00:00 UT   15 21 46.0   +01 59 50     2.251    3.108  141.1   11.8   132   12.9 
2026-06-14 00:00 UT   15 21 09.8   +01 58 22     2.257    3.106  140.2   12.1   131   12.9 
2026-06-15 00:00 UT   15 20 34.5   +01 56 43     2.263    3.105  139.3   12.3   130   12.9 
2026-06-16 00:00 UT   15 20 00.3   +01 54 54     2.270    3.103  138.4   12.6   129   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.