(498) Tokio
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	25 Apr 2024	14.7	2.897 AU	3.381 AU	05h52m	+24°29'	53.4°	16.2°
Opposition	21 Feb 2025	13.5	3.240 AU	2.264 AU	10h39m	+20°46'	168.6°	3.5°

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 Tokio are:

            e (Eccentricity)                : 0.2239364
            a (Semimajor axis)              : 2.6503268
            i (Inclination)                 : 9.50179
            Ω (Longitude of ascending node) : 97.14964
            ω (Argument of perihelion)      : 241.74938
            M (Mean anomaly)                : 97.12664
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 158.56774
            B (Latitude of perihelion)      : -8.36132
            P (Orbital period in years)     : 4.31            
        

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
2024-04-25 00:00 UT   05 52 48.8   +24 29 17     3.381    2.897   53.4   16.2    88   14.7 
2024-04-25 23:27 UT   05 54 13.8   +24 30 50     3.394    2.898   52.8   16.1    89   14.7 
2024-04-26 00:00 UT   05 54 15.8   +24 30 52     3.394    2.899   52.8   16.0    89   14.7 
2024-04-27 00:00 UT   05 55 43.1   +24 32 23     3.407    2.900   52.1   15.9    89   14.7 
2024-04-28 00:00 UT   05 57 10.7   +24 33 51     3.420    2.902   51.5   15.8    89   14.7 
2024-04-29 00:00 UT   05 58 38.7   +24 35 15     3.433    2.904   50.9   15.6    89   14.7 
2024-04-30 00:00 UT   06 00 07.1   +24 36 36     3.446    2.906   50.2   15.4    89   14.7 
2024-05-01 00:00 UT   06 01 35.7   +24 37 53     3.458    2.908   49.6   15.3    89   14.7 
2024-05-02 00:00 UT   06 03 04.7   +24 39 06     3.471    2.910   49.0   15.1    89   14.7 
2024-05-03 00:00 UT   06 04 34.0   +24 40 16     3.483    2.912   48.3   15.0    89   14.7 
2024-05-04 00:00 UT   06 06 03.6   +24 41 22     3.496    2.914   47.7   14.8    89   14.7 
2024-05-05 00:00 UT   06 07 33.5   +24 42 25     3.508    2.916   47.1   14.7    90   14.8 
2024-05-06 00:00 UT   06 09 03.6   +24 43 24     3.520    2.918   46.4   14.5    90   14.8 
2024-05-07 00:00 UT   06 10 34.1   +24 44 19     3.532    2.920   45.8   14.3    90   14.8 
2024-05-08 00:00 UT   06 12 04.8   +24 45 10     3.544    2.922   45.2   14.2    90   14.8 
2024-05-09 00:00 UT   06 13 35.8   +24 45 58     3.556    2.924   44.6   14.0    90   14.8 
2024-05-10 00:00 UT   06 15 07.1   +24 46 42     3.567    2.926   43.9   13.9    90   14.8 
2024-05-11 00:00 UT   06 16 38.6   +24 47 22     3.579    2.927   43.3   13.7    90   14.8 
2024-05-12 00:00 UT   06 18 10.3   +24 47 58     3.590    2.929   42.7   13.5    90   14.8 
2024-05-13 00:00 UT   06 19 42.2   +24 48 31     3.602    2.931   42.1   13.4    90   14.8 
2024-05-14 00:00 UT   06 21 14.4   +24 48 59     3.613    2.933   41.5   13.2    90   14.8 
2024-05-15 00:00 UT   06 22 46.8   +24 49 24     3.624    2.935   40.9   13.0    91   14.8 
2024-05-16 00:00 UT   06 24 19.4   +24 49 46     3.635    2.937   40.2   12.9    91   14.8 
2024-05-17 00:00 UT   06 25 52.1   +24 50 03     3.646    2.939   39.6   12.7    91   14.8 
2024-05-18 00:00 UT   06 27 25.1   +24 50 17     3.657    2.941   39.0   12.5    91   14.8 
2024-05-19 00:00 UT   06 28 58.2   +24 50 27     3.667    2.942   38.4   12.3    91   14.8 

    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.