(438908) 2009 XO
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 May 2026	26.3	2.811 AU	3.250 AU	23h42m	-02°11'	55.9°	17.3°

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 2009 XO are:

            e (Eccentricity)                : 0.5433821
            a (Semimajor axis)              : 1.8591255
            i (Inclination)                 : 0.34850
            Ω (Longitude of ascending node) : 27.93271
            ω (Argument of perihelion)      : 140.52600
            M (Mean anomaly)                : 83.10090
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -11.54077
            B (Latitude of perihelion)      : 0.22155
            P (Orbital period in years)     : 2.53            
        

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
2026-05-12 00:00 UT   23 42 09.4   -02 11 05     3.250    2.811   55.9   17.3   246   26.3 
2026-05-12 23:26 UT   23 43 09.8   -02 04 35     3.240    2.812   56.6   17.4   246   26.3 
2026-05-13 00:00 UT   23 43 11.2   -02 04 25     3.239    2.812   56.6   17.4   246   26.3 
2026-05-14 00:00 UT   23 44 12.6   -01 57 49     3.229    2.814   57.3   17.6   246   26.3 
2026-05-15 00:00 UT   23 45 13.5   -01 51 16     3.218    2.815   58.0   17.7   246   26.3 
2026-05-16 00:00 UT   23 46 13.9   -01 44 46     3.207    2.817   58.6   17.8   246   26.3 
2026-05-17 00:00 UT   23 47 13.7   -01 38 20     3.196    2.818   59.3   18.0   246   26.3 
2026-05-18 00:00 UT   23 48 13.0   -01 31 57     3.185    2.820   60.0   18.1   246   26.3 
2026-05-19 00:00 UT   23 49 11.7   -01 25 37     3.174    2.821   60.7   18.2   246   26.3 
2026-05-20 00:00 UT   23 50 09.9   -01 19 22     3.163    2.822   61.4   18.4   246   26.3 
2026-05-21 00:00 UT   23 51 07.5   -01 13 09     3.151    2.824   62.1   18.5   246   26.3 
2026-05-22 00:00 UT   23 52 04.6   -01 07 00     3.140    2.825   62.8   18.6   246   26.3 
2026-05-23 00:00 UT   23 53 01.0   -01 00 55     3.128    2.826   63.5   18.7   246   26.3 
2026-05-24 00:00 UT   23 53 56.9   +00 54 54     3.116    2.828   64.2   18.8   246   26.3 
2026-05-25 00:00 UT   23 54 52.2   +00 48 56     3.105    2.829   65.0   18.9   246   26.3 
2026-05-26 00:00 UT   23 55 47.0   +00 43 03     3.093    2.830   65.7   19.0   246   26.3 
2026-05-27 00:00 UT   23 56 41.1   +00 37 13     3.081    2.831   66.4   19.1   246   26.3 
2026-05-28 00:00 UT   23 57 34.6   +00 31 27     3.069    2.833   67.1   19.2   246   26.3 
2026-05-29 00:00 UT   23 58 27.4   +00 25 46     3.056    2.834   67.8   19.3   246   26.3 
2026-05-30 00:00 UT   23 59 19.7   +00 20 08     3.044    2.835   68.5   19.4   246   26.3 
2026-05-31 00:00 UT   00 00 11.3   +00 14 34     3.032    2.836   69.3   19.5   246   26.3 
2026-06-01 00:00 UT   00 01 02.3   +00 09 05     3.019    2.837   70.0   19.6   246   26.3 
2026-06-02 00:00 UT   00 01 52.6   +00 03 40     3.007    2.838   70.7   19.7   246   26.3 
2026-06-03 00:00 UT   00 02 42.2   +00 01 41     2.994    2.840   71.5   19.8   246   26.3 
2026-06-04 00:00 UT   00 03 31.2   +00 06 57     2.982    2.841   72.2   19.9   246   26.3 
2026-06-05 00:00 UT   00 04 19.5   +00 12 09     2.969    2.842   72.9   20.0   246   26.3 
2026-06-06 00:00 UT   00 05 07.1   +00 17 16     2.956    2.843   73.7   20.0   247   26.3 
2026-06-07 00:00 UT   00 05 54.0   +00 22 18     2.943    2.844   74.4   20.1   247   26.2 
2026-06-08 00:00 UT   00 06 40.2   +00 27 16     2.930    2.845   75.2   20.2   247   26.2 
2026-06-09 00:00 UT   00 07 25.6   +00 32 09     2.917    2.846   75.9   20.2   247   26.2 
2026-06-10 00:00 UT   00 08 10.3   +00 36 57     2.904    2.847   76.7   20.3   247   26.2 
2026-06-11 00:00 UT   00 08 54.3   +00 41 40     2.891    2.848   77.4   20.4   247   26.2 

    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.