(438908) 2009 XO
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	11 Aug 2026	25.3	2.867 AU	2.083 AU	00h20m	+01°53'	132.6°	15.1°

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
2026-08-11 00:00 UT   00 20 26.0   +01 53 27     2.083    2.867  132.6   15.1   247   25.3 
2026-08-11 02:41 UT   00 20 22.6   +01 53 05     2.082    2.867  132.7   15.1   247   25.3 
2026-08-12 00:00 UT   00 19 55.5   +01 50 08     2.072    2.867  133.7   14.8   247   25.3 
2026-08-13 00:00 UT   00 19 23.5   +01 46 39     2.062    2.867  134.8   14.5   247   25.3 
2026-08-14 00:00 UT   00 18 50.0   +01 42 60     2.051    2.867  135.9   14.2   247   25.3 
2026-08-15 00:00 UT   00 18 15.0   +01 39 11     2.041    2.866  137.0   13.9   247   25.3 
2026-08-16 00:00 UT   00 17 38.4   +01 35 12     2.031    2.866  138.1   13.6   247   25.2 
2026-08-17 00:00 UT   00 17 00.3   +01 31 03     2.021    2.866  139.3   13.3   247   25.2 
2026-08-18 00:00 UT   00 16 20.7   +01 26 45     2.012    2.865  140.4   13.0   247   25.2 
2026-08-19 00:00 UT   00 15 39.6   +01 22 17     2.002    2.865  141.5   12.7   247   25.2 
2026-08-20 00:00 UT   00 14 57.1   +01 17 40     1.993    2.864  142.7   12.4   247   25.2 
2026-08-21 00:00 UT   00 14 13.1   +01 12 54     1.984    2.864  143.9   12.0   247   25.1 
2026-08-22 00:00 UT   00 13 27.7   +01 07 58     1.975    2.863  145.0   11.7   247   25.1 
2026-08-23 00:00 UT   00 12 40.8   +01 02 53     1.967    2.863  146.2   11.3   247   25.1 
2026-08-24 00:00 UT   00 11 52.6   +00 57 40     1.958    2.862  147.4   11.0   247   25.1 
2026-08-25 00:00 UT   00 11 03.1   +00 52 17     1.950    2.862  148.6   10.6   247   25.0 
2026-08-26 00:00 UT   00 10 12.2   +00 46 46     1.942    2.861  149.8   10.2   247   25.0 
2026-08-27 00:00 UT   00 09 19.9   +00 41 07     1.935    2.861  151.0    9.9   247   25.0 
2026-08-28 00:00 UT   00 08 26.4   +00 35 19     1.927    2.860  152.2    9.5   247   25.0 
2026-08-29 00:00 UT   00 07 31.7   +00 29 24     1.920    2.859  153.4    9.1   247   24.9 
2026-08-30 00:00 UT   00 06 35.7   +00 23 20     1.914    2.859  154.6    8.7   247   24.9 
2026-08-31 00:00 UT   00 05 38.6   +00 17 09     1.907    2.858  155.8    8.3   247   24.9 
2026-09-01 00:00 UT   00 04 40.3   +00 10 51     1.901    2.858  157.1    7.9   247   24.9 
2026-09-02 00:00 UT   00 03 40.9   +00 04 26     1.895    2.857  158.3    7.5   247   24.8 
2026-09-03 00:00 UT   00 02 40.5   +00 02 07     1.889    2.856  159.6    7.1   247   24.8 
2026-09-04 00:00 UT   00 01 39.0   +00 08 45     1.884    2.855  160.8    6.7   247   24.8 
2026-09-05 00:00 UT   00 00 36.6   +00 15 30     1.878    2.855  162.1    6.2   247   24.8 
2026-09-06 00:00 UT   23 59 33.2   +00 22 21     1.873    2.854  163.3    5.8   248   24.7 
2026-09-07 00:00 UT   23 58 28.9   +00 29 17     1.869    2.853  164.6    5.4   248   24.7 
2026-09-08 00:00 UT   23 57 23.8   +00 36 18     1.865    2.852  165.8    5.0   248   24.7 
2026-09-09 00:00 UT   23 56 18.0   +00 43 24     1.861    2.851  167.1    4.5   248   24.6 
2026-09-10 00:00 UT   23 55 11.4   +00 50 35     1.857    2.851  168.4    4.1   248   24.6 

    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.