(438908) 2009 XO
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Sep 2026	24.6	2.851 AU	1.857 AU	23h55m	-00°50'	168.4°	4.1°

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)                : 0.5434776
            a (Semimajor axis)              : 1.8590719
            i (Inclination)                 : 0.34847
            Ω (Longitude of ascending node) : 27.93756
            ω (Argument of perihelion)      : 140.52215
            M (Mean anomaly)                : 160.85236
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : -11.53977
            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
2026-09-10 00:00 UT   23 55 10.1   +00 50 43     1.857    2.851  168.4    4.1   248   24.6 
2026-09-10 04:02 UT   23 54 58.9   +00 51 56     1.856    2.851  168.6    4.0   248   24.6 
2026-09-11 00:00 UT   23 54 02.9   +00 57 58     1.854    2.850  169.7    3.6   248   24.6 
2026-09-12 00:00 UT   23 52 55.1   -01 05 16     1.850    2.849  170.9    3.2   248   24.6 
2026-09-13 00:00 UT   23 51 46.8   -01 12 37     1.848    2.848  172.2    2.7   249   24.5 
2026-09-14 00:00 UT   23 50 38.0   -01 20 00     1.845    2.847  173.5    2.3   249   24.5 
2026-09-15 00:00 UT   23 49 28.8   -01 27 26     1.843    2.846  174.8    1.8   250   24.5 
2026-09-16 00:00 UT   23 48 19.3   -01 34 54     1.841    2.845  176.1    1.4   251   24.4 
2026-09-17 00:00 UT   23 47 09.5   -01 42 23     1.840    2.844  177.4    0.9   253   24.4 
2026-09-18 00:00 UT   23 45 59.5   -01 49 53     1.838    2.843  178.7    0.5   259   24.3 
2026-09-19 00:00 UT   23 44 49.4   -01 57 23     1.838    2.842  179.7    0.1   332   24.3 
2026-09-20 00:00 UT   23 43 39.2   -02 04 53     1.837    2.841  178.7    0.5    54   24.3 
2026-09-21 00:00 UT   23 42 29.0   -02 12 23     1.837    2.840  177.4    0.9    60   24.4 
2026-09-22 00:00 UT   23 41 18.9   -02 19 52     1.837    2.839  176.1    1.4    62   24.4 
2026-09-23 00:00 UT   23 40 09.0   -02 27 19     1.837    2.838  174.8    1.8    64   24.4 
2026-09-24 00:00 UT   23 38 59.2   -02 34 45     1.838    2.837  173.5    2.3    64   24.5 
2026-09-25 00:00 UT   23 37 49.7   -02 42 09     1.839    2.836  172.3    2.7    65   24.5 
2026-09-26 00:00 UT   23 36 40.5   -02 49 30     1.840    2.834  171.0    3.2    65   24.5 
2026-09-27 00:00 UT   23 35 31.7   -02 56 47     1.841    2.833  169.7    3.6    65   24.6 
2026-09-28 00:00 UT   23 34 23.4   -03 04 02     1.843    2.832  168.4    4.1    65   24.6 
2026-09-29 00:00 UT   23 33 15.6   -03 11 13     1.845    2.831  167.1    4.5    66   24.6 
2026-09-30 00:00 UT   23 32 08.3   -03 18 19     1.848    2.830  165.8    5.0    66   24.6 
2026-10-01 00:00 UT   23 31 01.7   -03 25 21     1.851    2.828  164.5    5.4    66   24.7 
2026-10-02 00:00 UT   23 29 55.8   -03 32 18     1.854    2.827  163.2    5.9    66   24.7 
2026-10-03 00:00 UT   23 28 50.6   -03 39 09     1.857    2.826  162.0    6.3    66   24.7 
2026-10-04 00:00 UT   23 27 46.3   -03 45 55     1.861    2.824  160.7    6.7    66   24.7 
2026-10-05 00:00 UT   23 26 42.8   -03 52 35     1.865    2.823  159.4    7.2    66   24.8 
2026-10-06 00:00 UT   23 25 40.2   -03 59 09     1.869    2.822  158.2    7.6    66   24.8 
2026-10-07 00:00 UT   23 24 38.6   -04 05 35     1.874    2.820  156.9    8.0    66   24.8 

    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.