2020 OM4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Dec 2025	28.6	2.476 AU	2.813 AU	13h01m	-18°20'	60.2°	20.2°

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 2020 OM4 are:

            e (Eccentricity)                : 0.5047802
            a (Semimajor axis)              : 1.6717280
            i (Inclination)                 : 15.41711
            Ω (Longitude of ascending node) : 308.09373
            ω (Argument of perihelion)      : 63.83601
            M (Mean anomaly)                : 143.49152
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 11.08949
            B (Latitude of perihelion)      : 13.80419
            P (Orbital period in years)     : 2.16            
        

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
2025-12-13 00:00 UT   13 01 34.4   -18 20 01     2.813    2.476   60.2   20.2   287   28.6 
2025-12-13 04:08 UT   13 01 45.8   -18 22 00     2.811    2.476   60.3   20.2   287   28.6 
2025-12-14 00:00 UT   13 02 40.5   -18 31 32     2.802    2.477   60.9   20.3   287   28.6 
2025-12-15 00:00 UT   13 03 46.0   -18 43 01     2.791    2.478   61.6   20.4   287   28.6 
2025-12-16 00:00 UT   13 04 51.0   -18 54 29     2.780    2.480   62.3   20.6   287   28.6 
2025-12-17 00:00 UT   13 05 55.3   -19 05 55     2.768    2.481   63.0   20.7   287   28.6 
2025-12-18 00:00 UT   13 06 59.0   -19 17 20     2.757    2.482   63.7   20.8   287   28.6 
2025-12-19 00:00 UT   13 08 02.1   -19 28 44     2.746    2.484   64.4   20.9   287   28.6 
2025-12-20 00:00 UT   13 09 04.5   -19 40 06     2.734    2.485   65.1   21.0   287   28.6 
2025-12-21 00:00 UT   13 10 06.3   -19 51 27     2.722    2.486   65.8   21.2   288   28.6 
2025-12-22 00:00 UT   13 11 07.4   -20 02 46     2.711    2.487   66.5   21.3   288   28.6 
2025-12-23 00:00 UT   13 12 07.9   -20 14 04     2.699    2.488   67.2   21.4   288   28.6 
2025-12-24 00:00 UT   13 13 07.6   -20 25 20     2.687    2.489   67.9   21.5   288   28.6 
2025-12-25 00:00 UT   13 14 06.6   -20 36 35     2.675    2.490   68.6   21.6   288   28.6 
2025-12-26 00:00 UT   13 15 04.9   -20 47 48     2.663    2.492   69.3   21.7   288   28.6 
2025-12-27 00:00 UT   13 16 02.5   -20 59 00     2.650    2.493   70.1   21.8   288   28.6 
2025-12-28 00:00 UT   13 16 59.3   -21 10 10     2.638    2.494   70.8   21.9   288   28.5 
2025-12-29 00:00 UT   13 17 55.3   -21 21 19     2.626    2.495   71.5   22.0   288   28.5 
2025-12-30 00:00 UT   13 18 50.6   -21 32 26     2.613    2.496   72.2   22.0   289   28.5 
2025-12-31 00:00 UT   13 19 45.0   -21 43 31     2.601    2.497   73.0   22.1   289   28.5 
2026-01-01 00:00 UT   13 20 38.6   -21 54 34     2.588    2.498   73.7   22.2   289   28.5 
2026-01-02 00:00 UT   13 21 31.4   -22 05 36     2.575    2.498   74.5   22.3   289   28.5 
2026-01-03 00:00 UT   13 22 23.3   -22 16 37     2.563    2.499   75.2   22.4   289   28.5 
2026-01-04 00:00 UT   13 23 14.4   -22 27 35     2.550    2.500   75.9   22.4   289   28.5 
2026-01-05 00:00 UT   13 24 04.6   -22 38 32     2.537    2.501   76.7   22.5   289   28.5 
2026-01-06 00:00 UT   13 24 53.9   -22 49 27     2.524    2.502   77.4   22.6   289   28.5 
2026-01-07 00:00 UT   13 25 42.2   -23 00 21     2.511    2.503   78.2   22.6   290   28.5 
2026-01-08 00:00 UT   13 26 29.7   -23 11 12     2.498    2.503   79.0   22.7   290   28.5 
2026-01-09 00:00 UT   13 27 16.1   -23 22 02     2.485    2.504   79.7   22.7   290   28.5 
2026-01-10 00:00 UT   13 28 01.6   -23 32 49     2.472    2.505   80.5   22.8   290   28.4 
2026-01-11 00:00 UT   13 28 46.0   -23 43 35     2.459    2.506   81.3   22.8   290   28.4 

    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.