(494999) 2010 JU39
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 Feb 2026	22.4	1.227 AU	1.303 AU	17h10m	+10°11'	63.1°	45.7°

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 2010 JU39 are:

            e (Eccentricity)                : 0.5460131
            a (Semimajor axis)              : 0.9191390
            i (Inclination)                 : 36.21576
            Ω (Longitude of ascending node) : 95.15951
            ω (Argument of perihelion)      : 311.38090
            M (Mean anomaly)                : 21.50942
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 52.67769
            B (Latitude of perihelion)      : -26.31568
            P (Orbital period in years)     : 0.88            
        

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
2026-02-02 00:00 UT   17 10 39.7   +10 11 38     1.303    1.227   63.1   45.7   295   22.4 
2026-02-02 13:07 UT   17 11 45.8   +10 14 10     1.303    1.230   63.3   45.7   295   22.4 
2026-02-03 00:00 UT   17 12 40.5   +10 16 17     1.302    1.233   63.4   45.7   295   22.4 
2026-02-04 00:00 UT   17 14 40.1   +10 21 02     1.301    1.239   63.8   45.6   294   22.5 
2026-02-05 00:00 UT   17 16 38.7   +10 25 53     1.300    1.244   64.2   45.5   294   22.5 
2026-02-06 00:00 UT   17 18 36.3   +10 30 51     1.299    1.250   64.6   45.5   293   22.5 
2026-02-07 00:00 UT   17 20 32.8   +10 35 56     1.297    1.255   65.0   45.4   293   22.5 
2026-02-08 00:00 UT   17 22 28.3   +10 41 07     1.296    1.260   65.4   45.4   292   22.5 
2026-02-09 00:00 UT   17 24 22.7   +10 46 26     1.294    1.265   65.8   45.3   292   22.5 
2026-02-10 00:00 UT   17 26 16.1   +10 51 52     1.292    1.271   66.2   45.3   291   22.5 
2026-02-11 00:00 UT   17 28 08.4   +10 57 25     1.290    1.276   66.6   45.3   291   22.5 
2026-02-12 00:00 UT   17 29 59.7   +11 03 05     1.287    1.280   67.0   45.2   290   22.5 
2026-02-13 00:00 UT   17 31 50.0   +11 08 53     1.285    1.285   67.4   45.2   290   22.5 
2026-02-14 00:00 UT   17 33 39.1   +11 14 48     1.282    1.290   67.9   45.2   289   22.5 
2026-02-15 00:00 UT   17 35 27.2   +11 20 50     1.279    1.295   68.3   45.1   289   22.5 
2026-02-16 00:00 UT   17 37 14.3   +11 27 01     1.276    1.299   68.7   45.1   288   22.5 
2026-02-17 00:00 UT   17 39 00.3   +11 33 19     1.273    1.304   69.1   45.1   288   22.5 
2026-02-18 00:00 UT   17 40 45.2   +11 39 44     1.270    1.308   69.5   45.1   287   22.5 
2026-02-19 00:00 UT   17 42 29.0   +11 46 17     1.266    1.312   70.0   45.0   287   22.5 
2026-02-20 00:00 UT   17 44 11.7   +11 52 58     1.263    1.317   70.4   45.0   287   22.5 

    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.