(494999) 2010 JU39
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Jan 2026	22.3	1.137 AU	1.296 AU	16h40m	+09°16'	57.9°	47.2°

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 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
2026-01-19 00:00 UT   16 40 34.5   +09 16 22     1.296    1.137   57.9   47.2   301   22.3 
2026-01-19 10:55 UT   16 41 36.7   +09 17 55     1.297    1.140   58.0   47.1   301   22.3 
2026-01-20 00:00 UT   16 42 50.9   +09 19 48     1.298    1.144   58.2   47.0   301   22.3 
2026-01-21 00:00 UT   16 45 06.0   +09 23 17     1.299    1.151   58.6   46.9   300   22.3 
2026-01-22 00:00 UT   16 47 20.1   +09 26 51     1.301    1.158   59.0   46.8   300   22.3 
2026-01-23 00:00 UT   16 49 32.9   +09 30 30     1.302    1.164   59.3   46.6   300   22.3 
2026-01-24 00:00 UT   16 51 44.6   +09 34 13     1.303    1.171   59.7   46.5   299   22.4 
2026-01-25 00:00 UT   16 53 55.2   +09 38 01     1.304    1.178   60.1   46.4   299   22.4 
2026-01-26 00:00 UT   16 56 04.6   +09 41 54     1.304    1.184   60.4   46.3   298   22.4 
2026-01-27 00:00 UT   16 58 12.9   +09 45 53     1.305    1.191   60.8   46.2   298   22.4 
2026-01-28 00:00 UT   17 00 20.1   +09 49 56     1.305    1.197   61.2   46.1   297   22.4 
2026-01-29 00:00 UT   17 02 26.2   +09 54 05     1.305    1.203   61.5   46.0   297   22.4 
2026-01-30 00:00 UT   17 04 31.2   +09 58 20     1.305    1.209   61.9   45.9   296   22.4 
2026-01-31 00:00 UT   17 06 35.1   +10 02 40     1.304    1.215   62.3   45.9   296   22.4 
2026-02-01 00:00 UT   17 08 38.0   +10 07 06     1.304    1.221   62.7   45.8   296   22.4 
2026-02-02 00:00 UT   17 10 39.7   +10 11 38     1.303    1.227   63.1   45.7   295   22.4 
2026-02-03 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 

    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.