(494999) 2010 JU39
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Feb 2026	22.5	1.329 AU	1.251 AU	17h49m	+12°13'	71.7°	45.0°

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
2026-02-23 00:00 UT   17 49 13.3   +12 13 47     1.251    1.329   71.7   45.0   285   22.5 
2026-02-23 17:16 UT   17 50 24.2   +12 18 56     1.248    1.332   72.0   45.0   285   22.5 
2026-02-24 00:00 UT   17 50 51.7   +12 20 58     1.247    1.333   72.1   45.0   285   22.5 
2026-02-25 00:00 UT   17 52 28.9   +12 28 18     1.242    1.336   72.6   45.0   284   22.5 
2026-02-26 00:00 UT   17 54 05.1   +12 35 45     1.238    1.340   73.0   44.9   284   22.5 
2026-02-27 00:00 UT   17 55 40.1   +12 43 19     1.233    1.344   73.5   44.9   283   22.5 
2026-02-28 00:00 UT   17 57 14.0   +12 51 02     1.228    1.347   73.9   44.9   283   22.5 
2026-03-01 00:00 UT   17 58 46.8   +12 58 52     1.224    1.351   74.3   44.9   282   22.5 
2026-03-02 00:00 UT   18 00 18.5   +13 06 51     1.218    1.354   74.8   44.9   282   22.5 
2026-03-03 00:00 UT   18 01 49.0   +13 14 57     1.213    1.357   75.3   44.9   281   22.5 
2026-03-04 00:00 UT   18 03 18.4   +13 23 11     1.208    1.361   75.7   44.9   281   22.5 
2026-03-05 00:00 UT   18 04 46.7   +13 31 33     1.203    1.364   76.2   44.9   280   22.5 
2026-03-06 00:00 UT   18 06 13.8   +13 40 04     1.197    1.367   76.6   44.9   280   22.5 
2026-03-07 00:00 UT   18 07 39.7   +13 48 42     1.191    1.370   77.1   44.9   279   22.5 
2026-03-08 00:00 UT   18 09 04.5   +13 57 29     1.185    1.373   77.6   44.9   279   22.5 
2026-03-09 00:00 UT   18 10 28.1   +14 06 24     1.179    1.375   78.0   44.9   278   22.4 
2026-03-10 00:00 UT   18 11 50.4   +14 15 28     1.173    1.378   78.5   44.9   278   22.4 
2026-03-11 00:00 UT   18 13 11.5   +14 24 40     1.167    1.381   79.0   44.9   277   22.4 
2026-03-12 00:00 UT   18 14 31.4   +14 34 00     1.161    1.383   79.5   44.9   277   22.4 
2026-03-13 00:00 UT   18 15 50.0   +14 43 29     1.154    1.386   79.9   44.9   276   22.4 
2026-03-14 00:00 UT   18 17 07.3   +14 53 07     1.148    1.388   80.4   44.9   275   22.4 
2026-03-15 00:00 UT   18 18 23.3   +15 02 53     1.141    1.390   80.9   44.9   275   22.4 
2026-03-16 00:00 UT   18 19 38.0   +15 12 47     1.134    1.392   81.4   44.9   274   22.4 
2026-03-17 00:00 UT   18 20 51.3   +15 22 50     1.127    1.394   81.9   44.9   274   22.4 

    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.