(139) Juewa
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Jan 2026	13.6	2.720 AU	3.539 AU	18h02m	-31°37'	29.0°	10.1°
Opposition	19 Jul 2026	12.4	3.019 AU	2.025 AU	20h11m	-35°09'	165.2°	4.9°

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 Juewa are:

            e (Eccentricity)                : 0.1702488
            a (Semimajor axis)              : 2.7856237
            i (Inclination)                 : 10.87123
            Ω (Longitude of ascending node) : 1.66763
            ω (Argument of perihelion)      : 167.31766
            M (Mean anomaly)                : 59.93276
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -10.79428
            B (Latitude of perihelion)      : 2.37311
            P (Orbital period in years)     : 4.65            
        

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   18 02 57.7   -31 37 32     3.539    2.720   29.0   10.1   255   13.6 
2026-01-19 04:40 UT   18 03 20.3   -31 37 46     3.538    2.721   29.1   10.1   255   13.6 
2026-01-20 00:00 UT   18 04 53.7   -31 38 41     3.534    2.722   29.6   10.3   255   13.6 
2026-01-21 00:00 UT   18 06 49.3   -31 39 46     3.530    2.724   30.2   10.5   255   13.6 
2026-01-22 00:00 UT   18 08 44.7   -31 40 47     3.525    2.726   30.7   10.6   255   13.6 
2026-01-23 00:00 UT   18 10 39.8   -31 41 44     3.520    2.728   31.3   10.8   255   13.6 
2026-01-24 00:00 UT   18 12 34.6   -31 42 37     3.515    2.729   31.9   11.0   255   13.6 
2026-01-25 00:00 UT   18 14 29.0   -31 43 25     3.510    2.731   32.5   11.2   255   13.7 
2026-01-26 00:00 UT   18 16 23.1   -31 44 11     3.504    2.733   33.1   11.3   255   13.7 
2026-01-27 00:00 UT   18 18 16.9   -31 44 52     3.499    2.735   33.7   11.5   255   13.7 
2026-01-28 00:00 UT   18 20 10.4   -31 45 29     3.493    2.736   34.3   11.7   255   13.7 
2026-01-29 00:00 UT   18 22 03.4   -31 46 03     3.488    2.738   34.9   11.9   256   13.7 
2026-01-30 00:00 UT   18 23 56.2   -31 46 33     3.482    2.740   35.5   12.0   256   13.7 
2026-01-31 00:00 UT   18 25 48.5   -31 46 59     3.476    2.742   36.1   12.2   256   13.7 
2026-02-01 00:00 UT   18 27 40.5   -31 47 22     3.470    2.744   36.7   12.4   256   13.7 
2026-02-02 00:00 UT   18 29 32.2   -31 47 41     3.464    2.745   37.3   12.6   256   13.7 
2026-02-03 00:00 UT   18 31 23.4   -31 47 57     3.457    2.747   37.9   12.7   256   13.7 
2026-02-04 00:00 UT   18 33 14.3   -31 48 10     3.451    2.749   38.5   12.9   256   13.7 
2026-02-05 00:00 UT   18 35 04.7   -31 48 19     3.445    2.751   39.1   13.1   256   13.7 
2026-02-06 00:00 UT   18 36 54.8   -31 48 25     3.438    2.752   39.7   13.2   256   13.7 
2026-02-07 00:00 UT   18 38 44.4   -31 48 28     3.431    2.754   40.3   13.4   256   13.7 
2026-02-08 00:00 UT   18 40 33.7   -31 48 28     3.424    2.756   40.9   13.6   256   13.7 
2026-02-09 00:00 UT   18 42 22.5   -31 48 25     3.417    2.758   41.5   13.7   256   13.7 

    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.