(132) Aethra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 May 2026	15.4	3.567 AU	3.652 AU	21h58m	+10°36'	77.2°	16.0°
Opposition	24 Aug 2026	14.5	3.623 AU	2.730 AU	21h25m	+19°27'	147.3°	8.7°

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 Aethra are:

            e (Eccentricity)                : 0.3870077
            a (Semimajor axis)              : 2.6120811
            i (Inclination)                 : 24.98355
            Ω (Longitude of ascending node) : 258.05085
            ω (Argument of perihelion)      : 255.61885
            M (Mean anomaly)                : 113.06116
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 332.25599
            B (Latitude of perihelion)      : -24.14978
            P (Orbital period in years)     : 4.22            
        

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
2026-05-13 00:00 UT   21 58 32.3   +10 36 59     3.652    3.567   77.2   16.0   254   15.4 
2026-05-13 01:01 UT   21 58 33.5   +10 37 24     3.652    3.567   77.2   16.0   253   15.4 
2026-05-14 00:00 UT   21 59 01.1   +10 46 43     3.640    3.567   77.9   16.1   253   15.4 
2026-05-15 00:00 UT   21 59 29.1   +10 56 25     3.627    3.568   78.6   16.1   253   15.4 
2026-05-16 00:00 UT   21 59 56.3   +11 06 07     3.615    3.569   79.4   16.2   253   15.4 
2026-05-17 00:00 UT   22 00 22.6   +11 15 48     3.602    3.570   80.1   16.2   252   15.4 
2026-05-18 00:00 UT   22 00 48.2   +11 25 28     3.590    3.571   80.9   16.2   252   15.4 
2026-05-19 00:00 UT   22 01 12.9   +11 35 06     3.577    3.572   81.6   16.3   252   15.4 
2026-05-20 00:00 UT   22 01 36.8   +11 44 44     3.564    3.573   82.3   16.3   251   15.4 
2026-05-21 00:00 UT   22 01 59.8   +11 54 20     3.552    3.574   83.1   16.3   251   15.4 
2026-05-22 00:00 UT   22 02 21.9   +12 03 55     3.539    3.575   83.8   16.3   251   15.4 
2026-05-23 00:00 UT   22 02 43.2   +12 13 29     3.526    3.576   84.6   16.4   250   15.3 
2026-05-24 00:00 UT   22 03 03.6   +12 23 00     3.514    3.577   85.4   16.4   250   15.3 
2026-05-25 00:00 UT   22 03 23.1   +12 32 30     3.501    3.578   86.1   16.4   250   15.3 
2026-05-26 00:00 UT   22 03 41.7   +12 41 59     3.488    3.579   86.9   16.4   249   15.3 
2026-05-27 00:00 UT   22 03 59.4   +12 51 25     3.475    3.580   87.6   16.4   249   15.3 
2026-05-28 00:00 UT   22 04 16.2   +13 00 50     3.463    3.580   88.4   16.4   248   15.3 
2026-05-29 00:00 UT   22 04 32.0   +13 10 12     3.450    3.581   89.1   16.4   248   15.3 
2026-05-30 00:00 UT   22 04 47.0   +13 19 32     3.437    3.582   89.9   16.4   248   15.3 
2026-05-31 00:00 UT   22 05 01.0   +13 28 50     3.425    3.583   90.7   16.4   247   15.3 
2026-06-01 00:00 UT   22 05 14.0   +13 38 06     3.412    3.584   91.5   16.4   247   15.3 
2026-06-02 00:00 UT   22 05 26.1   +13 47 19     3.399    3.585   92.2   16.4   247   15.3 
2026-06-03 00:00 UT   22 05 37.2   +13 56 29     3.386    3.585   93.0   16.4   246   15.3 
2026-06-04 00:00 UT   22 05 47.4   +14 05 37     3.374    3.586   93.8   16.4   246   15.3 
2026-06-05 00:00 UT   22 05 56.6   +14 14 42     3.361    3.587   94.5   16.4   245   15.2 
2026-06-06 00:00 UT   22 06 04.7   +14 23 44     3.348    3.588   95.3   16.4   245   15.2 
2026-06-07 00:00 UT   22 06 11.9   +14 32 42     3.336    3.589   96.1   16.3   245   15.2 
2026-06-08 00:00 UT   22 06 18.0   +14 41 37     3.323    3.589   96.9   16.3   244   15.2 
2026-06-09 00:00 UT   22 06 23.1   +14 50 29     3.311    3.590   97.7   16.3   244   15.2 
2026-06-10 00:00 UT   22 06 27.2   +14 59 17     3.298    3.591   98.5   16.2   243   15.2 
2026-06-11 00:00 UT   22 06 30.3   +15 08 02     3.286    3.592   99.3   16.2   243   15.2 
2026-06-12 00:00 UT   22 06 32.2   +15 16 42     3.273    3.592  100.0   16.2   243   15.2 

    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.