(132) Aethra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Nov 2025	15.1	3.221 AU	3.644 AU	18h34m	-09°35'	57.5°	15.0°
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
2025-11-05 00:00 UT   18 34 57.7   -09 35 37     3.644    3.221   57.5   15.0    78   15.1 
2025-11-05 11:35 UT   18 35 30.0   -09 35 09     3.651    3.222   57.1   15.0    77   15.1 
2025-11-06 00:00 UT   18 36 04.8   -09 34 38     3.658    3.224   56.8   14.9    77   15.1 
2025-11-07 00:00 UT   18 37 12.2   -09 33 36     3.673    3.226   56.1   14.8    77   15.2 
2025-11-08 00:00 UT   18 38 20.0   -09 32 31     3.687    3.229   55.4   14.6    77   15.2 
2025-11-09 00:00 UT   18 39 28.2   -09 31 22     3.701    3.231   54.7   14.5    76   15.2 
2025-11-10 00:00 UT   18 40 36.7   -09 30 09     3.715    3.234   54.0   14.3    76   15.2 
2025-11-11 00:00 UT   18 41 45.6   -09 28 53     3.729    3.237   53.3   14.2    75   15.2 
2025-11-12 00:00 UT   18 42 54.8   -09 27 34     3.743    3.239   52.7   14.1    75   15.2 
2025-11-13 00:00 UT   18 44 04.3   -09 26 11     3.756    3.242   52.0   13.9    75   15.2 
2025-11-14 00:00 UT   18 45 14.1   -09 24 44     3.770    3.244   51.3   13.8    74   15.2 
2025-11-15 00:00 UT   18 46 24.3   -09 23 14     3.783    3.247   50.6   13.6    74   15.2 
2025-11-16 00:00 UT   18 47 34.7   -09 21 40     3.797    3.250   50.0   13.5    73   15.2 
2025-11-17 00:00 UT   18 48 45.5   -09 20 02     3.810    3.252   49.3   13.3    73   15.2 
2025-11-18 00:00 UT   18 49 56.5   -09 18 21     3.823    3.255   48.6   13.2    73   15.2 
2025-11-19 00:00 UT   18 51 07.8   -09 16 36     3.836    3.257   47.9   13.0    72   15.2 
2025-11-20 00:00 UT   18 52 19.4   -09 14 47     3.848    3.260   47.3   12.9    72   15.2 
2025-11-21 00:00 UT   18 53 31.2   -09 12 54     3.861    3.262   46.6   12.7    71   15.2 
2025-11-22 00:00 UT   18 54 43.3   -09 10 58     3.874    3.265   45.9   12.6    71   15.2 
2025-11-23 00:00 UT   18 55 55.6   -09 08 57     3.886    3.267   45.3   12.4    70   15.2 
2025-11-24 00:00 UT   18 57 08.2   -09 06 53     3.898    3.270   44.6   12.2    70   15.2 
2025-11-25 00:00 UT   18 58 21.0   -09 04 45     3.910    3.272   44.0   12.1    70   15.2 
2025-11-26 00:00 UT   18 59 34.0   -09 02 33     3.922    3.275   43.3   11.9    69   15.2 
2025-11-27 00:00 UT   19 00 47.3   -09 00 17     3.934    3.277   42.7   11.8    69   15.2 
2025-11-28 00:00 UT   19 02 00.7   -08 57 57     3.946    3.280   42.0   11.6    68   15.2 
2025-11-29 00:00 UT   19 03 14.3   -08 55 33     3.957    3.282   41.3   11.5    68   15.2 
2025-11-30 00:00 UT   19 04 28.1   -08 53 06     3.969    3.285   40.7   11.3    67   15.2 
2025-12-01 00:00 UT   19 05 42.1   -08 50 34     3.980    3.287   40.1   11.1    67   15.2 
2025-12-02 00:00 UT   19 06 56.3   -08 47 58     3.991    3.290   39.4   11.0    66   15.2 
2025-12-03 00:00 UT   19 08 10.6   -08 45 19     4.002    3.292   38.8   10.8    65   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.