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(124) Alkeste
ephemeris date magn radius delta ra dec elong phase
Today6 Mar 202613.22.586 AU3.559 AU22h27m-08°19'9.7°3.7°
Opposition14 Oct 202611.62.758 AU1.761 AU01h21m+07°25'178.7°0.5°
(124) Alkeste - 2026-03-06
astro.vanbuitenen.nl


 
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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 Alkeste are:

            e (Eccentricity)                : 0.0784099
            a (Semimajor axis)              : 2.6298480
            i (Inclination)                 : 2.96348
            Ω (Longitude of ascending node) : 187.90218
            ω (Argument of perihelion)      : 61.59313
            M (Mean anomaly)                : 49.17832
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 249.46321
            B (Latitude of perihelion)      : 2.60639
            P (Orbital period in years)     : 4.26            
        

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
2026-03-06 00:00 UT   22 27 12.6   -08 19 37     3.559    2.586    9.7    3.7   256   13.2 
2026-03-06 03:04 UT   22 27 25.6   -08 18 24     3.559    2.587    9.7    3.7   256   13.2 
2026-03-07 00:00 UT   22 28 54.1   -08 10 08     3.558    2.587   10.2    3.9   255   13.2 
2026-03-08 00:00 UT   22 30 35.5   -08 00 39     3.556    2.588   10.8    4.1   255   13.2 
2026-03-09 00:00 UT   22 32 16.6   -07 51 08     3.555    2.589   11.3    4.3   255   13.3 
2026-03-10 00:00 UT   22 33 57.5   -07 41 36     3.553    2.590   11.9    4.5   254   13.3 
2026-03-11 00:00 UT   22 35 38.3   -07 32 03     3.552    2.591   12.4    4.7   254   13.3 
2026-03-12 00:00 UT   22 37 18.8   -07 22 29     3.550    2.591   13.0    4.9   253   13.3 
2026-03-13 00:00 UT   22 38 59.1   -07 12 54     3.548    2.592   13.5    5.1   253   13.3 
2026-03-14 00:00 UT   22 40 39.2   -07 03 18     3.546    2.593   14.1    5.3   253   13.3 
2026-03-15 00:00 UT   22 42 19.2   -06 53 41     3.544    2.594   14.6    5.6   253   13.3 
2026-03-16 00:00 UT   22 43 58.9   -06 44 03     3.542    2.595   15.2    5.8   252   13.3 
2026-03-17 00:00 UT   22 45 38.4   -06 34 25     3.539    2.596   15.7    6.0   252   13.3 
2026-03-18 00:00 UT   22 47 17.7   -06 24 45     3.537    2.596   16.3    6.2   252   13.3 
2026-03-19 00:00 UT   22 48 56.8   -06 15 06     3.534    2.597   16.8    6.4   252   13.4 
2026-03-20 00:00 UT   22 50 35.7   -06 05 25     3.531    2.598   17.4    6.6   251   13.4 
2026-03-21 00:00 UT   22 52 14.3   -05 55 45     3.528    2.599   17.9    6.8   251   13.4 
2026-03-22 00:00 UT   22 53 52.8   -05 46 04     3.525    2.600   18.5    7.0   251   13.4 
2026-03-23 00:00 UT   22 55 31.0   -05 36 22     3.522    2.601   19.0    7.2   251   13.4 
2026-03-24 00:00 UT   22 57 09.0   -05 26 40     3.519    2.601   19.6    7.4   251   13.4 
2026-03-25 00:00 UT   22 58 46.8   -05 16 58     3.515    2.602   20.2    7.6   251   13.4 


    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.