(5) Astraea
ephemeris date magn radius delta ra dec elong phase
Opposition8 Sep 202211.12.998 AU1.991 AU23h11m-08°44'176.7°1.1°
Today6 Oct 202211.62.972 AU2.081 AU22h51m-11°17'147.3°10.5°
(5) Astraea - 2022-10-06
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 Astraea are:

            e (Eccentricity)                : 0.1889852
            a (Semimajor axis)              : 2.5775402
            i (Inclination)                 : 5.36542
            Ω (Longitude of ascending node) : 141.56759
            ω (Argument of perihelion)      : 358.79230
            M (Mean anomaly)                : 208.56769
            Epoch                           : 2022 Aug 09

            L (Longitude of perihelion)     : 140.36518
            B (Latitude of perihelion)      : -0.11292
            P (Orbital period in years)     : 4.14            
        

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. A more printer-friendly version of the same chart can be found below.




Ephemerides:
Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2022-10-06 00:00 UT   22 51 18.7   -11 17 16     2.081    2.972  147.3   10.5    62   11.6 
2022-10-06 16:57 UT   22 50 54.9   -11 19 60     2.086    2.971  146.5   10.7    62   11.7 
2022-10-07 00:00 UT   22 50 45.1   -11 21 07     2.088    2.971  146.1   10.8    62   11.7 
2022-10-08 00:00 UT   22 50 12.7   -11 24 48     2.095    2.969  145.0   11.1    62   11.7 
2022-10-09 00:00 UT   22 49 41.5   -11 28 20     2.102    2.968  143.9   11.4    63   11.7 
2022-10-10 00:00 UT   22 49 11.4   -11 31 42     2.110    2.967  142.8   11.7    63   11.7 
2022-10-11 00:00 UT   22 48 42.6   -11 34 56     2.118    2.966  141.7   12.1    63   11.7 
2022-10-12 00:00 UT   22 48 15.0   -11 37 60     2.126    2.965  140.6   12.3    63   11.8 
2022-10-13 00:00 UT   22 47 48.6   -11 40 54     2.134    2.964  139.5   12.6    63   11.8 
2022-10-14 00:00 UT   22 47 23.6   -11 43 40     2.143    2.963  138.4   12.9    64   11.8 
2022-10-15 00:00 UT   22 46 59.8   -11 46 15     2.151    2.962  137.3   13.2    64   11.8 
2022-10-16 00:00 UT   22 46 37.4   -11 48 41     2.160    2.961  136.2   13.5    64   11.8 
2022-10-17 00:00 UT   22 46 16.2   -11 50 58     2.169    2.960  135.1   13.8    64   11.8 
2022-10-18 00:00 UT   22 45 56.4   -11 53 05     2.178    2.959  134.0   14.0    64   11.9 
2022-10-19 00:00 UT   22 45 38.0   -11 55 02     2.188    2.958  132.9   14.3    64   11.9 
2022-10-20 00:00 UT   22 45 20.9   -11 56 50     2.197    2.957  131.9   14.5    64   11.9 
2022-10-21 00:00 UT   22 45 05.2   -11 58 28     2.207    2.955  130.8   14.8    65   11.9 
2022-10-22 00:00 UT   22 44 50.8   -11 59 57     2.217    2.954  129.8   15.0    65   11.9 
2022-10-23 00:00 UT   22 44 37.9   -12 01 16     2.227    2.953  128.7   15.2    65   12.0 
2022-10-24 00:00 UT   22 44 26.3   -12 02 25     2.237    2.952  127.7   15.5    65   12.0 
2022-10-25 00:00 UT   22 44 16.2   -12 03 25     2.247    2.951  126.6   15.7    65   12.0 
2022-10-26 00:00 UT   22 44 07.4   -12 04 16     2.258    2.950  125.6   15.9    65   12.0 
2022-10-27 00:00 UT   22 44 00.1   -12 04 57     2.269    2.949  124.6   16.1    65   12.0 
2022-10-28 00:00 UT   22 43 54.1   -12 05 28     2.279    2.948  123.6   16.3    65   12.0 
2022-10-29 00:00 UT   22 43 49.6   -12 05 50     2.290    2.946  122.5   16.5    65   12.1 
2022-10-30 00:00 UT   22 43 46.5   -12 06 03     2.301    2.945  121.5   16.7    66   12.1 
2022-10-31 00:00 UT   22 43 44.7   -12 06 07     2.313    2.944  120.5   16.9    66   12.1 
2022-11-01 00:00 UT   22 43 44.4   -12 06 01     2.324    2.943  119.5   17.1    66   12.1 
2022-11-02 00:00 UT   22 43 45.4   -12 05 46     2.335    2.942  118.5   17.2    66   12.1 
2022-11-03 00:00 UT   22 43 47.9   -12 05 22     2.347    2.941  117.6   17.4    66   12.1 
2022-11-04 00:00 UT   22 43 51.7   -12 04 50     2.358    2.939  116.6   17.6    66   12.1 
2022-11-05 00:00 UT   22 43 56.8   -12 04 08     2.370    2.938  115.6   17.7    66   12.2 


    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.