(335) Roberta
ephemeris date magn radius delta ra dec elong phase
Opposition2 Aug 202411.02.073 AU1.059 AU20h51m-14°30'176.9°1.5°
Today8 Sep 202412.12.107 AU1.232 AU20h31m-18°07'140.2°17.8°
(335) Roberta - 2024-09-08
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 Roberta are:

            e (Eccentricity)                : 0.1719232
            a (Semimajor axis)              : 2.4754033
            i (Inclination)                 : 5.10247
            Ω (Longitude of ascending node) : 148.41485
            ω (Argument of perihelion)      : 139.78186
            M (Mean anomaly)                : 34.89283
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 108.30884
            B (Latitude of perihelion)      : 3.29212
            P (Orbital period in years)     : 3.89            
        

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
2024-09-08 00:00 UT   20 31 20.3   -18 07 48     1.232    2.107  140.2   17.8    77   12.1 
2024-09-08 02:02 UT   20 31 20.1   -18 08 07     1.232    2.107  140.1   17.9    77   12.1 
2024-09-09 00:00 UT   20 31 17.9   -18 11 27     1.240    2.108  139.2   18.2    77   12.2 
2024-09-10 00:00 UT   20 31 17.5   -18 14 55     1.249    2.109  138.2   18.6    77   12.2 
2024-09-11 00:00 UT   20 31 19.0   -18 18 15     1.257    2.110  137.2   18.9    77   12.2 
2024-09-12 00:00 UT   20 31 22.5   -18 21 24     1.266    2.111  136.2   19.3    76   12.2 
2024-09-13 00:00 UT   20 31 27.9   -18 24 24     1.275    2.112  135.3   19.6    76   12.3 
2024-09-14 00:00 UT   20 31 35.3   -18 27 15     1.284    2.113  134.3   19.9    76   12.3 
2024-09-15 00:00 UT   20 31 44.6   -18 29 56     1.294    2.115  133.4   20.2    76   12.3 
2024-09-16 00:00 UT   20 31 55.9   -18 32 27     1.303    2.116  132.4   20.5    76   12.3 
2024-09-17 00:00 UT   20 32 09.0   -18 34 49     1.313    2.117  131.5   20.8    76   12.4 
2024-09-18 00:00 UT   20 32 24.1   -18 37 02     1.322    2.118  130.6   21.1    76   12.4 
2024-09-19 00:00 UT   20 32 41.0   -18 39 05     1.332    2.119  129.6   21.4    76   12.4 
2024-09-20 00:00 UT   20 32 59.7   -18 40 58     1.342    2.121  128.7   21.7    76   12.5 
2024-09-21 00:00 UT   20 33 20.4   -18 42 43     1.352    2.122  127.8   22.0    76   12.5 
2024-09-22 00:00 UT   20 33 42.8   -18 44 17     1.363    2.123  126.9   22.2    76   12.5 
2024-09-23 00:00 UT   20 34 07.0   -18 45 43     1.373    2.124  126.0   22.5    76   12.5 
2024-09-24 00:00 UT   20 34 33.0   -18 46 59     1.383    2.125  125.1   22.7    76   12.6 
2024-09-25 00:00 UT   20 35 00.8   -18 48 06     1.394    2.127  124.3   22.9    76   12.6 
2024-09-26 00:00 UT   20 35 30.4   -18 49 04     1.405    2.128  123.4   23.2    75   12.6 
2024-09-27 00:00 UT   20 36 01.7   -18 49 53     1.415    2.129  122.5   23.4    75   12.6 
2024-09-28 00:00 UT   20 36 34.7   -18 50 32     1.426    2.130  121.7   23.6    75   12.7 
2024-09-29 00:00 UT   20 37 09.4   -18 51 02     1.437    2.132  120.8   23.8    75   12.7 
2024-09-30 00:00 UT   20 37 45.8   -18 51 24     1.448    2.133  120.0   24.0    75   12.7 
2024-10-01 00:00 UT   20 38 23.9   -18 51 36     1.460    2.134  119.1   24.2    75   12.7 
2024-10-02 00:00 UT   20 39 03.5   -18 51 39     1.471    2.136  118.3   24.4    75   12.8 
2024-10-03 00:00 UT   20 39 44.8   -18 51 33     1.482    2.137  117.5   24.5    75   12.8 
2024-10-04 00:00 UT   20 40 27.7   -18 51 18     1.494    2.138  116.7   24.7    75   12.8 
2024-10-05 00:00 UT   20 41 12.2   -18 50 54     1.505    2.140  115.8   24.9    75   12.8 
2024-10-06 00:00 UT   20 41 58.2   -18 50 21     1.517    2.141  115.0   25.0    75   12.8 
2024-10-07 00:00 UT   20 42 45.7   -18 49 39     1.529    2.142  114.2   25.2    75   12.9 
2024-10-08 00:00 UT   20 43 34.7   -18 48 49     1.540    2.144  113.4   25.3    75   12.9 


    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.