(335) Roberta
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Oct 2025	13.9	2.776 AU	2.166 AU	05h53m	+17°00'	118.0°	18.5°
Opposition	11 Dec 2025	13.0	2.831 AU	1.852 AU	05h20m	+15°51'	172.7°	2.5°

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)                : 0.1715271
            a (Semimajor axis)              : 2.4764198
            i (Inclination)                 : 5.10249
            Ω (Longitude of ascending node) : 148.39541
            ω (Argument of perihelion)      : 139.93854
            M (Mean anomaly)                : 135.98574
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 108.44598
            B (Latitude of perihelion)      : 3.28146
            P (Orbital period in years)     : 3.90            
        

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
2025-10-20 00:00 UT   05 53 10.2   +17 00 56     2.166    2.776  118.0   18.5   273   13.9 
2025-10-20 11:14 UT   05 53 11.1   +17 00 04     2.161    2.777  118.4   18.4   273   13.9 
2025-10-21 00:00 UT   05 53 11.7   +16 59 06     2.155    2.777  118.9   18.3   273   13.9 
2025-10-22 00:00 UT   05 53 11.5   +16 57 17     2.145    2.778  119.9   18.1   273   13.9 
2025-10-23 00:00 UT   05 53 09.7   +16 55 27     2.134    2.780  120.9   17.9   273   13.9 
2025-10-24 00:00 UT   05 53 06.2   +16 53 39     2.124    2.781  121.9   17.7   273   13.9 
2025-10-25 00:00 UT   05 53 01.0   +16 51 50     2.113    2.782  122.9   17.5   274   13.9 
2025-10-26 00:00 UT   05 52 54.1   +16 50 02     2.103    2.783  123.9   17.2   274   13.8 
2025-10-27 00:00 UT   05 52 45.5   +16 48 14     2.093    2.784  124.9   17.0   274   13.8 
2025-10-28 00:00 UT   05 52 35.2   +16 46 27     2.083    2.785  126.0   16.8   274   13.8 
2025-10-29 00:00 UT   05 52 23.3   +16 44 41     2.073    2.787  127.0   16.5   274   13.8 
2025-10-30 00:00 UT   05 52 09.6   +16 42 55     2.064    2.788  128.0   16.3   274   13.8 
2025-10-31 00:00 UT   05 51 54.3   +16 41 10     2.054    2.789  129.1   16.0   275   13.8 
2025-11-01 00:00 UT   05 51 37.3   +16 39 26     2.045    2.790  130.1   15.8   275   13.7 
2025-11-02 00:00 UT   05 51 18.6   +16 37 42     2.036    2.791  131.2   15.5   275   13.7 
2025-11-03 00:00 UT   05 50 58.2   +16 35 60     2.027    2.792  132.3   15.2   275   13.7 
2025-11-04 00:00 UT   05 50 36.1   +16 34 18     2.018    2.793  133.3   15.0   276   13.7 
2025-11-05 00:00 UT   05 50 12.4   +16 32 38     2.009    2.794  134.4   14.7   276   13.7 
2025-11-06 00:00 UT   05 49 47.1   +16 30 59     2.001    2.795  135.5   14.4   276   13.7 
2025-11-07 00:00 UT   05 49 20.1   +16 29 20     1.992    2.797  136.6   14.1   276   13.6 
2025-11-08 00:00 UT   05 48 51.5   +16 27 43     1.984    2.798  137.7   13.8   277   13.6 
2025-11-09 00:00 UT   05 48 21.2   +16 26 08     1.976    2.799  138.8   13.5   277   13.6 
2025-11-10 00:00 UT   05 47 49.4   +16 24 33     1.968    2.800  139.9   13.2   277   13.6 
2025-11-11 00:00 UT   05 47 16.0   +16 22 60     1.961    2.801  141.0   12.8   277   13.6 
2025-11-12 00:00 UT   05 46 41.0   +16 21 28     1.954    2.802  142.1   12.5   278   13.5 
2025-11-13 00:00 UT   05 46 04.4   +16 19 58     1.947    2.803  143.3   12.2   278   13.5 
2025-11-14 00:00 UT   05 45 26.3   +16 18 29     1.940    2.804  144.4   11.9   279   13.5 
2025-11-15 00:00 UT   05 44 46.7   +16 17 02     1.933    2.805  145.5   11.5   279   13.5 
2025-11-16 00:00 UT   05 44 05.7   +16 15 36     1.927    2.806  146.7   11.2   279   13.5 
2025-11-17 00:00 UT   05 43 23.2   +16 14 12     1.920    2.807  147.8   10.8   280   13.4 
2025-11-18 00:00 UT   05 42 39.3   +16 12 50     1.914    2.808  149.0   10.5   280   13.4 
2025-11-19 00:00 UT   05 41 54.0   +16 11 30     1.909    2.809  150.1   10.1   281   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.