(335) Roberta
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Sep 2026	14.8	2.858 AU	3.694 AU	09h30m	+13°28'	29.2°	9.9°
Opposition	6 Mar 2027	12.4	2.652 AU	1.661 AU	11h10m	+07°53'	177.6°	0.9°

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)                : 0.1709091
            a (Semimajor axis)              : 2.4779969
            i (Inclination)                 : 5.10518
            Ω (Longitude of ascending node) : 148.35687
            ω (Argument of perihelion)      : 140.15574
            M (Mean anomaly)                : 186.31860
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 108.62460
            B (Latitude of perihelion)      : 3.26835
            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
2026-09-13 00:00 UT   09 30 41.2   +13 28 07     3.694    2.858   29.2    9.9   286   14.8 
2026-09-13 02:19 UT   09 30 49.7   +13 27 29     3.693    2.858   29.3    9.9   286   14.8 
2026-09-14 00:00 UT   09 32 09.3   +13 21 35     3.686    2.857   29.8   10.1   286   14.8 
2026-09-15 00:00 UT   09 33 37.2   +13 15 02     3.678    2.856   30.4   10.3   287   14.8 
2026-09-16 00:00 UT   09 35 04.9   +13 08 28     3.670    2.856   31.0   10.5   287   14.8 
2026-09-17 00:00 UT   09 36 32.3   +13 01 53     3.662    2.855   31.6   10.6   287   14.8 
2026-09-18 00:00 UT   09 37 59.6   +12 55 16     3.654    2.854   32.2   10.8   287   14.9 
2026-09-19 00:00 UT   09 39 26.5   +12 48 38     3.645    2.853   32.8   11.0   287   14.9 
2026-09-20 00:00 UT   09 40 53.3   +12 41 60     3.637    2.853   33.4   11.2   287   14.9 
2026-09-21 00:00 UT   09 42 19.8   +12 35 20     3.628    2.852   34.1   11.4   288   14.9 
2026-09-22 00:00 UT   09 43 46.0   +12 28 39     3.619    2.851   34.7   11.6   288   14.9 
2026-09-23 00:00 UT   09 45 12.0   +12 21 58     3.610    2.850   35.3   11.7   288   14.9 
2026-09-24 00:00 UT   09 46 37.8   +12 15 15     3.601    2.850   35.9   11.9   288   14.9 
2026-09-25 00:00 UT   09 48 03.3   +12 08 32     3.592    2.849   36.5   12.1   288   14.9 
2026-09-26 00:00 UT   09 49 28.5   +12 01 48     3.583    2.848   37.1   12.3   288   14.9 
2026-09-27 00:00 UT   09 50 53.5   +11 55 04     3.573    2.847   37.7   12.4   288   14.9 
2026-09-28 00:00 UT   09 52 18.3   +11 48 18     3.564    2.846   38.3   12.6   288   14.9 
2026-09-29 00:00 UT   09 53 42.7   +11 41 33     3.554    2.846   39.0   12.8   289   14.9 
2026-09-30 00:00 UT   09 55 06.9   +11 34 46     3.544    2.845   39.6   13.0   289   14.9 
2026-10-01 00:00 UT   09 56 30.9   +11 27 59     3.534    2.844   40.2   13.1   289   14.9 
2026-10-02 00:00 UT   09 57 54.5   +11 21 12     3.524    2.843   40.8   13.3   289   14.9 
2026-10-03 00:00 UT   09 59 17.9   +11 14 24     3.514    2.842   41.4   13.5   289   14.9 
2026-10-04 00:00 UT   10 00 41.0   +11 07 37     3.504    2.842   42.1   13.6   289   14.9 
2026-10-05 00:00 UT   10 02 03.8   +11 00 48     3.494    2.841   42.7   13.8   289   14.9 
2026-10-06 00:00 UT   10 03 26.4   +10 54 00     3.483    2.840   43.3   14.0   289   14.9 

    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.