(335) Roberta
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	14 Aug 2026	14.7	2.876 AU	3.860 AU	08h45m	+16°29'	11.7°	4.1°
Opposition	6 Mar 2027	12.4	2.649 AU	1.658 AU	11h11m	+07°51'	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)                : 0.1715271
            a (Semimajor axis)              : 2.4764198
            i (Inclination)                 : 5.10249
            Ω (Longitude of ascending node) : 148.39540
            ω (Argument of perihelion)      : 139.93854
            M (Mean anomaly)                : 135.98575
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 108.44597
            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
2026-08-14 00:00 UT   08 45 10.9   +16 29 14     3.860    2.876   11.7    4.1   278   14.7 
2026-08-14 01:16 UT   08 45 15.8   +16 28 57     3.860    2.876   11.7    4.1   278   14.7 
2026-08-15 00:00 UT   08 46 44.2   +16 23 46     3.857    2.875   12.3    4.3   278   14.7 
2026-08-16 00:00 UT   08 48 17.3   +16 18 14     3.853    2.875   12.8    4.5   279   14.7 
2026-08-17 00:00 UT   08 49 50.4   +16 12 40     3.849    2.874   13.4    4.7   279   14.7 
2026-08-18 00:00 UT   08 51 23.3   +16 07 03     3.845    2.874   14.0    4.9   280   14.7 
2026-08-19 00:00 UT   08 52 56.0   +16 01 24     3.841    2.873   14.6    5.1   280   14.7 
2026-08-20 00:00 UT   08 54 28.6   +15 55 42     3.837    2.872   15.1    5.3   281   14.7 
2026-08-21 00:00 UT   08 56 01.0   +15 49 58     3.833    2.872   15.7    5.5   281   14.7 
2026-08-22 00:00 UT   08 57 33.3   +15 44 11     3.828    2.871   16.3    5.7   281   14.7 
2026-08-23 00:00 UT   08 59 05.5   +15 38 21     3.823    2.871   16.9    5.9   282   14.7 
2026-08-24 00:00 UT   09 00 37.5   +15 32 30     3.818    2.870   17.5    6.1   282   14.8 
2026-08-25 00:00 UT   09 02 09.3   +15 26 36     3.814    2.869   18.0    6.3   282   14.8 
2026-08-26 00:00 UT   09 03 41.0   +15 20 39     3.808    2.869   18.6    6.5   283   14.8 
2026-08-27 00:00 UT   09 05 12.5   +15 14 41     3.803    2.868   19.2    6.7   283   14.8 
2026-08-28 00:00 UT   09 06 43.9   +15 08 40     3.798    2.868   19.8    6.8   283   14.8 
2026-08-29 00:00 UT   09 08 15.1   +15 02 37     3.792    2.867   20.4    7.0   283   14.8 
2026-08-30 00:00 UT   09 09 46.1   +14 56 32     3.786    2.866   20.9    7.2   284   14.8 
2026-08-31 00:00 UT   09 11 16.9   +14 50 25     3.781    2.866   21.5    7.4   284   14.8 
2026-09-01 00:00 UT   09 12 47.6   +14 44 15     3.775    2.865   22.1    7.6   284   14.8 
2026-09-02 00:00 UT   09 14 18.1   +14 38 04     3.769    2.864   22.7    7.8   284   14.8 
2026-09-03 00:00 UT   09 15 48.5   +14 31 51     3.762    2.864   23.3    8.0   284   14.8 
2026-09-04 00:00 UT   09 17 18.6   +14 25 35     3.756    2.863   23.9    8.2   285   14.8 
2026-09-05 00:00 UT   09 18 48.6   +14 19 18     3.749    2.862   24.5    8.4   285   14.8 

    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.