(335) Roberta
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 Nov 2025	13.2	2.817 AU	1.872 AU	05h35m	+16°01'	159.4°	7.1°
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
2025-11-27 00:00 UT   05 35 07.7   +16 01 60     1.872    2.817  159.4    7.1   287   13.2 
2025-11-27 18:24 UT   05 34 25.2   +16 01 13     1.870    2.818  160.3    6.8   288   13.2 
2025-11-28 00:00 UT   05 34 12.2   +16 00 58     1.869    2.818  160.5    6.7   289   13.2 
2025-11-29 00:00 UT   05 33 15.7   +15 59 59     1.866    2.819  161.7    6.3   290   13.2 
2025-11-30 00:00 UT   05 32 18.5   +15 59 02     1.863    2.820  162.8    5.9   292   13.2 
2025-12-01 00:00 UT   05 31 20.5   +15 58 08     1.860    2.821  163.9    5.6   293   13.1 
2025-12-02 00:00 UT   05 30 21.8   +15 57 16     1.858    2.822  165.0    5.2   296   13.1 
2025-12-03 00:00 UT   05 29 22.5   +15 56 26     1.856    2.823  166.1    4.8   298   13.1 
2025-12-04 00:00 UT   05 28 22.6   +15 55 39     1.855    2.824  167.1    4.5   301   13.1 
2025-12-05 00:00 UT   05 27 22.2   +15 54 55     1.853    2.825  168.2    4.1   304   13.1 
2025-12-06 00:00 UT   05 26 21.3   +15 54 13     1.852    2.826  169.1    3.8   308   13.0 
2025-12-07 00:00 UT   05 25 20.1   +15 53 34     1.851    2.827  170.0    3.5   313   13.0 
2025-12-08 00:00 UT   05 24 18.5   +15 52 57     1.851    2.828  170.8    3.2   319   13.0 
2025-12-09 00:00 UT   05 23 16.6   +15 52 24     1.851    2.829  171.5    2.9   326   13.0 
2025-12-10 00:00 UT   05 22 14.6   +15 51 53     1.851    2.830  172.1    2.7   333   13.0 
2025-12-11 00:00 UT   05 21 12.4   +15 51 25     1.851    2.831  172.5    2.6   342   13.0 
2025-12-12 00:00 UT   05 20 10.2   +15 50 59     1.852    2.831  172.7    2.5   352   13.0 
2025-12-13 00:00 UT   05 19 08.0   +15 50 37     1.853    2.832  172.7    2.5     2   13.0 
2025-12-14 00:00 UT   05 18 05.9   +15 50 18     1.854    2.833  172.5    2.6    12   13.0 
2025-12-15 00:00 UT   05 17 03.9   +15 50 02     1.856    2.834  172.1    2.7    20   13.0 
2025-12-16 00:00 UT   05 16 02.1   +15 49 49     1.858    2.835  171.5    2.9    28   13.0 
2025-12-17 00:00 UT   05 15 00.7   +15 49 40     1.860    2.836  170.8    3.2    35   13.0 
2025-12-18 00:00 UT   05 13 59.6   +15 49 33     1.863    2.837  169.9    3.5    40   13.1 
2025-12-19 00:00 UT   05 12 58.9   +15 49 30     1.865    2.838  169.0    3.8    45   13.1 
2025-12-20 00:00 UT   05 11 58.7   +15 49 30     1.869    2.838  168.0    4.1    49   13.1 
2025-12-21 00:00 UT   05 10 59.1   +15 49 34     1.872    2.839  167.0    4.5    52   13.1 
2025-12-22 00:00 UT   05 10 00.1   +15 49 41     1.876    2.840  166.0    4.8    55   13.1 
2025-12-23 00:00 UT   05 09 01.7   +15 49 52     1.880    2.841  164.9    5.2    58   13.2 
2025-12-24 00:00 UT   05 08 04.2   +15 50 06     1.884    2.842  163.8    5.5    60   13.2 
2025-12-25 00:00 UT   05 07 07.4   +15 50 23     1.889    2.843  162.7    5.9    62   13.2 
2025-12-26 00:00 UT   05 06 11.5   +15 50 45     1.893    2.843  161.5    6.3    63   13.2 
2025-12-27 00:00 UT   05 05 16.6   +15 51 09     1.899    2.844  160.4    6.7    65   13.3 

    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.