(218) Bianca
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	9 Jul 2025	14.6	2.973 AU	3.727 AU	04h46m	+10°56'	36.6°	11.8°
Opposition	23 Dec 2025	13.0	2.893 AU	1.959 AU	06h08m	+01°05'	157.7°	7.4°

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 Bianca are:

            e (Eccentricity)                : 0.1159638
            a (Semimajor axis)              : 2.6673797
            i (Inclination)                 : 15.19596
            Ω (Longitude of ascending node) : 170.54892
            ω (Argument of perihelion)      : 62.34838
            M (Mean anomaly)                : 175.00112
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 232.05058
            B (Latitude of perihelion)      : 13.42564
            P (Orbital period in years)     : 4.36            
        

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
2025-07-09 00:00 UT   04 46 46.4   +10 56 29     3.727    2.973   36.6   11.8   247   14.6 
2025-07-09 04:34 UT   04 47 02.9   +10 56 35     3.725    2.973   36.7   11.8   247   14.6 
2025-07-10 00:00 UT   04 48 13.4   +10 56 58     3.719    2.973   37.2   11.9   247   14.6 
2025-07-11 00:00 UT   04 49 40.2   +10 57 22     3.711    2.973   37.7   12.1   248   14.6 
2025-07-12 00:00 UT   04 51 06.8   +10 57 41     3.703    2.973   38.3   12.2   248   14.6 
2025-07-13 00:00 UT   04 52 33.2   +10 57 55     3.694    2.972   38.9   12.4   249   14.6 
2025-07-14 00:00 UT   04 53 59.4   +10 58 04     3.686    2.972   39.5   12.6   249   14.6 
2025-07-15 00:00 UT   04 55 25.4   +10 58 08     3.677    2.972   40.0   12.7   249   14.6 
2025-07-16 00:00 UT   04 56 51.2   +10 58 07     3.669    2.972   40.6   12.9   250   14.6 
2025-07-17 00:00 UT   04 58 16.7   +10 58 01     3.660    2.972   41.2   13.0   250   14.6 
2025-07-18 00:00 UT   04 59 42.0   +10 57 51     3.651    2.971   41.8   13.2   251   14.6 
2025-07-19 00:00 UT   05 01 07.0   +10 57 35     3.642    2.971   42.4   13.3   251   14.6 
2025-07-20 00:00 UT   05 02 31.8   +10 57 14     3.633    2.971   42.9   13.5   251   14.6 
2025-07-21 00:00 UT   05 03 56.4   +10 56 48     3.624    2.971   43.5   13.6   252   14.6 
2025-07-22 00:00 UT   05 05 20.6   +10 56 17     3.615    2.971   44.1   13.8   252   14.6 
2025-07-23 00:00 UT   05 06 44.6   +10 55 41     3.605    2.970   44.7   13.9   252   14.6 
2025-07-24 00:00 UT   05 08 08.3   +10 55 00     3.596    2.970   45.3   14.1   253   14.6 
2025-07-25 00:00 UT   05 09 31.7   +10 54 14     3.586    2.970   45.9   14.2   253   14.6 
2025-07-26 00:00 UT   05 10 54.8   +10 53 23     3.576    2.970   46.5   14.4   253   14.6 
2025-07-27 00:00 UT   05 12 17.6   +10 52 27     3.566    2.970   47.1   14.5   254   14.6 
2025-07-28 00:00 UT   05 13 40.1   +10 51 26     3.557    2.969   47.7   14.6   254   14.6 
2025-07-29 00:00 UT   05 15 02.3   +10 50 21     3.546    2.969   48.3   14.8   254   14.6 
2025-07-30 00:00 UT   05 16 24.1   +10 49 10     3.536    2.969   48.9   14.9   255   14.6 
2025-07-31 00:00 UT   05 17 45.6   +10 47 54     3.526    2.969   49.5   15.1   255   14.6 
2025-08-01 00:00 UT   05 19 06.8   +10 46 33     3.516    2.968   50.1   15.2   255   14.6 
2025-08-02 00:00 UT   05 20 27.5   +10 45 07     3.505    2.968   50.7   15.3   256   14.6 

    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.