(556) Phyllis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Jul 2025	14.6	2.336 AU	3.024 AU	10h11m	+07°23'	39.8°	16.2°
Opposition	27 May 2026	13.0	2.658 AU	1.648 AU	16h14m	-26°44'	174.5°	2.1°

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 Phyllis are:

            e (Eccentricity)                : 0.1039774
            a (Semimajor axis)              : 2.4639308
            i (Inclination)                 : 5.24945
            Ω (Longitude of ascending node) : 285.97209
            ω (Argument of perihelion)      : 177.14379
            M (Mean anomaly)                : 36.67064
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 283.12784
            B (Latitude of perihelion)      : 0.26121
            P (Orbital period in years)     : 3.87            
        

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
2025-07-15 00:00 UT   10 11 02.8   +07 23 09     3.024    2.336   39.8   16.2   115   14.6 
2025-07-15 20:24 UT   10 12 31.5   +07 14 45     3.032    2.336   39.4   16.0   115   14.6 
2025-07-16 00:00 UT   10 12 47.2   +07 13 16     3.033    2.337   39.3   16.0   115   14.6 
2025-07-17 00:00 UT   10 14 31.6   +07 03 20     3.041    2.338   38.8   15.8   115   14.7 
2025-07-18 00:00 UT   10 16 16.1   +06 53 22     3.050    2.339   38.3   15.6   116   14.7 
2025-07-19 00:00 UT   10 18 00.6   +06 43 20     3.058    2.340   37.8   15.4   116   14.7 
2025-07-20 00:00 UT   10 19 45.2   +06 33 16     3.066    2.341   37.3   15.3   116   14.7 
2025-07-21 00:00 UT   10 21 29.8   +06 23 08     3.074    2.342   36.8   15.1   116   14.7 
2025-07-22 00:00 UT   10 23 14.3   +06 12 58     3.082    2.343   36.4   14.9   116   14.7 
2025-07-23 00:00 UT   10 24 59.0   +06 02 45     3.090    2.344   35.9   14.7   116   14.7 
2025-07-24 00:00 UT   10 26 43.6   +05 52 29     3.098    2.345   35.4   14.5   117   14.7 
2025-07-25 00:00 UT   10 28 28.3   +05 42 11     3.106    2.346   34.9   14.3   117   14.7 
2025-07-26 00:00 UT   10 30 13.0   +05 31 50     3.114    2.347   34.4   14.2   117   14.7 
2025-07-27 00:00 UT   10 31 57.7   +05 21 26     3.121    2.348   33.9   14.0   117   14.7 
2025-07-28 00:00 UT   10 33 42.4   +05 10 60     3.129    2.349   33.4   13.8   117   14.7 
2025-07-29 00:00 UT   10 35 27.1   +05 00 31     3.136    2.350   33.0   13.6   117   14.7 
2025-07-30 00:00 UT   10 37 11.8   +04 50 00     3.144    2.351   32.5   13.4   118   14.7 
2025-07-31 00:00 UT   10 38 56.6   +04 39 27     3.151    2.352   32.0   13.2   118   14.6 
2025-08-01 00:00 UT   10 40 41.3   +04 28 51     3.158    2.354   31.5   13.0   118   14.6 
2025-08-02 00:00 UT   10 42 26.0   +04 18 14     3.165    2.355   31.0   12.8   118   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.