(556) Phyllis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	11 Jan 2026	14.9	2.536 AU	2.944 AU	15h22m	-22°55'	56.4°	18.9°
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)                : 0.1038903
            a (Semimajor axis)              : 2.4639024
            i (Inclination)                 : 5.24942
            Ω (Longitude of ascending node) : 285.97117
            ω (Argument of perihelion)      : 177.16344
            M (Mean anomaly)                : 87.62953
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 283.14649
            B (Latitude of perihelion)      : 0.25942
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-01-11 00:00 UT   15 22 16.5   -22 55 36     2.944    2.536   56.4   18.9   282   14.9 
2026-01-11 15:02 UT   15 23 15.6   -22 59 33     2.938    2.537   56.8   18.9   282   14.9 
2026-01-12 00:00 UT   15 23 50.8   -23 01 54     2.934    2.537   57.1   19.0   282   14.9 
2026-01-13 00:00 UT   15 25 24.7   -23 08 07     2.924    2.538   57.7   19.1   282   14.9 
2026-01-14 00:00 UT   15 26 58.2   -23 14 16     2.913    2.539   58.3   19.3   282   14.9 
2026-01-15 00:00 UT   15 28 31.3   -23 20 21     2.903    2.540   59.0   19.4   282   14.8 
2026-01-16 00:00 UT   15 30 03.9   -23 26 22     2.892    2.541   59.6   19.5   282   14.8 
2026-01-17 00:00 UT   15 31 36.0   -23 32 18     2.882    2.542   60.3   19.6   281   14.8 
2026-01-18 00:00 UT   15 33 07.7   -23 38 09     2.871    2.543   60.9   19.8   281   14.8 
2026-01-19 00:00 UT   15 34 38.9   -23 43 57     2.861    2.544   61.6   19.9   281   14.8 
2026-01-20 00:00 UT   15 36 09.6   -23 49 40     2.850    2.545   62.3   20.0   281   14.8 
2026-01-21 00:00 UT   15 37 39.8   -23 55 19     2.839    2.546   62.9   20.1   281   14.8 
2026-01-22 00:00 UT   15 39 09.5   -24 00 53     2.828    2.547   63.6   20.2   281   14.8 
2026-01-23 00:00 UT   15 40 38.6   -24 06 23     2.817    2.549   64.2   20.4   281   14.8 
2026-01-24 00:00 UT   15 42 07.2   -24 11 49     2.806    2.550   64.9   20.5   281   14.8 
2026-01-25 00:00 UT   15 43 35.2   -24 17 10     2.795    2.551   65.6   20.6   281   14.8 
2026-01-26 00:00 UT   15 45 02.7   -24 22 27     2.784    2.552   66.2   20.7   281   14.8 
2026-01-27 00:00 UT   15 46 29.5   -24 27 40     2.773    2.553   66.9   20.8   281   14.8 
2026-01-28 00:00 UT   15 47 55.8   -24 32 49     2.761    2.554   67.6   20.9   281   14.8 
2026-01-29 00:00 UT   15 49 21.5   -24 37 53     2.750    2.555   68.3   21.0   281   14.8 
2026-01-30 00:00 UT   15 50 46.5   -24 42 54     2.739    2.556   68.9   21.1   281   14.8 
2026-01-31 00:00 UT   15 52 11.0   -24 47 50     2.727    2.557   69.6   21.2   281   14.8 
2026-02-01 00:00 UT   15 53 34.7   -24 52 42     2.716    2.558   70.3   21.3   280   14.8 
2026-02-02 00:00 UT   15 54 57.8   -24 57 29     2.704    2.559   71.0   21.4   280   14.8 
2026-02-03 00:00 UT   15 56 20.3   -25 02 13     2.692    2.560   71.7   21.4   280   14.8 
2026-02-04 00:00 UT   15 57 42.0   -25 06 53     2.681    2.561   72.4   21.5   280   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.