(556) Phyllis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	9 May 2026	13.3	2.645 AU	1.688 AU	16h32m	-27°41'	156.6°	8.7°
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)                : 87.62954
            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
2026-05-09 00:00 UT   16 32 54.3   -27 41 47     1.688    2.645  156.6    8.7   292   13.3 
2026-05-09 10:47 UT   16 32 30.9   -27 40 50     1.686    2.645  157.1    8.5   292   13.3 
2026-05-10 00:00 UT   16 32 01.9   -27 39 39     1.683    2.645  157.8    8.3   293   13.3 
2026-05-11 00:00 UT   16 31 08.3   -27 37 25     1.679    2.646  158.9    7.9   294   13.3 
2026-05-12 00:00 UT   16 30 13.7   -27 35 03     1.675    2.647  160.0    7.5   295   13.3 
2026-05-13 00:00 UT   16 29 18.0   -27 32 35     1.671    2.648  161.1    7.1   296   13.3 
2026-05-14 00:00 UT   16 28 21.4   -27 29 60     1.668    2.648  162.3    6.7   297   13.2 
2026-05-15 00:00 UT   16 27 24.0   -27 27 18     1.665    2.649  163.4    6.3   298   13.2 
2026-05-16 00:00 UT   16 26 25.7   -27 24 29     1.662    2.650  164.5    5.9   300   13.2 
2026-05-17 00:00 UT   16 25 26.6   -27 21 34     1.659    2.651  165.6    5.4   302   13.2 
2026-05-18 00:00 UT   16 24 26.9   -27 18 32     1.657    2.651  166.7    5.0   304   13.1 
2026-05-19 00:00 UT   16 23 26.6   -27 15 23     1.655    2.652  167.8    4.6   306   13.1 
2026-05-20 00:00 UT   16 22 25.8   -27 12 09     1.653    2.653  168.8    4.2   309   13.1 
2026-05-21 00:00 UT   16 21 24.5   -27 08 48     1.651    2.653  169.9    3.9   313   13.1 
2026-05-22 00:00 UT   16 20 22.9   -27 05 21     1.650    2.654  170.8    3.5   317   13.0 
2026-05-23 00:00 UT   16 19 21.0   -27 01 48     1.649    2.655  171.8    3.1   322   13.0 
2026-05-24 00:00 UT   16 18 18.9   -26 58 09     1.648    2.656  172.6    2.8   328   13.0 
2026-05-25 00:00 UT   16 17 16.6   -26 54 25     1.648    2.656  173.4    2.5   336   13.0 
2026-05-26 00:00 UT   16 16 14.3   -26 50 35     1.647    2.657  174.0    2.3   345   13.0 
2026-05-27 00:00 UT   16 15 12.0   -26 46 41     1.648    2.658  174.4    2.1   357   13.0 
2026-05-28 00:00 UT   16 14 09.8   -26 42 41     1.648    2.658  174.6    2.1     9   12.9 
2026-05-29 00:00 UT   16 13 07.7   -26 38 37     1.648    2.659  174.5    2.1    22   13.0 
2026-05-30 00:00 UT   16 12 05.9   -26 34 28     1.649    2.660  174.2    2.2    34   13.0 
2026-05-31 00:00 UT   16 11 04.3   -26 30 15     1.650    2.660  173.6    2.4    44   13.0 
2026-06-01 00:00 UT   16 10 03.1   -26 25 58     1.652    2.661  172.9    2.7    52   13.0 
2026-06-02 00:00 UT   16 09 02.4   -26 21 37     1.654    2.662  172.1    3.0    59   13.0 
2026-06-03 00:00 UT   16 08 02.1   -26 17 13     1.656    2.662  171.2    3.3    64   13.0 
2026-06-04 00:00 UT   16 07 02.5   -26 12 46     1.658    2.663  170.2    3.7    69   13.1 
2026-06-05 00:00 UT   16 06 03.4   -26 08 16     1.660    2.664  169.2    4.1    73   13.1 
2026-06-06 00:00 UT   16 05 05.1   -26 03 43     1.663    2.664  168.2    4.5    76   13.1 
2026-06-07 00:00 UT   16 04 07.5   -25 59 08     1.666    2.665  167.1    4.9    78   13.2 
2026-06-08 00:00 UT   16 03 10.7   -25 54 31     1.669    2.666  166.0    5.3    80   13.2 

    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.