(556) Phyllis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	13 Jan 2025	11.8	2.211 AU	1.228 AU	07h40m	+20°13'	178.8°	0.5°
Today	5 Feb 2025	12.6	2.217 AU	1.296 AU	07h18m	+19°57'	152.3°	11.9°

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)                : 0.1043650
            a (Semimajor axis)              : 2.4649914
            i (Inclination)                 : 5.24845
            Ω (Longitude of ascending node) : 285.97184
            ω (Argument of perihelion)      : 177.21230
            M (Mean anomaly)                : 345.65584
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 283.19581
            B (Latitude of perihelion)      : 0.25490
            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
2025-02-05 00:00 UT   07 18 31.1   +19 57 40     1.296    2.217  152.3   11.9    93   12.6 
2025-02-05 06:50 UT   07 18 19.1   +19 57 24     1.298    2.217  151.9   12.1    93   12.6 
2025-02-06 00:00 UT   07 17 49.9   +19 56 42     1.302    2.217  151.1   12.4    94   12.6 
2025-02-07 00:00 UT   07 17 10.6   +19 55 43     1.309    2.218  149.9   12.9    94   12.6 
2025-02-08 00:00 UT   07 16 33.3   +19 54 42     1.315    2.218  148.8   13.3    94   12.6 
2025-02-09 00:00 UT   07 15 58.0   +19 53 40     1.321    2.219  147.6   13.8    94   12.7 
2025-02-10 00:00 UT   07 15 24.6   +19 52 37     1.328    2.219  146.5   14.2    94   12.7 
2025-02-11 00:00 UT   07 14 53.3   +19 51 32     1.335    2.219  145.4   14.6    94   12.7 
2025-02-12 00:00 UT   07 14 24.0   +19 50 27     1.342    2.220  144.2   15.1    94   12.7 
2025-02-13 00:00 UT   07 13 56.7   +19 49 20     1.350    2.220  143.1   15.5    94   12.8 
2025-02-14 00:00 UT   07 13 31.6   +19 48 11     1.357    2.220  142.0   15.9    94   12.8 
2025-02-15 00:00 UT   07 13 08.5   +19 47 02     1.365    2.221  140.9   16.3    94   12.8 
2025-02-16 00:00 UT   07 12 47.6   +19 45 51     1.373    2.221  139.8   16.7    94   12.9 
2025-02-17 00:00 UT   07 12 28.7   +19 44 39     1.381    2.222  138.8   17.1    94   12.9 
2025-02-18 00:00 UT   07 12 12.0   +19 43 26     1.389    2.222  137.7   17.4    94   12.9 
2025-02-19 00:00 UT   07 11 57.4   +19 42 12     1.398    2.222  136.6   17.8    94   12.9 
2025-02-20 00:00 UT   07 11 45.0   +19 40 57     1.406    2.223  135.6   18.1    94   13.0 
2025-02-21 00:00 UT   07 11 34.6   +19 39 40     1.415    2.223  134.5   18.5    94   13.0 
2025-02-22 00:00 UT   07 11 26.4   +19 38 22     1.424    2.224  133.5   18.8    94   13.0 
2025-02-23 00:00 UT   07 11 20.4   +19 37 03     1.433    2.224  132.5   19.2    94   13.0 
2025-02-24 00:00 UT   07 11 16.4   +19 35 43     1.442    2.225  131.4   19.5    95   13.1 
2025-02-25 00:00 UT   07 11 14.6   +19 34 22     1.452    2.225  130.4   19.8    95   13.1 
2025-02-26 00:00 UT   07 11 14.9   +19 32 59     1.461    2.226  129.4   20.1    95   13.1 
2025-02-27 00:00 UT   07 11 17.3   +19 31 35     1.471    2.226  128.4   20.4    95   13.1 
2025-02-28 00:00 UT   07 11 21.8   +19 30 10     1.481    2.227  127.5   20.7    95   13.2 
2025-03-01 00:00 UT   07 11 28.4   +19 28 43     1.490    2.227  126.5   21.0    95   13.2 
2025-03-02 00:00 UT   07 11 37.0   +19 27 14     1.501    2.227  125.5   21.2    95   13.2 
2025-03-03 00:00 UT   07 11 47.7   +19 25 45     1.511    2.228  124.6   21.5    95   13.2 
2025-03-04 00:00 UT   07 12 00.5   +19 24 13     1.521    2.228  123.6   21.8    95   13.2 
2025-03-05 00:00 UT   07 12 15.2   +19 22 40     1.531    2.229  122.7   22.0    95   13.3 
2025-03-06 00:00 UT   07 12 31.9   +19 21 06     1.542    2.229  121.7   22.2    95   13.3 
2025-03-07 00:00 UT   07 12 50.6   +19 19 29     1.552    2.230  120.8   22.5    95   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.