(199) Byblis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Jun 2026	11.9	2.583 AU	1.577 AU	17h55m	-21°51'	169.8°	4.0°
Opposition	18 Jun 2026	11.6	2.582 AU	1.566 AU	17h47m	-22°46'	179.3°	0.3°

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 Byblis are:

            e (Eccentricity)                : 0.1833995
            a (Semimajor axis)              : 3.1618400
            i (Inclination)                 : 15.47938
            Ω (Longitude of ascending node) : 88.41749
            ω (Argument of perihelion)      : 179.43812
            M (Mean anomaly)                : 322.68638
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 87.87599
            B (Latitude of perihelion)      : 0.14996
            P (Orbital period in years)     : 5.62            
        

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
2026-06-10 00:00 UT   17 55 07.5   -21 51 10     1.577    2.583  169.8    4.0   262   11.9 
2026-06-10 03:20 UT   17 55 00.4   -21 52 04     1.577    2.583  170.0    3.9   262   11.9 
2026-06-11 00:00 UT   17 54 15.6   -21 57 42     1.575    2.582  171.0    3.5   261   11.9 
2026-06-12 00:00 UT   17 53 23.1   -22 04 14     1.573    2.582  172.1    3.1   261   11.9 
2026-06-13 00:00 UT   17 52 30.0   -22 10 47     1.571    2.582  173.3    2.6   260   11.8 
2026-06-14 00:00 UT   17 51 36.4   -22 17 21     1.570    2.582  174.4    2.2   259   11.8 
2026-06-15 00:00 UT   17 50 42.4   -22 23 55     1.568    2.582  175.6    1.7   258   11.8 
2026-06-16 00:00 UT   17 49 48.0   -22 30 29     1.567    2.582  176.8    1.3   255   11.7 
2026-06-17 00:00 UT   17 48 53.3   -22 37 02     1.567    2.582  177.9    0.8   249   11.7 
2026-06-18 00:00 UT   17 47 58.4   -22 43 36     1.566    2.582  179.0    0.4   231   11.6 
2026-06-19 00:00 UT   17 47 03.4   -22 50 09     1.566    2.582  179.3    0.3   148   11.6 
2026-06-20 00:00 UT   17 46 08.3   -22 56 40     1.566    2.582  178.4    0.6   108   11.7 
2026-06-21 00:00 UT   17 45 13.3   -23 03 11     1.566    2.582  177.3    1.1    99   11.7 
2026-06-22 00:00 UT   17 44 18.3   -23 09 41     1.567    2.582  176.1    1.5    95   11.8 
2026-06-23 00:00 UT   17 43 23.5   -23 16 10     1.568    2.582  175.0    2.0    93   11.8 
2026-06-24 00:00 UT   17 42 28.9   -23 22 36     1.569    2.582  173.8    2.4    92   11.8 
2026-06-25 00:00 UT   17 41 34.6   -23 29 01     1.571    2.582  172.7    2.9    91   11.9 
2026-06-26 00:00 UT   17 40 40.6   -23 35 25     1.572    2.582  171.5    3.3    90   11.9 
2026-06-27 00:00 UT   17 39 47.1   -23 41 46     1.574    2.582  170.3    3.8    90   11.9 
2026-06-28 00:00 UT   17 38 54.1   -23 48 05     1.577    2.582  169.2    4.2    90   11.9 
2026-06-29 00:00 UT   17 38 01.6   -23 54 22     1.579    2.582  168.0    4.7    89   12.0 
2026-06-30 00:00 UT   17 37 09.7   -24 00 36     1.582    2.582  166.9    5.1    89   12.0 
2026-07-01 00:00 UT   17 36 18.6   -24 06 48     1.585    2.582  165.7    5.6    89   12.0 
2026-07-02 00:00 UT   17 35 28.1   -24 12 57     1.588    2.582  164.6    6.0    89   12.1 
2026-07-03 00:00 UT   17 34 38.5   -24 19 03     1.592    2.582  163.5    6.4    89   12.1 
2026-07-04 00:00 UT   17 33 49.7   -24 25 07     1.595    2.583  162.3    6.9    89   12.1 
2026-07-05 00:00 UT   17 33 01.9   -24 31 07     1.599    2.583  161.2    7.3    89   12.1 
2026-07-06 00:00 UT   17 32 15.0   -24 37 05     1.604    2.583  160.1    7.7    89   12.2 
2026-07-07 00:00 UT   17 31 29.2   -24 42 59     1.608    2.583  158.9    8.1    89   12.2 
2026-07-08 00:00 UT   17 30 44.4   -24 48 51     1.613    2.583  157.8    8.6    89   12.2 
2026-07-09 00:00 UT   17 30 00.8   -24 54 39     1.618    2.583  156.7    9.0    89   12.2 
2026-07-10 00:00 UT   17 29 18.4   -25 00 25     1.623    2.583  155.6    9.4    89   12.3 

    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.