(116) Sirona
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Jul 2026	12.7	2.673 AU	2.250 AU	14h27m	-14°22'	103.2°	21.7°
Opposition	7 Aug 2027	12.1	3.111 AU	2.099 AU	21h14m	-21°12'	175.0°	1.6°

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 Sirona are:

            e (Eccentricity)                : 0.1380740
            a (Semimajor axis)              : 2.7687062
            i (Inclination)                 : 3.56124
            Ω (Longitude of ascending node) : 63.67583
            ω (Argument of perihelion)      : 94.01519
            M (Mean anomaly)                : 59.23197
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : -22.30124
            B (Latitude of perihelion)      : 3.55249
            P (Orbital period in years)     : 4.61            
        

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
2026-07-19 00:00 UT   14 27 37.3   -14 22 57     2.250    2.673  103.2   21.7   109   12.7 
2026-07-19 15:47 UT   14 28 02.4   -14 25 44     2.259    2.674  102.7   21.8   109   12.7 
2026-07-20 00:00 UT   14 28 15.7   -14 27 11     2.264    2.674  102.4   21.8   109   12.7 
2026-07-21 00:00 UT   14 28 55.2   -14 31 30     2.278    2.676  101.7   21.8   108   12.8 
2026-07-22 00:00 UT   14 29 35.8   -14 35 52     2.292    2.677  100.9   21.9   108   12.8 
2026-07-23 00:00 UT   14 30 17.5   -14 40 19     2.306    2.678  100.1   21.9   108   12.8 
2026-07-24 00:00 UT   14 31 00.3   -14 44 49     2.320    2.680   99.3   22.0   108   12.8 
2026-07-25 00:00 UT   14 31 44.1   -14 49 23     2.334    2.681   98.6   22.0   108   12.8 
2026-07-26 00:00 UT   14 32 29.0   -14 53 60     2.349    2.683   97.8   22.0   108   12.8 
2026-07-27 00:00 UT   14 33 14.9   -14 58 41     2.363    2.684   97.1   22.1   108   12.8 
2026-07-28 00:00 UT   14 34 01.8   -15 03 25     2.377    2.686   96.3   22.1   108   12.9 
2026-07-29 00:00 UT   14 34 49.7   -15 08 12     2.391    2.687   95.6   22.1   108   12.9 
2026-07-30 00:00 UT   14 35 38.6   -15 13 02     2.405    2.688   94.8   22.1   108   12.9 
2026-07-31 00:00 UT   14 36 28.5   -15 17 56     2.420    2.690   94.1   22.1   108   12.9 
2026-08-01 00:00 UT   14 37 19.3   -15 22 52     2.434    2.691   93.4   22.1   108   12.9 
2026-08-02 00:00 UT   14 38 11.0   -15 27 51     2.448    2.693   92.6   22.1   108   12.9 
2026-08-03 00:00 UT   14 39 03.7   -15 32 53     2.463    2.694   91.9   22.1   108   12.9 
2026-08-04 00:00 UT   14 39 57.3   -15 37 57     2.477    2.696   91.2   22.1   108   13.0 
2026-08-05 00:00 UT   14 40 51.9   -15 43 04     2.491    2.697   90.4   22.1   108   13.0 
2026-08-06 00:00 UT   14 41 47.3   -15 48 14     2.506    2.698   89.7   22.1   108   13.0 
2026-08-07 00:00 UT   14 42 43.6   -15 53 25     2.520    2.700   89.0   22.1   108   13.0 
2026-08-08 00:00 UT   14 43 40.8   -15 58 39     2.534    2.701   88.3   22.0   107   13.0 
2026-08-09 00:00 UT   14 44 38.8   -16 03 55     2.549    2.703   87.6   22.0   107   13.0 
2026-08-10 00:00 UT   14 45 37.7   -16 09 14     2.563    2.704   86.9   22.0   107   13.0 
2026-08-11 00:00 UT   14 46 37.5   -16 14 34     2.577    2.706   86.2   21.9   107   13.0 
2026-08-12 00:00 UT   14 47 38.1   -16 19 56     2.592    2.707   85.5   21.9   107   13.1 
2026-08-13 00:00 UT   14 48 39.5   -16 25 20     2.606    2.709   84.8   21.9   107   13.1 
2026-08-14 00:00 UT   14 49 41.7   -16 30 46     2.620    2.710   84.1   21.8   107   13.1 
2026-08-15 00:00 UT   14 50 44.8   -16 36 13     2.635    2.711   83.4   21.8   107   13.1 
2026-08-16 00:00 UT   14 51 48.6   -16 41 41     2.649    2.713   82.7   21.7   107   13.1 
2026-08-17 00:00 UT   14 52 53.2   -16 47 11     2.663    2.714   82.0   21.7   107   13.1 
2026-08-18 00:00 UT   14 53 58.6   -16 52 43     2.678    2.716   81.3   21.6   107   13.1 

    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.