(116) Sirona
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 Mar 2026	11.8	2.519 AU	1.707 AU	15h10m	-14°58'	135.7°	16.1°
Opposition	3 May 2026	10.9	2.567 AU	1.559 AU	14h44m	-13°44'	177.9°	0.8°

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)                : 0.1380527
            a (Semimajor axis)              : 2.7683960
            i (Inclination)                 : 3.56136
            Ω (Longitude of ascending node) : 63.67472
            ω (Argument of perihelion)      : 93.95979
            M (Mean anomaly)                : 16.48865
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -22.35785
            B (Latitude of perihelion)      : 3.55285
            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
2026-03-26 00:00 UT   15 10 14.6   -14 58 24     1.707    2.519  135.7   16.1   283   11.8 
2026-03-26 03:11 UT   15 10 12.7   -14 58 20     1.706    2.519  135.8   16.0   283   11.8 
2026-03-27 00:00 UT   15 09 59.8   -14 57 49     1.699    2.520  136.7   15.8   283   11.8 
2026-03-28 00:00 UT   15 09 43.2   -14 57 09     1.691    2.521  137.8   15.4   283   11.8 
2026-03-29 00:00 UT   15 09 25.0   -14 56 23     1.684    2.522  138.8   15.1   283   11.7 
2026-03-30 00:00 UT   15 09 05.2   -14 55 32     1.677    2.524  139.9   14.8   283   11.7 
2026-03-31 00:00 UT   15 08 43.7   -14 54 36     1.669    2.525  141.0   14.4   282   11.7 
2026-04-01 00:00 UT   15 08 20.5   -14 53 34     1.662    2.526  142.0   14.1   282   11.7 
2026-04-02 00:00 UT   15 07 55.8   -14 52 27     1.656    2.527  143.1   13.7   282   11.7 
2026-04-03 00:00 UT   15 07 29.4   -14 51 15     1.649    2.528  144.2   13.4   282   11.6 
2026-04-04 00:00 UT   15 07 01.5   -14 49 58     1.643    2.530  145.3   13.0   282   11.6 
2026-04-05 00:00 UT   15 06 32.0   -14 48 36     1.636    2.531  146.4   12.6   282   11.6 
2026-04-06 00:00 UT   15 06 01.0   -14 47 09     1.630    2.532  147.5   12.3   282   11.6 
2026-04-07 00:00 UT   15 05 28.5   -14 45 37     1.625    2.533  148.6   11.9   282   11.6 
2026-04-08 00:00 UT   15 04 54.6   -14 44 00     1.619    2.535  149.8   11.5   282   11.5 
2026-04-09 00:00 UT   15 04 19.2   -14 42 19     1.614    2.536  150.9   11.1   281   11.5 
2026-04-10 00:00 UT   15 03 42.4   -14 40 33     1.609    2.537  152.0   10.7   281   11.5 
2026-04-11 00:00 UT   15 03 04.3   -14 38 43     1.604    2.538  153.1   10.3   281   11.5 
2026-04-12 00:00 UT   15 02 24.8   -14 36 49     1.599    2.539  154.3    9.9   281   11.5 
2026-04-13 00:00 UT   15 01 44.0   -14 34 50     1.595    2.541  155.4    9.4   281   11.4 
2026-04-14 00:00 UT   15 01 02.1   -14 32 48     1.590    2.542  156.6    9.0   281   11.4 
2026-04-15 00:00 UT   15 00 18.9   -14 30 42     1.586    2.543  157.7    8.6   280   11.4 
2026-04-16 00:00 UT   14 59 34.6   -14 28 32     1.583    2.545  158.9    8.2   280   11.4 
2026-04-17 00:00 UT   14 58 49.3   -14 26 19     1.579    2.546  160.0    7.7   280   11.3 
2026-04-18 00:00 UT   14 58 02.9   -14 24 02     1.576    2.547  161.2    7.3   279   11.3 
2026-04-19 00:00 UT   14 57 15.5   -14 21 43     1.573    2.548  162.4    6.9   279   11.3 
2026-04-20 00:00 UT   14 56 27.3   -14 19 21     1.570    2.550  163.5    6.4   279   11.3 
2026-04-21 00:00 UT   14 55 38.2   -14 16 56     1.568    2.551  164.7    6.0   278   11.2 
2026-04-22 00:00 UT   14 54 48.3   -14 14 29     1.566    2.552  165.9    5.5   277   11.2 
2026-04-23 00:00 UT   14 53 57.8   -14 11 59     1.564    2.553  167.0    5.1   277   11.2 
2026-04-24 00:00 UT   14 53 06.6   -14 09 28     1.562    2.555  168.2    4.6   276   11.2 
2026-04-25 00:00 UT   14 52 14.8   -14 06 56     1.561    2.556  169.4    4.2   275   11.1 

    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.