116 Sirona

116 Sirona
3D convex shape model of 116 Sirona
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date8 September 1871
Designations
(116) Sirona
Pronunciation/ˈsɪroʊnə/
Named after
Đīrona
A871 RA; 1954 UC3;
1998 EK13; 1998 ES21
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc143.31 yr (52345 d)
Aphelion3.1616 AU (472.97 Gm)
Perihelion2.37322 AU (355.029 Gm)
2.76741 AU (413.999 Gm)
Eccentricity0.14244
4.60 yr (1681.5 d)
17.81 km/s
7.59231°
0° 12m 50.724s / day
Inclination3.5635°
63.724°
94.932°
Earth MOID1.38451 AU (207.120 Gm)
Jupiter MOID1.83156 AU (273.997 Gm)
TJupiter3.321
Physical characteristics
Dimensions71.70±5.8 km
Mass3.9×1017 kg
Equatorial surface gravity
0.0200 m/s2
Equatorial escape velocity
0.0379 km/s
12.028 h (0.5012 d)[1][2]
0.2560±0.047
Temperature~167 K
S
7.82[1][2]

116 Sirona is a somewhat large and bright-colored main-belt asteroid that was discovered by the German-American astronomer C. H. F. Peters on September 8, 1871, and named after Sirona, the Celtic goddess of healing.[3]

This body is orbiting the Sun with a period of 4.60 years and an eccentricity (ovalness) of 0.14. The orbital plane is inclined by 3.56° to the plane of the ecliptic. The cross-section diameter of this object is ~72 km. Photometric observations of this asteroid gave a light curve with a period of 12.028 hours and a brightness variation of 0.42 in magnitude.[2] It has the spectrum of an S-type asteroid, suggesting a siliceous composition.

References

  1. ^ a b c Yeomans, Donald K., "116 Sirona", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
  2. ^ a b c Zeigler, K. W.; Florence, W. B. (June 1985), "Photoelectric photometry of asteroids 9 Metis, 18 Melpomene, 60 Echo, 116 Sirona, 230 Athamantis, 694 Ekard, and 1984 KD", Icarus, vol. 62, pp. 512–517, Bibcode:1985Icar...62..512Z, doi:10.1016/0019-1035(85)90191-5.
  3. ^ Schmadel, Lutz D. (2003), Dictionary of Minor Planet Names (5th ed.), Springer, p. 26, ISBN 3540002383.


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