116 Sirona
Discovery | |
---|---|
Discovered by | Christian Heinrich Friedrich Peters |
Discovery date | 8 September 1871 |
Designations | |
MPC designation | (116) Sirona |
Pronunciation | /ˈsɪroʊnə/ |
Named after | Đīrona |
Minor planet category | Main belt |
Orbital characteristics[1] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 143.31 yr (52345 d) |
Aphelion | 3.1616 AU (472.97 Gm) |
Perihelion | 2.37322 AU (355.029 Gm) |
2.76741 AU (413.999 Gm) | |
Eccentricity | 0.14244 |
4.60 yr (1681.5 d) | |
Average orbital speed | 17.81 km/s |
7.59231° | |
0° 12m 50.724s / day | |
Inclination | 3.5635° |
63.724° | |
94.932° | |
Earth MOID | 1.38451 AU (207.120 Gm) |
Jupiter MOID | 1.83156 AU (273.997 Gm) |
TJupiter | 3.321 |
Physical characteristics | |
Dimensions | 71.70±5.8 km |
Mass | 3.9×1017 kg |
Equatorial surface gravity | 0.0200 m/s2 |
Equatorial escape velocity | 0.0379 km/s |
Synodic rotation period | 12.028 h (0.5012 d)[1][2] |
0.2560±0.047 | |
Temperature | ~167 K |
S | |
Absolute magnitude (H) | 7.82[1][2] |
Sirona (minor planet designation: 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[]
- ^ a b c Yeomans, Donald K., "116 Sirona", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ 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.
- ^ Schmadel, Lutz D. (2003), Dictionary of Minor Planet Names (5th ed.), Springer, p. 26, ISBN 3540002383.
External links[]
- 116 Sirona at AstDyS-2, Asteroids—Dynamic Site
- 116 Sirona at the JPL Small-Body Database
Categories:
- Minor planet object articles (numbered)
- Background asteroids
- Discoveries by Christian Peters
- Minor planets named from Celtic mythology
- Named minor planets
- S-type asteroids (Tholen)
- Sk-type asteroids (SMASS)
- Astronomical objects discovered in 1871
- S-type main-belt-asteroid stubs