Astronomy:116 Sirona
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Short description: Main-belt asteroid
_Sirona.png) 3D convex shape model of 116 Sirona | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | 8 September 1871 |
| Designations | |
| (116) Sirona | |
| Pronunciation | /ˈsɪroʊnə/ |
| Named after | Đīrona |
| A871 RA; 1954 UC3; 1998 EK13; 1998 ES21 | |
| 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) |
| |{{{apsis}}}|helion}} | 3.1616 astronomical unit|AU (472.97 Gm) |
| |{{{apsis}}}|helion}} | 2.37322 AU (355.029 Gm) |
| 2.76741 AU (413.999 Gm) | |
| Eccentricity | 0.14244 |
| Orbital period | 4.60 yr (1681.5 d) |
| Average Orbital speed | 17.81 km/s |
| Mean anomaly | 7.59231° |
| Mean motion | 0° 12m 50.724s / day |
| Inclination | 3.5635° |
| Longitude of ascending node | 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 |
| Rotation period | 12.028 h (0.5012 d)[1][2] |
| Geometric albedo | 0.2560±0.047 |
| Physics | ~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
- ↑ 1.0 1.1 1.2 Yeomans, Donald K., "116 Sirona", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=116, retrieved 12 May 2016.
- ↑ 2.0 2.1 2.2 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 62: pp. 512–517, doi:10.1016/0019-1035(85)90191-5, Bibcode: 1985Icar...62..512Z.
- ↑ Schmadel, Lutz D. (2003), Dictionary of Minor Planet Names (5th ed.), Springer, p. 26, ISBN 3540002383, https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA982.
External links
- 116 Sirona at AstDyS-2, Asteroids—Dynamic Site
- 116 Sirona at the JPL Small-Body Database
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