296 Phaëtusa
_Pha%C3%ABtusa.png) Modelled shape of Phaëtusa from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 19 August 1890 |
| Designations | |
| Pronunciation | /feɪ.əˈtjuːsə/[1] |
Named after | Phaethusa |
| A890 QB A917 XB 1930 YH[2] | |
| Main belt[3] | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 105.57 yr (38560 d)[2] |
| Aphelion | 2.58602 AU (386.863 Gm) |
| Perihelion | 1.87155 AU (279.980 Gm) |
| 2.22879 AU (333.422 Gm) | |
| Eccentricity | 0.16028 |
| 3.327442 yr (1215.348 d) | |
Average orbital speed | 19.95 km/s |
| 272.510° | |
| 0° 17m 46.586s / day | |
| Inclination | 1.74838° |
| 121.548° | |
| 252.449° | |
| Physical characteristics | |
| 8.196±0.100 km[2] | |
| 4.5385 h (0.18910 d)[2] | |
| 0.379±0.046 (geometric)[2] | |
| 12.53[2] | |
296 Phaëtusa is a small Main belt asteroid.[3][2] It was discovered by Auguste Charlois on 19 August 1890 in Nice.[3]
Discovery
Phaëtusa was discovered on 19 August 1890 by Charlois A. at Nice.[3][2]
Observations
The observation arc of Phaëtusa began on 7 September 1920 and was last observed on 4 April 2026.[2] Giving it a long observation arc of 106 years.[2] In these 106 years, Phaëtusa has been observed 7820 times.[2]
Orbit
Phaëtusa is a main belt asteroid[2][3] that orbits the Sun at a distance of 1.872–2.586 astronomical units (AU) with a semi-major axis or average orbital distance of 2.229 AU once every 3.33 years[2] (for reference, Ceres's orbit is at 2.77 AU).[4]
Phaëtusa's orbit has an eccentricity of 0.1603 and an inclination of 1.748° with respect to the ecliptic.[2]
Physical characteristics
Phaëtusa has a diameter of approximately 8.196±0.100 km,[2] its geometric albedo is 0.379±0.046.[2] Phaëtusa rotates on its axis once every 4.5385 hours.[2] The B-V color index of Phaëtusa is 0.887±0.013.[2]
References
- ↑ 'Phaethusa' in Noah Webster (1884) A Practical Dictionary of the English Language
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 "296 Phaetusa". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- 1 2 3 4 5 "(296) Phaëtusa = 1890 QB = 1917 XB = 1930 YH". Minor Planet Center. Retrieved 12 July 2026.
- ↑ "AstDyS-2 Ceres Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Archived from the original on 21 November 2011. Retrieved 1 October 2011.
External links
- 296 Phaëtusa at AstDyS-2, Asteroids—Dynamic Site
- 296 Phaëtusa at the JPL Small-Body Database