284 Amalia is a large main belt asteroid.[2] It was discovered by Auguste Charlois on 29 May 1889 in Nice. This is classified as a Ch-type asteroid in the Bus taxonomy[3] and CX in the Tholen system.[4] It has been observed occulting stars on five occasions as of 2018, which provide a diameter estimate of 54±3 km via a fitted ellipse plot.[5]
 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 29 May 1889 |
| Designations | |
| (284) Amalia | |
| Pronunciation | /əˈmɑːliə/ |
| A889 KA | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.66 yr (44,800 d) |
| Aphelion | 2.88122 AU (431.024 Gm) |
| Perihelion | 1.83631 AU (274.708 Gm) |
| 2.35876 AU (352.865 Gm) | |
| Eccentricity | 0.22149 |
| 3.62 yr (1,323.2 d) | |
Average orbital speed | 19.39 km/s |
| 0.0848612° | |
| 0° 16m 19.445s / day | |
| Inclination | 8.05647° |
| 233.716° | |
| 2023-Oct-29 | |
| 58.0568° | |
| Physical characteristics | |
| Dimensions | 52.95±2.6 km |
| 8.545 h (0.3560 d) | |
| 0.0602±0.006 | |
| 10.05 | |
References
edit- ^ "284 Amalia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- ^ "284 Amalia". Asteroid Occultation. Archived from the original on 4 March 2016. Retrieved 6 April 2015.
- ^ Gil-Hutton, R.; Cañada-Assandri, M. (March 2012), "Polarimetric survey of main-belt asteroids. II. Results for 58 B- and C-type objects", Astronomy & Astrophysics, 539: 4, Bibcode:2012A&A...539A.115G, doi:10.1051/0004-6361/201117237, A115.
- ^ Clark, B. E.; et al. (December 2004), "Spectroscopy of X-Type Asteroids", The Astronomical Journal, 128 (6): 3070–3081, Bibcode:2004AJ....128.3070C, doi:10.1086/424856, S2CID 450504.
- ^ Broughton, John (30 April 2018), "Asteroid Dimensions from Occultations", Worldwide Asteroidal Occultation Observations and Resources, retrieved 10 September 2021.
External links
edit- 284 Amalia at AstDyS-2, Asteroids—Dynamic Site
- 284 Amalia at the JPL Small-Body Database
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