Astronomy:284 Amalia
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Short description: Main-belt asteroid
 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 29 May 1889 |
| Designations | |
| (284) Amalia | |
| Pronunciation | /əˈmɑːliə/ |
| A889 KA | |
| Minor planet category | Main belt |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.66 yr (44,800 d) |
| |{{{apsis}}}|helion}} | 2.88122 astronomical unit|AU (431.024 Gm) |
| |{{{apsis}}}|helion}} | 1.83631 AU (274.708 Gm) |
| 2.35876 AU (352.865 Gm) | |
| Eccentricity | 0.22149 |
| Orbital period | 3.62 yr (1,323.2 d) |
| Average Orbital speed | 19.39 km/s |
| Mean anomaly | 0.0848612° |
| Mean motion | 0° 16m 19.445s / day |
| Inclination | 8.05647° |
| Longitude of ascending node | 233.716° |
| |{{{apsis}}}|helion}} | 2023-Oct-29 |
| 58.0568° | |
| Physical characteristics | |
| Dimensions | 52.95±2.6 km |
| Rotation period | 8.545 h (0.3560 d) |
| Geometric albedo | 0.0602±0.006 |
| Absolute magnitude (H) | 10.05 |
Amalia (minor planet designation: 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]
References
- ↑ "284 Amalia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=284.
- ↑ "284 Amalia". Asteroid Occultation. http://www.asteroidoccultation.com/2014_09/0925_284_33588.htm. 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, doi:10.1051/0004-6361/201117237, A115, Bibcode: 2012A&A...539A.115G.
- ↑ Clark, B. E. et al. (December 2004), "Spectroscopy of X-Type Asteroids", The Astronomical Journal 128 (6): 3070–3081, doi:10.1086/424856, Bibcode: 2004AJ....128.3070C.
- ↑ "Asteroid Dimensions from Occultations", Worldwide Asteroidal Occultation Observations and Resources, https://www.asteroidoccultation.com/observations/Asteroid_Dimensions_from_Occultations.html, retrieved 2021-09-10.
External links
- 284 Amalia at AstDyS-2, Asteroids—Dynamic Site
- 284 Amalia at the JPL Small-Body Database
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