From Surf Wiki (app.surf) — the open knowledge base
64 Angelina
Main-belt asteroid
Main-belt asteroid
| Field | Value |
|---|---|
| minorplanet | yes |
| background | #D6D6D6 |
| name | 64 Angelina |
| image | 64Angelina (Lightcurve Inversion).png |
| caption | Lightcurve-based 3D-model of *Angelina* |
| discoverer | Ernst Wilhelm Tempel |
| discovered | March 4, 1861 |
| mpc_name | (64) Angelina |
| pronounced | |
| adjective | Angelinian ( ) |
| mp_category | Main belt |
| epoch | December 31, 2006 (JD 2454100.5) |
| semimajor | 401.580 million km (2.684 AU) |
| perihelion | 351.784 million km (2.352 AU) |
| aphelion | 451.375 million km (3.017 AU) |
| eccentricity | 0.124 |
| period | 1606.452 d (4.40 yr) |
| inclination | 1.308° |
| asc_node | 309.285° |
| arg_peri | 179.641° |
| mean_anomaly | 107.758° |
| dimensions | 48 × 53 km |
| 52 ± 10 km | |
| 60 × 53 × 45 km | |
| mass | 1.5 kg (assumed) |
| rotation | 8.752 hr (0.365 d) |
| spectral_type | E |
| abs_magnitude | 7.67 |
| albedo | 0.28 |
| 0.483 (NEOWISE) |
52 ± 10 km 60 × 53 × 45 km 0.483 (NEOWISE)
64 Angelina is an asteroid from the central region of the asteroid belt, approximately 50 kilometers in diameter. It is an unusually bright form of E-type asteroid.
Discovery and naming
Angelina was discovered on March 4, 1861, by a prolific comet discoverer, E. W. Tempel, observing from Marseille, France. It was the first of his five asteroid discoveries.
The naming of Angelina caused some controversy. It was chosen by Benjamin Valz, director of the Marseille Observatory, in honour of the astronomical station of that name operated by Baron Franz Xaver von Zach on the mountains above the city. At the time, asteroids were supposed to receive names from classical mythology, and several astronomers protested against the choice. Tempel noted that if the second 'n' were removed, the complaints would be satisfied (referring to Angelia, a minor Greek deity). However, Valz's choice stayed.
Physical characteristics
Angelina is a rare E-type asteroid; it is the second largest E-type after 44 Nysa, and has an exceptionally high albedo of 0.483. Back when asteroids were generally assumed to have low albedos, Angelina was thought to be the largest of this class, but modern research has shown that its diameter is only a quarter of what was previously assumed, an error caused by its exceptional brightness. Traditional calculations had suggested that since Angelina has an absolute magnitude of 7.7 and an albedo of 0.15, its diameter would have been around 100 km. However, a 2004 occultation showed a cross-sectional profile of only 48x53 km. Angelina was observed by Arecibo radar in January 2010.
References
References
- {{OED. Angelina
- Schmadel, Lutz D.. (2003). "Dictionary of Minor Planet Names". Springer Science & Business Media.
- (1996). "On the Polarization Opposition Effect of E-Type Asteroid 64 Angelina". Icarus.
- As of 1991, it is thought to have an average radius of about {{convert. 30. km. mi
- Using a spherical radius of 26 km; [[Volume#Formulas. 1.472
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
Ask Mako anything about 64 Angelina — get instant answers, deeper analysis, and related topics.
Research with MakoFree with your Surf account
Create a free account to save articles, ask Mako questions, and organize your research.
Sign up freeThis content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.
Report