Astronomy:954 Li
From HandWiki
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | 4 August 1921 |
| Designations | |
| (954) Li | |
| 1905 UN · 1920 GC · 1921 PC · 1943 PE · 1952 BE2[1] | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.65 yr (40051 days) |
| |{{{apsis}}}|helion}} | 3.6711 astronomical unit|AU (549.19 Gm) |
| |{{{apsis}}}|helion}} | 2.5915 AU (387.68 Gm) |
| 3.1313 AU (468.44 Gm) | |
| Eccentricity | 0.17239 |
| Orbital period | 5.54 yr (2023.9 d) |
| Mean anomaly | 34.454° |
| Mean motion | 0° 10m 40.332s / day |
| Inclination | 1.1694° |
| Longitude of ascending node | 163.235° |
| 151.503° | |
| Physical characteristics | |
| Mean radius | 26.03±0.41 km [3]: 5 [lower-alpha 1] |
| Rotation period | 7.207±0.002 h[4]: 604 |
| Geometric albedo | 0.06 (geometric)[2] |
| FCX[5]: 468 | |
| Absolute magnitude (H) | 10.16 (JPL)[2] |
954 Li is a main belt asteroid and member of the Themis family.[5] It was discovered by Karl Wilhelm Reinmuth on 4 August 1921 and was named after his wife Lina Alstede Reinmuth, who also had 955 Alstede named after her.[1] Classified as an FCX-type asteroid under the Tholen classification scheme, Li's spectrum may indicate aqueous alteration.[5]: 468 The asteroid is estimated to be around 52 kilometres (32 mi) in size,[3]: 5 and observations of its lightcurve—variations in its observed brightness—indicate that it rotates once every 7.2 hours.[4]: 604
Notes
References
- ↑ 1.0 1.1 1.2 "(954) Li = 1905 UN = 1920 GC = 1921 PC = 1943 PE = 1952 BE2". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=954. Retrieved 30 August 2025.
- ↑ 2.0 2.1 2.2 "954 Li (A921 PC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=954.
- ↑ 3.0 3.1 3.2 Fornasier, S.; Lantz, C.; Perna, D.; Campins, H.; Barucci, M. A.; Nevsorny, D. (May 2016). "Spectral variability on primitive asteroids of the Themis and Beagle families: Space weathering effects or parent body heterogeneity?". Icarus 269: 1–14. doi:10.1016/j.icarus.2016.01.002. Bibcode: 2016Icar..269....1F.
- ↑ 4.0 4.1 Shevchenko, Vasilij G.; Chiorny, Vasilij G.; Gaftonyuk, Ninel M.; Krugly, Yury N.; Belskaya, Irina N.; Tereschenko, Igor A.; Velichko, Fiodor P. (August 2008). "Asteroid observations at low phase angles: III. Brightness behavior of dark asteroids". Icarus 196 (2): 601–611. doi:10.1016/j.icarus.2008.03.015. Bibcode: 2008Icar..196..601S.
- ↑ 5.0 5.1 5.2 Florczak, M.; Lazzaro, D.; Mothé-Diniz, T.; Angeli, C. A.; Betzler, A. S. (February 1999). "A spectroscopic study of the Themis family". Astronomy and Astrophysics Supplement 134: 463–471. doi:10.1051/aas:1999150. Bibcode: 1999A&AS..134..463F.
External links
- 954 Li at AstDyS-2, Asteroids—Dynamic Site
- 954 Li at the JPL Small-Body Database
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