Astronomy:36 Atalante
.png) Three-dimensional model of 36 Atalante created based on light-curve | |
| Discovery[1] | |
|---|---|
| Discovered by | H. Goldschmidt |
| Discovery date | October 5, 1855 |
| Designations | |
Designation | (36) Atalante |
| Pronunciation | /ætəˈlæntə/ for Atalanta, /ætəˈlæntiː/ for Atalante[3][lower-alpha 1] |
| Named after | Atalanta |
| A901 SB; A912 HC Atalanta[2] | |
| Minor planet category | Main belt |
| Adjectives | Atalantean /ˌætəlænˈtiːən/[4] |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| |{{{apsis}}}|helion}} | 535.625 million km (3.580 AU) |
| |{{{apsis}}}|helion}} | 286.217 million km (1.913 AU) |
| 410.921 million km (2.747 AU) | |
| Eccentricity | 0.303 |
| Orbital period | 1662.831 d (4.55 a) |
| Average Orbital speed | 17.55 km/s |
| Mean anomaly | 47.005° |
| Inclination | 18.432° |
| Longitude of ascending node | 358.472° |
| 47.132° | |
| Physical characteristics | |
| Mean diameter | 132.842 ± 29.191 km[1] 110.14 ± 4.38 km[5] |
| Mass | (9.57 ± 4.32/3.15)×1017 kg[6] |
| Mean density | 1.672 ± 0.755/0.551 g/cm3[6][lower-alpha 2] |
| ~0.0241 m/s² | |
| ~0.0498 km/s | |
| Rotation period | 0.414 d (9.93 h)[1] |
| Albedo | 0.029[1] |
| Physics | ~170 K |
Spectral type | C[1] |
| Absolute magnitude (H) | 8.59[1] |
36 Atalante is a large, dark main-belt asteroid. It was discovered by the German-French astronomer H. Goldschmidt on October 5, 1855, and named by French mathematician Urbain Le Verrier after the Greek mythological heroine Atalanta (of which Atalante is the French and German form, pronounced nearly the same as 'Atalanta' in English).[7] It was rendered 'Atalanta' in English sources in the 19th century.[2] This asteroid is classified as C-type (carbonaceous), according to the Tholen classification system.[1]
Observation of the asteroid light curve indicates it is rotating with a period of 9.93 ± 0.01 hours. During this interval, the magnitude varies by an amplitude of 0.12 ± 0.02.[8] By combining the results of multiple light curves, the approximate ellipsoidal shape of the object can be estimated. It appears to be slightly elongated, being about 28.2% longer along one axis compared to the other two.[9] Atalante was observed by Arecibo radar in October 2010.[10][11]
This asteroid shares a mean-motion resonance with the planets Jupiter and Saturn. The computed Lyapunov time for this asteroid is only 4,000 years, indicating that it occupies a highly chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. This is the shortest Lyapunov time of the first 100 named asteroids.[12]
Notes
- ↑ The /ætəˈlæntiː/ pronunciation is for the Greek form Ἀταλάντη; however, the name Atalante here is actually the German form of the Latin Atalanta, with the German final -e being a schwa much like an English final -a – and indeed, 'Atalanta' is given as the English form in Craig (1869).[2]
- ↑ Assuming a diameter of 103 ± 11.451 km.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: 36 Atalante". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=36.
- ↑ 2.0 2.1 2.2 John Craig (1869) The Universal English Dictionary
- ↑ 'Atalanta, Atalante' in The Century Dictionary and Cyclopedia.
- ↑ E.g. John Milton (1749) Paradise Lost
- ↑ Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 6.0 6.1 Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society 492 (1). doi:10.1093/mnras/stz3407. https://hal.science/hal-02458388/file/stz3407.pdf.
- ↑ Schmadel, Lutz D.; International Astronomical Union (2003), Dictionary of minor planet names, Physics and astronomy online library, 1 (5th ed.), Springer, p. 18, ISBN 3-540-00238-3, https://books.google.com/books?id=VoJ5nUyIzCsC&pg=PA18
- ↑ Brinsfield, James W. (September 2007), "The Rotation Periods of 36 Atalante and 416 Vaticana", The Minor Planet Bulletin 34 (3): 58–59, Bibcode: 2007MPBu...34...58B
- ↑ Blanco, C.; Riccioli, D. (September 1998), "Pole coordinates and shape of 30 asteroids", Astronomy and Astrophysics Supplement 131 (3): 385–394, doi:10.1051/aas:1998277, Bibcode: 1998A&AS..131..385B
- ↑ Mike Nolan (2012-01-18). "Scheduled Arecibo Radar Asteroid Observations". Planetary Radar at Arecibo Observatory. http://www.naic.edu/~pradar/sched.shtml.
- ↑ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. http://echo.jpl.nasa.gov/asteroids/.
- ↑ Šidlichovský, M. (1999), Svoren, J.; Pittich, E. M.; Rickman, H., eds., "Resonances and chaos in the asteroid belt", Evolution and source regions of asteroids and comets : proceedings of the 173rd colloquium of the International Astronomical Union, held in Tatranska Lomnica, Slovak Republic, August 24–28, 1998: pp. 297–308, Bibcode: 1999esra.conf..297S.
External links
- Lightcurve plot of 36 Atalante[Usurped!], Palmer Divide Observatory, B. D. Warner (2007)
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 36 Atalante at AstDyS-2, Asteroids—Dynamic Site
- 36 Atalante at the JPL Small-Body Database
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