astro.wikisort.org - Asteroid
Frigga (minor planet designation: 77 Frigga) is a large, M-type, possibly metallic main-belt asteroid. It was discovered by the German-American astronomer C. H. F. Peters on November 12, 1862. The object is named after Frigg, the Norse goddess. The asteroid is orbiting the Sun with a period of 4.36 years and completes a rotation on its axis every nine hours.
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | November 12, 1862 |
| Designations | |
MPC designation | (77) Frigga |
| Pronunciation | /ˈfrɪɡə/[1] |
Named after | Frigg |
Minor planet category | Main belt |
| Adjectives | [citation needed] |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 452.196 Gm (3.023 AU) |
| Perihelion | 346.228 Gm (2.314 AU) |
Semi-major axis | 399.212 Gm (2.669 AU) |
| Eccentricity | 0.133 |
Orbital period (sidereal) | 1592.266 d (4.36 a) |
Average orbital speed | 18.15 km/s |
Mean anomaly | 346.682° |
| Inclination | 2.433° |
Longitude of ascending node | 1.332° |
Argument of perihelion | 61.419° |
| Physical characteristics | |
| Dimensions | 69.2 km[2] |
| Mass | (1.74 ± 0.68) × 1018 kg[3] |
Mean density | 11.05 ± 4.34[3] g/cm3 |
Equatorial surface gravity | 0.0193 m/s² |
Equatorial escape velocity | 0.0366 km/s |
Synodic rotation period | 9.0 hr[2] |
Geometric albedo | 0.144[2][4] |
Spectral type | M |
Absolute magnitude (H) | 8.52[2] |
Frigga has been studied by radar.[5] The spectra of this asteroid displays a feature at a wavelength of 3 μm, indicating the presence of hydrated minerals on the surface.[6] The near infrared spectrum is reddish and shows no spectral absorption features. Potential analogs of this spectrum include enstatite chondrites and nickel-iron meteorites.[7]
Since 1999 there have been four stellar occultations by the asteroid. The first three were single chord observations, and the fourth was a 3-chord observation, and a miss. The best fit ellipse measures 60.0x74.0 kilometres at PA -14degrees.[8]
References
- Upton, Clive; Kretzschmar, William A., Jr. (2017). The Routledge Dictionary of Pronunciation for Current English (2nd ed.). Routledge. p. 519. ISBN 978-1-138-12566-7.
- "JPL Small-Body Database Browser: 77 Frigga" (2012-01-04 last obs). Jet Propulsion Laboratory. Retrieved 27 January 2012.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
- "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 27 January 2012.
- Gil-Hutton, R. (March 2007), "Polarimetry of M-type asteroids", Astronomy and Astrophysics, 464 (3): 1127−1132, Bibcode:2007A&A...464.1127G, doi:10.1051/0004-6361:20066348.
- Takir, D.; et al. (March 2008), "The Near-Infrared Spectroscopy of Two M-Class Main Belt Asteroids, 77 Frigga and 325 Heidelberga", 39th Lunar and Planetary Science Conference, (Lunar and Planetary Science XXXIX), held March 10-14, 2008 in League City, Texas. LPI Contribution No. 1391., p. 1084, Bibcode:2008LPI....39.1084T
- "PDS Asteroid/Dust Subnode". sbn.psi.edu. Archived from the original on 25 April 2018. Retrieved 19 May 2018.
External links
- Lightcurve plot of 77 Frigga, Palmer Divide Observatory, B. D. Warner (2012)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- 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
- 77 Frigga at AstDyS-2, Asteroids—Dynamic Site
- 77 Frigga at the JPL Small-Body Database
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На других языках
[de] (77) Frigga
(77) Frigga ist ein Asteroid des Hauptgürtels, der am 12. November 1862 von dem deutschen Astronomen Christian Heinrich Friedrich Peters entdeckt wurde.[1] Er markiert die dritte Entdeckung von Peters im Asteroidengürtel.- [en] 77 Frigga
[es] (77) Frigga
(77) Frigga es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Christian Heinrich Friedrich Peters el 12 de noviembre de 1862 desde el observatorio Litchfield de Clinton, Estados Unidos. Está nombrado por Frigg, una diosa de la mitología nórdica.[2][ru] (77) Фригга
(77) Фригга (лат. Frigga) — астероид главного пояса, принадлежащий к металлическому спектральному классу M. Он был открыт 12 ноября 1862 года американским астрономом Кристианом Петерсом в обсерватории Литчфилд, США и назван в честь Фригг, жены Одина и верховной богини в германо-скандинавской мифологии[1].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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