Astronomy:691 Lehigh
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| Discovery | |
|---|---|
| Discovered by | Joel Hastings Metcalf |
| Discovery site | Taunton, Massachusetts |
| Discovery date | 11 December 1909 |
| Designations | |
| (691) Lehigh | |
| Pronunciation | /ˈliːhaɪ/[1] |
| 1909 JG | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 101.40 yr (37038 d) |
| |{{{apsis}}}|helion}} | 3.3787 astronomical unit|AU (505.45 Gm) |
| |{{{apsis}}}|helion}} | 2.6443 AU (395.58 Gm) |
| 3.0115 AU (450.51 Gm) | |
| Eccentricity | 0.12194 |
| Orbital period | 5.23 yr (1908.9 d) |
| Mean anomaly | 189.349° |
| Mean motion | 0° 11m 18.924s / day |
| Inclination | 13.010° |
| Longitude of ascending node | 87.997° |
| 304.466° | |
| Physical characteristics | |
| Mean radius | 43.84±0.85 km |
| Rotation period | 12.891 h (0.5371 d) |
| Geometric albedo | 0.0438±0.002 |
| Absolute magnitude (H) | 9.2 |
691 Lehigh is a minor planet (the earlier term for an asteroid) orbiting the Sun, discovered in 1909.[3] It is named "Lehigh" after Lehigh University, where its orbit was calculated in the Masters Thesis of Joseph B. Reynolds, following the observations of amateur astronomer Joel Metcalf.
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ "691 Lehigh (1909 JG)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=691;cad=1.
- ↑ "(691) Lehigh". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. 2007. pp. 67. doi:10.1007/978-3-540-29925-7_692. ISBN 9783540299257.
External links
- Planet Lehigh: Early Astronomy, Lehigh University – Special Collections
- Lightcurve plot of 691 Lehigh, Palmer Divide Observatory, B. D. Warner (2009)
- 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
- 691 Lehigh at AstDyS-2, Asteroids—Dynamic Site
- 691 Lehigh at the JPL Small-Body Database
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