691 Lehigh
| Discovery | |
|---|---|
| Discovered by | Joel Hastings Metcalf |
| Discovery site | Taunton, Massachusetts |
| Discovery date | 11 December 1909 |
| Designations | |
| 1909 JG | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 101.40 yr (37038 d) |
| Aphelion | 3.3787 AU (505.45 Gm) |
| Perihelion | 2.6443 AU (395.58 Gm) |
| 3.0115 AU (450.51 Gm) | |
| Eccentricity | 0.12194 |
| 5.23 yr (1908.9 d) | |
| 189.349° | |
| 0° 11m 18.924s / day | |
| Inclination | 13.010° |
| 87.997° | |
| 304.466° | |
| Earth MOID | 1.67575 AU (250.689 Gm) |
| Jupiter MOID | 2.06397 AU (308.766 Gm) |
| Jupiter Tisserand parameter | 3.199 |
| Physical characteristics | |
Mean radius | 43.84±0.85 km |
| 12.891 h (0.5371 d) | |
| 0.0438±0.002 | |
| 9.2 | |
|
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691 Lehigh is a minor planet (the earlier term for an asteroid) orbiting the Sun, discovered in 1909.[2] It is named "Lehigh" after Lehigh University, where its orbit was calculated n the Masters Thesis of Joseph B. Reynolds, following the observations of amateur astronomer Joel Metcalf.
References
- ↑ "691 Lehigh (1909 JG)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
- ↑ Dictionary of Minor Planet Names. Springer Berlin Heidelberg. 2007. p. 67. ISBN 9783540299257.
External links
- Discovery Circumstances: Numbered Minor Planets
- Lehigh University – Special Collections – Planet Lehigh: Early Astronomy
- 691 Lehigh at the JPL Small-Body Database
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