691 Lehigh

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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

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[edit]

  1. ^ "691 Lehigh (1909 JG)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016. 
  2. ^ Dictionary of Minor Planet Names. Springer Berlin Heidelberg. 2007. p. 67. ISBN 9783540299257. 

External links[edit]