1870 Glaukos

From Wikipedia, the free encyclopedia
Jump to: navigation, search
1870 Glaukos
Discovery [1][2]
Discovered by T. Gehrels
C. J. van Houten
I. van Houten-Groeneveld
Discovery site Palomar Obs.
Discovery date 24 March 1971
MPC designation 1870 Glaukos
Named after
(Greek mythology)[3]
1971 FE · 1976 SM
Jupiter trojan[1][4]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 60.27 yr (22013 days)
Aphelion 5.4154 AU (810.13 Gm)
Perihelion 5.0810 AU (760.11 Gm)
5.2482 AU (785.12 Gm)
Eccentricity 0.031855
12.02 yr (4391.48 d)
0° 4m 55.117s / day
Inclination 6.5760°
Earth MOID 4.06907 AU (608.724 Gm)
Jupiter MOID 0.121649 AU (18.1984 Gm)
Jupiter Tisserand parameter 2.986
Physical characteristics
Dimensions 40.33 km (calculated)[4]
5.986 h (0.2494 d)[1][5]
5.9797±0.0205 h[6]
0.057 (assumed)[4]

1870 Glaukos, provisional designation 1971 FE, is a carbonaceous Jupiter trojan, approximately 40 kilometers in diameter. It was by discovered by Cornelis van Houten and I. van Houten-Groeneveld at Leiden, on photographic plates taken by Tom Gehrels at the Californian Palomar Observatory, United States on 24 March 1971.[2]

The Trojan asteroid with a C-type spectra orbits the Sun at a distance of 5.1–5.4 AU once every 12 years (4,392 days). It has an assumed albedo of 0.057 and takes 5.9 hours to rotate around its axis.[5][6] More than 6,200 Jupiter trojans have already been discovered.[7]

The discovery was made in a survey of faint Trojans. The trio of Dutch and Dutch–American astronomers also collaborated on the productive Palomar–Leiden survey in the 1960s, using the same procedure as for this (smaller) survey: Tom Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten at Leiden Observatory where astrometry was carried out.

The Trojan asteroid was named after Glaukos (Glaucus) from Greek mythology. In Homer's Iliad, he was captain in the Lycian army during the Trojan War and was killed by Ajax, after whom the minor planet 1404 Ajax is named.[3]


  1. ^ a b c d "JPL Small-Body Database Browser: 1870 Glaukos (1971 FE)" (2015-10-02 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2016. 
  2. ^ a b "1870 Glaukos (1971 FE)". Minor Planet Center. Retrieved 8 November 2015. 
  3. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1870) Glaukos. Springer Berlin Heidelberg. p. 150. ISBN 978-3-540-29925-7. Retrieved 8 November 2015. 
  4. ^ a b c d "LCDB Data for (1870) Glaukos". Asteroid Lightcurve Database (LCDB). Retrieved 8 November 2015. 
  5. ^ a b Stephens, Robert D.; French, Linda M.; Davitt, Chelsea; Coley, Daniel R. (April 2014). "At the Scaean Gates: Observations Jovian Trojan Asteroids, July- December 2013". The Minor Planet Bulletin. 41 (2): 95–100. Bibcode:2014MPBu...41...95S. ISSN 1052-8091. Retrieved 8 November 2015. 
  6. ^ a b Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041free to read. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 8 November 2015. 
  7. ^ "Trojan Minor Planets". Minor Planet Center. Retrieved 8 November 2014. 

External links[edit]