1687 Glarona

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1687 Glarona
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 19 September 1965
MPC designation 1687 Glarona
Named after
(Swiss canton)[2]
1965 SC · 1926 UA
1931 RB1 · 1942 PD
1945 EA · 1948 QN
1948 RD1 · 1954 TB
1954 UB2 · 1959 PG
1960 XD · 1965 UX
A909 UA · A915 XC
main-belt · Themis[3]
Orbital characteristics[1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 105.95 yr (38,700 days)
Aphelion 3.7182 AU
Perihelion 2.6001 AU
3.1592 AU
Eccentricity 0.1769
5.62 yr (2,051 days)
Inclination 2.6365°
Physical characteristics
Dimensions 33.93 km[4]
36.75±0.93 km[5]
42.007±0.515 km[6]
31.52±0.50 km[7]
6.3 h[a]
B–V = 0.670
U–B = 0.380

1687 Glarona, provisional designation 1965 SC, is a stony asteroid from the outer region of the asteroid belt, approximately 34 kilometers in diameter. It was discovered by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland on 19 September 1965.[8]

The asteroid is a member of the Themis family, one of the larger groups in the outer main-belt. It orbits the Sun at a distance of 2.6–3.7 AU once every 5 years and 7 months (2,051 days). Its well-defined orbit shows an eccentricity of 0.18 and is tilted by 3 degrees to the plane of the ecliptic. It has a rotation period of 6.3 hours with a variation in brightness, or magnitude amplitude, of 0.75.[a] The assumed S-type asteroid has an albedo of 0.06–0.16, according to observations made by the IRAS, Akari, WISE and NEOWISE surveys.[4][5][6][7] Moreover, based on its orbital elements, Glarona is also a Themistian asteroid, which are known to have low albedos, showing spectra of carbonaceous C-type bodies (also see Carbonaceous chondrites).[9]

The minor planet was named in honor of the discoverer's home valley, the canton and town of Glarus in Switzerland.[2] Paul Wild (1925–2014) was a prolific discoverer almost 100 asteroids, and is well-known for his discovery of comet Wild 2, which was visited by NASA's Stardust mission.


  1. ^ a b Tedesco (1979): rotation period of 6.3 hours with an amplitude in brightness of 0.75 in magnitude. Summary figure given at Light curve Database for (1687) Glarona and JPL's Small-Body Database Browser for 1687 Glarona (1965 SC)
  1. ^ a b "JPL Small-Body Database Browser: 1687 Glarona (1965 SC)" (2015-10-01 last obs.). Jet Propulsion Laboratory. Retrieved November 2015. 
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1687) Glarona. Springer Berlin Heidelberg. p. 134. ISBN 978-3-540-29925-7. Retrieved November 2015. 
  3. ^ a b "LCDB Data for (1687) Glarona". Asteroid Lightcurve Database (LCDB). Retrieved November 2015. 
  4. ^ a b c Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved November 2015. 
  5. ^ a b c Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; Ishihara, Daisuke; Kataza, Hirokazu; Takita, Satoshi; Oyabu, Shinki; Ueno, Munetaka; Matsuhara, Hideo; Onaka, Takashi (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015. 
  6. ^ a b c Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; McMillan, R. S.; Spahr, T.; Cutri, R. M.; Wright, E.; Watkins, J.; Mo, W.; Maleszewski, C. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015. 
  7. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; Cabrera, M. S. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved November 2015. 
  8. ^ "1687 Glarona (1965 SC)". Minor Planet Center. Retrieved November 2015. 
  9. ^ Rivkin, A. S.; Howell, E. S.; Bus, S. J. (March 2004). "Diversity of Types of Hydrated Minerals on C-Class Asteroids". 35th Lunar and Planetary Science Conference. Bibcode:2004LPI....35.1646R. Retrieved November 2015. 

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