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1764 Cogshall - Wikipedia

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1764 Cogshall
Discovery^[1]
Discovered by	Indiana University (Indiana Asteroid Program)
Discovery site	Goethe Link Obs.
Discovery date	7 November 1953
Designations
MPC designation	(1764) Cogshall
Named after	Wilbur A. Cogshall^[2] (professor of astronomy at IU)
Alternative designations	1953 VM₁ · 1935 MF 1939 CC · 1942 VB 1951 LC · 1952 SM 1953 XJ · 1964 XG 1967 GO · 1969 TN₂
Minor planet category	main-belt · (outer) Themis^[3]^[4]^[5]
Orbital characteristics^[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	82.02 yr (29,956 days)
Aphelion	3.4671 AU
Perihelion	2.7193 AU
Semi-major axis	3.0932 AU
Eccentricity	0.1209
Orbital period (sidereal)	5.44 yr (1,987 days)
Mean anomaly	84.951°
Mean motion	0° 10^m 52.32^s / day
Inclination	2.2355°
Longitude of ascending node	152.23°
Argument of perihelion	79.719°
Physical characteristics
Dimensions	25.14±0.64 km^[6] 26.13 km (derived)^[3] 26.21±2.0 km^[7] 26.970±0.232 km^[8] 29.671±0.179 km^[9]
Synodic rotation period	3.624±0.0052 h (R)^[10] 3.62417±0.00007 h^[11] 3.630±0.0052 h (S)^[10]
Geometric albedo	0.0606±0.0086^[9] 0.0712 (derived)^[3] 0.0852±0.015^[7] 0.094±0.005^[6] 0.109±0.010^[8]
Spectral type	S/C (generically assumed)^[3]
Absolute magnitude (H)	11.20^[6]^[7] · 11.248±0.002 (R)^[10] · 11.3^[9] · 11.4^[1]^[3]

1764 Cogshall, provisional designation 1953 VM₁, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 7 November 1953 by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States.^[12] The asteroid was named after Wilbur Cogshall, professor of astronomy at Indiana University.^[2]

Orbit and classification

Cogshall is a Themistian asteroid that belongs to the Themis family (602),^[4]^[5] a very large family of carbonaceous asteroids named after 24 Themis.^[13]^: 23 It orbits the Sun in the outer main belt at a distance of 2.7–3.5 AU once every 5 years and 5 months (1,987 days). Its orbit has an eccentricity of 0.12 and an inclination of 2° concerning to the ecliptic.^[1]

The asteroid was first identified as 1935 MF at Johannesburg Observatory in June 1935. The body's observation arc begins with its identification as 1939 CC at Turku Observatory in February 1939, more than 14 years before its official discovery observation at Goethe Link.^[12]

Physical characteristics

Rotation period

In May 2005, French amateur astronomer Pierre Antonini obtained a rotational lightcurve of Cogshall from photometric observations. Lightcurve analysis gave a well-defined rotation period of 3.62417 hours with a brightness variation of 0.21 magnitude (U=3).^[11]

Observations at the Palomar Transient Factory in 2012 gave a concurring period of 3.624 and 3.630 hours with an amplitude of 0.22 and 0.20 magnitude in the R- and S-band, respectively (U=2/2).^[10]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Cogshall measures between 25.14 and 29.671 kilometers in diameter, and its surface has an albedo between 0.0606 and 0.109.^[6]^[7]^[8]^[9]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0712 and a diameter of 26.13 kilometers based on an absolute magnitude of 11.4.^[3]

Naming

This minor planet was named after American astronomer Wilbur A. Cogshall, a professor of astronomy at Indiana University and director of the Kirkwood Observatory for more than four decades (1900–1944). His research included visual binary stars and the photography of solar eclipses. The name was proposed by Frank K. Edmondson, who initiated the Indiana Asteroid Program.^[2]^[14] The Minor Planet Center published the official naming citation on 20 February 1971 (M.P.C. 3143).^[15]

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 1764 Cogshall (1953 VM1)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 6 September 2017.
^ ^a ^b ^c Schmadel, Lutz D. (2007). "(1764) Cogshall". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 141. doi:10.1007/978-3-540-29925-7_1765. ISBN 978-3-540-00238-3.
^ ^a ^b ^c ^d ^e ^f "LCDB Data for (1764) Cogshall". Asteroid Lightcurve Database (LCDB). Retrieved 6 September 2017.
^ ^a ^b "Asteroid 1764 Cogshall – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 31 October 2019.
^ ^a ^b "Asteroid 1764 Cogshall – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 31 October 2019.
^ ^a ^b ^c ^d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (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. (online, AcuA catalog p. 153)
^ ^a ^b ^c ^d 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.
^ ^a ^b ^c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121.
^ ^a ^b ^c ^d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
^ ^a ^b ^c ^d 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75.
^ ^a ^b Behrend, Raoul. "Asteroids and comets rotation curves – (1764) Cogshall". Geneva Observatory. Retrieved 6 September 2017.
^ ^a ^b "1764 Cogshall (1953 VM1)". Minor Planet Center. Retrieved 6 September 2017.
^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
^ Lauren J. Bryant. "Farseeing and Abiding at IU". Indiana University. Retrieved 6 September 2017.
^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links

Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
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
1764 Cogshall at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
1764 Cogshall at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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