2197 Shanghai

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2197 Shanghai
Discovery [1]
Discovered by Purple Mountain Obs.
Discovery site Purple Mountain Obs.
Discovery date 30 December 1965
Designations
MPC designation 2197 Shanghai
Named after
Shanghai (Chinese city)[2]
1965 YN · 1942 VN
1955 DA · 1964 UN
1967 JT · 1975 SD
main-belt · Themis[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 61.15 yr (22,336 days)
Aphelion 3.5458 AU
Perihelion 2.7596 AU
3.1527 AU
Eccentricity 0.1247
5.60 yr (2,045 days)
25.917°
0° 10m 33.96s / day
Inclination 2.4979°
56.371°
70.838°
Physical characteristics
Dimensions 20.198±0.136 km[1][4]
20.20±0.14 km[3][4]
22.23 km (derived)[3]
23.88±0.70 km[5]
5.9384±0.0023 h[6]
5.99±0.05 h[7]
0.0898 (derived)[3]
0.106±0.007[5]
0.119±0.014[4]
C[3]
11.20[5] · 11.40[4] · 11.304±0.001 (R)[6] · 11.5[1][3] · 11.54±0.19[8]

2197 Shanghai, provisional designation 1965 YN, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 30 December 1965, by astronomers at the Purple Mountain Observatory in Nanking, China.[9]

The dark C-type asteroid is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun at a distance of 2.8–3.5 AU once every 5 years and 7 months (2,045 days). Its orbit has an eccentricity of 0.12 and an inclination of 2° with respect to the ecliptic.[1]

In December 2010, a rotational light-curve was obtained for this asteroid from photometric observations taken at the U.S. Palomar Transient Factory in California. It gave a rotation period of 5.9384±0.0023 hours with a brightness variation of 0.16 magnitude (U=2).[6] A similar period of 5.99±0.05 hours with an amplitude of 0.16 magnitude was derived by French amateur astronomer Pierre Antonini, observing the body one month later in January 2011 (U=2).[7]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 20.2 and 23.9 kilometers in diameter and its surface has an albedo of 0.119 and 0.106, respectively.[5][4] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0898 and a diameter of 22.2 kilometers, based on an absolute magnitude of 11.5.[3]

The minor planet is named after Shanghai, the most populous city of China (pop. 24 million as of 2014). Located in the Yangtze River Delta in eastern China, it has the world's busiest container port.[2] Naming citation was published on 1 June 1981 (M.P.C. 6059).[10]

References[edit]

  1. ^ a b c d e "JPL Small-Body Database Browser: 2197 Shanghai (1965 YN)" (2016-04-19 last obs.). Jet Propulsion Laboratory. Retrieved 7 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2197) Shanghai. Springer Berlin Heidelberg. p. 179. ISBN 978-3-540-00238-3. Retrieved 1 September 2016. 
  3. ^ a b c d e f g "LCDB Data for (2197) Shanghai". Asteroid Lightcurve Database (LCDB). Retrieved 1 September 2016. 
  4. ^ a b c d e Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (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. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 1 September 2016. 
  5. ^ 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" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 1 September 2016. 
  6. ^ a b c 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 1 September 2016. 
  7. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2197) Shanghai". Geneva Observatory. Retrieved 1 September 2016. 
  8. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 1 September 2016. 
  9. ^ "2197 Shanghai (1965 YN)". Minor Planet Center. Retrieved 1 September 2016. 
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 September 2016. 

External links[edit]