2197 Shanghai

2197 ShanghaiDiscovery [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]

Alternative designations

| 1965 YN * 1942 VN
1955 DA * 1964 UN
1967 JT * 1975 SD
Minor planet category| main-belt * Themis [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc| 62.10 yr (22,682 days)
|{{{apsis}}}|helion}}| 3.5508 AU
|{{{apsis}}}|helion}}| 2.7595 AU

Semi-major axis

| 3.1551 AU
Eccentricity| 0.1254
Orbital period| 5.60 yr (2,047 days)
Mean anomaly| 60.923°
Mean motion| 0° 10m 33.24s / day
Inclination| 2.4980°
Longitude of ascending node| 56.369°

|{{{apsis}}}|helion}}

| 70.991°
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]
Rotation period| 5.9384±0.0023 h[6]
5.99±0.05 h[7]
Geometric albedo| 0.0898 (derived)[3]
0.106±0.007[5]
0.119±0.014[4]

Spectral type

| C [3]
Absolute magnitude (H)| 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.

The asteroid was discovered on 30 December 1965, by astronomers at the Purple Mountain Observatory in Nanking, China, and named after the city of Shanghai.[2][9]

## Contents

* 1 Orbit and classification
* 2 Physical characteristics
* 2.1 Rotation period
* 2.2 Diameter and albedo
* 3 Naming
* 4 References
* 5 External links

## Orbit and classification

Shanghai 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 2.8–3.6 AU once every 5 years and 7 months (2,047 days). Its orbit has an eccentricity of 0.13 and an inclination of 2° with respect to the ecliptic.[1]

## Physical characteristics

The dark body has been characterized as a C-type asteroid.[3]

### Rotation period

In December 2010, a rotational lightcurve of Shanghai 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 hours with a brightness variation of 0.16 magnitude ({{{1}}}).[6]

One month later in January 2011, a similar period of 5.99 hours with an amplitude of 0.16 magnitude was derived by French amateur astronomer Pierre Antonini ({{{1}}}).[7]

### Diameter and albedo

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

## Naming

This 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] The official naming citation was published by the Minor Planet Center on 1 June 1981 (M.P.C. 6059).[10]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 2197 Shanghai (1965 YN)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002197. Retrieved 11 June 2017.
2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(2197) Shanghai". Dictionary of Minor Planet Names – (2197) Shanghai. Springer Berlin Heidelberg. p. 179. doi:10.1007/978-3-540-29925-7_2198. ISBN 978-3-540-00238-3.
3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "LCDB Data for (2197) Shanghai". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2197|Shanghai. Retrieved 1 September 2016.
4. ↑ 4.0 4.1 4.2 4.3 4.4 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 1 September 2016.
5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
6. ↑ 6.0 6.1 6.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 1 September 2016.
7. ↑ 7.0 7.1 Behrend, Raoul. "Asteroids and comets rotation curves – (2197) Shanghai". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#002197. 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 1 September 2016.
9. ↑ "2197 Shanghai (1965 YN)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2197. Retrieved 1 September 2016.
10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 1 September 2016.

## External links

* Asteroid Lightcurve Database (LCDB), query form (info )
* 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
* 2197 Shanghai at AstDyS-2, Asteroids—Dynamic Site
* Ephemeris * Observation prediction * Orbital info * Proper elements * Observational info
* 2197 Shanghai at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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