2169 Taiwan

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

2169 Taiwan
Discovery[1]
Discovered byPurple Mountain Obs.
Discovery sitePurple Mountain Obs.
Discovery date9 November 1964
Designations
(2169) Taiwan
Named after
Taiwan[2]
1964 VP1 · 1938 DV1
1975 BH1 · 1977 RF8
1979 FG
main-belt · (middle)[3]
Astrid[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc79.28 yr (28,957 days)
Aphelion2.9244 AU
Perihelion2.6564 AU
2.7904 AU
Eccentricity0.0480
4.66 yr (1,703 days)
116.98°
0° 12m 41.4s / day
Inclination1.5286°
71.855°
358.45°
Physical characteristics
Dimensions14.39 km (calculated)[3]
16.52±4.57 km[5]
17.96±4.92 km[6]
18.22±0.51 km[7]
18.39±0.30 km[8]
19.263±0.139 km[9][10]
7.252±0.0014 h[11]
0.042±0.006[9]
0.0423±0.0059[10]
0.05±0.06[5]
0.05±0.07[6]
0.057 (assumed)[3]
0.057±0.015[8]
0.085±0.005[7]
SMASS = C[1] · C[3][12]
12.00[7] · 12.40[8] · 12.488±0.003 (R)[11] · 12.50[6][10] · 12.59±0.32[12] · 12.6[1] · 12.69[5] · 12.94[3]

2169 Taiwan, provisional designation 1964 VP1, is a carbonaceous Astridian asteroid from the central regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 9 November 1964, by astronomers at the Purple Mountain Observatory near Nanking, China.[13] It was named for Taiwan.[2]

Orbit and classification

[edit | edit source]

Taiwan is a member of the Astrid family (515), a smaller asteroid family of nearly 500 carbonaceous asteroids. The family is located in the outermost central main-belt, near a prominent Kirkwood gap, that marks the 5:2 orbital resonance with Jupiter, and divides the asteroid belt into a central and outer part.[4][14][15]: 23 

Taiwan orbits the Sun at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,703 days). Its orbit has an eccentricity of 0.05 and an inclination of 2° with respect to the ecliptic.[1]

The body's observation arc begins with its first identification as 1938 DV1 at Heidelberg Observatory in February 1938, almost 27 years prior to its official discovery observation at Nanking.[13]

Physical characteristics

[edit | edit source]

In the SMASS classification, and according to PanSTARRS photometric survey, Taiwan is a carbonaceous C-type asteroid.[1][12]

Rotation period

[edit | edit source]

In September 2010, a rotational lightcurve of Taiwan was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 7.252 hours with a brightness variation of 0.17 magnitude (U=2).[11]

Diameter and albedo

[edit | edit source]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Taiwan measures between 16.52 and 19.263 kilometers in diameter and its surface has an albedo between 0.042 and 0.085.[5][6][7][8][9][10]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 14.39 kilometers based on an absolute magnitude of 12.94.[3]

Naming

[edit | edit source]

This minor planet was named after the Taiwan Province.[2] The official naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5184).[16]

References

[edit | edit source]
  1. ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  2. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  3. ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  4. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  5. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  6. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  7. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (online, AcuA catalog p. 153)
  8. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  9. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  10. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  11. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  12. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  13. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  14. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  15. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  16. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
[edit | edit source]

Lua error in Module:Authority_control at line 153: attempt to index field 'wikibase' (a nil value).

Retrieved from "http://70.231.62.181/index.php?title=2169_Taiwan&oldid=3018332"