1694 Kaiser
| Discovery [1] | |
|---|---|
| Discovered by | H. van Gent |
| Discovery site | Johannesburg Obs. (Leiden Southern Station) |
| Discovery date | 29 September 1934 |
| Designations | |
| MPC designation | 1694 Kaiser |
|
Named after
|
Frederik Kaiser (astronomer)[2] |
| 1934 SB · 1960 SD | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 80.88 yr (29,542 days) |
| Aphelion | 3.0142 AU |
| Perihelion | 1.7754 AU |
| 2.3948 AU | |
| Eccentricity | 0.2586 |
| 3.71 yr (1,354 days) | |
| 272.44° | |
| Inclination | 11.102° |
| 13.424° | |
| 356.20° | |
| Physical characteristics | |
| Dimensions | 13.84±1.27 km[4] 15.678±0.175 km[5] 28.42 km (calculated)[3] |
| 13.02 h[6] 13.23±0.02 h[7] 9 h[lower-alpha 1] |
|
| 0.241±0.046[4] 0.1659±0.0088[5] 0.057 (assumed)[3] |
|
| B–V = 0.735 U–B = 0.415 Tholen = GC C [3] |
|
| 11.46 | |
1694 Kaiser, provisional designation 1934 SB, is an eccentric, carbonaceous asteroid from the inner regions of the asteroid belt, roughly 16 kilometers in diameter. It was discovered by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa on 29 September 1934.[8]
The asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3.71 years (1,354 days). Its eccentric orbit of 0.26 is inclined by 11 degrees towards the plane of the ecliptic. The GC-/C-type asteroid has a noticeably high geometric albedo of 0.241±0.046 and 0.1659±0.0088, determined by the Akari and NEOWISE surveys, respectively, while the Lightcurve Database project assumes a much lower value of 0.06.[3][4][5]
Photometric observations in 2006 at the Palmer Divide Observatory in Colorado (see video in § External links) were used to generate a light-curve with a period of 13.23±0.02 hours and a variation in brightness of 0.13±0.02 magnitude.[7] A refined observation in 2012 gave a period of 13.02±0.01 hours with a higher amplitude of 0.32.[6]
The asteroid was named in honor of Dutch astronomer Frederik Kaiser (1808–1872), the director of the Leiden Observatory from 1837–1872. He founded the new Leiden Observatory and stimulated Dutch astronomical research. Frederick Kaiser is also honored by the lunar and Martian craters Kaiser.[2] Originally, the asteroid was erroneously named Kapteyn (MPC 2822), and only later it was noticed that the Duch astronomer Jacobus Kapteyn was already honored by the minor planet 818 Kapteynia.
References
- ↑ CALL (2011web) gives a rotation period of 9 hours. Summary figures at LCDB Data for (1694) Kaiser
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- The Palmer Divide Observatory: Tour given by Brian Warner on YouTube (time 4:03 min.)
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1694 Kaiser at the JPL Small-Body Database
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