2114 Wallenquist
| Discovery [1] | |
|---|---|
| Discovered by | C.-I. Lagerkvist |
| Discovery site | Mount Stromlo Obs. |
| Discovery date | 19 April 1976 |
| Designations | |
| 2114 Wallenquist | |
Named after | Åke Wallenquist (astronomer)[2] |
| 1976 HA · 1930 DG 1942 LD · 1953 GZ 1964 FA · 1970 EO3 1970 EZ2 | |
| main-belt · Themis [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.66 yr (22,886 days) |
| Aphelion | 3.6522 AU |
| Perihelion | 2.7458 AU |
| 3.1990 AU | |
| Eccentricity | 0.1416 |
| 5.72 yr (2,090 days) | |
| 348.00° | |
| Inclination | 0.5560° |
| 1.5589° | |
| 216.83° | |
| Physical characteristics | |
| Dimensions | 27.67±2.3 km (IRAS:2)[4] 21.12±1.26 km[5] 23.008±0.190 km[6] 27.45 km (derived)[3] |
| 5.510±0.005 h[7] 5.49±0.01 h[8] 5.5078±0.0009 h[9] | |
| 0.0838±0.016 (IRAS:2)[4] 0.149±0.020[5] 0.1216±0.0099[6] 0.0447 (derived)[3] | |
| S [3] | |
| 11.8[1] | |
2114 Wallenquist, provisional designation 1976 HA, is a Themistian asteroid from the outer region of the asteroid belt, about 28 kilometers in diameter. It was discovered by Swedish astronomer Claes-Ingvar Lagerkvist at the Australian Mount Stromlo Observatory near Canberra, on 19 April 1976.[10]
The 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 2.7–3.7 AU once every 5 years and 9 months (2,090 days). Its orbit shows an eccentricity of 0.14 and an inclination of 1 degree from the plane of the ecliptic.[1]
In 2010, a photometric light-curve analysis at the U.S. Goat Mountain Astronomical Research Station (GMARS), California, rendered a well-defined rotation period of 5.510±0.005 hours with a brightness amplitude of 0.22 in magnitude.[7] Two other observations, by French astronomer René Roy at Blauvac Observatory, France, and at the U.S. Palomar Transient Factory gave a period of 5.49±0.01 and 5.5078±0.0009, with an amplitude of 0.30 and 0.23, respectively.[8][9]
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, the asteroid measures between 21.1 and 27.6 kilometers in diameter while its surface has an albedo in the range of 0.08 and 0.15.[4][5][6] The Collaborative Asteroid Lightcurve Link (CALL) derives an even lower albedo of 0.04 and calculates a diameter of 27.5 kilometer. Despite its low albedo, CALL classifies the body as a S-type rather than a darker C-type asteroid.[3]
The minor planet was named in honor of Swedish astronomer Åke Wallenquist (1904–1994), former director of the Kvistaberg Station, after which the minor planet 3331 Kvistaberg is named. After his retirement he was still active at the Uppsala Astronomical Observatory, where he studied dark matter in open clusters. Wallenquist co-discovered the near-Earth Amor asteroid 1980 Tezcatlipoca during his stay at the U.S. Palomar Observatory in 1950.[2]
References
- ^ a b c d "JPL Small-Body Database Browser: 2114 Wallenquist (1976 HA)" (2015-12-02 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
{{cite web}}: Check date values in:|accessdate=(help) - ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2114) Wallenquist. Springer Berlin Heidelberg. pp. 171–172. ISBN 978-3-540-00238-3. Retrieved January 2016.
{{cite book}}: Check date values in:|accessdate=(help) - ^ a b c d e "LCDB Data for (2114) Wallenquist". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
{{cite web}}: Check date values in:|accessdate=(help) - ^ a b c 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. Retrieved January 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b c 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. Retrieved January 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b c 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. Retrieved January 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b Stephens, Robert D. (October 2010). "Asteroids Observed from GMARS and Santana Observatories: 2010 April - June". The Minor Planet Bulletin. 37 (4): 159–161. Bibcode:2010MPBu...37..159S. ISSN 1052-8091. Retrieved January 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2114) Wallenquist". Geneva Observatory. Retrieved January 2016.
{{cite web}}: Check date values in:|accessdate=(help) - ^ a b 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. Retrieved January 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ "2114 Wallenquist (1976 HA)". Minor Planet Center. Retrieved January 2016.
{{cite web}}: Check date values in:|accessdate=(help)
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
- 2114 Wallenquist at the JPL Small-Body Database
_mathilde.jpg){kind=small} | This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |