سیارک ۲۱۱۴

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سیارک ۲۱۱۴ (به انگلیسی: 2114 Wallenquist، نامگذاری:1976HA) دو هزار و صد و چهاردهمین سیارک کشف شده‌است[۱] که در ۱۹ آوریل ۱۹۷۶ کشف شد.[۲]

قدر مطلق سیارک برابر ۱۱٫۱۰ است.[۳]

منابع[ویرایش]

  1. طبق اینجا شماره سیارک معرف شماره کشف شدن آنهاست.
  2. «فهرست سیارک‌های شماره‌دار». دانشگاه هاروارد. دریافت‌شده در ۲۸ سپتامبر ۲۰۰۹.
  3. «فهرست داده‌های سیارک‌ها». ناسا. بایگانی‌شده از روی نسخه اصلی در ۱۳ مه ۲۰۱۹. دریافت‌شده در ۱۴ مه ۲۰۱۹.

پیوند به بیرون[ویرایش]


2114 Wallenquist
Discovery [1]
Discovered byC.-I. Lagerkvist
Discovery siteMount Stromlo Obs.
Discovery date19 April 1976
Designations
MPC designation(2114) Wallenquist
Named after
Åke Wallenquist
(Swedish astronomer)[2]
1976 HA · 1930 DG
1942 LD · 1953 GZ
1964 FA · 1970 EO3
1970 EZ2
main-belt · Themis[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc63.51 yr (23,198 days)
Aphelion3.6508 AU
Perihelion2.7467 AU
3.1987 AU
Eccentricity0.1413
5.72 yr (2,090 days)
91.271°
0° 10m 20.28s / day
Inclination0.5558°
1.5530°
216.98°
Physical characteristics
Dimensions21.12±1.26 km[4]
22.558±0.079[5]
23.008±0.190 km[6]
27.45 km (derived)[3]
27.67±2.3 km (IRAS:2)[7]
5.49±0.01 h[8]
5.5078±0.0009 h[9]
5.510±0.005 h[10]
0.0447 (derived)[3]
0.0838±0.016 (IRAS:2)[7]
0.1216±0.0099[6]
0.145±0.019[5]
0.149±0.020[4]
S[3]
11.1[7][4][6] · 11.749±0.002 (R)[9] · 11.8[1][3] · 11.87±0.23[11]

2114 Wallenquist, provisional designation 1976 HA, is a Themistian asteroid from the outer region of the asteroid belt, approximately 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.[12]

Orbit and classification

Wallenquist is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.7 AU once every 5 years and 9 months (2,090 days). Its orbit has an eccentricity of 0.14 and an inclination of 1° with respect to the ecliptic.[1] The first used observation was made at the U.S. Goethe Link Observatory in 1953, extending the asteroid's observation arc by 23 years prior to its discovery.[12]

Physical characteristics

Rotation period

In April 2010, a rotational lightcurve of Wallenquist obtained by American astronomer Robert Stephens at the Goat Mountain Astronomical Research Station (GMARS, G79), California, gave a well-defined rotation period of 5.510 hours with a brightness amplitude of 0.22 magnitude (U=3).[10]

Two other observations, by French astronomer René Roy at Blauvac Observatory (627), France, and by astronomers 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 (U=2/2).[8][9]

Diameter and albedo

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, Wallenquist 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][7]

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 characterizes the body as a S-type rather than a darker C-type asteroid.[3]

Naming

This 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.[2]

After his retirement Wallenquist continued to research dark matter in open clusters at the Uppsala Astronomical Observatory. He co-discovered the near-Earth Amor asteroid 1980 Tezcatlipoca during his stay at the Palomar Observatory in California in 1950.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4645).[13]

References

  1. ^ a b c d "JPL Small-Body Database Browser: 2114 Wallenquist (1976 HA)" (2016-10-09 last obs.). Jet Propulsion Laboratory. Retrieved 11 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(2114) Wallenquist". Dictionary of Minor Planet Names – (2114) Wallenquist. Springer Berlin Heidelberg. pp. 171–172. doi:10.1007/978-3-540-29925-7_2115. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (2114) Wallenquist". Asteroid Lightcurve Database (LCDB). Retrieved 4 July 2016.
  4. ^ 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". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 4 July 2016.
  5. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 7 December 2016.
  6. ^ a b c d 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.
  7. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 4 July 2016.
  8. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2114) Wallenquist". Geneva Observatory. Retrieved 4 July 2016.
  9. ^ 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 4 July 2016.
  10. ^ 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 4 July 2016.
  11. ^ 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 4 July 2016.
  12. ^ a b "2114 Wallenquist (1976 HA)". Minor Planet Center. Retrieved 4 July 2016.
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 July 2016.

External links