3212 Agricola
Discovery [1] | |
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Discovered by | Y. Väisälä |
Discovery site | Turku Observatory |
Discovery date | 19 February 1938 |
Designations | |
MPC designation | 3212 Agricola |
Named after |
Mikael Agricola (reformer)[2] |
1938 DH2 · 1982 BB2 | |
main-belt · Flora [3] | |
Orbital characteristics [1] | |
Epoch 27 June 2015 (JD 2457200.5) | |
Uncertainty parameter 0 | |
Observation arc | 77.83 yr (28,426 days) |
Aphelion | 2.5977 AU |
Perihelion | 1.9146 AU |
2.2561 AU | |
Eccentricity | 0.1514 |
3.39 yr (1,238 days) | |
307.33° | |
Inclination | 7.8115° |
109.98° | |
35.228° | |
Physical characteristics | |
Dimensions |
±0.287 km 4.442[4] 5.41 km (caculated)[3] |
9 h[lower-alpha 1] | |
±0.0697 0.3907[4] 0.24 (assumed)[3] | |
S [3] | |
13.5[1] | |
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3212 Agricola, provisional designation 1938 DH2, is a stony asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, on 19 February 1938.[5]
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.9–2.6 AU once every 3 years and 5 months (1,238 days). Its orbit shows an eccentricity of 0.15 and is tilted by 8 degrees to the plane of the ecliptic.[1] In 2006, a photometric light-curve analysis rendered a rotation period of 9 hours with an amplitude in brightness of 0.07.[lower-alpha 1] Based on observations by the U.S. Wide-field Infrared Survey Explorer, the asteroid's surface has a high albedo of 0.39, while the Collaborative Asteroid Lightcurve Link assumes a more moderate value of 0.24, which is also identical to the albedo of the Flora family's namesake, the asteroid 8 Flora.[3][4]
The minor planet was named for Finnish clergyman Mikael Agricola (c. 1510–1557), bishop and reformer of Finland, often called "father of Finnish literature". Around 1538 he issued his ABC-kiria, the first book printed in the Finnish language, and in 1548 he translated the New Testament into Finnish.[2]
References
- 1 2 Pravec (2006) web: rotation period hours with a brightness amplitude of 9 mag. Summary figures at 0.07Collaborative Asteroid Lightcurve Link (CALL) for (3212) Agricola
- 1 2 3 4 "JPL Small-Body Database Browser: 3212 Agricola (1938 DH2)" (2015-12-18 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (3212) Agricola. Springer Berlin Heidelberg. p. 267. ISBN 978-3-540-29925-7. Retrieved January 2016.
- 1 2 3 4 5 "LCDB Data for (3212) Agricola". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
- 1 2 3 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.
- ↑ "3212 Agricola (1938 DH2)". Minor Planet Center. Retrieved January 2016.
External links
- www.asu.cas.cz/~ppravec/neo.htm Pravec, P.; Wolf, M.; Sarounova, L. (2006)
- 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
- 3212 Agricola at the JPL Small-Body Database
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