3212 Agricola

3212 Agricola
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Obs.
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 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 78.16 yr (28,547 days)
Aphelion 2.5985 AU
Perihelion 1.9144 AU
2.2564 AU
Eccentricity 0.1516
3.39 yr (1,238 days)
63.7574°
0° 17m 26.88s / day
Inclination 7.8104°
109.9734°
35.1017°
Physical characteristics
Dimensions 4.442±0.287 km[4]
5.41 km (calculated)[3]
9 h[lower-alpha 1]
0.3907±0.0697[4]
0.24 (assumed)[3]
S [3]
13.6[1]
13.4[4]
13.38±0.52[5]
13.5[3]

    3212 Agricola, provisional designation 1938 DH2, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, on 19 February 1938.[6]

    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 has an eccentricity of 0.15 and an inclination of 8° with respect to the plane of the ecliptic.[1]

    A rotational light-curve obtained from photometric observations by Czech astronomer Petr Pravec in May 2006, rendered a period of 9 hours with a brightness variation of 0.07 in magnitude (U=n/a).[lower-alpha 1] According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 4.4 kilometers in diameter, and its surface has a high albedo of 0.39,[4] while the Collaborative Asteroid Lightcurve Link assumes an intermediate albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a larger diameter of 5.4 kilometers.[3]

    The minor planet was named in honor of Finnish clergyman Mikael Agricola (c. 1510–1557), bishop and reformer of Finland, often called "father of Finnish literature". He published his Abckiria, the first book printed in the Finnish language, and translated the New Testament into Finnish.[2] Naming citation was published on 27 June 1991 (M.P.C. 18450).[7]

    References

    1. 1 2 Pravec (2006) web: rotation period 9 hours with a brightness amplitude of 0.07 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (3212) Agricola
    1. 1 2 3 4 "JPL Small-Body Database Browser: 3212 Agricola (1938 DH2)" (2016-04-17 last obs.). Jet Propulsion Laboratory. Retrieved May 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (3212) Agricola. Springer Berlin Heidelberg. p. 267. ISBN 978-3-540-00238-3. Retrieved May 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (3212) Agricola". Asteroid Lightcurve Database (LCDB). Retrieved May 2016.
    4. 1 2 3 4 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 May 2016.
    5. ↑ 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 May 2016.
    6. ↑ "3212 Agricola (1938 DH2)". Minor Planet Center. Retrieved May 2016.
    7. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved May 2016.

    External links


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