1523 Pieksämäki

1523 Pieksämäki
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Observatory
Discovery date 18 January 1939
Designations
MPC designation 1523 Pieksamaki
Named after
 Pieksämäki
(Finnish town)[2]
1939 BC · 1936 FO1
1936 HC · 1946 GB
1949 AC
main-belt · Flora [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 80.08 yr (29248 days)
Aphelion 2.4518 AU (366.78 Gm)
Perihelion 2.0332 AU (304.16 Gm)
2.2425 AU (335.47 Gm)
Eccentricity 0.093348
3.36 yr (1226.6 d)
13.367°
0° 17m 36.6s / day
Inclination 5.1419°
327.80°
187.82°
Earth MOID 1.04205 AU (155.888 Gm)
Jupiter MOID 2.53979 AU (379.947 Gm)
Jupiter Tisserand parameter 3.622
Physical characteristics
Dimensions 10.008±0.057 km[4]
9.11±0.31 km[5]
9.41 km (calculated)[3]
5.3202 h (0.22168 d)[1][6][7]
5.33 h[8]
5.3210±0.0001 h[9]
0.2135±0.0277[4]
0.505±0.294[5]
0.24 (assumed)[3]
S [3]
12.4

    1523 Pieksämäki, provisional designation 1939 BC, is a stony asteroid from the inner regions of the asteroid belt, about 10 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland, on 18 January 1939.[10]

    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 2.0–2.5 AU once every 3 years and 4 months (1,226 days). Its orbit is tilted by 5 degrees to the plane of the ecliptic and shows an orbital eccentricity of 0.09. It has a well-determined rotation period of 5.32 hours.[6][7][8][9] According to the space-based Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the body's albedo amounts to 0.21 and 0.51,[4][5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24, which is a typical value for a silicaceous asteroid.[3]

    The minor planet is named after Pieksämäki, a eastern Finnish town in Southern Savonia.[2]

    References

    1. 1 2 3 "JPL Small-Body Database Browser: 1523 Pieksamaki (1939 BC)" (2015-11-08 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1523) Pieksämäki. Springer Berlin Heidelberg. p. 121. ISBN 978-3-540-29925-7. Retrieved 7 December 2015.
    3. 1 2 3 4 5 "LCDB Data for (1523) Pieksamaki". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 2015.
    4. 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 7 December 2015.
    5. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; Cabrera, M. S. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 7 December 2015.
    6. 1 2 Pray, Donald P.; Galad, Adrian; Gajdos, Stefan; Vilagi, Jozef; Cooney, Walt; Gross, John; et al. (December 2006). "Lightcurve analysis of asteroids 53, 698, 1016, 1523, 1950, 4608, 5080 6170, 7760, 8213, 11271, 14257, 15350 and 17509". The Minor Planet Bulletin. 33 (4): 92–95. Bibcode:2006MPBu...33...92P. ISSN 1052-8091. Retrieved 7 December 2015.
    7. 1 2 Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; Ivanova, V.; Apostolovska, G.; et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy & Astrophysics. 546: 51. Bibcode:2012A&A...546A..72K. doi:10.1051/0004-6361/201219199. Retrieved 7 December 2015.
    8. 1 2 Lagerkvist, C. I. (April 1979). "A lightcurve survey of asteroids with Schmidt telescopes - Observations of nine asteroids during oppositions in 1977". Icarus: 106–114. Bibcode:1979Icar...38..106L. doi:10.1016/0019-1035(79)90090-3. Retrieved 7 December 2015.
    9. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1523) Pieksamaki". Geneva Observatory. Retrieved 7 December 2015.
    10. ↑ "1523 Pieksamaki (1939 BC)". Minor Planet Center. Retrieved 7 December 2015.

    External links


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