2091 Sampo

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2091 Sampo
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Obs.
Discovery date 26 April 1941
Designations
MPC designation 2091 Sampo
Named after
Sampo
(Finnish mythology)[2]
1941 HO · 1931 MG
1938 UF1 · 1951 GA1
1952 LB · 1956 EP
1971 BH1 · 1978 NB
A924 BB
main-belt · Eos[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 92.78 yr (33,889 days)
Aphelion 3.1993 AU
Perihelion 2.8299 AU
3.0146 AU
Eccentricity 0.0613
5.23 yr (1,912 days)
321.91°
0° 11m 17.88s / day
Inclination 11.377°
114.54°
318.88°
Physical characteristics
Dimensions 23.024±0.474 km[4]
23.493±0.240 km[5]
30.25 km (derived)[3]
30.48±1.3 km[6]
35.47±0.45 km[7]
71.34±0.05 h[8]
0.118±0.003[7]
0.1218 (derived)[3]
0.1582±0.014[6]
0.2683±0.0325[5]
0.277±0.019[4]
S[3]
10.2[5][6][7] · 10.5[1][3]

2091 Sampo, provisional designation 1941 HO, is a stony Eos asteroid and relatively slow rotator from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 26 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory, Finland.[9]

The asteroid is a member of the Eos family, a group of asteroids thought to have formed by a single collision that disrupted their 240-kilometer sized parent body some 1.1 billion years ago. It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,912 days). Its orbit has an eccentricity of 0.06 and an inclination of 11° with respect to the ecliptic.[1] The S-type asteroid measures between 23.0 and 35.5 kilometers in diameter, and its surface has an albedo between 0.118 and 0.277, according to the surveys carried out by IRAS, Akari, and NEOWISE.[4][5][6][7]

A rotational light-curve was obtained from photometric observations made by astronomers René Roy, Laurent Bernasconi and Stéphane Charbonnelat in March 2003. It gave a potentially long rotation period of 71.34±0.05 hours with a brightness variation of 0.38 magnitude (U=2).[8]

It was named after the wonder-object Sampo from Finnish mythology. It is mentioned in the national oral folklore and mythology epic, Kalevala, after which the minor planet 1454 Kalevala is named. Sampo was to produce every kind of fortune. When Kalevala and Pohjola (also see 3606 Pohjola) were fighting for its possession it broke into pieces.[2] Naming citation was published on 1 August 1980 (M.P.C. 5450).[10]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 2091 Sampo (1941 HO)" (2016-11-11 last obs.). Jet Propulsion Laboratory. Retrieved 7 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2091) Sampo. Springer Berlin Heidelberg. pp. 169–170. ISBN 978-3-540-00238-3. Retrieved 7 December 2016. 
  3. ^ a b c d e "LCDB Data for (2091) Sampo". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 2016. 
  4. ^ 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:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 7 December 2016. 
  5. ^ 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" (PDF). 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 2016. 
  6. ^ 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. Bibcode:2004PDSS...12.....T. Retrieved 7 December 2016. 
  7. ^ 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" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 7 December 2016. 
  8. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2091) Sampo". Geneva Observatory. Retrieved 7 December 2016. 
  9. ^ "2091 Sampo (1941 HO)". Minor Planet Center. Retrieved 7 December 2016. 
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 December 2016. 

External links[edit]