2091 Sampo

2091 Sampo
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Observatory
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 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 91.39 yr (33380 days)
Aphelion 3.1997 AU (478.67 Gm)
Perihelion 2.8291 AU (423.23 Gm)
3.0144 AU (450.95 Gm)
Eccentricity 0.061465
5.23 yr (1911.6 d)
246.50°
0° 11m 17.952s / day
Inclination 11.379°
114.55°
318.97°
Earth MOID 1.8548 AU (277.47 Gm)
Jupiter MOID 1.98699 AU (297.249 Gm)
Jupiter Tisserand parameter 3.216
Physical characteristics
Dimensions 30.48 km[4]
35.47±0.45 km[5]
23.493±0.240 km[6]
30.32 km (derived)[3]
Mean radius
 15.24 ± 0.65 km
71.34 h (2.973 d) h[1]
71.34±0.05 h[7]
0.1582 ± 0.014[4][1]
0.118±0.003[5]
0.2683±0.0325[6]
0.1329 (derived)[3]
S [3]
10.4

    2091 Sampo, provisional designation 1941 HO, is a stony, slowly rotating asteroid from the outer region of the asteroid belt, about 30 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory on 26 April 1941.[8]

    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 (1,911 days). Its orbit shows an eccentricity of 0.06 and is tilted by 11 degrees to the plane of the ecliptic. The S-type asteroid has a geometric albedo in the range of 0.12–0.27, according to the surveys carried out by IRAS, Akari, and NEOWISE.[4][5][6] It has a long rotation period of 71.3 hours.[7]

    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]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 2091 Sampo (1941 HO)" (2015-06-21 last obs.). Jet Propulsion Laboratory. Retrieved 17 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2091) Sampo. Springer Berlin Heidelberg. pp. 169–170. ISBN 978-3-540-29925-7. Retrieved 10 November 2015.
    3. 1 2 3 4 "LCDB Data for (2091) Sampo". Asteroid Lightcurve Database (LCDB). Retrieved 10 November 2015.
    4. 1 2 3 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 10 November 2015.
    5. 1 2 3 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 10 November 2015.
    6. 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 10 November 2015.
    7. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (2091) Sampo". Geneva Observatory. Retrieved 10 November 2015.
    8. ↑ "2091 Sampo (1941 HO)". Minor Planet Center. Retrieved 10 November 2015.

    External links


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