1520 Imatra

1520 Imatra
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Observatory
Discovery date 22 October 1938
Designations
MPC designation 1520 Imatra
Named after
 Imatra (Finnish town)[2]
1938 UY · 1938 YH
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 77.45 yr (28289 days)
Aphelion 3.4128 AU (510.55 Gm)
Perihelion 2.8047 AU (419.58 Gm)
3.1088 AU (465.07 Gm)
Eccentricity 0.097813
5.48 yr (2002.1 d)
108.17°
0° 10m 47.316s / day
Inclination 15.239°
253.47°
116.43°
Earth MOID 1.84484 AU (275.984 Gm)
Jupiter MOID 2.10282 AU (314.577 Gm)
Jupiter Tisserand parameter 3.158
Physical characteristics
Dimensions 53.61 km[4]
55.55±0.60 km[5]
56.094±1.824 km[6]
58.63±0.70 km[7]
53.45 km (derived)[3]
Mean radius
 26.805±0.7 km
18.635 h (0.7765 d)[1][8]
5.23 h[9]
18.609±0.004 h[10]
0.0615[4]
0.058±0.002[5]
0.0561±0.0109[6]
0.039±0.009[7]
0.0469 (derived)[3]
0.0615±0.003[1]
SMASS = C
C [3]
10.4

    1520 Imatra, provisional designation 1938 UY, is a large carbonaceous asteroid from the outer region of the asteroid belt, about 54 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland on 22 October 1938.[11]

    The dark C-type asteroid orbits the Sun at a distance of 2.8–3.4 AU once every 5 years and 6 months (2,002 days). Its orbit is tilted by 15 degrees to the plane of the ecliptic and shows an eccentricity of 0.10. It takes about 18.635 hours to rotate once around its axis.[8][9][10] According to the space-based surveys carried out by IRAS, Akari, WISE/NEOWISE, the body's low albedo is between 0.04 and 0.06.[4][5][6][7]

    The minor planet is named for the south-eastern Finnish town Imatra, located in South Karelia near the Russian border, about half way in between St Petersburg and Finland's capital Helsinki.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1520 Imatra (1938 UY)" (2015-11-02 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1520) Imatra. Springer Berlin Heidelberg. p. 121. ISBN 978-3-540-29925-7. Retrieved 7 December 2015.
    3. 1 2 3 4 "LCDB Data for (1520) Imatra". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 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 7 December 2015.
    5. 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; Ishihara, Daisuke; 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 7 December 2015.
    6. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; McMillan, R. S.; 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.
    7. 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.
    8. 1 2 Warner, Brian D. (January 2009). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September". The Minor Planet Bulletin. 36 (1): 7–13. Bibcode:2009MPBu...36....7W. ISSN 1052-8091. Retrieved 7 December 2015.
    9. 1 2 de Sanctis, M. C.; Barucci, M. A.; Angeli, C. A.; Fulchignoni, M.; Burchi, R.; Angelini, P. (October 1994). "Photoelectric and CCD observations of 10 asteroids". Planetary and Space Science: 859–864. Bibcode:1994P&SS...42..859D. doi:10.1016/0032-0633(94)90066-3. ISSN 0032-0633. Retrieved 7 December 2015.
    10. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1520) Imatra". Geneva Observatory. Retrieved 7 December 2015.
    11. ↑ "1520 Imatra (1938 UY)". Minor Planet Center. Retrieved 7 December 2015.

    External links


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