1520 Imatra

1520 Imatra
Discovery[1]
Discovered byY. Väisälä
Discovery siteTurku Obs.
Discovery date22 October 1938
Designations
(1520) Imatra
Named after
Imatra (Finnish town)[2]
1938 UY · 1938 YH
main-belt · (outer)[3]
Ursula[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc78.53 yr (28,682 days)
Aphelion3.4132 AU
Perihelion2.8113 AU
3.1123 AU
Eccentricity0.0967
5.49 yr (2,005 days)
179.71°
0° 10m 46.2s / day
Inclination15.241°
253.40°
116.83°
Physical characteristics
Dimensions53.41 km (derived)[3]
53.42±19.70 km[5]
53.435±0.370 km[6]
53.61±1.4 km[7]
53.79±14.73 km[8]
55.55±0.60 km[9]
56.094±1.824 km[10]
58.63±0.70 km[11]
5.23 h (dated)[12]
18.609±0.004 h[13]
18.635±0.004 h[14]
0.039±0.009[11]
0.04±0.03[8]
0.0428 (derived)[3]
0.05±0.06[5]
0.0561±0.0109[10]
0.058±0.002[9]
0.0615±0.003[7]
0.062±0.006[6]
SMASS = C[1] · C[3]
10.0[7][9][10] · 10.30[8][11] · 10.40±0.35[15] · 10.4[1][3] · 10.43[5]

1520 Imatra, provisional designation 1938 UY, is a carbonaceous Ursula asteroid from the outer region of the asteroid belt, approximately 54 kilometers in diameter. It was discovered on 22 October 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, who named after the Finnish town of Imatra.[2][16]

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  7. ^ a b c Cite error: The named reference SIMPS was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Nugent-2015 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference Masiero-2012 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference De-Sanctis-1994 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Warner-2009b was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference MPC-Imatra was invoked but never defined (see the help page).