789 Lena

789 Lena
Discovery [1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date24 June 1914
Designations
(789) Lena
Pronunciation/ˈleɪnə/[2]
Named after
Elena Neujmina
(discoverer's family)[3]
1914 UU · 1970 CE
main-belt · (middle) [4]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc81.69 yr (29,837 days)
Aphelion3.0817 AU
Perihelion2.2907 AU
2.6862 AU
Eccentricity0.1472
4.40 yr (1,608 days)
110.02°
0° 13m 26.04s / day
Inclination10.781°
232.62°
44.006°
Physical characteristics
Dimensions20.56±0.34 km[5]
22.483±0.306[6]
23.871±0.162 km[7]
24.18 km (calculated)[4]
5.84239±0.00001 h[8]
5.848±0.001 h[9]
5.85±0.05 h[10]
22 h[11]
0.10 (assumed)[4]
0.1373±0.0147[7]
0.153±0.028[6]
0.186±0.007[5]
SMASS = X [1] · M [7] · X [4]
10.47±0.60[12] · 10.9[5][7] · 11.2[1][4]

789 Lena, provisional designation 1914 UU, is a metallic asteroid from the middle region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 24 June 1914, by Soviet–Russian astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula, and named after the discoverer's mother.[13]

  1. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Masiero-2014 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference WISE was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Durech-2016 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Shipley-2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gil-Hutton-1995c was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference MPC-Lena was invoked but never defined (see the help page).