1449 Virtanen

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1449 Virtanen
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Observatory
Discovery date 20 February 1938
Designations
MPC designation 1449 Virtanen
Named after
Artturi Virtanen
(biochemist)[2]
1938 DO · 1928 DC
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 87.88 yr (32099 days)
Aphelion 2.5376 AU (379.62 Gm)
Perihelion 1.9075 AU (285.36 Gm)
2.2225 AU (332.48 Gm)
Eccentricity 0.14175
3.31 yr (1210.2 d)
170.05°
0° 17m 50.892s / day
Inclination 6.6410°
110.78°
132.17°
Earth MOID 0.901193 AU (134.8166 Gm)
Jupiter MOID 2.488 AU (372.2 Gm)
Jupiter Tisserand parameter 3.626
Physical characteristics
Dimensions 9.947±0.092 km[4]
9.46±0.33 km[5]
10.80 km (calculated)[3]
30.495 h (1.2706 d)[1][6]
30.52±0.01 h[7]
30.5±0.5 h[7]
30.5421±0.3727 h[8]
14.770±0.440 h[9]
0.2856±0.0274[4]
0.285±0.038[5]
0.24 (assumed)[3]
Tholen = S
S[3]
12.1

1449 Virtanen, provisional designation 1938 DO, is a stony asteroid from the inner regions of the asteroid belt, about 10 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory on 20 February 1938.[10]

The asteroid is a member of the Flora family, a large group of rocky S-type asteroids in the inner main-belt. It orbits the Sun at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,210 days). Its orbit shows an eccentricity of 0.14 and is tilted by 7 degrees to the plane of the ecliptic. It has an albedo of 0.28, based on observations by the Wide-field Infrared Survey Explorer.[4][5]

Photometric observations during 2008 showed a rotation period of 30.459 ± 0.005 hours and a brightness variation of 0.60 ± 0.02 in magnitude.[6]

The asteroid was named after famous Finnish biochemist Artturi Virtanen (1895–1973), recipient of the 1945 Nobel Prize in Chemistry and president of the Academy of Finland for many years.[2]

References[edit]

  1. ^ a b c "JPL Small-Body Database Browser: 1449 Virtanen (1938 DO)" (2015-10-17 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016. 
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1449) Virtanen. Springer Berlin Heidelberg. p. 116. ISBN 978-3-540-29925-7. Retrieved 20 November 2015. 
  3. ^ a b c d "LCDB Data for (1449) Virtanen". Asteroid Lightcurve Database (LCDB). Retrieved 20 November 2015. 
  4. ^ a b c Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407free to read. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 20 November 2015. 
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; et al. (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:1209.5794free to read. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 20 November 2015. 
  6. ^ a b Oey, Julian (October 2009). "Lightcurve Analysis of Asteroids from Leura and Kingsgrove Observatory in the Second Half of 2008". The Minor Planet Bulletin. 36 (4): 162–164. Bibcode:2009MPBu...36..162O. ISSN 1052-8091. Retrieved 20 November 2015. 
  7. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1449) Virtanen". Geneva Observatory. Retrieved 20 November 2015. 
  8. ^ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041free to read. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 20 November 2015. 
  9. ^ Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series. 219 (2): 19. arXiv:1506.08493free to read. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved 20 November 2015. 
  10. ^ "1449 Virtanen (1938 DO)". Minor Planet Center. Retrieved 20 November 2015. 

External links[edit]