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1540 Kevola

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Main-belt asteroid

1540 Kevola
Shape model of Kevola from its lightcurve
Discovery
Discovered byL. Oterma
Discovery siteTurku Obs.
Discovery date16 November 1938
Designations
MPC designation(1540) Kevola
Named afterKevola Observatory
Alternative designations1938 WK · 1926 GT
1933 UM · 1933 WR
1936 KL · 1937 QG
1940 EJ
Minor planet categorymain-belt · (outer)
background
Orbital characteristics
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc91.23 yr (33,320 days)
Aphelion3.0937 AU
Perihelion2.6068 AU
Semi-major axis2.8502 AU
Eccentricity0.0854
Orbital period (sidereal)4.81 yr (1,758 days)
Mean anomaly37.259°
Mean motion0° 12 17.28 / day
Inclination11.971°
Longitude of ascending node52.468°
Argument of perihelion113.68°
Physical characteristics
Dimensions37.12±13.60 km
40.16±0.59 km
40.22±13.69 km
43.875±0.318 km
44.18±1.7 km
44.22 km (derived)
Synodic rotation period20.071±0.0119 h
20.082±0.001 h
Geometric albedo0.0433±0.004
0.0474 (derived)
0.048±0.008
0.05±0.04
0.053±0.002
0.06±0.05
Spectral typeC  (assumed)
Absolute magnitude (H)10.640±0.003 (R) · 10.70 · 10.80 · 10.83 · 10.83±0.36

1540 Kevola, provisional designation 1938 WK, is a dark background asteroid from the outer regions of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 16 November 1938, by astronomer Liisi Oterma at the Iso-Heikkilä Observatory in Turku, Finland. The asteroid was named after the Finnish Kevola Observatory.

Orbit and classification

Kevola is a non-family asteroid of the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,758 days). Its orbit has an eccentricity of 0.09 and an inclination of 12° with respect to the ecliptic.

The body's observation arc begins with its first identification as 1926 GT at Heidelberg Observatory in April 1926, more than 12 years prior to its official discovery observation at Turku.

Naming

This minor planet was named for the Finnish Kevola Observatory (064). The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3930).

Physical characteristics

Kevola is an assumed carbonaceous C-type asteroid.

Rotation period

In February 2007, a rotational lightcurve of Kevola was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a rotation period of 20.082 hours with a brightness variation of 0.23 magnitude (U=3-). Another lightcurve obtained by astronomers at the Palomar Transient Factory in October 2010, gave a concurring period of 20.071 hours with an amplitude of 0.33 magnitude (U=2).

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kevola measures between 37.12 and 44.18 kilometers in diameter and its surface has an albedo between 0.0433 and 0.06.

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0474 and a diameter of 44.22 kilometers based on an absolute magnitude of 10.7.

References

  1. ^ "JPL Small-Body Database Browser: 1540 Kevola (1938 WK)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 8 October 2017.
  2. ^ Schmadel, Lutz D. (2007). "(1540) Kevola". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 122. doi:10.1007/978-3-540-29925-7_1541. ISBN 978-3-540-00238-3.
  3. ^ "LCDB Data for (1540) Kevola". Asteroid Lightcurve Database (LCDB). Retrieved 8 October 2017.
  4. ^ "Asteroid 1540 Kevola – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
  5. ^ Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
  6. ^ 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. (online, AcuA catalog p. 153)
  7. ^ Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID 9341381. Retrieved 8 October 2017.
  8. ^ Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. S2CID 46350317. Retrieved 8 October 2017.
  9. ^ Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
  10. ^ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. S2CID 8342929. Retrieved 8 October 2017.
  11. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (1540) Kevola". Geneva Observatory. Retrieved 8 October 2017.
  12. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 8 October 2017.
  13. ^ "1540 Kevola (1938 WK)". Minor Planet Center. Retrieved 8 October 2017.
  14. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. Bibcode:2009dmpn.book.....S. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

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