_Kevola.png) Shape model of Kevola from its
lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | L. Oterma |
| Discovery site | Turku Obs. |
| Discovery date | 16 November 1938 |
| Designations | |
| (1540) Kevola | |
Named after | Kevola Observatory [2] |
| 1938 WK · 1926 GT 1933 UM · 1933 WR 1936 KL · 1937 QG 1940 EJ | |
|
main-belt · (
outer)
[3] background [4] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 ( JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 91.23 yr (33,320 days) |
| Aphelion | 3.0937 AU |
| Perihelion | 2.6068 AU |
| 2.8502 AU | |
| Eccentricity | 0.0854 |
| 4.81 yr (1,758 days) | |
| 37.259 ° | |
| 0° 12m 17.28s / day | |
| Inclination | 11.971° |
| 52.468° | |
| 113.68° | |
| Physical characteristics | |
| Dimensions | 37.12±13.60 km
[5] 40.16±0.59 km [6] 40.22±13.69 km [7] 43.875±0.318 km [8] 44.18±1.7 km [9] 44.22 km (derived) [3] |
| 20.071±0.0119 h
[10] 20.082±0.001 h [11] | |
| 0.0433±0.004
[9] 0.0474 (derived) [3] 0.048±0.008 [8] 0.05±0.04 [7] 0.053±0.002 [6] 0.06±0.05 [5] | |
| C (assumed) [3] | |
| 10.640±0.003 (R) [10] · 10.70 [3] [7] [8] · 10.80 [1] [6] [9] · 10.83 [5] · 10.83±0.36 [12] | |
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. [13] The asteroid was named after the Finnish Kevola Observatory. [2]
Orbit and classification
Kevola is a non- family asteroid of the main belt's background population. [4] 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. [1]
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. [13]
Naming
This minor planet was named for the Finnish Kevola Observatory ( 064). [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3930). [14]
Physical characteristics
Kevola is an assumed carbonaceous C-type asteroid. [3]
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-). [11] 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). [10]
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. [5] [6] [7] [8] [9]
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. [3]
References
- ^ a b c d "JPL Small-Body Database Browser: 1540 Kevola (1938 WK)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 8 October 2017.
- ^ a b c 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.
- ^ a b c d e f g "LCDB Data for (1540) Kevola". Asteroid Lightcurve Database (LCDB). Retrieved 8 October 2017.
- ^ a b "Asteroid 1540 Kevola – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
- ^ a b c d 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.
- ^ a b c d 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)
- ^ a b c d 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.
- ^ a b c d 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.
- ^ a b c d 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.
- ^ a b c 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.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1540) Kevola". Geneva Observatory. Retrieved 8 October 2017.
- ^ 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.
- ^ a b "1540 Kevola (1938 WK)". Minor Planet Center. Retrieved 8 October 2017.
- ^ 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.
External links
- Asteroid Lightcurve Database (LCDB), query form ( info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1540 Kevola at AstDyS-2, Asteroids—Dynamic Site
- 1540 Kevola at the JPL Small-Body Database
