Astronomy:3037 Alku
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 16 January 1944 |
| Designations | |
| (3037) Alku | |
| Named after | Alku (a boat's name)[2] |
| 1944 BA · 1979 BH | |
| Minor planet category | main-belt · (middle) [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 72.87 yr (26,615 days) |
| |{{{apsis}}}|helion}} | 3.1798 AU |
| |{{{apsis}}}|helion}} | 2.1670 AU |
| 2.6734 AU | |
| Eccentricity | 0.1894 |
| Orbital period | 4.37 yr (1,597 days) |
| Mean anomaly | 329.14° |
| Mean motion | 0° 13m 31.8s / day |
| Inclination | 19.022° |
| Longitude of ascending node | 107.80° |
| 330.32° | |
| Physical characteristics | |
| Dimensions | 18.84 km (derived)[3] 18.91±0.8 km (IRAS:8)[4] 26.44±0.61 km[5] 29.289±0.302 km[6] 29.876±0.186[7] |
| Rotation period | 11.844±0.002 h[8] |
| Geometric albedo | 0.0343±0.0090[6] 0.044±0.008[7] 0.061±0.003[5] 0.0949 (derived)[3] 0.1131±0.011 (IRAS:8)[4] |
| SMASS = C [1] · C [3] | |
| Absolute magnitude (H) | 11.6[4][5][6] · 11.8[1][3] |
3037 Alku, provisional designation 1944 BA, is a carbonaceous asteroid from the central region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 17 January 1944, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.[9]
Orbit and classification
The C-type asteroid orbits the Sun in the central main-belt at a distance of 2.2–3.2 AU once every 4 years and 4 months (1,597 days). Its orbit has an eccentricity of 0.19 and an inclination of 19° with respect to the ecliptic.[1] No precoveries were taken before its discovery.[9]
Rotation period
A rotational lightcurve for this asteroid was obtained from photometric measurements taken by American astronomer Brian Warner at the Palmer Divide Observatory, Colorado, in January 2005. The lightcurve gave a well-defined rotation period of 11.844±0.002 hours with a brightness variation of 0.95 in magnitude ({{{1}}}).[8]
Diameter estimates
According to the space-based 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, the asteroid measures between 18.9 and 29.9 kilometers in diameter and it has an albedo in the range of 0.03 to 0.11.[4][5][6][7] The Collaborative Asteroid Lightcurve Link agrees with the results obtained by IRAS, and derives an albedo of 0.09 with a diameter of 18.8 kilometers with an absolute magnitude of 11.8.[3]
Naming
This minor planet was named after the sailing boat Alku ("the beginning" in Finnish). Built by his father, the discoverer used to sail it in his childhood, and it became the origin of his enduring passion for sailing.[2] The approved naming citation was published by the Minor Planet Center on 27 June 1991 (M.P.C. 18450).[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 3037 Alku (1944 BA)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003037.
- ↑ 2.0 2.1 Schmadel, Lutz D. (2007). "(3037) Alku". Dictionary of Minor Planet Names – (3037) Alku. Springer Berlin Heidelberg. p. 250. doi:10.1007/978-3-540-29925-7_3038. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (3037) Alku". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=3037%7CAlku.
- ↑ 4.0 4.1 4.2 4.3 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019.
- ↑ 5.0 5.1 5.2 5.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
- ↑ 6.0 6.1 6.2 6.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ 7.0 7.1 7.2 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M.
- ↑ 8.0 8.1 Warner, Brian D. (September 2005). "Asteroid lightcurve analysis at the Palmer Divide Observatory - winter 2004-2005". The Minor Planet Bulletin 32 (3): 54–58. ISSN 1052-8091. Bibcode: 2005MPBu...32...54W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005MPBu...32...54W. Retrieved 20 December 2015.
- ↑ 9.0 9.1 "3037 Alku (1944 BA)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=3037.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Lightcurve plot of 3037 Alku, Palmer Divide Observatory, B. D. Warner (2004)
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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
- 3037 Alku at AstDyS-2, Asteroids—Dynamic Site
- 3037 Alku at the JPL Small-Body Database
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