Astronomy:7545 Smaklösa

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7545 Smaklösa
Discovery [1]
Discovered byC.-I. Lagerkvist
Discovery siteMount Stromlo Obs.
Discovery date28 July 1978
Designations
(7545) Smaklösa
Named afterSmaklösa
(Swedish band)[2]
1978 OB · 1995 OP
Minor planet categorymain-belt · (inner) [3]
background
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc38.61 yr (14,104 days)
|{{{apsis}}}|helion}}2.7888 AU
|{{{apsis}}}|helion}}1.7342 AU
2.2615 AU
Eccentricity0.2332
Orbital period3.40 yr (1,242 days)
Mean anomaly174.45°
Mean motion0° 17m 23.28s / day
Inclination6.5200°
Longitude of ascending node114.89°
200.04°
Physical characteristics
Dimensions4.131±0.112 km[4][5]
4.30 km (calculated)[3]
Rotation period14.3002±0.0218 h[6]
14.322±0.004[7]
14.330±0.220 h[8]
Geometric albedo0.20 (assumed)[3]
0.237±0.025[4][5]
S [3]
Absolute magnitude (H)14.1[4] · 14.2[1][3] · 14.650±0.300 (R)[8] · 14.666±0.005 (R)[6]


7545 Smaklösa, provisional designation 1978 OB, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 28 July 1978, by Swedish astronomer Claes-Ingvar Lagerkvist at Mount Stromlo Observatory in Canberra, Australia.[9] The asteroid was named for the Swedish band Smaklösa.[2]

Orbit and classification

Smaklösa orbits the Sun in the inner main-belt at a distance of 1.7–2.8 AU once every 3 years and 5 months (1,242 days). Its orbit has an eccentricity of 0.23 and an inclination of 7° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with its discovery in 1978.[9]

Physical characteristics

Lightcurves

In August 2012, a rotational lightcurve of Smaklösa was obtained at the Oakley Southern Sky Observatory in Coonabarabran, Australia. The photometric observation showed a well-defined rotation period of 14.322±0.004 hours with a brightness variation of 0.75 in magnitude ({{{1}}}).[7] Similar periods of 14.330±0.220 and 14.3002±0.0218 hours were derived at the U.S Palomar Transient Factory in 2014 ({{{1}}}).[6][8]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Smaklösa measures 4.1 kilometers in diameter and its surface has an albedo of 0.24,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 4.3 kilometers.[3]

Naming

This minor planet was named after the Gotlandic music group Smaklösa. (Literally "Flavourless", but also "Tasteless" or "Tacky". The latter meaning is intended here as indicated by the name of their own record label "Tasteless Records").[10]

The Swedish band gave a number of concerts on the island of Gotland. They are known for their cleverly phrased lyrics mixed with the local humor of the island. The discoverer of this minor planet has named it after the band, grateful for having attended their concerts in 1998, which are unforgettable to him.[2] The official naming citation was published by the Minor Planet Center on 8 December 1998 (M.P.C. 33387).[11]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 7545 Smaklosa (1978 OB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007545. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(7545) Smaklösa". Dictionary of Minor Planet Names – (7545) Smaklösa. Springer Berlin Heidelberg. p. 602. doi:10.1007/978-3-540-29925-7_6546. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (7545) Smaklosa". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=7545%7CSmaklosa. 
  4. ↑ 4.0 4.1 4.2 4.3 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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M. Retrieved 17 May 2016. 
  5. ↑ 5.0 5.1 5.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 4 December 2016. 
  6. ↑ 6.0 6.1 6.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 17 May 2016. 
  7. ↑ 7.0 7.1 Simpson, Gary; Chong, Elena; Gerhardt, Michael; Gorsky, Sean; Klaasse, Matthew; Kodalen, Brian et al. (July 2013). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2012 August - October". The Minor Planet Bulletin 40 (3): 146–151. ISSN 1052-8091. Bibcode: 2013MPBu...40..146S. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40..146S. Retrieved 14 April 2016. 
  8. ↑ 8.0 8.1 8.2 Chang, Chan-Kao (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series 219 (2): 19. doi:10.1088/0067-0049/219/2/27. Bibcode: 2015ApJS..219...27C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJS..219...27C. Retrieved 17 May 2016. 
  9. ↑ 9.0 9.1 "7545 Smaklosa (1978 OB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=7545. 
  10. ↑ Larson, Johanna (16 December 2014). "Kulturpriset till Smaklösa" (in sv). Gotland Municipality. http://www.gotland.se/28383. 
  11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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