Astronomy:1655 Comas Solà

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1655 Comas Solà
Discovery[1]
Discovered byJ. Comas Solà
Discovery siteFabra Obs.
Discovery date28 November 1929
Designations
(1655) Comas Solá
Named afterJosep Comas i Solà
(discoverer himself)[2]
1929 WG · 1929 WC1
1958 BG · A901 VG
Minor planet categorymain-belt · (middle)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc114.97 yr (41,994 days)
|{{{apsis}}}|helion}}3.4357 AU
|{{{apsis}}}|helion}}2.1248 AU
2.7803 AU
Eccentricity0.2358
Orbital period4.64 yr (1,693 days)
Mean anomaly323.81°
Mean motion0° 12m 45.36s / day
Inclination9.6002°
Longitude of ascending node111.14°
323.52°
Physical characteristics
Dimensions30.57±2.1 km (IRAS:3)[4]
32.80±0.69 km[5]
35.6±3.6 km[6]
35.943±0.183[7]
39.942±0.390 km[8]
40±4 km[9]
Rotation period12 h (dated)[10]
20.4±0.1 h[11]
20.456±0.004 h[12]
Geometric albedo0.04±0.01[9]
0.0425±0.0069[8]
0.045±0.010[7]
0.05±0.01[6]
0.065±0.003[5]
0.0726±0.011 (IRAS:3)[4]
XFU (Tholen)[1]
B (SMASS)[1] · B[3]
B–V = 0.642[1]
U–B = 0.262[1]
Absolute magnitude (H)11.04[1][3][4][5][6][8][9]


1655 Comas Solà, provisional designation 1929 WG, is a rare-type asteroid from the central region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 28 November 1929, by Spanish astronomer of Catalan origin, Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain.[13] It was later named after the discoverer.[2]

Orbit and classification

It orbits the Sun in the central main-belt at a distance of 2.1–3.4 AU once every 4 years and 8 months (1,693 days). Its orbit has an eccentricity of 0.24 and an inclination of 10° with respect to the ecliptic.[1] It was first observed as A901 VG at Heidelberg Observatory in 1901, extending the body's observation arc by 28 years prior to its official discovery observation at Barcelona.[13]

Physical characteristics

Comas Solà shows as rare XFU-type and B-type spectrum in the Tholen and SMASS classification scheme, respectively.[1]

Lightcurves

A rotational lightcurve obtained by American amateur astronomer Robert Stephens gave a well-defined rotation period of 20.456 hours with a brightness variation of 0.20 magnitude ({{{1}}}).[3][12]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Comas Solà measures between 30.57 and 40 kilometers in diameter and its surface has an albedo between 0.04 and 0.073.[4][5][8][9] More recently published revised WISE/NEOWISE-data gave a refined diameter of 35.6 and 35.94 kilometers, respectively.[6][7] The Collaborative Asteroid Lightcurve Link agrees with IRAS, and adopts an albedo of 0.0726 with a diameter of 30.57 kilometers and an absolute magnitude of 11.04.[3]

Naming

This minor planet was named in memory of its discoverer Josep Comas i Solà (1868–1937), first director of the discovering Fabra Observatory, Barcelona, capital of the Catalonia region in northeastern Spain. He was a prolific observer of minor planets and comets in the 1920s.[2]

It is one of the rare cases where a minor planet bears the name of its discoverer. Solà is also honored by the asteroid 1102 Pepita, named after his nickname, and by the 127-kilometer wide Martian crater Comas Sola.[2] The official naming citation was published by the Minor Planet Center on 1 June 1980 (M.P.C. 5357).[2][14]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "JPL Small-Body Database Browser: 1655 Comas Sola (1929 WG)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001655. Retrieved 6 June 2017. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Schmadel, Lutz D. (2007). "(1655) Comas Solá". Dictionary of Minor Planet Names – (1655) Comas Solá. Springer Berlin Heidelberg. pp. 131–132. doi:10.1007/978-3-540-29925-7_1656. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 "LCDB Data for (1655) Comas Solà". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1655%7CComas%20Solà. Retrieved 25 December 2016. 
  4. ↑ 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. ↑ 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. ↑ 6.0 6.1 6.2 6.3 Alí-Lagoa, V.; Licandro, J.; Gil-Hutton, R.; Cañada-Assandri, M.; Delbo', M.; de León, J. et al. (June 2016). "Differences between the Pallas collisional family and similarly sized B-type asteroids". Astronomy and Astrophysics 591: 11. doi:10.1051/0004-6361/201527660. Bibcode: 2016A&A...591A..14A. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...591A..14A. Retrieved 25 December 2016. 
  7. ↑ 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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 25 December 2016. 
  8. ↑ 8.0 8.1 8.2 8.3 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. 
  9. ↑ 9.0 9.1 9.2 9.3 Alí-Lagoa, V.; de León, J.; Licandro, J.; Delbó, M.; Campins, H.; Pinilla-Alonso, N. et al. (June 2013). "Physical properties of B-type asteroids from WISE data". Astronomy and Astrophysics 554: 16. doi:10.1051/0004-6361/201220680. Bibcode: 2013A&A...554A..71A. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...554A..71A. Retrieved 25 December 2016. 
  10. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (1655) Comas Solà". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001655. Retrieved 25 December 2016. 
  11. ↑ Addleman, Don; Covele, Brent; Duncan, Allison; Johnson, Jama; Kramb, Steve; Lecrone, Crystal et al. (December 2005). "Rose-Hulman spring 2005 lightcurve results: 155 Scylla, 590 Tomyris, 1655 Comas Solá, 2058 Roka, 6379 Vrba, and (25934) 2001 DC74.". The Minor Planet Bulletin 32 (4): 76–78. ISSN 1052-8091. Bibcode: 2005MPBu...32...76A. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005MPBu...32...76A. Retrieved 25 December 2016. 
  12. ↑ 12.0 12.1 Stephens, Robert D. (July 2009). "Asteroids Observed from GMARS and Santana Observatories: 2009 January - February". The Minor Planet Bulletin 36 (3): 125–126. ISSN 1052-8091. Bibcode: 2009MPBu...36..125S. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36..125S. Retrieved 25 December 2016. 
  13. ↑ 13.0 13.1 "1655 Comas Sola (1929 WG)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1655. Retrieved 25 December 2016. 
  14. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 25 December 2016. 

External links



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