1655 Comas Solà

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1655 Comas Solà
Discovery [1]
Discovered byJ. Comas Solà
Discovery siteFabra Obs.
Discovery date28 November 1929
(1655) Comas Solá
Named after
Josep Comas i Solà
(discoverer himself)[2]
1929 WG · 1929 WC1
1958 BG · A901 VG
main-belt · (middle)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc114.97 yr (41,994 days)
Aphelion3.4357 AU
Perihelion2.1248 AU
2.7803 AU
4.64 yr (1,693 days)
0° 12m 45.36s / day
Physical characteristics
Dimensions30.57±2.1 km (IRAS:3)[4]
32.80±0.69 km[5]
35.6±3.6 km[6]
39.942±0.390 km[8]
40±4 km[9]
12 h (dated)[10]
20.4±0.1 h[11]
20.456±0.004 h[12]
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]

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[edit]

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[edit]

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


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 (U=3).[3][12]

Diameter and albedo[edit]

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]


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]


  1. ^ a b c d e f g h i "JPL Small-Body Database Browser: 1655 Comas Sola (1929 WG)" (2016-10-26 last obs.). Jet Propulsion Laboratory. Retrieved 6 June 2017.
  2. ^ a b c d e 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. ^ a b c d e "LCDB Data for (1655) Comas Solà". Asteroid Lightcurve Database (LCDB). Retrieved 25 December 2016.
  4. ^ 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.
  5. ^ 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)
  6. ^ a b c d 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. Bibcode:2016A&A...591A..14A. doi:10.1051/0004-6361/201527660. Retrieved 25 December 2016.
  7. ^ a b c 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. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 25 December 2016.
  8. ^ a b c d 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. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  9. ^ a b c d 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. arXiv:1303.5487. Bibcode:2013A&A...554A..71A. doi:10.1051/0004-6361/201220680. Retrieved 25 December 2016.
  10. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (1655) Comas Solà". Geneva Observatory. 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. Bibcode:2005MPBu...32...76A. ISSN 1052-8091. Retrieved 25 December 2016.
  12. ^ a b Stephens, Robert D. (July 2009). "Asteroids Observed from GMARS and Santana Observatories: 2009 January - February". The Minor Planet Bulletin. 36 (3): 125–126. Bibcode:2009MPBu...36..125S. ISSN 1052-8091. Retrieved 25 December 2016.
  13. ^ a b "1655 Comas Sola (1929 WG)". Minor Planet Center. Retrieved 25 December 2016.
  14. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 December 2016.

External links[edit]