1626 Sadeya

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1626 Sadeya
Discovery [1]
Discovered by J. Comas Solà
Discovery site Fabra Obs.
Discovery date 10 January 1927
Designations
MPC designation (1626) Sadeya
1927 AA · 1956 AA
main-belt · Phocaea[2]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 89.66 yr (32,750 days)
Aphelion 3.0122 AU
Perihelion 1.7161 AU
2.3641 AU
Eccentricity 0.2741
3.64 yr (1,328 days)
316.94°
0° 16m 15.96s / day
Inclination 25.286°
279.54°
148.79°
Physical characteristics
Dimensions 14.25±2.36 km[3]
14.77±0.19 km[4]
15.140±0.490 km[5]
15.95 km (calculated)[2]
3.414±0.005 h[6]
3.418±0.001[7]
3.419±0.001 h[7]
3.420±0.001 h[8][9]
3.4200±0.0006 h[10]
3.42048±0.00005 h[9]
3.438±0.009 h[11]
0.23 (assumed)[2]
0.30±0.16[3]
0.486±0.067[5]
0.512±0.016[4]
S[2]
10.50[4][5] · 11.10[3] · 11.2[1][2]

1626 Sadeya, provisional designation 1927 AA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 15 kilometers in diameter.

It was discovered on 10 January 1927, by Catalan astronomer Josep Comas i Solà at Fabra Observatory in Barcelona, Spain, and named after the Spanish and American Astronomical Society.[12][13]

Orbit and classification[edit]

The stony S-type asteroid is a member of the Phocaea family, a smaller group of asteroids in the inner main-belt with rather high inclinations between 18° and 32°. It orbits the Sun at a distance of 1.7–3.0 AU once every 3 years and 8 months (1,328 days). Its orbit has an eccentricity of 0.27 and an inclination of 25° with respect to the ecliptic.[1] Sadeya's observation arc begins 2 months after its official discovery with a precovery taken at Yerkes Observatory.[13]

Physical characteristics[edit]

Rotation period[edit]

Sadeya has a well-defined rotation period between 3.414 and 3.438 hours with a change in brightness between 0.07 and 0.22 in magnitude (U=2+/3-/3). These numerous rotational light-curves were obtained by ESO astronomers, Julian Oey, Pierre Antonini, Ramon Naves, Enric Forné, Hilari Pallares, Brian Warner and Vladimir Benishek between 1996 and 2014.[7][8][9][10][11]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Sadeya measures between 14.25 and 15.14 kilometers in diameter, and its surface has an albedo between 0.30 and 0.512.[3][4][5] The Collaborative Asteroid Lightcurve Link assumes a lower albedo of 0.23 – derived from 25 Phocaea, the namesake of the Phocaea family – and calculates a diameter of 15.95 kilometers, based on an absolute magnitude of 11.2.[2]

Naming[edit]

This minor planet was named after the Spanish and American Astronomical Society (Spanish: Sociedad Astrónomica de España y América), also known by its acronym "Sadeya". It was founded by Comas i Solà, who also was its first president.[12] Naming citation was published before November 1977 (M.P.C. 2277).[14]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1626 Sadeya (1927 AA)" (2016-11-04 last obs.). Jet Propulsion Laboratory. Retrieved 28 December 2016. 
  2. ^ a b c d e f "LCDB Data for (1626) Sadeya". Asteroid Lightcurve Database (LCDB). Retrieved 28 December 2016. 
  3. ^ 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:1509.02522Freely accessible. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 28 December 2016. 
  4. ^ 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" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 28 December 2016. 
  5. ^ 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 28 December 2016. 
  6. ^ Warner, Brian D. (April 2010). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 September-December". The Minor Planet Bulletin. 37 (2): 57–64. Bibcode:2010MPBu...37...57W. ISSN 1052-8091. Retrieved 28 December 2016. 
  7. ^ a b c Benishek, Vladimir (January 2015). "Rotation Period Determinations for 1095 Tulipa, 1626 Sadeya 2132 Zhukov, and 7173 Sepkoski". The Minor Planet Bulletin. 42 (1): 75–76. Bibcode:2015MPBu...42...75B. ISSN 1052-8091. Retrieved 28 December 2016. 
  8. ^ a b Warner, Brian D. (July 2014). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January-March". The Minor Planet Bulletin. 41 (3): 144–155. Bibcode:2014MPBu...41..144W. ISSN 1052-8091. Retrieved 28 December 2016. 
  9. ^ a b c Behrend, Raoul. "Asteroids and comets rotation curves – (1626) Sadeya". Geneva Observatory. Retrieved 28 December 2016. 
  10. ^ a b Oey, Julian; Krajewski, Ric (June 2008). "Lightcurve Analysis of Asteroids from Kingsgrove and Other Collaborating Observatories in the First Half of 2007". The Minor Planet Bulletin. 35 (2): 47–48. Bibcode:2008MPBu...35...47O. ISSN 1052-8091. Retrieved 28 December 2016. 
  11. ^ a b Florczak, M.; Dotto, E.; Barucci, M. A.; Birlan, M.; Erikson, A.; Fulchignoni, M.; et al. (November 1997). "Rotational properties of main belt asteroids: photoelectric and CCD observations of 15 objects". Planetary and Space Science. 45 (11): 1423–1435. Bibcode:1997P&SS...45.1423F. doi:10.1016/S0032-0633(97)00121-9. Retrieved 28 December 2016. 
  12. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1626) Sadeya. Springer Berlin Heidelberg. p. 129. ISBN 978-3-540-00238-3. Retrieved 28 December 2016. 
  13. ^ a b "1626 Sadeya (1927 AA)". Minor Planet Center. Retrieved 28 December 2016. 
  14. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 December 2016. 

External links[edit]