Astronomy:1159 Granada

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1159 Granada
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date2 September 1929
Designations
(1159) Granada
Named afterGranada [2]
(Spanish city and province)
1929 RD · 1931 AR
1940 RS
Minor planet categorymain-belt · (inner)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc87.84 yr (32,083 days)
|{{{apsis}}}|helion}}2.5184 AU
|{{{apsis}}}|helion}}2.2409 AU
2.3797 AU
Eccentricity0.0583
Orbital period3.67 yr (1,341 days)
Mean anomaly35.176°
Mean motion0° 16m 6.6s / day
Inclination13.031°
Longitude of ascending node347.89°
313.33°
Physical characteristics
Dimensions27.839±0.283 km[4]
28.641±0.460 km[5]
29.94 km (derived)[3]
29.98±0.9 km[6]
30.14±9.34 km[7]
30.26±0.11 km[8]
30.26±0.29 km[9]
34.65±12.83 km[10]
Rotation period31 h[11]
72.852±0.2429 h[12]
Geometric albedo0.028±0.014[10]
0.031±0.002[4]
0.0379±0.0038[5]
0.04±0.00[8]
0.04±0.02[7]
0.0439 (derived)[3]
0.047±0.001[9]
0.0471±0.003[6]
S (assumed)[3]
B–V = 0.680[1]
U–B = 0.360[1]
Absolute magnitude (H)11.385±0.001 (R)[12] · 11.55[1][6][7][9] · 11.58[8] · 11.63[3][5][11] · 11.78±0.43[13] · 11.81[10]


1159 Granada, provisional designation 1929 RD, is a dark background asteroid and relatively slow rotator from the inner regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 2 September 1929, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany.[14] The asteroid was named for the Spanish city and province of Granada.[2]

Orbit and classification

Granada is a background asteroid that does not belong to any known asteroid family. It orbits the Sun in the inner main-belt at a distance of 2.2–2.5 AU once every 3 years and 8 months (1,341 days). Its orbit has an eccentricity of 0.06 and an inclination of 13° with respect to the ecliptic.[1] The body's observation arc begins nine days after its official discovery observation at Heidelberg.[14]

Physical characteristics

Although Granada is an assumed S-type asteroid,[3] it has a notably low albedo (see below) for an asteroid of the inner main-belt, even below that of most carbonaceous asteroids.

Slow rotation

In September 1984, a rotational lightcurve of Granada was obtained from photometric observations by astronomer Richard Binzel. Lightcurve analysis gave a rotation period of 31 hours with a brightness variation of 0.28 magnitude ({{{1}}}).[11] In October 2010, photometric observations in the R-band by astronomers at the Palomar Transient Factory gave a period of 72.852 hours and an amplitude of 0.24 ({{{1}}}).[12] While not being a slow rotator, Granada's period is significantly longer than the typical 2 to 20 hours measures for most asteroids.

Diameter and albedo

According to the 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, Granada measures between 27.839 and 34.65 kilometers in diameter and its surface has a low albedo between 0.028 and 0.0471.[4][5][6][7][8][9][10]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0439 and a diameter of 29.94 kilometers based on an absolute magnitude of 11.63.[3]

Naming

This minor planet was named after Granada, city and province in Andalusia in southern. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108).[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 1159 Granada (1929 RD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001159. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1159) Granada". Dictionary of Minor Planet Names – (1159) Granada. Springer Berlin Heidelberg. p. 98. doi:10.1007/978-3-540-29925-7_1160. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (1159) Granada". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1159%7CGranada. 
  4. ↑ 4.0 4.1 4.2 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 7 September 2017. 
  5. ↑ 5.0 5.1 5.2 5.3 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. 
  6. ↑ 6.0 6.1 6.2 6.3 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. 
  7. ↑ 7.0 7.1 7.2 7.3 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. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N. Retrieved 7 September 2017. 
  8. ↑ 8.0 8.1 8.2 8.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N. 
  9. ↑ 9.0 9.1 9.2 9.3 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)
  10. ↑ 10.0 10.1 10.2 10.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 7 September 2017. 
  11. ↑ 11.0 11.1 11.2 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus 72 (1): 135–208. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Bibcode: 1987Icar...72..135B. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B. Retrieved 7 September 2017. 
  12. ↑ 12.0 12.1 12.2 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 7 September 2017. 
  13. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 7 September 2017. 
  14. ↑ 14.0 14.1 "1159 Granada (1929 RD)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1159. 

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