Astronomy:1736 Floirac

From HandWiki
1736 Floirac
Discovery[1]
Discovered byG. Soulié
Discovery siteBordeaux Obs.
Discovery date6 September 1967
Designations
(1736) Floirac
Named afterFloirac, Gironde
(location of observatory)[2]
1967 RA · 1927 RB
1927 SN · 1934 XC
1937 RP · 1952 DO1
1957 TC · 1957 US
1962 CN · A914 WD
Minor planet categorymain-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc89.65 yr (32,745 days)
|{{{apsis}}}|helion}}2.6074 AU
|{{{apsis}}}|helion}}1.8500 AU
2.2287 AU
Eccentricity0.1699
Orbital period3.33 yr (1,215 days)
Mean anomaly331.80°
Inclination4.5502°
Longitude of ascending node159.80°
248.92°
Physical characteristics
Dimensions8.617±0.075[4]
8.701±0.119 km[5]
8.729 km[6]
8.73 km (taken)[3]
9.50±0.30 km[7]
10.08±0.34 km[8]
Rotation period6.775±0.001 h[lower-alpha 1][lower-alpha 2]
12.28±0.06 h[9]
Geometric albedo0.252±0.020[8]
0.258±0.060[7]
0.2711[6]
0.2994±0.0420[5]
0.302±0.021[4]
S[3][10]
Absolute magnitude (H)11.84±0.07 (R)[lower-alpha 1] · 12.20[8][7] · 12.24[5] · 12.33±0.086[3][6] · 12.4[1] · 12.44±0.33[10]


1736 Floirac, provisional designation 1967 RA, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8.7 kilometer in diameter.

It was discovered on 6 September 1967, by French astronomer Guy Soulié at Bordeaux Observatory in southwestern France, who named it after the French town of Floirac.[2][11]

Classification and orbit

Floirac is a member of the Flora family. It orbits the Sun at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,215 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[1]

First observed as A914 WD at Simeiz Observatory in 1914, the body's observation arc begins with its 1927-identification as 1927 RB at Heidelberg Observatory, approximately 40 years prior to its official discovery observation at Bordeaux.[11]

Physical characteristics

This asteroid has been characterized as a stony S-type asteroid by PanSTARRS' photometric survey.[10]

Lightcurves

In October 2007, a rotational lightcurve of Floirac was obtained from photometric observations by astronomer Petr Pravec and collaborating colleges. Lightcurve analysis gave a rotation period of 6.775 hours with a low brightness variation of 0.08 magnitude ({{{1}}}).[lower-alpha 1][lower-alpha 2] An alternative period solution of 12.28 hours (Δmag 0.25) was found by French amateur astronomer Laurent Bernasconi in June 2006 ({{{1}}}).[9]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Floirac measures between 8.617 and 10.08 kilometers in diameter and its surface has an albedo of 0.252 and 0.302.[4][5][7][8]

The Collaborative Asteroid Lightcurve Link takes an albedo of 0.2711 and a diameter of 8.73 kilometers with an absolute magnitude of 12.4, based on Petr Pravec's revised WISE-data.[3][6]

Naming

This minor planet was named by the discoverer for Floirac, a French town in the Département Gironde, near Bordeaux, where the discovering observatory is located.[2] The official naming citation was published by the Minor Planet Center on 15 July 1968 (M.P.C. 2883).[12]

Notes

  1. ↑ 1.0 1.1 1.2 Pravec (2007) web: rotation period 6.775±0.001 hours with a brightness amplitude of 0.08 mag. Quality Code is 3. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1736) Floirac and Pravec, P.; Wolf, M.; Sarounova, L. (2007)
  2. ↑ 2.0 2.1 Lightcurve plot of 1736 Floirac by Higgins and Pravec, from Ondrejov data obtained by the NEO Photometric Program and collaborating projects

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1736 Floirac (1967 RA)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001736. Retrieved 7 June 2017. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1736) Floirac". Dictionary of Minor Planet Names – (1736) Floirac. Springer Berlin Heidelberg. p. 138. doi:10.1007/978-3-540-29925-7_1737. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 "LCDB Data for (1736) Floirac". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1736%7CFloirac. Retrieved 21 December 2016. 
  4. ↑ 4.0 4.1 4.2 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 21 December 2016. 
  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 Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus 221 (1): 365–387. doi:10.1016/j.icarus.2012.07.026. Bibcode: 2012Icar..221..365P. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P. Retrieved 21 December 2016. 
  7. ↑ 7.0 7.1 7.2 7.3 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 21 December 2016. 
  8. ↑ 8.0 8.1 8.2 8.3 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)
  9. ↑ 9.0 9.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1736) Floirac". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001736. Retrieved 21 December 2016. 
  10. ↑ 10.0 10.1 10.2 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 21 December 2016. 
  11. ↑ 11.0 11.1 "1736 Floirac (1967 RA)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1736. Retrieved 21 December 2016. 
  12. ↑ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7. https://archive.org/details/dictionaryminorp2008schm. 

External links



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:1736_Floirac&oldid=3355098"