1736 Floirac

1736 Floirac
Discovery
Discovered byG. Soulié
Discovery siteBordeaux Obs.
Discovery date6 September 1967
Designations
Named after
Floirac, Gironde
(location of observatory)
1967 RA · 1927 RB
1927 SN · 1934 XC
1937 RP · 1952 DO1
1957 TC · 1957 US
1962 CN · A914 WD
main-belt · Flora
Orbital characteristics
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc89.65 yr (32,745 days)
Aphelion2.6074 AU
Perihelion1.8500 AU
2.2287 AU
Eccentricity0.1699
3.33 yr (1,215 days)
331.80°
Inclination4.5502°
159.80°
248.92°
Physical characteristics
Dimensions8.617±0.075
8.701±0.119 km
8.729 km
8.73 km (taken)
9.50±0.30 km
10.08±0.34 km
6.775±0.001 h
12.28±0.06 h
0.252±0.020
0.258±0.060
0.2711
0.2994±0.0420
0.302±0.021
S
11.84±0.07 (R) · 12.20 · 12.24 · 12.33±0.086 · 12.4 · 12.44±0.33

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.

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.

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.

Physical characteristics

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

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 (U=3). An alternative period solution of 12.28 hours (Δmag 0.25) was found by French amateur astronomer Laurent Bernasconi in June 2006 (U=2).

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.

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.

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. The official naming citation was published by the Minor Planet Center on 15 July 1968 (M.P.C. 2883).

Notes

  1. 1 2 3 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. 1 2 Lightcurve plot of 1736 Floirac by Higgins and Pravec, from Ondrejov data obtained by the NEO Photometric Program and collaborating projects

References

  1. 1 2 3 4 "JPL Small-Body Database Browser: 1736 Floirac (1967 RA)" (2017-04-26 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017.
  2. 1 2 3 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. 1 2 3 4 5 "MinorPlanet.info: One Asteroid Information". Asteroid Lightcurve Database (LCDB). Search using Number = "1736"
  4. 1 2 3 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 21 December 2016.
  5. 1 2 3 4 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.
  6. 1 2 3 4 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. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. hdl:11104/0217021. Retrieved 21 December 2016.
  7. 1 2 3 4 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 21 December 2016.
  8. 1 2 3 4 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)
  9. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1736) Floirac". Geneva Observatory. Retrieved 21 December 2016. [dead link]
  10. 1 2 3 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. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 21 December 2016.
  11. 1 2 "1736 Floirac (1967 RA)". Minor Planet Center. 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.