1736 Floirac
Stony Florian asteroid From Wikipedia, the free encyclopedia
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.
| Discovery[1] | |
|---|---|
| Discovered by | G. Soulié |
| Discovery site | Bordeaux Obs. |
| Discovery date | 6 September 1967 |
| Designations | |
| (1736) Floirac | |
Named after | Floirac, 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 | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 89.65 yr (32,745 days) |
| Aphelion | 2.6074 AU |
| Perihelion | 1.8500 AU |
| 2.2287 AU | |
| Eccentricity | 0.1699 |
| 3.33 yr (1,215 days) | |
| 331.80° | |
| Inclination | 4.5502° |
| 159.80° | |
| 248.92° | |
| Physical characteristics | |
| Dimensions | 8.617±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] |
| 6.775±0.001 h[a][b] 12.28±0.06 h[9] | |
| 0.252±0.020[8] 0.258±0.060[7] 0.2711[6] 0.2994±0.0420[5] 0.302±0.021[4] | |
| S[3][10] | |
| 11.84±0.07 (R)[a] · 12.20[8][7] · 12.24[5] · 12.33±0.086[3][6] · 12.4[1] · 12.44±0.33[10] | |
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 (U=3).[a][b] An alternative period solution of 12.28 hours (Δmag 0.25) was found by French amateur astronomer Laurent Bernasconi in June 2006 (U=2).[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
- 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)
- Lightcurve plot of 1736 Floirac by Higgins and Pravec, from Ondrejov data obtained by the NEO Photometric Program and collaborating projects
References
External links
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