(7348) 1993 FJ22
| Discovery [1] | |
|---|---|
| Discovered by | UESAC |
| Discovery site | ESO–La Silla Obs. |
| Discovery date | 21 March 1993 |
| Designations | |
| MPC designation | (7348) 1993 FJ22 |
|
1993 FJ22 · 1933 FU 1978 NM5 · 1991 XF3 | |
| main-belt · Themis [2] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.39 yr (30,094 days) |
| Aphelion | 3.4227 AU |
| Perihelion | 2.7595 AU |
| 3.0911 AU | |
| Eccentricity | 0.1072 |
| 5.43 yr (1,985 days) | |
| 98.375° | |
| Inclination | 0.8718° |
| 10.997° | |
| 151.27° | |
| Physical characteristics | |
| Dimensions | 9.91 km (calculated)[2] |
|
3.4735±0.0031 h[3] 3.470±0.020 h[4] | |
| 0.08 (assumed)[2] | |
| C [2] | |
|
12.9[1] 12.780±0.050[4] 12.929±0.001[3] 13.38[2] | |
|
| |
(7348) 1993 FJ22 is an unnamed, carbonaceous, Themistian asteroid from the outer region of the asteroid belt, about 10 kilometers in diameter. It was discovered on 21 March 1993, by the Uppsala-ESO Survey of Asteroids and Comets (UESAC) at ESO's La Silla Observatory site in northern Chile.[5]
The dark C-type asteroid is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits.[2] It orbits the Sun at a distance of 2.8–3.4 AU once every 5 years and 5 months (1,985 days). Its orbit has an eccentricity of 0.11 and an inclination of 1° with respect to the ecliptic. The asteroid's long observation arc of more than 80 years is due to precovery observations that date back to 1933, for which the body was assigned the provisional designation "1933 FU".[1]
In 2014, two photometric light-curve observations at the U.S. Palomar Transient Factory, California, rendered a rotation period of 3.4735±0.0031 and 3.470±0.020 hours with a brightness amplitude of 0.10 and 0.13 in magnitude, respectively (U=2).[3][4]
The Collaborative Asteroid Lightcurve Link (CALL) assumes that the asteroid's surface has a low albedo of 0.08 and calculates its diameter to measure 9.9 kilometers, based on an absolute magnitude of 13.38.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 7348 (1993 FJ22)" (2015-08-14 last obs.). Jet Propulsion Laboratory. Retrieved March 2016.
- 1 2 3 4 5 6 7 "LCDB Data for (7348)". Asteroid Lightcurve Database (LCDB). Retrieved March 2016.
- 1 2 3 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. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved March 2016.
- 1 2 3 Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series 219 (2): 19. arXiv:1506.08493. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved March 2016.
- ↑ "7348 (1993 FJ22)". Minor Planet Center. Retrieved March 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- (7348) 1993 FJ22 at the JPL Small-Body Database
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