Astronomy:(7348) 1993 FJ22
| Discovery[1] | |
|---|---|
| Discovered by | UESAC |
| Discovery site | La Silla Obs. |
| Discovery date | 21 March 1993 |
| Designations | |
| (7348) 1993 FJ22 | |
| 1993 FJ22 · 1933 FU 1978 NM5 · 1991 XF3 | |
| Minor planet category | main-belt · Themis[2] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.28 yr (30,783 days) |
| |{{{apsis}}}|helion}} | 3.4232 AU |
| |{{{apsis}}}|helion}} | 2.7623 AU |
| 3.0927 AU | |
| Eccentricity | 0.1069 |
| Orbital period | 5.44 yr (1,987 days) |
| Mean anomaly | 206.95° |
| Inclination | 0.8715° |
| Longitude of ascending node | 11.015° |
| 151.44° | |
| Physical characteristics | |
| Dimensions | 9.91 km (calculated)[2] |
| Rotation period | 3.470±0.020 h[3] 3.4735±0.0031 h[4] |
| Geometric albedo | 0.08 (assumed)[2] |
| C[2] | |
| Absolute magnitude (H) | 12.9[1] · 12.780±0.050[3] · 12.929±0.001[4] · 13.38[2] |
(7348) 1993 FJ22 is a 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]
Classification and orbit
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 in the outer main-belt at a distance of 2.8–3.4 AU once every 5 years and 5 months (1,987 days). Its orbit has an eccentricity of 0.11 and an inclination of 1° with respect to the ecliptic. It was first identified as 1933 FU at Heidelberg in 1933, extending the body's observation arc by 60 years prior to its official discovery observation at La Silla.[1]
Physical characteristics
Lightcurves
In 2014, two rotational lightcurves of this asteroid were obtained from photometric observations in the R-band at the U.S. Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.4735 and 3.470 hours with a brightness variation of 0.10 and 0.13 in magnitude, respectively ({{{1}}}).[3][4]
Diameter and albedo
The Collaborative Asteroid Lightcurve Link (CALL) assumes a low albedo of 0.08 for the asteroid's surface and calculates a diameter of 9.9 kilometers, based on an absolute magnitude of 13.38.[2]
Naming
As of 2017, the asteroid has not been named.[5]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 7348 (1993 FJ22)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007348. Retrieved 5 September 2017.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "LCDB Data for (7348)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=7348%7C. Retrieved 22 August 2016.
- ↑ 3.0 3.1 3.2 Chang, Chan-Kao (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series 219 (2): 19. doi:10.1088/0067-0049/219/2/27. Bibcode: 2015ApJS..219...27C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJS..219...27C. Retrieved 22 August 2016.
- ↑ 4.0 4.1 4.2 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 22 August 2016.
- ↑ 5.0 5.1 "7348 (1993 FJ22)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=7348. Retrieved 22 August 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 AstDyS-2, Asteroids—Dynamic Site
- (7348) 1993 FJ22 at the JPL Small-Body Database
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