astro.wikisort.org - Asteroid

(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]

(7348) 1993 FJ₂₂

Discovery[1]
Discovered by	UESAC
Discovery site	La Silla Obs.
Discovery date	21 March 1993
Designations
MPC designation	(7348) 1993 FJ22
Alternative designations	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)
Aphelion	3.4232 AU
Perihelion	2.7623 AU
Semi-major axis	3.0927 AU
Eccentricity	0.1069
Orbital period (sidereal)	5.44 yr (1,987 days)
Mean anomaly	206.95°
Inclination	0.8715°
Longitude of ascending node	11.015°
Argument of perihelion	151.44°
Physical characteristics
Dimensions	9.91 km (calculated)[2]
Synodic rotation period	3.470±0.020 h[3] 3.4735±0.0031 h[4]
Geometric albedo	0.08 (assumed)[2]
Spectral type	C[2]
Absolute magnitude (H)	12.9[1] · 12.780±0.050[3] · 12.929±0.001[4] · 13.38[2]

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 (U=2/2).[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

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• 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
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• (7348) 1993 FJ22 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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