astro.wikisort.org - Asteroid

3169 Ostro, provisional designation 1981 LA, is a Hungaria family asteroid from the innermost regions of the asteroid belt, approximately 5 kilometers in diameter.

3169 Ostro

Ostro imaged by the 0.7-m telescope at Heidelberg Observatory
Discovery [1]
Discovered by	E. Bowell
Discovery site	Anderson Mesa Stn.
Discovery date	4 June 1981
Designations
MPC designation	(3169) Ostro
Named after	Steven J. Ostro (planetary scientist)[2]
Alternative designations	1981 LA
Minor planet category	main-belt · (inner) [1] · Hungaria [3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	63.43 yr (23,166 days)
Aphelion	2.0184 AU
Perihelion	1.7652 AU
Semi-major axis	1.8918 AU
Eccentricity	0.0669
Orbital period (sidereal)	2.60 yr (950 days)
Mean anomaly	120.41°
Mean motion	0° 22m 43.68s / day
Inclination	24.906°
Longitude of ascending node	96.376°
Argument of perihelion	32.622°
Physical characteristics
Dimensions	4.662±0.118[5] 5.27 km (derived)[4]
Synodic rotation period	6.503±0.003[6]
Geometric albedo	0.5152 (derived)[4] 0.960±0.023[5]
Spectral type	TS (Tholen)[1] Xe (SMASS)[1] B–V = 0.771[1] U–B = 0.306[1]
Absolute magnitude (H)	12.73[1][4]

The asteroid was discovered on 4 June 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona,[3] and named after planetary scientist Steven J. Ostro at JPL.[2]

Orbit and classification

Ostro is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.8–2.0 AU once every 2 years and 7 months (950 days). Its orbit has an eccentricity of 0.07 and an inclination of 25° with respect to the ecliptic.[1]

Physical characteristics

In the Tholen and SMASS taxonomy, Ostro is classified as a TS-type and Xe-type asteroid, respectively.[1] It has also been characterized as an E-type asteroid.[4]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Ostro measures 4.662 kilometers in diameter and its surface has an outstandingly high albedo of 0.960.[5] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.5152 and a diameter of 5.27 kilometers with an absolute magnitude of 12.73.[4]

In May 2012, a rotational lightcurve of Ostro was obtained from photometric observations by American astronomer Brian Warner. Lightcurve analysis gave a well-defined rotation period of 6.503 hours with a brightness amplitude of 0.79 magnitude (U=3).[6]

Naming

This minor planet was named after American planetary scientist Steven J. Ostro at the Jet Propulsion Laboratory of the California Institute of Technology.[2] The approved naming citation was published by the Minor Planet Center on 14 April 1987 (M.P.C. 11749).[7]

References

External links

• Lightcurve plot of 3169 Ostro, Palmer Divide Observatory, B. D. Warner (2012)
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 3169 Ostro at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3169 Ostro at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (3169) Ostro

Vorlage:Infobox Asteroid/Wartung/MiAnomalieVorlage:Infobox Asteroid/Wartung/MiBewegung

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- [en] 3169 Ostro

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