3169 Ostro

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3169 Ostro
Asteroid (3169) Ostro.gif
Ostro imaged by the 0.7-m telescope
at Heidelberg Observatory
Discovery  [1]
Discovered by E. Bowell
Discovery site Anderson Mesa Stn.
Discovery date4 June 1981
Designations
(3169) Ostro
Named after
 Steven J. Ostro
(planetary scientist) [2]
1981 LA
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
1.8918 AU
Eccentricity 0.0669
2.60 yr (950 days)
120.41°
0° 22m 43.68s / day
Inclination 24.906°
96.376°
32.622°
Physical characteristics
Dimensions4.662±0.118 [5]
5.27 km (derived) [4]
6.503±0.003 [6]
0.5152(derived) [4]
0.960±0.023 [5]
TS (Tholen) [1]
Xe (SMASS) [1]
B–V = 0.771 [1]
U–B = 0.306 [1]
12.73 [1] [4]

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

    Contents

    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]

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    References

    1. 1 2 3 4 5 6 7 8 9 10 "JPL Small-Body Database Browser: 3169 Ostro (1981 LA)" (2017-06-04 last obs.). Jet Propulsion Laboratory. Archived from the original on 23 April 2017. Retrieved 15 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(3169) Ostro". Dictionary of Minor Planet Names – (3169) Ostro. Springer Berlin Heidelberg. p. 262. doi:10.1007/978-3-540-29925-7_3170. ISBN   978-3-540-00238-3.
    3. 1 2 "3169 Ostro (1981 LA)". Minor Planet Center. Retrieved 15 June 2017.
    4. 1 2 3 4 5 6 "LCDB Data for (3169) Ostro". Asteroid Lightcurve Database (LCDB). Retrieved 15 June 2017.
    5. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68 . Retrieved 15 June 2017.
    6. 1 2 Warner, Brian D. (October 2012). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2012 March - June". The Minor Planet Bulletin. 39 (4): 245–252. Bibcode:2012MPBu...39..245W. ISSN   1052-8091 . Retrieved 15 June 2017.
    7. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 15 June 2017.
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