1746 Brouwer

1746 Brouwer
Discovery [1]
Discovered by Indiana Asteroid Program
Discovery site Goethe Link Obs.
Discovery date 14 September 1963
Designations
MPC designation 1746 Brouwer
Named after
 Dirk Brouwer
(astronomer) [2]
1963 RF · 1940 WE
1947 QA
main-belt (outer) · Hilda [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 75.30 yr (27503 days)
Aphelion 4.7656 AU (712.92 Gm)
Perihelion 3.1317 AU (468.50 Gm)
3.9486 AU (590.70 Gm)
Eccentricity 0.20690
7.85 yr (2866.0 d)
216.59°
0° 7m 32.196s / day
Inclination 8.3670°
321.99°
47.551°
Earth MOID 2.13717 AU (319.716 Gm)
Jupiter MOID 0.857162 AU (128.2296 Gm)
Jupiter Tisserand parameter 3.004
Physical characteristics
Dimensions 64.25 km [4]
61.50±1.80 km [5]
Mean radius
 32.125 ± 2.45 km
19.8 h (0.83 d) [1][6]
19.88±0.05 h [lower-alpha 1]
0.0448 [4]
0.051±0.003 [5]
0.05±0.01 [7]
0.0448 ± 0.008 [1]
B–V = 0.721
U–B = 0.227
Tholen = D
D [3]
9.95

    1746 Brouwer, provisional designation 1963 RF, is a dark, reddish Hildian asteroid from the outermost region of the asteroid belt, about 64 kilometers in diameter. It was discovered on September 14, 1963 by the Indiana Asteroid Program at the U.S. Goethe Link Observatory near Brooklyn, Indiana.[8]

    The asteroid is a member of the Hilda family, a large group that orbits in resonance with the gas giant Jupiter and are thought to originate from the Kuiper belt. The body orbits the Sun at a distance of 3.1–4.8 AU once every 7 years and 10 months (2,867 days). Its orbit shows an eccentricity of 0.21 and is tilted by 8 degrees to the plane of the ecliptic. It has a rotation period of 19.8 hours.[6][lower-alpha 1] The reddish D-type asteroid has a low albedo of 0.05, based on observations made by the space-based IRAS, Akari and WISE/NEOWISE missions.[4][5][7]

    It was named in honor of Dutch–American astronomer Dirk Brouwer (1902–1966). Originally at Leiden University and specialized in celestial mechanics, he became director of the Yale University Observatory and was the president of IAU's commission 20, Positions & Motions of Minor Planets, Comets & Satellites, from 1948 to 1955.[2]

    References

    1. 1 2 Slyusarev (2012) web: rotation period 19.88±0.05 hours with a brightness amplitude of 0.21. Summary figures at Asteroid Lightcurve Database for (1746) Brouwer
    1. 1 2 3 4 "JPL Small-Body Database Browser: 1746 Brouwer (1963 RF)" (2015-08-10 last obs.). Jet Propulsion Laboratory. Retrieved 21 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1746) Brouwer. Springer Berlin Heidelberg. p. 139. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 "LCDB Data for (1746) Brouwer". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved November 2015.
    5. 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
    6. 1 2 Dahlgren, M.; Lahulla, J. F.; Lagerkvist, C.-I.; Lagerros, J.; Mottola, S.; Erikson, A.; et al. (June 1998). "A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids". Icarus 133 (2): 247–285. Bibcode:1998Icar..133..247D. doi:10.1006/icar.1998.5919. Retrieved November 2015.
    7. 1 2 Grav, T.; Mainzer, A. K.; Bauer, J.; Masiero, J.; Spahr, T.; McMillan, R. S.; et al. (January 2012). "WISE/NEOWISE Observations of the Hilda Population: Preliminary Results". The Astrophysical Journal 744 (2): 15. arXiv:1110.0283. Bibcode:2012ApJ...744..197G. doi:10.1088/0004-637X/744/2/197. Retrieved November 2015.
    8. ↑ "1746 Brouwer (1963 RF)". Minor Planet Center. Retrieved November 2015.

    External links


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