6395 Hilliard

Last updated

6395 Hilliard
Discovery  [1]
Discovered by Y. Kushida
O. Muramatsu
Discovery site Yatsugatake Obs.
Discovery date21 October 1990
Designations
(6395) Hilliard
Named after
Elizabeth and Leslie Hilliard
(Herschel Museum of Astronomy) [2]
1990 UE1 ·1975 VU8
1986 QX5
main-belt  · Nysa   [3]
Orbital characteristics   [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 67.17 yr (24,534 days)
Aphelion 2.8975 AU
Perihelion 1.9287 AU
2.4131 AU
Eccentricity 0.2007
3.75 yr (1,369 days)
50.639°
0° 15m 46.44s / day
Inclination 1.4970°
227.68°
179.25°
Physical characteristics
Dimensions4.082±0.080 km [4] [5]
4.71 km (calculated) [3]
0.20 (assumed) [3]
0.351±0.018 [4] [5]
S   [3] [6]
13.7 [4]  ·14.0 [1] [3]  ·14.03±0.25 [6]

    6395 Hilliard, provisional designation 1990 UE1, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 4.5 kilometers in diameter.

    Contents

    It was discovered on 21 October 1990, by Japanese astronomers Yoshio Kushida and Osamu Muramatsu at Yatsugatake South Base Observatory, Japan. [7] The asteroid was later named after the British philanthropic couple Elizabeth and Leslie Hilliard, donors of the Herschel Museum of Astronomy. [2]

    Orbit and classification

    Hilliard is a stony member of the Nysa family, a relatively small family named after its namesake 44 Nysa. It orbits the Sun in the inner main-belt at a distance of 1.9–2.9  AU once every 3 years and 9 months (1,369 days). Its orbit has an eccentricity of 0.20 and an inclination of 1° with respect to the ecliptic. [1]

    The asteroid was first found on a precovery image taken at Palomar Observatory in 1949. Its first used observations was taken at Crimea-Nauchnij in 1975, when it was identified as 1975 VU8, extending the body's observation arc by 15 years prior to its official discovery observation at Yatsugatake. [7]

    Physical characteristics

    Pan-STARRS ' photometric survey has characterized Hilliard as a common stony S-type asteroid. [6]

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hilliard measures 4.082 kilometers in diameter and its surface has a high albedo of 0.351, [4] [5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a large diameter of 4.71 kilometers with on an absolute magnitude of 14.0, as diameter and albedo (reflectivity) are inversely related to each other. [3]

    Lightcurve

    No rotational lightcurve of Hilliard has been obtained from photometric observations. In 2006, observations at the RHIT in Terre Haute, Indiana, United States, rendered no observable brightness variation. [8] As of 2017, the body's rotation period and shape remain unknown. [3]

    Naming

    This minor planet was named in honor of Elizabeth (1903–2001) and Leslie Hilliard (1905–1997), donors of the Herschel Museum of Astronomy in Bath, England. The museum was formerly the home of astronomer William Herschel, from the garden of which he discovered the planet Uranus in 1781. [2] [9] The official naming citation was published on 9 September 1995 ( M.P.C. 25655 ). [10]

    Related Research Articles

    <span class="mw-page-title-main">7166 Kennedy</span> Stony Nysian asteroid

    7166 Kennedy, provisional designation 1985 TR, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 15 October 1985, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States. The asteroid was named after Malcolm Kennedy of the Astronomical Society of Glasgow.

    6433 Enya, provisional designation 1978 WC, is a stony background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 18 November 1978, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. It was named for Irish musician Enya.

    2751 Campbell, provisional designation 1962 RP, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.

    4797 Ako, provisional designation 1989 SJ, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 30 September 1989, by the Japanese astronomers Toshiro Nomura and Kōyō Kawanishi at the Minami-Oda Observatory, Japan. The asteroid was named for the Japanese city of Akō.

    2033 Basilea, provisional designation 1973 CA, is a stony asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 6 February 1973, by astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. The asteroid was named for the Swiss city of Basel.

    2939 Coconino, provisional designation 1982 DP, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 21 February 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, United States. It is named after the Coconino County in Arizona.

    1991 Darwin, provisional designation 1967 JL, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter.

    <span class="mw-page-title-main">1555 Dejan</span> Asteroid from the background population of the central regions of the asteroid belt

    1555 Dejan, provisional designation 1941 SA, is an asteroid from the background population of the central regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 15 September 1941, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle. The asteroid was named after Dejan Đurković, son of Serbian astronomer Petar Đurković.

    2571 Geisei, provisional designation 1981 UC, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by Japanese astronomer Tsutomu Seki at Geisei Observatory on 23 October 1981, and named for the Japanese village of Geisei.

    1710 Gothard, provisional designation 1941 UF, is a stony asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 20 October 1941, by Hungarian astronomer György Kulin at the Konkoly Observatory in Budapest, Hungary. It was later named after Hungarian amateur astronomer Jenő Gothard.

    23718 Horgos (provisional designation 1998 GO10) is a stony background asteroid from the central regions of the asteroid belt, approximately 2.9 kilometers in diameter. It was discovered on 2 April 1998, by Hungarian astronomers Krisztián Sárneczky and László Kiss at Konkoly's Piszkéstető Station northeast of Budapest, Hungary. The asteroid was named after the Serbian town of Horgoš.

    21795 Masi (provisional designation 1999 SN9) is a Nysian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers (2 miles) in diameter. It was discovered on 29 September 1999, by Italian amateur astronomer Franco Mallia at the Campo Catino Astronomical Observatory in Lazio, Italy. The likely S-type asteroid has a rotation period of 13.86 hours. It was named for Italian astronomer Gianluca Masi.

    1455 Mitchella, provisional designation 1937 LF, is a Florian asteroid, slow rotator and suspected tumbler from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 5 June 1937, by astronomer Alfred Bohrmann at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after American astronomer Maria Mitchell.

    15350 Naganuma, provisional designation 1994 VB2, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4.3 kilometers (2.7 miles) in diameter. It was discovered on 3 November 1994, by Japanese astronomers Yoshio Kushida and Osamu Muramatsu at the Yatsugatake South Base Observatory. The likely S-type asteroid has a rotation period of 2.5 hours. It was named for the town of Naganuma in northern Japan.

    1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named after composer Jean Sibelius.

    7866 Sicoli, provisional designation 1982 TK, is a stony Nysa asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 13 October 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona. The asteroid was named after Italian astronomer Piero Sicoli.

    4789 Sprattia, provisional designation 1987 UU2, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 20 October 1987, by Canadian astronomer David Balam at the Climenhaga Observatory (657) in Victoria, Canada. The S-type asteroid has a rotation period of 3.1 hours and was named after Canadian amateur astronomer Christopher E. Spratt.

    4760 Jia-xiang, provisional designation 1981 GN1, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 1 April 1981, by astronomers at Harvard University's Oak Ridge Observatory in Massachusetts, United States. The presumed stony S-type asteroid was named after Chinese astronomer Zhang Jiaxiang. It has a rotation period of 14.96 hours.

    2011 Veteraniya, provisional designation 1970 QB1, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 30 August 1970, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula, and named for the Soviet veterans of the Second World War.

    31179 Gongju (provisional designation 1997 YR2) is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 21 December 1997, by Japanese amateur astronomer Naoto Sato at his Chichibu Observatory near Tokyo, central Japan. The S-type asteroid has a rotation period of 4.8 hours and possibly an elongated shape. It was named for the South Korean city of Gongju.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 6395 Hilliard (1990 UE1)" (2017-01-26 last obs.). Jet Propulsion Laboratory . Retrieved 4 July 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(6395) Hilliard". Dictionary of Minor Planet Names – (6395) Hilliard. Springer Berlin Heidelberg. p. 529. doi:10.1007/978-3-540-29925-7_5839. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 "LCDB Data for (6395) Hilliard". Asteroid Lightcurve Database (LCDB). Retrieved 29 April 2017.
    4. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    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 29 April 2017.
    6. 1 2 3 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007 . Retrieved 29 April 2017.
    7. 1 2 "6395 Hilliard (1990 UE1)". Minor Planet Center. Retrieved 29 April 2017.
    8. ↑ Lecrone, Crystal; Duncan, Allison; Hudson, Erin; Johnson, Jama; Mulvihill, Alex; Reichert, Chris; et al. (September 2006). "2005-2006 fall observing campaign at Rose-Hulman Institute of Technology". The Minor Planet Bulletin. 33 (3): 66–67. Bibcode:2006MPBu...33...66L. ISSN   1052-8091 . Retrieved 29 April 2017.
    9. ↑ "Elizabeth Hilliard – Obiturary". The Independent. 13 June 2001. Retrieved 29 April 2017.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 April 2017.
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.