21873 Jindřichůvhradec

Last updated • 2 min readFrom Wikipedia, The Free Encyclopedia

21873 Jindřichůvhradec
Discovery  [1]
Discovered by J. Tichá
M. Tichý
Discovery site Kleť Obs.
Discovery date29 October 1999
Designations
(21873) Jindřichůvhradec
Named after
 Jindřichův Hradec   [2]
(Czech town)
1999 UU3 ·1982 SN8
1988 XA5
main-belt  ·(outer)  [3]
Hygiea   [4]
Orbital characteristics   [5]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 34.52 yr (12,608 days)
Aphelion 3.8041 AU
Perihelion 2.4999 AU
3.1520 AU
Eccentricity 0.2069
5.60 yr (2,044 days)
89.398°
0° 10m 33.96s / day
Inclination 4.4633°
238.03°
130.91°
Physical characteristics
Dimensions7.183±0.136 km [6] [7]
10.44 km (calculated) [3]
50.5874±0.0664  h [8]
0.057 (assumed) [3]
0.237±0.088 [6] [7]
C (assumed) [3]  · X   [9]
12.9 [6]  ·12.90±0.17 [9]  ·13.1 [5]  ·13.184±0.005(R) [8]  ·13.63 [3]

    21873 Jindřichůvhradec (provisional designation 1999 UU3) is a dark Hygiean asteroid and relatively slower-than average rotator from the outer region of the asteroid belt, approximately 8 kilometers (5.0 miles) in diameter.

    Contents

    It was discovered by Czech astronomers Jana Tichá and Miloš Tichý at the South Bohemian Kleť Observatory on 29 October 1999, and named for the Czech town of Jindřichův Hradec. [1]

    Orbit

    The asteroid is a member of the Hygiea family ( 601 ), [4] a very large family of carbonaceous outer-belt asteroids, named after the fourth-largest asteroid, 10 Hygiea. [10] It orbits the Sun in the outer main-belt at a distance of 2.5–3.8  AU once every 5 years and 7 months (2,044 days). Its orbit has an eccentricity of 0.21 and an inclination of 4° with respect to the ecliptic. [5] The first precovery was obtained at Crimea–Nauchnij in 1982, extending the asteroid's observation arc by 17 years prior to its discovery. [1]

    Physical characteristics

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 7.2 kilometers in diameter and its surface has an albedo of 0.23. [6] Based on an absolute magnitude of 13.63, the Collaborative Asteroid Lightcurve Link calculates a diameter of 10.4 kilometers, assuming a standard albedo for carbonaceous C-type asteroids of 0.057, [3] which is in-line with the Hygiea family's overall spectral type. [10] : 23  A large-scale survey by Pan-STARRS, however, classifies the body as an X-type asteroid, which metallic core group has an intermediate albedo between stony and carbonaceous bodies. [9]

    In September 2010, a photometric lightcurve analysis at the U.S. Palomar Transient Factory, California, gave a long rotation period of 50.5874±0.0664 hours with a brightness variation of 0.61 in magnitude ( U=2 ). [8] This makes it a relatively slow rotator for an asteroid of its size, which normally have periods of just a few hours rather than several days.

    Naming

    This minor planet was named after Jindřichův Hradec, a south Bohemian town in the Czech Republic. Founded in the 13th century, it is known for its Renaissance château and Gothic church, which is exactly built on the 15th meridian east of Greenwich. A line marks the course of the meridian in its paving stones. [2] The approved naming citation was published by the Minor Planet Center on 28 January 2002 ( M.P.C. 44595). [11]

    Related Research Articles

    Athalia, provisional designation 1903 ME, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 20 September 1903, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The asteroid was named after the ancient Judahite queen Athaliah.

    997 Priska, provisional designation 1923 NR, is a carbonaceous Adeonian asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 12 July 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid's name is a common German female name, unrelated to the discoverer's contemporaries.

    <span class="mw-page-title-main">1073 Gellivara</span> Asteroid

    1073 Gellivara, provisional designation 1923 OW, is a dark Themistian asteroid, approximately 27 kilometers in diameter, located in the outer regions of the asteroid belt. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 14 September 1923, and later named after the Swedish town of Gällivare.

    1462 Zamenhof, provisional designation 1938 CA, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 6 February 1938, by Finnish astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Finland. The asteroid was named after L. L. Zamenhof, the creator of Esperanto. It is a recognized Zamenhof-Esperanto object.

    <span class="mw-page-title-main">1107 Lictoria</span>

    1107 Lictoria is a large Hygiea asteroid, approximately 79 kilometers in diameter, from the outer regions of the asteroid belt. It was discovered by Luigi Volta at the Pino Torinese Observatory in 1929, and named after the Fasces Lictores, Latin for "Fasci Littori", the symbol of the Italian fascist party.

    1109 Tata, provisional designation 1929 CU, is a dark Hygiean asteroid from the outer regions of the asteroid belt, approximately 69 kilometers in diameter. It was discovered on 5 February 1929, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany. The meaning of the asteroids's name is unknown.

    3563 Canterbury, provisional designation 1985 FE, is a dark Dorian asteroid from the middle regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 23 March 1985, by astronomer couple Alan Gilmore and Pamela Kilmartin at Mount John University Observatory near Lake Tekapo, New Zealand. The asteroid was named after New Zealand's Canterbury Province.

    <span class="mw-page-title-main">2708 Burns</span>

    2708 Burns is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 24 November 1981, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States. It was named after American planetary scientist Joseph A. Burns. The likely elongated B-type asteroid has a rotation period of 5.3 hours.

    1253 Frisia, provisional designation 1931 TV1, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1931, the asteroid was later named after the region of Frisia and the Frisian Islands.

    1184 Gaea, provisional designation 1926 RE, is an Aerian asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 September 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the goddess of Earth, Gaea (Gaia), from Greek mythology.

    1452 Hunnia, provisional designation 1938 DZ1, is a carbonaceous Meliboean asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 26 February 1938, by Hungarian astronomer György Kulin at the Konkoly Observatory in Budapest. The asteroid was named in honor of the Hungarian nation.

    1200 Imperatrix, provisional designation 1931 RH, is a carbonaceous Hygiean asteroid from the outer regions of the asteroid belt, approximately 40 kilometres (25 mi) in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory on 14 September 1931. The asteroid was named after the Latin word for empress.

    2324 Janice, provisional designation 1978 VS4, is a dark background asteroid from the outer regions of the asteroid belt, approximately 25 kilometers (16 miles) in diameter. It was discovered on 7 November 1978, by American astronomers Eleanor Helin and Schelte Bus at the Palomar Observatory in California. The asteroid was named for Janice Cline at Caltech. The presumably C-type asteroid has a rotation period of 23.2 hours.

    4944 Kozlovskij, provisional designation 1987 RP3, is a carbonaceous Witt asteroid from the central regions of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 2 September 1987, by Soviet astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean Peninsula. The asteroid was named for Russian opera singer Ivan Kozlovsky.

    1209 Pumma, provisional designation 1927 HA, is a Hygiean asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 22 April 1927, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was named after the niece of astronomer Albrecht Kahrstedt.

    4176 Sudek, provisional designation 1987 DS, is a Themistian asteroid from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 24 February 1987, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. The presumed C-type asteroid has a rotation period of 8.16 hours. It was named in memory of Czech photographer Josef Sudek.

    2169 Taiwan, provisional designation 1964 VP1, is a carbonaceous Astridian asteroid from the central regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 9 November 1964, by astronomers at the Purple Mountain Observatory near Nanking, China. It was named for Taiwan.

    1734 Zhongolovich, provisional designation 1928 TJ, is a carbonaceous Dorian asteroid from the central region of the asteroid belt, approximately 28 kilometers in diameter.

    10241 Miličević, provisional designation 1999 AU6, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 11 kilometers (6.8 miles) in diameter. It was discovered on 9 January 1999, by Croatian astronomer Korado Korlević at the Višnjan Observatory in Croatia. The C-type asteroid has a short rotation period of 3.87 hours and was named after hermit and amateur astronomer Don Nikola Miličević.

    23436 Alekfursenko (provisional designation 1982 UF8) is a carbonaceous Hygiean asteroid from the outer region of the asteroid belt, approximately 8.4 kilometers (5.2 miles) in diameter. It was discovered on 21 October 1982, by Russian–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula. The likely C-type asteroid has a rotation period of 3.6 hours. It was named after Russian historian Aleksandr Fursenko.

    References

    1. 1 2 3 "21873 Jindrichuvhradec (1999 UU3)". Minor Planet Center. Retrieved 3 April 2016.
    2. 1 2 Schmadel, Lutz D. (2007). "(21873) Jindřichůvhradec". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 868. doi:10.1007/978-3-540-29925-7_9693. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (21873) Jindrichuvhradec". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
    4. 1 2 "Asteroid 21873 Jindrichuvhradec – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
    5. 1 2 3 "JPL Small-Body Database Browser: 21873 Jindrichuvhradec (1999 UU3)" (2017-03-27 last obs.). Jet Propulsion Laboratory . Retrieved 5 July 2017.
    6. 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 . Retrieved 17 May 2016.
    7. 1 2 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 3 December 2016.
    8. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv: 1504.04041 . Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75 . Retrieved 17 May 2016.
    9. 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 17 May 2016.
    10. 1 2 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv: 1502.01628 . Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN   978-0-8165-3213-1.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.
    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.