(4000) Hipparchus ( English Hipparchus , 1989 AV ) is a dark asteroid in the central part of the asteroid belt , approximately 17 km in diameter. The asteroid was discovered on January 4, 1989 by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at the Kushiro Observatory in Hokkaido , Japan. [8] The asteroid probably belongs to class C and has a rotation period of 3.4 hours. [9] The facility was named after the Greek scientist Hipparchus . [10]
| (4000) Hipparchus | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Seiji Ueda, Hiroshi Kaneda |
| Place of discovery | Kushiro Observatory |
| Discovery date | |
| Orbital characteristics | |
| Age of April 27, 2019 ( JD 2458600.5) | |
| Eccentricity ( e ) | 0.1133 |
| Semimajor axis ( a ) | 2.5901 AU |
| Perihelion ( q ) | 2.2968 au |
| Aphelion ( Q ) | 2.8835 AU |
| Circulation Period ( P ) | 4.17 years |
| Inclination ( i ) | 2.7163 ° |
| Longitude node (Ω) | 318.53 ° |
| Perihelion Argument (ω) | 173.15 ° |
| Median Anomaly ( M ) | 78.842 ° |
| physical characteristics | |
| Diameter | 15.13 ± 4.81 km [2] 17.485 ± 0.032 km [3] [4] 18.217 ± 0.094 km [5] 18.87 ± 0.59 km [6] |
| Absolute magnitude | |
| Albedo | 0.0388 [5] 0,046 [6] 0.05 [2] 0,052 [3] [4] |
Content
- 1 Orbit and classification
- 2 Name
- 3 Physical characteristics
- 3.1 Period of rotation
- 3.2 Diameter and albedo
- 4 notes
- 5 Links
Orbit and classification
Hipparchus does not belong to any family of asteroids of the main belt. [11] The asteroid revolves around the Sun in the central part of the asteroid belt at a distance of 2.3-2.9 AU with a period of 4 years 2 months (1523 days, the major axis of the orbit is 2.59 AU). The eccentricity of the orbit is 0.11, the slope is 3 degrees relative to the plane of the ecliptic. [12] The observation arc of the object begins from the time before the discovery, the object was discovered in images of the sky from November 1954, taken at the Palomar Observatory, that is, 34 years before the official opening. [8]
Title
This small planet was named by the International Astronomical Union in honor of the Greek astronomer Hipparchus (190 - 120 BC), one of the greatest astronomers of the ancient world. Hipparchus introduced a systematic and critical approach to theoretical and observational astronomy. Also in honor of Hipparchus were named craters on the moon and Mars. [10] The official name was published by the Center for Minor Planets on November 21, 1991. [13] Other asteroids with multiples of 1000 are also named after prominent astronomers: [14]
- (1000) Piazzia is named after Giuseppe Piazzi , the discoverer of Ceres ,
- (2000) Herschel in honor of William Herschel , discoverer of Uranus,
- (3000) Leonardo in honor of Leonardo da Vinci .
The asteroid (4000) Hipparchus is followed by the asteroids (5000) IAU (in honor of the International Astronomical Union), (6000) United Nations (in honor of the United Nations ), (7000) Curie (in honor of Pierre Curie and Maria Curie ) and (8000) Isaac Newton , [14] a (9000) Hal (in honor of HAL 9000 from the 2001 Space Odyssey ) and (10000) Miriostos (in honor of the Greek word for 10000, and also in honor of all astronomers) were named according to direct associations.
Physical Characteristics
Based on a low albedo of about 0.04–0.05 (see below) , Hipparchus , in all likelihood, consists primarily of carbon rocks, not silicate; C-class asteroids are the most common in the asteroid belt among carbon asteroids.
Rotation Period
In February 2014, the light curve of the asteroid Hipparch was obtained from photometric observations made by astronomers of the Phillips Academy and HUT. Analysis of the light curves showed that the rotation period is 3.418 ± 0.001 hours with a light amplitude of 0.11 magnitude. [15] Previous observations from the Palomar Transient Factory survey in August 2012 gave a fragmented light curve with a longer period of 7.935 hours. [16]
Diameter and Albedo
According to surveys conducted by the Japanese satellite Akari and the NEOWISE mission of the Wide-field Infrared Survey Explorer , Hipparch is 15.13 to 18.87 km in diameter and has a low albedo of 0.039 to 0.052. [2] [3] [4] [5] [6] The Collaborative Asteroid Lightcurve Link source suggests a standard albedo value for a rocky asteroid rather than carbon, which results in a smaller diameter value of 8.18 km with an absolute magnitude of 12, 8. [9]
Notes
- ↑ JPL Small-Body Database
- ↑ 1 2 3 Nugent, CR; Mainzer, A .; Bauer, J .; Cutri, RM; Kramer, EA; Grav, T .; Masiero, J .; Sonnett, S .; Wright, EL NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos (Eng.) // The Astronomical Journal: journal. - 2016 .-- September ( vol. 152 , no. 3 ). - P. 12 . - DOI : 10.3847 / 0004-6256 / 152/3/63 . - . - arXiv : 1606.08923 .
- ↑ 1 2 3 Mainzer, AK; Bauer, JM; Cutri, RM; Grav, T .; Kramer, EA; Masiero, JR; Nugent, CR; Sonnett, SM; Stevenson, RA; Wright, EL NEOWISE Diameters and Albedos V1.0 (unknown) // NASA Planetary Data System. - 2016 .-- June. -
- ↑ 1 2 3 Masiero, Joseph R .; Grav, T .; Mainzer, AK; Nugent, CR; Bauer, JM; Stevenson, R .; Sonnett, S. Main-belt Asteroids with WISE / NEOWISE: Near-infrared Albedos (Eng.) // The Astrophysical Journal: journal. - 2014 .-- August ( vol. 791 , no. 2 ). - P. 11 . - DOI : 10.1088 / 0004-637X / 791/2/121 . - . - arXiv : 1406.6645 .
- ↑ 1 2 3 Mainzer, A .; Grav, T .; Masiero, J .; Hand, E .; Bauer, J .; Tholen, D .; McMillan, RS; Spahr, T .; Cutri, RM; Wright, E .; Watkins, J .; Mo, W .; Maleszewski, C. NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results (Eng.) // The Astrophysical Journal: journal. - 2011 .-- November ( vol. 741 , no. 2 ). - P. 25 . - DOI : 10.1088 / 0004-637X / 741/2/90 . - . - arXiv : 1109.6407 . ( catalog )
- ↑ 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G .; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; Ishihara, Daisuke; Kataza, Hirokazu; Takita, Satoshi; Oyabu, Shinki; Ueno, Munetaka; Matsuhara, Hideo; Onaka, Takashi. Asteroid Catalog Using Akari: AKARI / IRC Mid-Infrared Asteroid Survey // Publications of the Astronomical Society of Japan: journal. - 2011 .-- October ( vol. 63 , no. 5 ). - P. 1117-1138 . - DOI : 10.1093 / pasj / 63.5.1117 . - . ( online , AcuA catalog p. 153 )
- ↑ https://www.minorplanetcenter.net/db_search/show_object?object_id=4000
- ↑ 1 2 4000 Hipparchus (1989 AV) . Minor Planet Center . Date of appeal October 31, 2018.
- ↑ 1 2 LCDB Data for (4000) Hipparchus . Asteroid Lightcurve Database (LCDB). Date of appeal October 31, 2018.
- ↑ 1 2 Schmadel, Lutz D. Dictionary of Minor Planet Names - (4000) Hipparchus . - Springer Berlin Heidelberg, 2007 .-- ISBN 978-3-540-00238-3 .
- ↑ Small Bodies Data Ferret . Nesvorny HCM Asteroid Families V3.0 . Date of appeal October 31, 2018.
- ↑ JPL Small-Body Database Browser: 4000 Hipparchus (1989 AV) . Jet Propulsion Laboratory . Date of appeal October 31, 2018.
- ↑ MPC / MPO / MPS Archive . Minor Planet Center . Date of appeal October 31, 2018.
- ↑ 1 2 Asteroids, Meteorites, and Comets (2010). Date of appeal October 31, 2018.
- ↑ Odden, Caroline E .; Bond, J. Brooke; Aggarwal, Ashok K .; Seokjun, Yoon; Chapman, Kathryn J .; Fortin, Liam G .; He, David B .; Hurley, Cooper D .; Joli-Coeur, Laurent; Little, John; Neumann, A. Miles; Ortega, Marelene; Park, Ji Tae; Simard-Halm, Malina; Simon, Matthew I .; Taylor, Isabel O .; Zhu, Emily C. Lightcurve Analysis for Three Asteroids: 4000 Hipparchus, 5256 Farquhar and 5931 Zhvanetskij (Eng.) // The Minor Planet Bulletin: journal. - 2014 .-- October ( vol. 41 , no. 4 ). - P. 274-275 . - ISSN 1052-8091 . - .
- ↑ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O .; Laher, Russ; Masci, Frank; Levitan, David; Surace, Jason; Cheng, Yu-Chi; Ip, Wing-Huen; Kinoshita, Daisuke; Helou, George; Prince, Thomas A .; Kulkarni, Shrinivas. Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry (Eng.) // The Astronomical Journal: journal. - 2015 .-- September ( vol. 150 , no. 3 ). - P. 35 . - DOI : 10.1088 / 0004-6256 / 150/3/75 . - . - arXiv : 1504.04041 .
Links
- Asteroid 4000 Hipparchus , Small Bodies Data Ferret
- Asteroid Lightcurve Database (LCDB) , query form ( info )
- Dictionary of Minor Planet Names , Google books
- Discovery Circumstances: Numbered Minor Planets (1) - (5000) - Minor Planet Center