Astronomy:3823 Yorii
| Discovery [1] | |
|---|---|
| Discovered by | M. Arai H. Mori |
| Discovery site | Yorii Obs. |
| Discovery date | 10 March 1988 |
| Designations | |
| (3823) Yorii | |
| Named after | Yorii (Japanese town)[2] |
| 1988 EC1 · 1966 BS 1975 TV3 · 1977 DM4 1980 TH2 · 1982 BP8 1986 WU2 | |
| Minor planet category | main-belt · (outer) [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 49.55 yr (18,098 days) |
| |{{{apsis}}}|helion}} | 3.8268 AU |
| |{{{apsis}}}|helion}} | 2.3039 AU |
| 3.0654 AU | |
| Eccentricity | 0.2484 |
| Orbital period | 5.37 yr (1,960 days) |
| Mean anomaly | 202.60° |
| Mean motion | 0° 11m 0.96s / day |
| Inclination | 5.5061° |
| Longitude of ascending node | 112.03° |
| 15.510° | |
| Physical characteristics | |
| Dimensions | 9.36±3.02 km[4] 10.60±2.42 km[5] 12.438±0.111 km[6][7] 13.98 km (calculated)[3] |
| Rotation period | 6.669±0.005 h[8] |
| Geometric albedo | 0.057 (assumed)[3] 0.091±0.014[7] 0.10±0.05[5] 0.10±0.12[4] 0.1041±0.0183[6] |
| C [3][9] | |
| Absolute magnitude (H) | 12.6[6] · 12.84±0.34[9] · 13.00[1][3][5] · 13.22[4] |
3823 Yorii, provisional designation 1988 EC1, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 11 kilometers in diameter.
The asteroid was discovered on 10 March 1988, by Japanese amateur astronomers Masaru Arai and Hiroshi Mori at Yorii Observatory (875) in central Japan.[10] It was named for the Japanese town of Yorii, location of the discovering observatory.[2]
Orbit and classification
Yorii orbits the Sun in the outer main-belt at a distance of 2.3–3.8 AU once every 5 years and 4 months (1,960 days). Its orbit has an eccentricity of 0.25 and an inclination of 6° with respect to the ecliptic.[1] It was first identified as 1966 BS at Purple Mountain Observatory in 1966, extending the body's observation arc by 22 years prior to its official discovery observation at Yorii.[10]
Physical characteristics
Yorii has been characterized as a carbonaceous C-type asteroid by PanSTARRS' photometric survey.[3][9]
Rotation period
In October 2013, American astronomer Brian Warner obtained a rotational lightcurve of Yorii from photometric observations taken at his Palmer Divide Observatory (716), Colorado. Lightcurve analysis gave a well-defined rotation period of 6.669 hours with a brightness variation of 0.26 magnitude ({{{1}}}).[8]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Yorii measures between 9.36 and 12.44 kilometers in diameter, and its surface has an albedo between 0.091 and 0.104.[4][5][6][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 13.98 kilometers with an absolute magnitude of 13.00.[3]
Naming
This minor planet was named for Yorii, a Japanese town and location of the discovering Yorii Observatory. Yorii is located in the Ōsato District of the Saitama Prefecture in Japan's central Kantō region. The Dodaira Observatory of Tokyo Astronomical Observatory is also located near Yorii.[2] The official naming citation was published by the Minor Planet Center on 27 August 1988 (M.P.C. 13483).[11]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 3823 Yorii (1988 EC1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003823.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(3823) Yorii". Dictionary of Minor Planet Names – (3823) Yorii. Springer Berlin Heidelberg. p. 324. doi:10.1007/978-3-540-29925-7_3816. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (3823) Yorii". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=3823%7CYorii.
- ↑ 4.0 4.1 4.2 4.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N.
- ↑ 5.0 5.1 5.2 5.3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T. et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal 814 (2): 13. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N. Retrieved 3 January 2017.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ 7.0 7.1 7.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 3 January 2017.
- ↑ 8.0 8.1 Warner, Brian D. (April 2014). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2013 September-December". The Minor Planet Bulletin 41 (2): 102–112. ISSN 1052-8091. PMID 32549045. Bibcode: 2014MPBu...41..102W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..102W. Retrieved 3 January 2017.
- ↑ 9.0 9.1 9.2 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 3 January 2017.
- ↑ 10.0 10.1 "3823 Yorii (1988 EC1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=3823.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 3823 Yorii at AstDyS-2, Asteroids—Dynamic Site
- 3823 Yorii at the JPL Small-Body Database
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