Astronomy:1672 Gezelle
_Gezelle.png) Shape model of Gezelle from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 29 January 1935 |
| Designations | |
| (1672) Gezelle | |
| Named after | Guido Gezelle (poet and priest)[2] |
| 1935 BD · 1929 AA 1933 SE1 · 1939 VK 1950 SX · 1978 NA8 A924 EO | |
| Minor planet category | main-belt · (outer)[3] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.62 yr (30,542 days) |
| |{{{apsis}}}|helion}} | 4.0486 AU |
| |{{{apsis}}}|helion}} | 2.2952 AU |
| 3.1719 AU | |
| Eccentricity | 0.2764 |
| Orbital period | 5.65 yr (2,063 days) |
| Mean anomaly | 183.87° |
| Mean motion | 0° 10m 28.2s / day |
| Inclination | 1.0672° |
| Longitude of ascending node | 181.29° |
| 255.12° | |
| Physical characteristics | |
| Dimensions | 26.205±0.202 km[4] 26.335±0.216 km[5] 26.56±1.86 km[6] 27.90 km (calculated)[3] |
| Rotation period | 40.6821±0.0001 h[7] 40.6824±0.0005 h[8] 40.72±0.01 h[9] |
| Geometric albedo | 0.055±0.004[5] 0.057 (assumed)[3] 0.092±0.014[6] 0.0936±0.0162[4] |
| C[3][10] | |
| Absolute magnitude (H) | 11.10[6] · 11.1[4] · 11.46±0.32[10] · 11.5[1][3] |
1672 Gezelle, provisional designation 1935 BD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 29 January 1935, by Belgian astronomer Eugène Delporte at Royal Observatory of Belgium in Uccle, Belgium.[11] It was later named after Flemish poet and Roman Catholic priest Guido Gezelle.[2]
Orbit and classification
The C-type asteroid orbits the Sun at a distance of 2.3–4.0 AU once every 5 years and 8 months (2,063 days). Its orbit has an eccentricity of 0.28 and an inclination of 1° with respect to the ecliptic.[1] Gezelle's first identification as A924 EO at Heidelberg Observatory remained unused. Its observation arc begins 9 days after its official discovery observation.[11]
Physical characteristics
Rotation period
Astronomer James W. Brinsfield obtained a rotational lightcurve of Gezelle at the Via Capote Observatory (G69) in October 2008. It gave a well defined rotation period of 40.72 hours with a brightness variation of 0.56 magnitude ({{{1}}}).[9] In 2016, similar periods of 40.6821 and 40.6824 hours were obtained from modeled photometric observations derived from the Lowell Photometric Database and other sources ({{{1}}}).[7][8]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gezelle measures between 26.21 and 26.56 kilometers in diameter and its surface has an albedo between 0.055 and 0.093.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 27.90 kilometers based on an absolute magnitude of 11.5.[3]
Naming
This minor planet was named in memory of famous Flemish poet and Roman Catholic priest Guido Gezelle (1830–1899), who wrote extensively on religion and nature.[2] The official naming citation was published by the Minor Planet Center on 8 April 1982 (M.P.C. 6832).[12]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1672 Gezelle (1935 BD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001672.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1672) Gezelle". Dictionary of Minor Planet Names – (1672) Gezelle. Springer Berlin Heidelberg. p. 133. doi:10.1007/978-3-540-29925-7_1673. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (1672) Gezelle". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1672%7CGezelle.
- ↑ 4.0 4.1 4.2 4.3 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.
- ↑ 5.0 5.1 5.2 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 23 December 2016.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
- ↑ 7.0 7.1 Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics 587: 6. doi:10.1051/0004-6361/201527573. Bibcode: 2016A&A...587A..48D. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D. Retrieved 23 December 2016.
- ↑ 8.0 8.1 Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M. et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics 586: 24. doi:10.1051/0004-6361/201527441. Bibcode: 2016A&A...586A.108H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...586A.108H. Retrieved 23 December 2016.
- ↑ 9.0 9.1 Brinsfield, James W. (April 2009). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 2008 4th Quarter". The Minor Planet Bulletin 36 (2): 64–66. ISSN 1052-8091. Bibcode: 2009MPBu...36...64B. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36...64B. Retrieved 23 December 2016.
- ↑ 10.0 10.1 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 23 December 2016.
- ↑ 11.0 11.1 "1672 Gezelle (1935 BD)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1672.
- ↑ "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
- 1672 Gezelle at AstDyS-2, Asteroids—Dynamic Site
- 1672 Gezelle at the JPL Small-Body Database
 |  |
