Astronomy:2029 Binomi
| Discovery [1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 11 September 1969 |
| Designations | |
| (2029) Binomi | |
| Named after | Alessandro Binomi (fictitious mathematician)[2] |
| 1969 RB · 1971 BX2 1976 QV1 | |
| Minor planet category | main-belt · Vesta [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 47.52 yr (17,355 days) |
| |{{{apsis}}}|helion}} | 2.6515 AU |
| |{{{apsis}}}|helion}} | 2.0477 AU |
| 2.3496 AU | |
| Eccentricity | 0.1285 |
| Orbital period | 3.60 yr (1,316 days) |
| Mean anomaly | 120.75° |
| Mean motion | 0° 16m 25.32s / day |
| Inclination | 5.5869° |
| Longitude of ascending node | 278.03° |
| 67.217° | |
| Physical characteristics | |
| Dimensions | 5.39 km (calculated)[3] 6.893±0.164 km[4] 7.050±0.058 km[5] |
| Rotation period | 3.7555±0.010 h[6] 3.756±0.0015 h[7] |
| Geometric albedo | 0.24 (assumed)[3] 0.2468±0.0358[5] 0.257±0.048[4] |
| SMASS = S [1][3] | |
| Absolute magnitude (H) | 12.9[5] · 13.0[1] · 13.030±0.210 (R)[6] · 13.058±0.001 (R)[7] · 13.24±0.26[8] · 13.51[3] |
2029 Binomi, provisional designation 1969 RB, is a Vestian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter.
The asteroid was discovered on 11 September 1969, by Paul Wild at Zimmerwald Observatory near Bern, Switzerland.[9] It was named for the fictitious mathematician "Alessandro Binomi" who invented the binomial formula.[2]
Classification and orbit
Binomi is a member of the Vesta family, one of the largest collisional populations of the inner asteroid belt. It orbits the Sun at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,316 days). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic.[1]
The body's observation arc begins at Crimea–Nauchnij on 10 September 1969, the night before its official discovery observation at Zimmerwald.[9]
Physical characteristics
In the SMASS classification, Binomi is a stony S-type asteroid.[1]
Lightcurves
In January 2014, two rotational lightcurves of Binomi were obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.7555 and 3.756 hours with a brightness variation of 0.51 and 0.52 magnitude, respectively ({{{1}}}).[6][7]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Binomi measures 6.893 and 7.050 kilometers in diameter and its surface has an albedo of 0.2468 and 0.257, respectively.[4][5]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and calculates a diameter of 5.39 kilometers based on an absolute magnitude of 13.51.[3]
Naming
This minor planet was named for the fictitious mathematician "Alessandro Binomi", inventor of the binomial formula. This act of parody science was common among students at German-speaking universities (:de:Binomi). The real inventors of the binomial formula are the Bernoullis, after whom the asteroid 2034 Bernoulli was named.[2] The approved naming citation was published by the Minor Planet Center on 1 August 1981 (M.P.C. 6208).[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 2029 Binomi (1969 RB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002029. Retrieved 28 June 2017.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(2029) Binomi". Dictionary of Minor Planet Names – (2029) Binomi. Springer Berlin Heidelberg. p. 164. doi:10.1007/978-3-540-29925-7_2030. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (2029) Binomi". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2029%7CBinomi. Retrieved 28 June 2017.
- ↑ 4.0 4.1 4.2 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 28 June 2017.
- ↑ 5.0 5.1 5.2 5.3 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.
- ↑ 6.0 6.1 6.2 Chang, Chan-Kao (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series 219 (2): 19. doi:10.1088/0067-0049/219/2/27. Bibcode: 2015ApJS..219...27C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJS..219...27C. Retrieved 28 June 2017.
- ↑ 7.0 7.1 7.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 28 June 2017.
- ↑ 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 28 June 2017.
- ↑ 9.0 9.1 "2029 Binomi (1969 RB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2029. Retrieved 28 June 2017.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 28 June 2017.
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
- 2029 Binomi at AstDyS-2, Asteroids—Dynamic Site
- 2029 Binomi at the JPL Small-Body Database
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