9641 Demazière
| Discovery [1] | |
|---|---|
| Discovered by | E. W. Elst |
| Discovery site | La Silla Obs. |
| Discovery date | 12 August 1994 |
| Designations | |
| MPC designation | 9641 Demazière |
Named after |
Martine De Mazière (scientist)[2] |
| 1994 PB30 · 1997 GY36 | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24.34 yr (8,889 days) |
| Aphelion | 2.7771 AU |
| Perihelion | 2.1278 AU |
| 2.4524 AU | |
| Eccentricity | 0.1324 |
| 3.84 yr (1,403 days) | |
| 349.30° | |
| 0° 15m 23.76s / day | |
| Inclination | 4.7578° |
| 222.02° | |
| 60.616° | |
| Physical characteristics | |
| Dimensions | 2.71 km (calculated)[3] |
| 9.9121±0.0527 h[4] | |
| 0.20 (assumed)[3] | |
| S [3] · V [5] | |
|
14.5[1] 14.751±0.009 (R)[4] 14.73±0.22[5] 15.2[3] | |
|
| |
9641 Demazière, provisional designation 1994 PB30, is a stony asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered by Belgian astronomer Eric Elst at ESO's La Silla Observatory site in northern Chile on 12 August 1994.[6]
The stony S-type body is also classified as a V-type or vestoid asteroid.[5] It orbits the Sun at a distance of 2.1–2.8 AU once every 3 years and 10 months (1,403 days). Its orbit has an eccentricity of 0.13 and an inclination of 5° with respect to the ecliptic.[1] The first precovery was obtained at Steward Observatory (Kitt Peak–Spacewatch) in 1991, extending the asteroid's observation arc by 3 years prior to its discovery.[6]
A rotational light-curve was obtained from photometric observations made at the U.S. Palomar Transient Factory, California, in November 2010. It showed a rotation period of 9.9121±0.0527 hours with a brightness amplitude of 0.9 in magnitude (U=2).[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 2.7 kilometers, based on an absolute magnitude of 15.2.[3]
The minor planet was named in honor of Belgian female scientist Martine De Mazière (b. 1960), director-general at the Belgian Institute for Space Aeronomy as of 2016.[7] Working with the optical scanning of Earth's atmosphere, her research focuses on the effect of aerosols in the atmosphere's composition. Mazière has also assessed the post-Pinatubo NO2 reduction and recovery, using spectroscopic observations in the UV and visible made at the Swiss Sphinx Observatory (Jungfraujoch) over a period of 10 years.[2] Naming citation was published on 4 May 1999 (M.P.C. 34630).[8]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 9641 Demaziere (1994 PB30)" (2016-04-29 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (9641) Demazière. Springer Berlin Heidelberg. p. 701. ISBN 978-3-540-00238-3. Retrieved 13 April 2016.
- 1 2 3 4 5 6 "LCDB Data for (9641) Demaziere". Asteroid Lightcurve Database (LCDB). Retrieved 13 April 2016.
- 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. - 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.
- 1 2 "9641 Demaziere (1994 PB30)". Minor Planet Center. Retrieved 13 April 2016.
- ↑ "Belgian Institute for Space Aeronomy". Belspo. Retrieved 13 April 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.
External links
- Martine De Mazière, Belgian Institute for Space Space Aeronomy, Brussels, Belgium (at ResearchGate)
- BIRA-IASB, Royal Belgian Institute for Space Aeronomy
- 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 (5001)-(10000) – Minor Planet Center
- 9641 Demazière at the JPL Small-Body Database
