Astronomy:1597 Laugier
_Laugier.png) Shape model of Laugier from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | L. Boyer |
| Discovery site | Algiers Obs. |
| Discovery date | 7 March 1949 |
| Designations | |
| (1597) Laugier | |
| Named after | Marguerite Laugier (French astronomer)[2] |
| 1949 EB | |
| Minor planet category | main-belt · (outer)[3] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 68.01 yr (24,840 days) |
| |{{{apsis}}}|helion}} | 3.1024 AU |
| |{{{apsis}}}|helion}} | 2.5869 AU |
| 2.8446 AU | |
| Eccentricity | 0.0906 |
| Orbital period | 4.80 yr (1,752 days) |
| Mean anomaly | 67.764° |
| Mean motion | 0° 12m 19.44s / day |
| Inclination | 11.812° |
| Longitude of ascending node | 158.63° |
| 52.042° | |
| Physical characteristics | |
| Dimensions | 12.885±0.169[4] 24.30 km (calculated)[3] |
| Rotation period | 8.0199 h[3] 8.02272 h[5] |
| Geometric albedo | 0.057 (assumed)[3] 0.244±0.033[4] |
| C[3] | |
| Absolute magnitude (H) | 11.7[1] · 11.8[3] |
1597 Laugier, provisional designation 1949 EB, is an asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 7 March 1949, by French astronomer Louis Boyer at the north African Algiers Observatory in Algeria.[6] It was later named after French astronomer Marguerite Laugier.[2]
Orbit and classification
This asteroid orbits the Sun in the outer main-belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,752 days). Its orbit has an eccentricity of 0.09 and an inclination of 12° with respect to the ecliptic.[1] As no precoveries were taken and no prior identifications were made, Laugier's observation arc begins with its official discovery observation in 1949.[6]
Physical characteristics
Laugier is a presumed C-type asteroid[3]
Lightcurves
A rotational lightcurve for this asteroid from an unpublished source at the Asteroid Light Curve Database gave a well-defined rotation period of 8.020 hours with a brightness amplitude between 0.68 and 0.71 in magnitude ({{{1}}}).[3] A similar period of 8.023 hours was previously obtained from remodeled data of the Lowell photometric database in March 2016.[1][5]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Laugier measures 12.9 kilometers in diameter and its surface has an albedo of 0.244,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057, and calculates a diameter of 24.3 kilometers based on an absolute magnitude of 11.8.[3]
Naming
This minor planet was named after French astronomer and asteroid discoverer Marguerite Laugier (1896–1976). The official naming citation was published by the Minor Planet Center on 1 August 1978 (M.P.C. 4418).[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 1597 Laugier (1949 EB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001597.
- ↑ 2.0 2.1 Schmadel, Lutz D. (2007). "(1597) Laugier". Dictionary of Minor Planet Names – (1597) Laugier. Springer Berlin Heidelberg. p. 126. doi:10.1007/978-3-540-29925-7_1598. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 "LCDB Data for (1597) Laugier". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1597%7CLaugier.
- ↑ 4.0 4.1 4.2 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 8 December 2016.
- ↑ 5.0 5.1 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 20 July 2016.
- ↑ 6.0 6.1 "1597 Laugier (1949 EB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1597.
- ↑ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7. https://archive.org/details/dictionaryminorp2008schm.
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
- 1597 Laugier at AstDyS-2, Asteroids—Dynamic Site
- 1597 Laugier at the JPL Small-Body Database
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