1597 Laugier

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]

1597 Laugier
Shape model of Laugier from its lightcurve
Discovery [1]
Discovered byL. Boyer
Discovery siteAlgiers Obs.
Discovery date7 March 1949
Designations
(1597) Laugier
Named after
Marguerite Laugier
(French astronomer)[2]
1949 EB
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc68.01 yr (24,840 days)
Aphelion3.1024 AU
Perihelion2.5869 AU
2.8446 AU
Eccentricity0.0906
4.80 yr (1,752 days)
67.764°
0° 12m 19.44s / day
Inclination11.812°
158.63°
52.042°
Physical characteristics
Dimensions12.885±0.169[4]
24.30 km (calculated)[3]
8.0199 h[3]
8.02272 h[5]
0.057 (assumed)[3]
0.244±0.033[4]
C [3]
11.7[1] · 11.8[3]

    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    A rotational lightcurve for this asteroid from an unpublished source at the Asteroid Light Curve Database gave a well-defined rotation period of 8.020 hours with a brightness amplitude between 0.68 and 0.71 in magnitude (U=3).[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. "JPL Small-Body Database Browser: 1597 Laugier (1949 EB)" (2017-03-10 last obs.). Jet Propulsion Laboratory. Retrieved 5 June 2017.
    2. 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. "LCDB Data for (1597) Laugier". Asteroid Lightcurve Database (LCDB). Retrieved 20 July 2016.
    4. 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. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 8 December 2016.
    5. Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 20 July 2016.
    6. "1597 Laugier (1949 EB)". Minor Planet Center. Retrieved 20 July 2016.
    7. 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.

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