1597 Laugier

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1597 Laugier
Discovery [1]
Discovered by L. Boyer
Discovery site Algiers Obs.
Discovery date 7 March 1949
MPC designation (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 arc 68.01 yr (24,840 days)
Aphelion 3.1024 AU
Perihelion 2.5869 AU
2.8446 AU
Eccentricity 0.0906
4.80 yr (1,752 days)
0° 12m 19.44s / day
Inclination 11.812°
Physical characteristics
Dimensions 12.885±0.169[4]
24.30 km (calculated)[3]
8.0199 h[3]
8.02272 h[5]
0.057 (assumed)[3]
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[edit]

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[edit]

Laugier is a presumed C-type asteroid[3]


A rotational lightcurve for this asteroid from an unpublished source at the Asteroid Light Curve Database gave a well-defined rotation period of 8.020 hours with a brightness amplitude between 0.68 and 0.71 in magnitude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[edit]

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 an 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]


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 before November 1977 (M.P.C. 4418).[7]


  1. ^ a b c d e "JPL Small-Body Database Browser: 1597 Laugier (1949 EB)" (2017-03-10 last obs.). Jet Propulsion Laboratory. Retrieved 5 June 2017. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1597) Laugier. Springer Berlin Heidelberg. p. 126. ISBN 978-3-540-00238-3. Retrieved 20 July 2016. 
  3. ^ a b c d e f g h i "LCDB Data for (1597) Laugier". Asteroid Lightcurve Database (LCDB). Retrieved 20 July 2016. 
  4. ^ a b c 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:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 8 December 2016. 
  5. ^ a b Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909Freely accessible. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 20 July 2016. 
  6. ^ a b "1597 Laugier (1949 EB)". Minor Planet Center. Retrieved 20 July 2016. 
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 July 2016. 

External links[edit]