1755 Lorbach

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1755 Lorbach
Discovery [1]
Discovered by M. Laugier
Discovery site Nice Obs.
Discovery date 8 November 1936
MPC designation (1755) Lorbach
Named after
Anne Lorbach Herget
(wife of Paul Herget)[2]
1936 VD · 1935 QA1
1936 UK · 1949 ED
1956 NA · 1960 EA
1965 AV · A924 PA
main-belt · (outer)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 92.72 yr (33,866 days)
Aphelion 3.2391 AU
Perihelion 2.9443 AU
3.0917 AU
Eccentricity 0.0477
5.44 yr (1,986 days)
0° 10m 52.68s / day
Inclination 10.707°
Physical characteristics
Dimensions 24.878±0.265 km[4]
Tholen = S[1]
B–V = 0.915[1]
U–B = 0.360[1]

1755 Lorbach, provisional designation 1936 VD, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter.

It was discovered on 8 November 1936, by French astronomer Marguerite Laugier at Nice Observatory in southeastern France,[5] and named after Anne Lorbach Herget, wife of astronomer Paul Herget.[2]

Classification and orbit[edit]

Lorbach is a member of the Eos family (606), the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids.[3][6]:23 It orbits the Sun at a distance of 2.9–3.2 AU once every 5 years and 5 months (1,986 days). Its orbit has an eccentricity of 0.05 and an inclination of 11° with respect to the ecliptic.[1] Lorbach was first identified as A924 PA at Heidelberg Observatory in 1924. The body's observation arc, however, begins 2 days after its official discovery observation at Nice in 1936.[5]

Physical characteristics[edit]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lorbach measures 24.88 kilometers in diameter, and its surface has an albedo of 0.140.[4] It is a stony S-type asteroid on the Tholen taxonomic scheme, and has an absolute magnitude of 10.77.[1] As of 2017, Lorbach's spectral type, rotation period and shape remain unknown.


This minor planet was named after the maiden name of American Anne Lorbach Herget, second wife of astronomer Paul Herget, after whom the minor planet 1751 Herget is named. Anne worked as an assistant at the Cincinnati Observatory since the 1960s, key-punching MPC-data and assigning provisional designations to minor planets.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4419).[7]


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1755 Lorbach (1936 VD)" (2017-04-26 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1755) Lorbach. Springer Berlin Heidelberg. p. 140. ISBN 978-3-540-00238-3. Retrieved 20 December 2016. 
  3. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 21 November 2017. 
  4. ^ a b c 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. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 20 December 2016. 
  5. ^ a b "1755 Lorbach (1936 VD)". Minor Planet Center. Retrieved 20 December 2016. 
  6. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628Freely accessible. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 21 November 2017. 
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 December 2016. 

External links[edit]