1755 Lorbach

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

1755 Lorbach

Discovery[1]
Discovered by	M. Laugier
Discovery site	Nice Obs.
Discovery date	8 November 1936
Designations
MPC designation	(1755) Lorbach
Named after	Anne Lorbach Herget (wife of Paul Herget)[2]
Alternative designations	1936 VD · 1935 QA1 1936 UK · 1949 ED 1956 NA · 1960 EA 1965 AV · A924 PA
Minor planet category	main-belt · (outer) Eos[3]
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
Semi-major axis	3.0917 AU
Eccentricity	0.0477
Orbital period (sidereal)	5.44 yr (1,986 days)
Mean anomaly	241.19°
Mean motion	0° 10m 52.68s / day
Inclination	10.707°
Longitude of ascending node	157.11°
Argument of perihelion	322.08°
Physical characteristics
Dimensions	24.878±0.265 km[4]
Geometric albedo	0.140±0.024[4]
Spectral type	Tholen = S[1] B–V = 0.915[1] U–B = 0.360[1]
Absolute magnitude (H)	10.77[1]

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

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

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.

Naming

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 on 1 August 1978 (M.P.C. 4419).^[7]

References

1. "JPL Small-Body Database Browser: 1755 Lorbach (1936 VD)" (2017-04-26 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017.
2. Schmadel, Lutz D. (2007). "(1755) Lorbach". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 140. doi:10.1007/978-3-540-29925-7_1756. ISBN 978-3-540-00238-3.
3. "Asteroid 1755 Lorbach – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
4. 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:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 20 December 2016.
5. "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". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
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.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• 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
• 1755 Lorbach at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1755 Lorbach at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters