1751 Herget

1751 Herget
Discovery[1]
Discovered byIndiana University
(Indiana Asteroid Program)
Discovery siteGoethe Link Obs.
Discovery date27 July 1955
Designations
(1751) Herget
Named after
Paul Herget[2]
(American astronomer)
1955 OC · 1955 QO
1955 RB · 1955 SP1
1962 CC · 1969 QA
main-belt · (middle)
Gefion[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc61.67 yr (22,526 days)
Aphelion3.2765 AU
Perihelion2.3002 AU
2.7883 AU
Eccentricity0.1751
4.66 yr (1,701 days)
78.845°
Inclination8.1315°
240.27°
130.93°
Physical characteristics
Dimensions10.929±0.248 km[4][5]
23.21 km (calculated)[6]
3.937±0.001 h[7]
3.9397±0.0006 h[8]
0.195±0.027[4][5]
0.057 (assumed)[6]
SMASS = S[1] · C[6]
11.80±0.05[7] · 11.9[1][6] · 12.06±0.41[9] · 12.2[5]

1751 Herget, provisional designation 1955 OC, is a stony Gefionian asteroid from the central region of the asteroid belt, approximately 11 kilometers in diameter.

It was discovered on 27 July 1955, by IU's Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States.[10] The asteroid was named after American astronomer Paul Herget.[2]

Classification and orbit

Herget is a member of the large Gefion family of asteroids (516).[3] It orbits the Sun in the central main-belt at a distance of 2.3–3.3 AU once every 4 years and 8 months (1,701 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.18 and an inclination of 8° with respect to the ecliptic.[1] As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation at Goethe Link in 1955.[10]

Physical characteristics

In the SMASS classification, Herget has been characterized as a common S-type asteroid,[1] which agrees with the overall spectral type of the Gefion family.[11]: 23 

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Herget measures 10.93 kilometers in diameter, and its surface has an albedo of 0.195,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 23.21 kilometers with an absolute magnitude of 11.9, as the lower the body's albedo (reflectivity), the larger its diameter.[6]

Rotation period

In November 2016, two rotational lightcurves of Herget were obtained from photometric observations by Italian astronomers Lorenzo Franco and Alessandro Marchini, as well as by French amateur astronomer René Roy. Lightcurve analysis gave a rotation period of 3.937 and 3.9397 hours with a brightness amplitude of 0.30 and 0.31 magnitude, respectively (U=3-/3).[7][8]

Naming

This minor planet was named in honor of American astronomer Paul Herget (1908–1981), who was director of the Cincinnati Observatory and distinguished service professor in the University of Cincinnati.[2]

Herget was also founder of the Minor Planet Center (MPC) in 1947, pioneer in the application of high speed computers to astronomical problems, member of the U.S. National Academy of Sciences, and past president of IAU's Commission 20 (Positions & Motions of Minor Planets, Comets & Satellites).[2] The official naming citation was published by the MPC on 20 February 1971 (M.P.C. 3143).[12]

References

  1. ^ a b c d e f "JPL Small-Body Database Browser: 1751 Herget (1955 OC)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 8 June 2017.
  2. ^ a b c d Schmadel, Lutz D. (2007). "(1751) Herget". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 139. doi:10.1007/978-3-540-29925-7_1752. ISBN 978-3-540-00238-3.
  3. ^ a b "Asteroid 1751 Herget – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
  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:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 20 December 2016.
  5. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  6. ^ a b c d e "LCDB Data for (1751) Herget". Asteroid Lightcurve Database (LCDB). Retrieved 8 June 2017.
  7. ^ a b c Franco, Lorenzo; Marchini, Alessandro (April 2017). "Rotation Periods for 1751 Herget, 2022 West and (23997) 1999 RW27". The Minor Planet Bulletin. 44 (2): 93–94. Bibcode:2017MPBu...44...93F. ISSN 1052-8091. Retrieved 8 June 2017.
  8. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1751) Herget". Geneva Observatory. Retrieved 27 December 2016.
  9. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 8 June 2017.
  10. ^ a b "1751 Herget (1955 OC)". Minor Planet Center. Retrieved 20 December 2016.
  11. ^ 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 978-0-8165-3213-1.
  12. ^ 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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