Astronomy:13006 Schwaar

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Short description: Phocaea asteroid
13006 Schwaar
Discovery[1]
Discovered byB. A. Skiff
Discovery siteAnderson Mesa Stn.
Discovery date12 January 1983
Designations
(13006) Schwaar
Named afterPierre–Yves Schwaar
(American amateur astronomer)[2]
1983 AC1 · 1990 DH
Minor planet categorymain-belt · Phocaea[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc34.21 yr (12,495 days)
|{{{apsis}}}|helion}}2.7336 AU
|{{{apsis}}}|helion}}1.8143 AU
2.2739 AU
Eccentricity0.2021
Orbital period3.43 yr (1,252 days)
Mean anomaly29.457°
Mean motion0° 17m 14.64s / day
Inclination28.523°
Longitude of ascending node129.27°
358.22°
Physical characteristics
Dimensions5.04 km (calculated)[3]
5.325±0.052[5]
5.892±0.113 km[6]
Rotation period6.8 h[7]
Geometric albedo0.182±0.038[5]
0.1850±0.0281[6]
0.23 (assumed)[3]
S[3][8]
Absolute magnitude (H)13.6[6] · 13.7[1][3] · 13.97±0.22[8]


13006 Schwaar, provisional designation 1983 AC1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 12 January 1983, by American astronomer Brian Skiff at Lowell's Anderson Mesa Station in Flagstaff, Arizona.[9] The asteroid was named after amateur astronomer Pierre–Yves Schwaar.[2]

Orbit and classification

Schwaar is a member of the Phocaea family (701),[4] a rather small group of asteroids with similar orbital characteristics, named after its largest member, 25 Phocaea. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 5 months (1,252 days). Its orbit has an eccentricity of 0.20 and an inclination of 29° with respect to the ecliptic.[1] No precoveries were taken. The asteroid's observation arc begins 20 days after its discovery.[9]

Physical characteristics

Schwaar has been characterized as a S-type asteroid by Pan-STARRS photometric survey.[8]

Lightcurves

A rotational lightcurve of Schwaar was obtained from photometric observations made at the Hunters Hill Observatory (E14), Australia, and collaborating stations in December 2006. The lightcurve gave a rotation period of 6.8 hours with a brightness variation of 0.17 in magnitude ({{{1}}}).[7]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Schwaar measures 5.3 and 5.9 kilometers in diameter and its surface has an albedo of 0.182 and 0.185, respectively,[6][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for members of the Phocaea family of 0.23, and calculates a diameter of 5.0 kilometers with an absolute magnitude of 13.7.[3]

Naming

This minor planet was named in memory amateur astronomer Pierre–Yves Schwaar (1946–2000), member of the Saguaro Astronomy Club (SAC), telescope maker, and photographer of the night sky.[2] The official naming citation was published by the Minor Planet Center on 9 January 2001 (M.P.C. 41939).[10] The native Swiss amateur astronomer and immigrant to the U.S. was also an inventor and master craftsman, a model rocketeer, an USAF aircraft mechanic, a Vietnam veteran, and an eclipse chaser.

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 13006 Schwaar (1983 AC1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2013006. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(13006) Schwaar". Dictionary of Minor Planet Names – (13006) Schwaar. Springer Berlin Heidelberg. p. 791. doi:10.1007/978-3-540-29925-7_8722. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (13006) Schwaar". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=13006%7CSchwaar. 
  4. ↑ 4.0 4.1 "Asteroid 13006 Schwaar – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=13006+Schwaar#Asteroid%2013006%20SchwaarEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. 
  5. ↑ 5.0 5.1 5.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 3 December 2016. 
  6. ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M. Retrieved 25 May 2016. 
  7. ↑ 7.0 7.1 Higgins, David; Oey, Julian (September 2007). "Asteroid Lightcurve Analysis at Hunters Hill Observatory and Collaborating Stations - December 2006 - April 2007". The Minor Planet Bulletin 34 (3): 79–80. ISSN 1052-8091. Bibcode: 2007MPBu...34...79H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34...79H. Retrieved 25 May 2016. 
  8. ↑ 8.0 8.1 8.2 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 25 May 2016. 
  9. ↑ 9.0 9.1 "13006 Schwaar (1983 AC1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=13006. 
  10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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