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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. The asteroid was named after amateur astronomer Pierre–Yves Schwaar.

Orbit and classification

Schwaar is a member of the Phocaea family (701), 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. No precoveries were taken. The asteroid's observation arc begins 20 days after its discovery.

Physical characteristics

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

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 (U=3-).

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, 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.

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. The official naming citation was published by the Minor Planet Center on 9 January 2001 (M.P.C. 41939). 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. ^ "JPL Small-Body Database Browser: 13006 Schwaar (1983 AC1)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 24 June 2017.
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. ^ "LCDB Data for (13006) Schwaar". Asteroid Lightcurve Database (LCDB). Retrieved 25 May 2016.
4. ^ "Asteroid 13006 Schwaar – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
5. ^ 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 3 December 2016.
6. ^ 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. Retrieved 25 May 2016.
7. ^ 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. Bibcode:2007MPBu...34...79H. ISSN 1052-8091. Retrieved 25 May 2016.
8. ^ 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 25 May 2016.
9. ^ "13006 Schwaar (1983 AC1)". Minor Planet Center. Retrieved 25 May 2016.
10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 May 2016.

External links

• Pierre-Yves Schwaar (14 May 1946 — 6 March 2000), Saguaro Astronomy Club, April 2000
• Sentinel-Schwaar Star Gaze, Joe Orman's website
• 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 (10001)-(15000) – Minor Planet Center
• 13006 Schwaar at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 13006 Schwaar at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Phocaea asteroids
• Discoveries by Brian A. Skiff
• Named minor planets
• Astronomical objects discovered in 1983