13006 Schwaar

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13006 Schwaar
Discovery [1]
Discovered by B. A. Skiff
Discovery site Anderson Mesa Stn.
Discovery date12 January 1983
Designations
(13006) Schwaar
Named after
Pierre–Yves Schwaar
(American amateur astronomer) [2]
1983 AC1 ·1990 DH
main-belt  · Phocaea [3] [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 34.21 yr (12,495 days)
Aphelion 2.7336 AU
Perihelion 1.8143 AU
2.2739 AU
Eccentricity 0.2021
3.43 yr (1,252 days)
29.457°
0° 17m 14.64s / day
Inclination 28.523°
129.27°
358.22°
Physical characteristics
Dimensions5.04 km (calculated) [3]
5.325±0.052 [5]
5.892±0.113 km [6]
6.8 h [7]
0.182±0.038 [5]
0.1850±0.0281 [6]
0.23 (assumed) [3]
S [3] [8]
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]

    Contents

    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 ( U=3- ). [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.

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    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 13006 Schwaar (1983 AC1)" (2017-03-29 last obs.). Jet Propulsion Laboratory . Retrieved 24 June 2017.
    2. 1 2 3 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. 1 2 3 4 5 6 "LCDB Data for (13006) Schwaar". Asteroid Lightcurve Database (LCDB). Retrieved 25 May 2016.
    4. 1 2 "Asteroid 13006 Schwaar – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
    5. 1 2 3 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. 1 2 3 4 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. 1 2 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. 1 2 3 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. 1 2 "13006 Schwaar (1983 AC1)". Minor Planet Center. Retrieved 25 May 2016.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 May 2016.
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