13006 Schwaar
Discovery [1] | |
---|---|
Discovered by | B. A. Skiff |
Discovery site | Anderson Mesa Stn. |
Discovery date | 12 January 1983 |
Designations | |
MPC designation | (13006) Schwaar |
Named after |
Pierre–Yves Schwaar (American amateur astronomer)[2] |
1983 AC1 · 1990 DH | |
main-belt · Phocaea [3] | |
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 | |
Dimensions |
5.04 km (calculated)[3] ±0.052 5.325[4] ±0.113 km 5.892[5] |
6.8h[6] | |
±0.038 0.182[4] ±0.0281 0.1850[5] 0.23 (assumed)[3] | |
S [3][7] | |
13.6[5] · 13.7[1][3] · ±0.22 13.97[7] | |
|
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.[8] The asteroid was named after amateur astronomer Pierre–Yves Schwaar.[2]
Orbit and classification
Schwaar is a member of the Phocaea family, 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.[8]
Physical characteristics
Schwaar has been characterized as a S-type asteroid by Pan-STARRS photometric survey.[7]
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 hours with a brightness variation of 0.17 in 6.8magnitude (U=3-).[6]
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,[5][4] 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).[9] 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 2 3 4 "JPL Small-Body Database Browser: 13006 Schwaar (1983 AC1)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 24 June 2017.
- 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (13006) Schwaar. Springer Berlin Heidelberg. p. 791. ISBN 978-3-540-00238-3. Retrieved 25 May 2016.
- 1 2 3 4 5 6 "LCDB Data for (13006) Schwaar". Asteroid Lightcurve Database (LCDB). Retrieved 25 May 2016.
- 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. Bibcode:2011ApJ...741...68M. arXiv:1109.4096 . doi:10.1088/0004-637X/741/2/68. Retrieved 3 December 2016.
- 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. Bibcode:2011ApJ...741...90M. arXiv:1109.6407 . doi:10.1088/0004-637X/741/2/90. Retrieved 25 May 2016.
- 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.
- 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. Bibcode:2015Icar..261...34V. arXiv:1506.00762 . doi:10.1016/j.icarus.2015.08.007. Retrieved 25 May 2016.
- 1 2 "13006 Schwaar (1983 AC1)". Minor Planet Center. Retrieved 25 May 2016.
- ↑ "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)
- 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 the JPL Small-Body Database