29292 Conniewalker

29292 Conniewalker
Discovery [1]
Discovered by C. Shoemaker
D. H. Levy
Discovery site Palomar Obs.
Discovery date 24 May 1993
Designations
MPC designation 29292 Conniewalker
Named after
 Connie Walker
(astronomer)[2]
1993 KZ1
main-belt · Phocaea [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 32.07 yr (11,713 days)
Aphelion 2.8156 AU
Perihelion 1.8815 AU
2.3485 AU
Eccentricity 0.1988
3.60 yr (1,315 days)
95.541°
0° 16m 25.68s / day
Inclination 25.546°
89.845°
170.03°
Physical characteristics
Dimensions 4.581±0.217 km[4]
4.571 km[5]
4.57 km (taken)[3]
30.6±0.05 h[6]
30.5 h[lower-alpha 1]
0.3674±0.0485[4]
0.3097[5]
S [3]
13.5[1]
13.59[3][5]
14.03[7]
13.10[lower-alpha 1]
13.4[4]

    29292 Conniewalker, provisional designation 1993 KZ1, is a bright stony Phocaea asteroid and slow tumbler from the inner regions of the asteroid belt, about 4.6 kilometers in diameter. It was discovered by American female astronomer Carolyn Shoemaker and Canadian astronomer David H. Levy at the U.S. Palomar Observatory, California, on 24 May 1993.[8]

    The S-type asteroid is a member of the Phocaea family. It orbits the Sun at a distance of 1.9–2.8 AU once every 3 years and 7 months (1,315 days). Its orbit has an eccentricity of 0.20 and an inclination of 26° with respect to the plane of the ecliptic.[1]

    In 2011, two photometric light-curve analysis at the U.S. Via Capote Observatory in California and at the Ondřejov Observatory, Czech Republic, rendered a rotation period of 30.6 and 30.5 hours, with a brightness amplitude of 0.62 and 0.63 in magnitude, respectively.[6][lower-alpha 1] The asteroid is a tumbler. The best light-curve result (U=3-) was achieved during 22 sessions over a 46-day period where the body showed a non-principal axis rotation (NPAR).[6] The slow tumbler had previously been a target in ASU's Photometric Survey for Asynchronous Binary Asteroids.[9]

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the body measures about 4.58 kilometers in diameter and has a very bright surface albedo of 0.36, while a later revision of the WISE data gave a lower but still high albedo of 0.31 with a diameter of 4.57 kilometers.[4][5] The Collaborative Asteroid Lightcurve Link (CALL) agrees on the revised data which also includes a raise of the body's absolute magnitude from 13.4 to 13.59.[3]

    The minor planet was named in honor of American female astronomer Connie Walker (b. 1957), who has examined the formation of stars in galaxies in varying stages of development. She is well known for the educational Project Astro-Tucson and her successful work in astronomy with children and young adults in the U.S. state of Arizona.[2]

    References

    1. 1 2 3 Pravec (2011) web: rotation period 30.5 hours with a brightness amplitude of 0.63 mag. LCDB assigns a quality code of 2, which means a result based on less than full coverage, so that the period may be wrong by 30 percent or so. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (29292) Conniewalker
    1. 1 2 3 4 "JPL Small-Body Database Browser: 29292 Conniewalker (1993 KZ1)" (2015-10-07 last obs.). Jet Propulsion Laboratory. Retrieved February 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (29292) Conniewalker [2.35, 0.20, 25.6]. Springer Berlin Heidelberg. p. 194. ISBN 978-3-540-00238-3. Retrieved February 2016.
    3. 1 2 3 4 5 "LCDB Data for (29292) Conniewalker". Asteroid Lightcurve Database (LCDB). Retrieved February 2016.
    4. 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 February 2016.
    5. 1 2 3 4 Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved February 2016.
    6. 1 2 3 Brinsfield, James W.; Pray, Donald; Pravec, Petr (July 2012). "The Lightcurve of 29292 Conniewalker". The Minor Planet Bulletin 39 (3): 156–157. Bibcode:2012MPBu...39..156B. ISSN 1052-8091. Retrieved February 2016.
    7. ↑ 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 February 2016.
    8. ↑ "29292 Conniewalker (1993 KZ1)". Minor Planet Center. Retrieved February 2016.
    9. ↑ "Photometric Survey for Asynchronous Binary Asteroids". Astronomical Institute of Czech Academy of Sciences. Retrieved February 2016.

    External links


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