15262 Abderhalden

15262 Abderhalden, provisional designation 1990 TG4, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 12 kilometers in diameter.

15262 Abderhalden
Discovery [1]
Discovered byF. Börngen
L. D. Schmadel
Discovery siteTautenburg Obs.
Discovery date12 October 1990
Designations
(15262) Abderhalden
Named after
Emil Abderhalden
(Swiss physiologist)[2]
1990 TG4 · 1978 PJ3
1978 RM3 · 1999 FO42
main-belt · Themis [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc38.82 yr (14,178 days)
Aphelion3.6694 AU
Perihelion2.7536 AU
3.2115 AU
Eccentricity0.1426
5.76 yr (2,102 days)
326.73°
0° 10m 16.68s / day
Inclination0.6286°
5.7800°
287.51°
Physical characteristics
Dimensions8.43 km (calculated)[3]
12.201±0.545 km[4][5]
3.5327±0.0012 h[6]
0.062±0.029[4][5]
0.08 (assumed)[3]
C [3]
13.2[4] · 13.282±0.004 (R)[6] · 13.3[1] · 13.43±0.23[7] · 13.73[3]

    It was discovered by German astronomers Freimut Börngen and Lutz Schmadel at the Karl Schwarzschild Observatory in Tautenburg, eastern Germany, on 12 October 1990.[8] The asteroid was named after Swiss physiologist and biochemist Emil Abderhalden.[2]

    Orbit and classification

    Abderhalden is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.8–3.7 AU once every 5 years and 9 months (2,102 days). Its orbit has an eccentricity of 0.14 and an inclination of 1° with respect to the ecliptic.[1] The first precovery was obtained at Crimea–Nauchnij in 1978, extending the asteroid's observation arc by 12 years prior to its discovery.[8]

    Physical characteristics

    Rotation period

    In October 2013, a rotational lightcurve of Abderhalden was obtained from photometric observation taken by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.5327 hours with a brightness variation of 0.21 magnitude (U=2).[6]

    Diameter and albedo

    The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08, a standard albedo for carbonaceous asteroids of the Themis family, and calculates a diameter of 8.4 kilometers,[3] while the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer finds an albedo of 0.062 with a corresponding diameter of 12.2 kilometers and an absolute magnitude of 13.2.[4]

    Naming

    This minor planet was named in memory of Swiss biochemist and physiologist Emil Abderhalden (1877–1950). He was a researcher in the field of physiological chemistry, founder of modern dietetics, and promoter of public welfare. Abderhalden taught physiology at the Martin Luther University of Halle-Wittenberg from 1911 until the end of World War II.[2] The approved naming citation was published by the Minor Planet Center on 13 October 2000 (M.P.C. 41387).[9]

    References
    1. "JPL Small-Body Database Browser: 15262 Abderhalden (1990 TG4)" (2017-06-02 last obs.). Jet Propulsion Laboratory. Retrieved 26 June 2017.
    2. Schmadel, Lutz D. (2007). "(15262) Abderhalden". Dictionary of Minor Planet Names – (15262) Abderhalden. Springer Berlin Heidelberg. p. 822. doi:10.1007/978-3-540-29925-7_9115. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (15262) Abderhalden". Asteroid Lightcurve Database (LCDB). Retrieved 26 April 2016.
    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 26 April 2016.
    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. Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 26 April 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 26 April 2016.
    8. "15262 Abderhalden (1990 TG4)". Minor Planet Center. Retrieved 26 April 2016.
    9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 26 April 2016.

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