2008A&A...483L..17M


Query : 2008A&A...483L..17M

2008A&A...483L..17M - Astronomy and Astrophysics, volume 483, L17-20 (2008/5-4)

Physical and dynamical properties of (12929) 1999 TZ1 suggest that it is a Trojan.

MOULLET A., LELLOUCH E., DORESSOUNDIRAM A., ORTIZ J.L., DUFFARD R., MORBIDELLI A., VERNAZZA P. and MORENO R.

Abstract (from CDS):

Small body (12929) 1999 TZ1 is listed by the Minor Planet Center (MPC) as a Centaur. However, its location close to the Lagrangian point L5 of Jupiter is typical of a Trojan object with large inclination. The aim of this work is to provide a global physical and dynamical characterization of this object and to reassess its classification. We obtained multi-wavelength observations with IRTF (Hawaii), OSN and IRAM-30 m (Spain), and performed a dynamical simulation of the evolution of its orbital parameters. Visible photometry monitoring shows a rotation curve with a period (if considered double-peaked) of 10.4±0.1h and an absolute R magnitude HR=9.792±0.025. Near-IR spectroscopy indicates a featureless reflectance spectra, with a low spectral slope of 7.2±0.11%/100nm. Thermal observations at 250GHz provide a 4.5σ detection with a flux of 1.22±0.27mJy. The combination of the visible and millimeter datasets, assuming a standard thermal model, leads to a geometric albedo pv=0.053+0.015–0.010 and a mean diameter of 51.5±5km. The low albedo and spectral slope measured are typical of Jupiter's Trojans, but cannot exclude a Centaur nature. However, the dynamical lifetime of the object was estimated to be longer than 1 Gy, which is unlikely for a Centaur and suggests that (12929) 1999 TZ1 is a Trojan asteroid.

Abstract Copyright:

Journal keyword(s): minor planets, asteroids - radio continuum: solar system - infrared: solar system - celestial mechanics

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2276 0
2 HD 102196 * 11 45 38.4605373072 -16 04 41.184901812   8.71 8.12     G2V 34 0
3 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 2923 2
4 PG 1633+099 HS* 16 35 24.0241690848 +09 47 49.891209036 13.215 14.205 14.396 14.481 14.609 sdB 108 0

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2023.02.04-10:46:24

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