Minor Planets. III. Lightcurves of a Trojan Asteroid

Dunlap, J. L.; Gehrels, T.

doi:10.1086/110860

Cited by 63 publications

(39 citation statements)

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“…Region B contains objects that are likely to be rotationally elongated. Only binaries are expected in region C. Dunlap & Gehrels (1969). Note the similarities between the light curves of (29314), (17365), and 624 Hektor.…”

Section: Candidate Contact Binary Asteroidsmentioning

confidence: 88%

Fraction of Contact Binary Trojan Asteroids

2007

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We present the results of an optical light-curve survey of 114 Jovian Trojan asteroids conducted to determine the fraction of contact binaries. Sparse sampling was used to assess the photometric range of the asteroids, and those showing the largest ranges were targeted for detailed follow-up observations. This survey led to the discovery of two Trojan asteroids, (17365) and (29314), displaying large light-curve ranges ($1 mag) and long rotation periods (<2 rotations day À1 ) consistent with a contact binary nature. The optical light curves of both asteroids are well matched by Roche binary equilibrium models. Using these binary models, we find low densities of $600 and 800 kg m À3 , suggestive of porous interiors. The fraction of contact binaries is estimated to be between 6% and 10%, comparable to the fraction in the Kuiper Belt. The total binary fraction in the Trojan clouds (including both wide and close pairs) must be higher.

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Section: Candidate Contact Binary Asteroidsmentioning

confidence: 88%

Fraction of Contact Binary Trojan Asteroids

2007

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“…A more realistic uncertainty of G, taking into account the possible systematic errors due to absolute calibration errors in the datasets taken at the different observatories, as well as possible minor aspect changes during the observational interval, is likely a few times greater. Therefore, 0.1 is a more realistic uncertainty of the derived Dunlap and Gehrels (1969). b Degewij and Van Houten (1979).…”

Section: Color Indices and Phase Slope Parametermentioning

confidence: 99%

Physical characteristics of Comet Nucleus C/2001 OG108 (LONEOS)

Abell¹,

Fernández²,

Pravec³

et al. 2005

Icarus

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“…Laboratory measurements of asteroid models started with experiments carried out by Dunlap (1971). More detailed laboratory studies of asteroid models were accomplished more than ten years later by the System for Asteroid Models (SAM) at the Teramo Observatory, Italy D'Ambrosio et al 1985), with a computerized system that allowed rotation and tilting of the model and a wide phase angle region.…”

Section: Introductionmentioning

confidence: 99%

Ground reference for space remote sensing

Kaasalainen¹,

Kaasalainen²,

Piironen³

2005

A&A

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Abstract. We present accurate laboratory CCD photometry of an artificial asteroid sample. The standard inversion method for asteroid lightcurves was implemented to reproduce the measured lightcurves and to derive the global shape, spin state and pole direction to be compared with the known laboratory values. The results imply that the inversion analysis works universally for targets of arbitrary surface composition, i.e., the scattering law does not play a strong role in the analysis. We further investigated the scattering behaviour of the surface material by direct laboratory measurements, and found that the illumination phase angle dependence can be factorized for this material in the same way as for asteroids.

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Minor Planets. III. Lightcurves of a Trojan Asteroid

Cited by 63 publications

References 0 publications

Fraction of Contact Binary Trojan Asteroids

Fraction of Contact Binary Trojan Asteroids

Physical characteristics of Comet Nucleus C/2001 OG108 (LONEOS)

Ground reference for space remote sensing

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