منابع مشابه
Binary Minor Planets
A review of observations and theories regarding binary asteroids and binary transNeptunian objects [collectively, binary minor planets (BMPs)] is presented. To date, these objects have been discovered using a combination of direct imaging, lightcurve analysis, and radar. They are found throughout the Solar System, and present a challenge for theorists modeling their formation in the context of ...
متن کاملInfrared Signatures of Disrupted Minor Planets at White Dwarfs
Spitzer Space Observatory IRAC and MIPS photometric observations are presented for 20 white dwarfs with Teff . 20, 000 K and metal-contaminated photospheres. A warm circumstellar disk is detected at GD 16 and likely at PG 1457−086, while the remaining targets fail to reveal mid-infrared excess typical of dust disks, including a number of heavily polluted stars. Extending previous studies, over ...
متن کاملPhotocentre displacement of minor planets: analysis of Hipparcos astrometry
We present a study of the phase effect (or photocentre offset) on the astrometry of minor planets. Analysis of the high precision Hipparcos observations of the largest asteroids shows the validity of the model. Minor planets Ceres, Pallas, Vesta and Iris show a brightness distribution close to the lunar scattering properties, while Juno and Hebe are found to be more uniformly bright objects. Fo...
متن کاملCCD photometry and new models of 5 minor planets
We present new R filtered CCD observations of 5 faint and moderately faint asteroids carried out between October, 1998 and January, 1999. The achieved accuracy is between 0.01–0.03 mag, depending mainly on the target brightness. The obtained sinodic periods and amplitudes: 683 Lanzia – 4. h6±0. 2, 0.13 mag; 725 Amanda – > 3. 0, ≥0.40 mag; 852 Wladilena – 4. h62±0. 01, 0.32 mag (December, 1998) ...
متن کاملUtilizing Minor Planets to Assess the Gravitational Field in the Outer Solar System
The twin Pioneer spacecraft have been tracked for over thirty years as they headed out of the solar system. After passing a heliocentric distance of 20 AU, both exhibited a systematic error in their trajectories that can be interpreted as a constant acceleration towards the sun and that has come to be known as the Pioneer Effect. Spacecraft systematics are its most likely explanation, but there...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1956
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/116.2.218a