Astrometric asteroid masses: a simultaneous determination
نویسندگان
چکیده
منابع مشابه
Determination of asteroid masses
The masses of the three largest asteroids: (1) Ceres, (2) Pallas and (4) Vesta were determined from gravitational perturbations exerted on respectively 25, 2, and 26 selected asteroids. These masses were calculated by means of the leastsquares method as weighted means of the values obtained separately from the perturbations on single asteroids. Special attention was paid to the selection of the...
متن کاملAsteroid Masses and Densities
Since 1989 both traditional groundbased techniques and modern spacecraft techniques have increased the number of asteroids with known masses from 4 to 24. At the same time, the shapes for 16 of these asteroids have been determined with sufficient precision to determine reliable volumes and bulk densities of these bodies. This review paper will look at the masses and densities that have been det...
متن کاملTreatment of star catalog biases in asteroid astrometric observations
In this paper, we discuss the detection of systematic biases in star positions of the USNO A1.0, A2.0, and B1.0 catalogs, as deduced from the residuals of numbered asteroid observations. We present a technique for the removal of these biases, and validate this technique by illustrating the resulting improvements in numbered asteroid residuals, and by establishing that debiased orbits predict om...
متن کاملASTROMETRIC-SPECTROSCOPIC DETERMINATION OF THE ABSOLUTE MASSES OF THE HgMn BINARY STAR φ HERCULIS
The Mercury-Manganese star φ Her is a well known spectroscopic binary that has been the subject of a recent study by Zavala et al. (2006), in which they resolved the companion using long-baseline interferometry. The total mass of the binary is now fairly well established, but the combination of the spectroscopy with the astrometry has not resulted in individual masses consistent with the spectr...
متن کاملMass determination of astrometric binaries with Hipparcos
In a previous paper (Martin et al., 1997) we have shown that for double stars with orbital periods smaller than about 25 years, it was possible to determine from the Hipparcos data, the mass ratio B of the components or the difference between the mass and intensity ratios, β−B, provided the orbital elements of the relative orbit are available. Froman extensive literature search we have selected...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2014
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201322766