… We have found that binary systems with a secondary-to-primary mean diameter ratio D s /D
p ⩾… Secondaries show an upper size limit of D s =0.5–1 km. Systems with D s /D p ⩽0.5 are …

Pairs of asteroids sharing similar heliocentric orbits, but not bound together, were found
recently 1 , 2 , 3 . Backward integrations of their orbits indicated that they separated gently with …

Fetal MRI is used with increasing frequency as an adjunct to ultrasound (US) in prenatal
diagnosis. In this review, we discuss the relative value of both prenatal US and MRI in …

… from f=1 to 9.5 d −1 , and there is an excess of slow rotators with f<1 d −1 . The observed … d
−1 /Myr for asteroids in our sample (ie, a median time in which the spin rate changes by 1 d −1 …

… 6a–d). It is still unknown whether blood flow abnormalities associated with different types of
focal … depict the macrocystic component of the lesion as a sharply bordered hypointensity (d). …

The present work reviews the basic methods of performing fetal magnetic resonance imaging
(MRI). Since fetal MRI differs in many respects from a postnatal study, several factors have …

We collected data on rotations and elongations of 46 secondaries of binary and triple systems
among near-Earth, Mars-crossing and small main belt asteroids. 24 were found or are …

We studied a sample of 93 asteroid pairs, ie, pairs of genetically related asteroids that are
on highly similar heliocentric orbits. We estimated times elapsed since separation of pair …

We observed ten M- and X-class main-belt asteroids with the Arecibo Observatory's S-band (12.6
cm) radar. The X-class asteroids were targeted based on their albedos or other …

Basaltic V-type asteroids are common in the inner part of the Main Asteroid Belt and much
less abundant in the mid and outer parts. They are of scientific interest because they sample …