E. F. Helin

A reduced estimate of the number of kilometre-sized near-Earth asteroids

D. Rabinowitz, E. F. Helin, K. J. Lawrence et al. · Nature · 2000 · 133 citations

Terrestrial Planet, Asteroid, Reduced Estimate +2

Earth-crossing asteroids - Orbital classes, collision rates with earth, and origin

E. M. Shoemaker, J. G. Williams, E. F. Helin et al. · NASA Technical Reports Server (NASA) · 1979 · 113 citations

Collision Rates, Engineering, Terrestrial Planet +11

The Near-Earth Asteroid Tracking (NEAT) Program: An Automated System for Telescope Control, Wide-Field Imaging, and Object Detection

S. H. Pravdo, D. Rabinowitz, E. F. Helin et al. · The Astronomical Journal · 1999 · 90 citations · Full text

Earth Observation, Engineering, Telescope Control +16

Hubble Space Telescope Observations of Comet P/Shoemaker-Levy 9 (1993e)

H. A. Weaver, P. D. Feldman, Michael F. A’Hearn et al. · Science · 1994 · 62 citations

Determination of iron, nickel, cobalt, calcium, chromium and manganese in stony meteorites by X-ray fluorescence

Walter Nichiporuk, A. A. Chodos, E. F. Helin et al. · Geochimica et Cosmochimica Acta · 1967 · 57 citations

Trace Element Geochemistry, Geochemistry, Chemistry +4