On February 14, 2000, an orbit insertion burn will place NASA's Near Earth Asteroid Rendezvous (NEAR) spacecraft (S/C) into orbit around asteroid 433 Eros.

(NEAR)↗

NASA NTRS1999

Preliminary Planning for Near's Low-Altitude Operations at 433 Eros

This paper will provide preliminary plans for mission design and navigation during the last two weeks of the orbit phase, where several close passes to the surface will be incorporated to enhance the science return.

NEAR↗

NASA NTRS1999

Determination of Eros Physical Parameters for Near Earth Asteroid Rendezvous Orbit Phase Navigation

Navigation of the orbit phase of the Near Earth Asteroid Rendezbous (NEAR) mission will require determination of certain physical parameters describing the size, shape, gravity field, attitude and inertial properties of Eros.

Asteroid↗

NASA NTRS1999

Determination of Eros Physical Parameters for Near Earth Asteroid Rendezvous Orbit Phase Navigation

UNKNOWN

Asteroid↗

NASA NTRS1999

Estimating the Mass of Asteroid 433 Eros During the NEAR Spacecraft Flyby

Explore the source record for details and available documents.

mass rotation pole Eros Asteroid 433↗

NASA NTRS1999

Error Sources in Asteroid Astrometry

Asteroids astrometry, like any other scientific measurement process, is subject to both random and systematic errors, not all of which are under the observer's control.

Astrometry↗

NASA NTRS1999

Estimating the Mass of Asteroid 433 Eros During the Near Spacecraft Flyby

The terminal navigation of the Near-Earth Asteroid Rendezvous (NEAR) spacecraft during its flyby of asteroid 433 Eros on December 23, 1998 involved coordinated efforts to determine the heliocentric orbits of the spacecraft and Eros and then to determine the relative trajectory of the spacecraft with respect ot Eros.

Asteroid Near-Earth Asteroid Rendezbous (NEAR) mas↗

NASA NTRS1998

Preliminary Considerations for NEAR's Low-altitude Passes and Landing Operations at 433 Eros

NASA's Near Earth Asteroid Rendezous (NEAR) mission is currently on course for rendezous and orbit insertion about the asteroid 433 Eros in December 1998.

Near↗

NASA NTRS1998

Preliminary Considerations for NEAR's Low-Altitude Passes and Landing Operations at 433 Eros

UNKNOWN

Near↗

NASA NTRS1998

Near Earth Asteroid Rendezvous Orbit Phase Trajectory Design

Trajectory design of the orbit phase of the Near Earth Asteroid Rendezvous (NEAR) mission involves procedures that depart significantly from those used for previous missions.

Missions↗

NASA NTRS1993

Masses and Densities of Pluto and Charon

We have analyzed Hubble Space Telescope Wide Field Camera CCD images of Pluto, Charon, and a background star, obtained on seven HST visits over a 3.2 day span in August 1991, to observe Pluto's barycentric motion and to determine the individual masses and bulk densities of Pluto and Charon.

Charon/Pluto↗

NASA NTRS1991

Low temperature research facilities for shuttle and beyond

This paper describes the Low Temperature Research Facility program now under development at the Jet Propulsion Laboratory. This program will develop the experiments and cryogenic facility to fly experiments requiring temperatures in the liquid helium range, from the superfluid range (1.6 K) to the critical point (5.2 K). A shuttle facility is planned for 1998. It will be flown about every two years after that time. A free flyer is also being evaluated for the end of the decade or early in the next century. A brief discussion of the quality of micro-gravity available in various carriers is also given.

Mason, P.↗

NASA NTRS1981

The development of an 85-kW (thermal) air Brayton receiver

The results of the program from its inception through December 1980 are presented. The design requirements, concept, and significant analysis upon which the receiver is based are described. The fabrication processes that have been utilized in the construction of the prototype receivers at the test station are summarized. The test and evaluation phase at the Parabolic Dish Test Site are described.

Greevan, M.↗