First Spectroscopy of an Asteroid and its Satellite: {45} Eugenia and S/1998 {45} 1

Details First Spectroscopy of an Asteroid and its Satellite: {45} Eugenia and S/1998 {45} 1 First Spectroscopy of an Asteroid and its Satellite: {45} Eugenia and S/1998 {45} 1

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8578m&link_type=abstract

HST Proposal ID #8578

Physics

Optics

Hst Proposal Id #8578 Solar System

Scientific paper

We recently made the first-ever discovery of a satellite of an asteroid from the Earth, using adaptive optics {Merline et al. 1999a, 1999b}. We propose here to acquire the first separate, comparative, and simultaneous spectra of an asteroid and its satellite. We will employ the UV-capabilities and high-spatial-resolution properties of STIS to study {45}Eugenia, and its satellite, S/1998{45}1, by obtaining medium-resolution spectra over the range 2900-10300 Angstrom, using only two grating settings, on a single HST orbit. We will determine whether the spectra, and hence surface compositions, are similar or different in a parent-satellite pair, and to test hypotheses concerning satellite production mechanisms. From the orbital parameters, determined using our ground-based adaptive-optics images, we have already determined that {45}Eugenia has a surprisingly low density of 1.2 g cm^-3. We know the spectrum of Eugenia is a {Tholen} FC-type, which is similar to the common C-types, but differs by the lack of a UV-band or UV-dropoff and by subtle, but measurable differences in the spectral slope. Both the UV-region and the existence of subtle absorption features in the near-IR { 0.9 micron} are diagnostic of the specific differences between F-, C-, and {Bus'} X-class. HST spectroscopy is the only way to separate the pair, because ground-based adaptive optics is not available in the UV and cannot yet provide adequate resolution in the visible.

Affiliated with

Also associated with

No associations

Rating

First Spectroscopy of an Asteroid and its Satellite: {45} Eugenia and S/1998 {45} 1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with First Spectroscopy of an Asteroid and its Satellite: {45} Eugenia and S/1998 {45} 1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Spectroscopy of an Asteroid and its Satellite: {45} Eugenia and S/1998 {45} 1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1720231