Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/ShepardtagR2422tp.pdf Дата изменения: Wed Jun 11 19:00:37 2008 Дата индексирования: Mon Apr 6 07:27:19 2009 Кодировка: Поисковые слова: http astrokuban.info astrokuban

Proposal Identification No.:

R2422

Date Received:

2008-May-30 13:02:35

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Planetary Radar Radar Solar System 22 Hours 2h

Continuation of Long-term Survey of Main-Belt M and X-class Asteroids.

We propose to observe two M-class asteroids,261 Prymno (new target) and 785 Zwetana (previously observed) with the S-band radar to constrain their physical properties, focusing specifically on their composition (metallic or not). Zwetana is of special interest because it shows the largest rotational variation in radar albedo of any asteroid observed, ranging from a low of 0.10 to a high of 0.60. Our previous work suggests this is not due to shape or compositional variations, but may be due to variations in regolith thickness or large-scale facets that were favorably oriented during the last encounter. Our goals for these observations are to determine (1) if Prymno has a high radar albedo or not (correlated with metallic content), and (2) to verify the previously observed large swings in radar albedo for Zwetana.

Name Michael K Shepard

Institution Bloomsburg University of Pennsylvania

E-mail mshepard@bloomu.edu

Phone 570-389-4568

Student no

Remote Observing Request

X

Observer will travel to AO Remote Observing In Absentia (instructions to operator)

Instrument Setup
S-Band radar S-band receiver

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned

2