B, V, and R Band Photometry of Trans-Neptunian Objects and Centaur Objects

Details B, V, and R Band Photometry of Trans-Neptunian Objects and Centaur Objects B, V, and R Band Photometry of Trans-Neptunian Objects and Centaur Objects

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.0703t&link_type=abstract

American Astronomical Society, DPS meeting #28, #07.03; Bulletin of the American Astronomical Society, Vol. 28, p.1081

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a progress report on our program at the Steward Observatory 2.3-m Telescope on Kitt Peak, Arizona to carry out B, V, and R band photometry of Trans-Neptunian Objects (TNOs) and Centaur Objects. The goal of our program is to answer the following first order questions: (1) Is there color diversity and hence surface composition diversity among TNOs? (2) What is the mechanism responsible for the diversity among Centaurs (and possibly TNOs)? We present B, V, and R band photometry of two TNOs (1994 TB and 1993 SC) and four Centaurs (1995 GO, 1993 HA2, 5145 Pholus, and 2060 Chiron). We find that 1994 TB, 1993 SC, 1993 HA2, and 5145 Pholus are among the reddest objects in the solar system and 1995 GO and 2060 Chiron are solar in color. In order to determine whether a diversity exists among TNOs and the nature of the mechanism responsible for the diversity among Cenaturs, we present our colors as well as colors in the literature on two diagrams: (1) a B-V vs V-R diagram and (2) a V-R vs semi-major axis diagram. We draw a number of interesting conclusions from these diagrams. However, colors are needed for many more objects before firm conclusions can be drawn. This research is sponsored by the NASA Origins of Solar Systems Program. J. L. and N. B. thank the NSF Research Experience for Undergraduates Program at Northern Arizona University.

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