K. S. Noll, Goddard Space Flight Center, NASA; W. M. Grundy, Lowell Observatory; H. Schlichting, University of California, Los Angeles; R. Murray-Clay, Center for Astrophysics; and S. D. Benecchi, Department of Terrestrial Magnetism, Carnegie Institution, report the detection of a binary companion to (38628) = 2000 EB_173. Observations started on May 06.02842 UT with the Wide Field Camera 3 on the Hubble Space Telescope (HST). Two dithered observations were made in each of two filters, F606W and F814W. A secondary, approximately 1.4-mag fainter than the primary, can be seen in each image located at a separation relative to the primary of -0".0875 +/- 0".0017 in R.A. and +0".0272 +/- 0".0013 in Decl. Reexamination of archival data shows evidence of the unresolved secondary in images obtained with the HST Imaging Spectrograph instrument on 2002 June 30.81257 and 2002 July 01.61459.
International Astronomical Union Circular
- Pub Date:
- July 2012