Astrometry and Photometry of the binary TNO 1998 WW31

Details Astrometry and Photometry of the binary TNO 1998 WW31 Astrometry and Photometry of the binary TNO 1998 WW31

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.9259v&link_type=abstract

HST Proposal ID #9259

Physics

Hst Proposal Id #9259

Scientific paper

The discovery that the Trans Neptunian Object {TNO} 1998 WW31 has a satellite was announced on IAU Circular 7610 {16th April 2001}. HST observations of this object would be of immense public interest. Combining images taken at separate epochs would afford an opportunity to demonstrate the immense power of Hubble in deriving the orbit and physical parameters of this system. DD time is being requested to get an initial look, and additional observations to resolve possible mirror-image ambiguities would be proposed in subsequent cycles. Since we don't yet know the optimum sampling interval to get a decent orbital solution, the DD time would enable us to prepare a better Cycle 11 proposal. We really need to get a crude orbital period first, then we will be in a good position to propose a more thorough strategy in future cycles. Hence observations made in July, August and September will greatly assist the determination of the orbital parameters and physical characteristics of this important new object. Hubble's unparalleled resolution will enable the physical characteristics of this system to be derived significantly earlier and to far better precision than using ground based observations alone. We note that this object is not a target of any accepted program for the coming cycle and that the observations we wish to perform {observations at a few epochs for refining the orbit, and at least at one epoch a good multicolor photometry for comparing the two components of the system} is not the goal of any of the programs presently accepted for Cycle 10.

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