> ] the present observation indicates that Eris has
> ] a diameter < 2320 km -- therefore smaller than Pluto, whose
> ] diameter is > 2340 km.
> I wouldn't be so certain that Pluto is larger than 2340 km.
> There was an interesting presentation at the 2010 DPS meeting
> about a model for Pluto's troposphere that yielded a diameter
> much closer to our mutual event value near 2300 km. Unfortunately,
> their fitted diameter isn't in the abstract, and I failed to jot
> down the number presented at DPS. I do remember commenting on how
> I liked the result because of how close it was to our mutual event result.
Below various Pluto size measurements that I found in the literature and elsewhere.
I am not sure where comes from D>2340 km for Pluto in IAU #9185. Could you clarify?
Bulk Properties of Pluto and Charon
Tholen et al., 1987b. D.J. Tholen, M.W. Buie and C.E. Swift, Circumstances for Pluto-Charon mutual events in 1987. Astron. J. 93 (1987b), pp. 244–247. Full Textvia CrossRef
Tholen et al., 1987c. D.J. Tholen, M.W. Buie and C.E. Swift, Circumstances for Pluto-Charon mutual events in 1988. Astron. J. 94 (1987c), pp. 1681–1685. Full Text via CrossRef
Buie et al. 2006
"assuming a radius of 1152 +/- 10 km" (D=2304 +/- 20 km)
footnote 2: "Choosing a value for the radius of Pluto is not a simple matter. Current measurements from mutual events and stellar occultations do not completely agree, and explanations of the differences depend on the models chosen to interpret the data. Here we use the number adopted in most Pluto map-fitting projects with an error bar chosen to include the range of model values for the radius from mutual event and stellar occultation data."
Large changes in Pluto's atmosphere as revealed by recent stellar occultations
no size reported or I missed it.
Charon/Pluto Mass Ratio Obtained with HST CCD Observations in 1991 and 1993
see Table 16
Mutual event TB90 -> D=2302 +/- 12 km
Mutual event YB94 -> D= 2352 +/- 12 km
EY92 Stellar Occ -> D = 2412 /-22 km
A94 HST FOC images -> D= 2320 km
Pluto's lower atmosphere structure and methane abundance from high-resolution spectroscopy and stellar occultations
D= 2336 km
THE STRUCTURE OF PLUTO'S ATMOSPHERE FROM THE 2002 AUGUST 21 STELLAR OCCULTATION
from Buie et al. 2006
an old but interesting review
There are more of them...
--- Franck Marchis, Ph.D. -----------
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