Optical - HST WFPC2 PC CCD 0.07” resolution
Subtract an extrapolated dust coma from central pixels
• Weaver et al. (1997) - Early rough radius ~15-20 km
• Lamy et al. (1998) & Sekanina (1998)
(Nucleus + Dust coma power law) * PSF
Several images => 30 - 40 km radius (albedo = 4%)
Long Wavelength
Thermal IR ~ 35 km ISOCAM Lamy et al. (1998)
IRTF Fernandez et al. (1998a)
Radio ~20-25 km IRAM [1.3 & 2.6 mm] Wink et al. (1998) OVRO [1.3 & 2.85 mm] Blake et al. (1998)
VLA [3.65cm] Fernandez et al. (1998a)
Occultation ~ 22 - 44 km (Fernandez et al. 1998b) *(See review by Weaver & Lamy 1998)
Nucleus Size
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