News Release Archive:

News Release 589 of 1051

May 15, 2003 09:00 AM (EDT)

News Release Number: STScI-2003-17

Brighter Neptune Suggests a Planetary Change of Seasons

Technical facts about this news release:

About the Object
Object Name: Neptune
Object Description: Planet
Distance: The semi-major axis of Neptune's orbit about the Sun is 30.06 Astronomical Units (A.U.) or roughly 4.5 billion km.
Dimensions: The planet has a diameter of roughly 30,800 miles (49,600 km) at the equator.
About the Data
Data Description: These data are from HST proposals 6650, 7324 and 9393. The science team includes L. A. Sromovsky, P. M. Fry, and S. S. Limaye (University of Wisconsin-Madison's Space Science and Engineering Center), and K. Baines (JPL).
Instrument: WFPC2
Exposure Date(s): August 13/14, 1996; August 11/12, 1998, August 9/10, 2002
Filters: F467M (Strömgren b ), F673N ([S II]), and F850LP (9650Å)
About the Image
Image Credit: NASA, L. Sromovsky and P. Fry (University of Wisconsin–Madison)
Release Date: May 15, 2003