Composition and physical properties of Enceladus' surface.
Observations of Saturn's satellite Enceladus using Cassini's Visual and Infrared Mapping Spectrometer instrument were obtained during three flybys of Enceladus in 2005. Enceladus' surface is composed mostly of nearly pure water ice except near its south pole, where there are light organics, CO2, and amorphous and crystalline water ice, particularly in the region dubbed the "tiger stripes." An upper limit of 5 precipitable nanometers is derived for CO in the atmospheric column above Enceladus, and 2% for NH3 in global surface deposits. Upper limits of 140 kelvin (for a filled pixel) are derived for the temperatures in the tiger stripes.
Brown
Robert H
RH
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.
Clark
Roger N
RN
Buratti
Bonnie J
BJ
Cruikshank
Dale P
DP
Barnes
Jason W
JW
Mastrapa
Rachel M E
RM
Bauer
J
J
Newman
S
S
Momary
T
T
Baines
K H
KH
Bellucci
G
G
Capaccioni
F
F
Cerroni
P
P
Combes
M
M
Coradini
A
A
Drossart
P
P
Formisano
V
V
Jaumann
R
R
Langevin
Y
Y
Matson
D L
DL
McCord
T B
TB
Nelson
R M
RM
Nicholson
P D
PD
Sicardy
B
B
Sotin
C
C
D000641:Ammonia / Q000032:analysis; D001272:Atmosphere; D002245:Carbon Dioxide / Q000032:analysis; D005118:Extraterrestrial Environment / Q000737:chemistry*; D007053:Ice / Q000032:analysis*; D046448:Ice Cover; D018539:Saturn; D013055:Spectrophotometry, Infrared
D007053:Ice; D002245:Carbon Dioxide; D000641:Ammonia