Mercury's Atmosphere from Mariner 10: Preliminary Results

  title={Mercury's Atmosphere from Mariner 10: Preliminary Results},
  author={A. Broadfoot and S. Kumar and M. Belton and M. McElroy},
  pages={166 - 169}
Analysis of data obtained by the ultraviolet experiment on Mariner 10 indicates that Mercury is surrounded by a thin atmosphere consisting in part of helium. The partial pressure of helium at the terminator is about 5 x 10-12 millibar. The total surface pressure of the atmosphere is less than about 2 x 10-9 millibar. Upper limits are set for the abundance of various gases, including hydrogen, oxygen, carbon, argon, neon, and xenon. The wavelength dependence of Mercury's surface albedo is… Expand
Mercury's atmosphere - A perspective after Mariner 10
Abstract Measurements made during the Mariner 10 flybys of Mercury have shown that this planet has a tenuous atmosphere, somewhat similar to that of the Moon, which consists of at least helium andExpand
Mercury's helium exosphere after Mariner 10's third encounter
From Mariner 10 third encounter UV data, a value of .00045 was calculated as the fraction of the solar wind He++ flux intercepted and captured by Mercury's magnetosphere if the observed He atmosphereExpand
Mariner 10 - Mercury atmosphere
Reduction of data from the three Mariner 10 encounters to this date have allowed identification of helium and hydrogen as atmospheric constituents. Subsolar point densities are estimated at 4500 cm−3Expand
The occultation of Mariner 10 by Mercury
Abstract An analysis of the Mariner 10 dual frequency radio occultation recordings has yielded new information on the radius and atmosphere of Mercury. The ingress measurements which were conductedExpand
Mercury's exosphere origins and relations to its magnetosphere and surface
Abstract Mariner 10, the only spacecraft that ever passed close to Mercury, revealed several unexpected characteristics: an intrinsic magnetosphere, the highest mean density of any Solar SystemExpand
Mercury ’ s exosphere origins and relations to its magnetosphere and surface
Mariner 10, the only spacecraft that ever passed close to Mercury, revealed several unexpected characteristics: an intrinsic magnetosphere, the highest mean density of any Solar System terrestrialExpand
Study of planetary atmospheres by absorptive occultations
As a spacecraft observes the setting or rising of the Sun or a star behind the limb of a planet, the absorption spectrum of the upper atmosphere can be observed as a function of height. This powerfulExpand
Monte-Carlo simulation of Mercury's exosphere
Abstract Because of its proximity to the Sun and its small size, Mercury has not been able to retain its atmosphere and only a thin exosphere surrounds the planet. The exospheric pressure at theExpand
MERCURY In-flight calibration of the PHEBUS UV instrument and Monte Carlo modelling of the hydrogen exosphere
A unique feature of Mercury's space environment is its strongly coupled surface-exosphere-magnetosphere-solar wind system, which can be remotely monitored by space missions such as Mariner 10,Expand
Investigation of local time dependence of Mercury's sodium exosphere based on a numerical simulation
Abstract Mercury has a surface-bounded exosphere (SBE) similar to that of the Moon. One of the atmospheric species, sodium, was found by ground-based observations to be the most prominent component.Expand


Ultraviolet Observations of Venus from Mariner 10: Preliminary Results
There is evidence for intense air-glow emission at wavelengths longward of 1350 angstroms; the nature of this emission is unclear, but the radiation is spatially extensive and detectable on both day and night sides of the planet. Expand
Preliminary Infrared Radiometry of the Night Side of Mercury from Mariner 10
The infrared radiometer on Mariner 10 measured the thermal emission from the planet with a spatial resolution element as small as 40 kilometers in a broad wavelength band centered at 45 micrometers, implying the presence of regions having thermal inertia as high as 0.003 cal cm-2 sec-� �K-1. Expand
A new upper limit for an atmosphere of CO2, CO on Mercury
High-resolution infrared spectra of Mercury (1.9-2.7 microns, resolution limit 0.134 wavelength/cm) obtained with the original 'Connes' interferometer at the Steward Observatory 90-inch telescopeExpand
Planetary ultraviolet spectroscopy.
  • C. Barth
  • Materials Science, Medicine
  • Applied optics
  • 1969
Ultraviolet spectroscopy can determine if the atoms and molecules basic to life are present in a planetary atmosphere: in particular, molecular nitrogen and the photodissociation products of water vapor. Expand
A Search for Far-Ultraviolet Emissions from the Lunar Atmosphere
An ultraviolet spectrometer aboard the Apollo 17 orbiting spacecraft attempted to measure ultraviolet emissions from the lunar atmosphere. The only emissions observed were from a transient atmosphereExpand
Mercury: Surface Composition from the Reflection Spectrum
The reflection spectrum for the integral disk of the planet Mercury was measured and was found to have a constant positive slope from 0.32 to 1.05 micrometers, except for absorption features in theExpand
Mercury - Interpretation of optical observations.
Abstract The spectral reflectivity of Mercury has constant positive slope from 0.32 to 1.05 μm, except for the possibility of an absorption feature in the infrared. The reflectivity curve matchesExpand
Stuart and the Electronics Laboratory at Kitt Peak National Observatory in construction of the instrument
  • 1974
Techniques of Vacuutm Ultraviolet Spectroscopy (Wiley
  • New York,
  • 1967