Mars Global Surveyor (MGS) Derived RSS Target Descriptions TARGET_NAME = MARS PRIMARY_BODY_NAME = SUN ORBIT_DIRECTION = PROGRADE ROTATION_DIRECTION = PROGRADE TARGET_TYPE = PLANET TARGET PARAMETERS ================= A_AXIS_RADIUS : 3397.000000 TARGET_PARAMETER_UNCERTAINTY : 4. DATA_SOURCE_ID : RADIUS-PLANET B_AXIS_RADIUS : 3397.000000 TARGET_PARAMETER_UNCERTAINTY : 4. DATA_SOURCE_ID : RADIUS-PLANET C_AXIS_RADIUS : 3375.000000 TARGET_PARAMETER_UNCERTAINTY : 4. DATA_SOURCE_ID : RADIUS-PLANET FLATTENING : 0.006500 TARGET_PARAMETER_UNCERTAINTY : 0.0012 DATA_SOURCE_ID : RADIUS-PLANET MAGNETIC_MOMENT : 1200000000000.000000 TARGET_PARAMETER_UNCERTAINTY : UPPER LIMIT TARGET_PARAMETER_EPOCH : 1987 DATA_SOURCE_ID : MAGMOMENT-PLANET MASS : 641910000000000065536000.000000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989 DATA_SOURCE_ID : PHYSICAL-PLANET MASS_DENSITY : 3.940000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989 DATA_SOURCE_ID : PHYSICAL-PLANET MAXIMUM_SURFACE_PRESSURE : 0.010000 MINIMUM_SURFACE_TEMPERATURE : 148.000000 MAXIMUM_SURFACE_TEMPERATURE : 310.000000 MEAN_SURFACE_TEMPERATURE : 220.000000 EQUATORIAL_RADIUS : 3397.000000 TARGET_PARAMETER_UNCERTAINTY : 4. DATA_SOURCE_ID : RADIUS-PLANET MEAN_RADIUS : 3390.000000 TARGET_PARAMETER_UNCERTAINTY : 4. DATA_SOURCE_ID : RADIUS-PLANET SURFACE_GRAVITY : 3.720000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989 DATA_SOURCE_ID : SURFGRAV-PLANET REVOLUTION_PERIOD : 687.000000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989-02-03 DATA_SOURCE_ID : REVPER-PLANET POLE_RIGHT_ASCENSION : 317.600000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989 DATA_SOURCE_ID : ROTATION-PLANET POLE_DECLINATION : 52.900000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989 DATA_SOURCE_ID : ROTATION-PLANET SIDEREAL_ROTATION_PERIOD : 1.020000 TARGET_PARAMETER_UNCERTAINTY : UNK DATA_SOURCE_ID : PHYSICAL-PLANET MEAN_SOLAR_DAY : 1.020000 TARGET_PARAMETER_UNCERTAINTY : UNK DATA_SOURCE_ID : MEANSOLARDAY-PLANET OBLIQUITY : 25.200000 TARGET_PARAMETER_UNCERTAINTY : UNK DATA_SOURCE_ID : PHYSICAL-PLANET ORBITAL_ECCENTRICITY : 0.093000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989-02-03 DATA_SOURCE_ID : ELEMENTS-PLANET ORBITAL_INCLINATION : 1.800000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989-02-03 DATA_SOURCE_ID : ELEMENTS-PLANET ORBITAL_SEMIMAJOR_AXIS : 227955604.000000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989-02-03 DATA_SOURCE_ID : ORBSEMIMAJAX-PLANET ASCENDING_NODE_LONGITUDE : 49.600000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989-02-03 DATA_SOURCE_ID : ELEMENTS-PLANET PERIAPSIS_ARGUMENT_ANGLE : 286.400000 TARGET_PARAMETER_UNCERTAINTY : UNK TARGET_PARAMETER_EPOCH : 1989-02-03 DATA_SOURCE_ID : PERIARGANG-PLANET Data Source Descriptions ======================== ELEMENTS-PLANET The 1989 Astronomical Almanac, page E3. MAGMOMENT-PLANET C.T. RUSSELL, CH. 5 IN GEOMAGNETISM, VOL. 2 (ACADEMIC PRESS) MEANSOLARDAY-PLANET Derived from three other target constants catalog elements: REVOLUTION_PERIOD (RP), SIDEREAL_ROTATION_PERIOD (SRP), and ROTATION_DIRECTION_TYPE (RDT) as follows: If RDT = PROGRADE, then MSD = (RP * SRP)/(RP - SRP). If RDT = RETROGRADE, then MSD = (RP * SRP)/(RP + SRP). ORBSEMIMAJAX-PLANET Derived from data from The 1989 Astronomical Almanac, converting Mean Distance on page E3 to km using the value for Unit Distance found on page K6. PERIARGANG-PLANET Derived from data from The 1989 Astronomical Almanac as LAN-LP, where LAN is the Ascending Node Longitude and LP is the Longitude of Perihelion, both from page E3. PHYSICAL-PLANET The 1989 Astronomical Almanac, page E88. The 1989 Astronomical Almanac, page K6. RADIUS-PLANET Taken or derived from REPORT OF THE IAU WORKING GROUP ON CARTOGRAPHIC COORDINATES AND ROTATIONAL ELEMENTS OF THE PLANETS AND SATELLITES, 1988 as follows: Given Mean Radius (MR), Equatorial Radius (ER), and Polar Radius (PR), then this catalog defines the following: A_AXIS_RADIUS = ER B_AXIS_RADIUS = ER C_AXIS_RADIUS = ER FLATTENING = (ER - PR)/ER REVPER-PLANET Derived from data from The 1989 Astronomical Almanac as 360/n where n is the Daily Motion from page E3. ROTATION-PLANET The 1989 Astronomical Almanac, page E87. The Astronomical Almanac, 1989, page C3. SURFGRAV-PLANET Derived from data in THE 1989 ASTRONOMICAL ALMANAC and the 1988 REPORT OF THE IAU WORKING GROUP ON CARTOGRAPHIC COORDINATES as (G * MASS)/(MR * MR) where MR is MEAN RADIUS from this catalog, MASS comes from page E88, and the gravitational constant, G, comes from page K6. TARGET_NAME = PHOBOS PRIMARY_BODY_NAME = MARS ORBIT_DIRECTION = PROGRADE ROTATION_DIRECTION = SYNCHRONOUS TARGET_TYPE = SATELLITE Phobos is the first satellite of Mars. The following properties are from K.R. Lang, 'Astrophysical Data: Planets and Stars', pages 70-73: Distance from planet center: 9.37e03 km 2.76 planet radii Orbital period: 0.3189 days Eccentricity: 0.0150 degrees Inclination: 1.1 degrees Radius: 14 x 10 km Mass: 9.6e-5 1.e23 grams Density: <= 2 grams/cm^3 Visual Magnitude at Opposition: 11.6 at Unit Distance: +11.9 Geometric Visual Albedo: 0.06" TARGET_NAME = DEIMOS PRIMARY_BODY_NAME = MARS TARGET_TYPE = "SATELLITE ORBIT_DIRECTION = PROGRADE ROTATION_DIRECTION = SYNCHRONOUS Deimos is the second satellite of Mars. The following properties are from K.R. Lang, 'Astrophysical Data: Planets and Stars', pages 70-73: Distance from planet center: 23.52e03 km 6.90 planet radii Orbital period: 1.262 days Eccentricity: 0.0008 degrees Inclination: 0.9 to 2.7 degrees (variable) Radius: 8 x 6 km Mass: 2.0e-5 1.e23 grams Density: <= 2 grams/cm^3 Visual Magnitude at Opposition: 12.7 at Unit Distance: +13.0 Geometric Visual Albedo: 0.07