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AAAA News and Activities 2003

Opposition Timetable
Finding Mars
Martian Features
Observing with Filters
Sketching What You See
Martian Statistics
Mars Observing Form
AAAA Mars Card

The Mars Year - 2003
Mars Day on TV - KTVT CBS Channel 11, Dallas
Welcome to Wired News
Wired News: Spending Green to See Red Planet
Annular Eclipse - May 31, 2003
Lunar Eclipse - May 15, 2003
Transit of Mercury - May 7, 2003
Mid-America Astrophysics Conference

Martian Statistics

Earth and Mars Compared

  Earth Mars
Equatorial diameter (Km) 12756  6794
Density (kg/m(2)) 5517 3933
Mass (Earth=1) 1 0.107
Surface gravity (Earth=1) 1 0.38
Escape velocity (km/s) 11.2 5.03
Mean distance from sun (AU) 1 1.5236915
Mean distance from sun (miles) 9.3x10(7)  1.4136x10(8)
Mean distance from sun (10(6) Km) 149.6 227.9
Orbital period (Earth years) 1 1.88
Orbital period (Earth days) 365.24 686.95
Orbital velocity (Km/sec) 29.79 24.13
Average Surface Temperature (K)  280 210

Opposition Timetable
Finding Mars
Martian Features
Observing with Filters
Sketching What You See
Martian Statistics
Mars Observing Form
AAAA Mars Card

 NASA Photo Mars 2001.

Information about Mars at moment of closest approach on 27 Aug 2003
(Julian day number 2452878.38966)

Minimum distance between Earth and Mars

Date (UT) Time (UT) Dist (AU) Dec Elevation
2003 Aug 27 09:51 0.3727 -15 42' 173.2


Local Information
Apparent topocentric coordinates
for the epoch of date

Right ascension: 22h 39m 25.31s
Declination: -15 40' 23.4"
Constellation: Aquarius
Altitude: 45 47' 36"
Azimuth: 220 22' 14"
Rise: 19h 15m 27s
Transit:  0h 59m 35s
Set: 6h 38m 48s


Star atlas chart numbers

Herald-Bobroff Astroatlas Chart C-58
Millennium Star Atlas Charts 1355-1356 (Vol III)
Sky Atlas 2000.0 Chart 17
Uranometria 2000 Chart 302, Vol 2


Geocentric Information
Apparent geocentric coordinates for the epoch of date

Right ascension: 22h 39m 26.037s 
Declination:  -15 40' 10.72"
True distance:  0.3727386 AU (56 million km)
Horizontal parallax: 23.59"


Heliocentric Information
Ecliptic coordinates for the epoch of date

Ecliptic longitude 333 50' 48.4"
Ecliptic latitude  -1 47' 33.4"
Radius vector 1.3812397 AU (207 million km)


Physical Information

Magnitude -2.9
Phase 0.998
Phase angle 5.1
Elongation 173.0
Diameter 25.11"
Light time 0h 3m 6.0s
Centre of disk at long 299.4  lat -18.8
Position angle of the north pole 346.1
Position angle of the bright limb 138.9
The South pole is tilted towards the Earth
The South pole is sunlit
Mass 6.4191e+023 kg (0.1074 x Earth)
Mean equatorial radius 3397 km (0.5326 x Earth)
Maximum angular diameter 17.9"
Minimum geocentric distance 0.524 AU
Geometric flattening 0.006476
Sidereal rotation period 1d 0h 37m 23s
Mean density 3.94 g/cm^3
Geometric albedo 0.150


Events for Wednesday 27 Aug 2003
all times GMT

01:00  Mars transits the meridian
01:11  Pluto sets
02:29  Saturn rises
05:47  Moon rises
06:09  Jupiter rises
06:23  Sun rises
06:34  Venus rises
06:39  Mars sets
07:59  Mercury rises
09:03  Saturn transits the meridian
12:26  Moon transits the meridian
12:28  Jupiter transits the meridian
12:40  Sun transits the meridian
12:51  Venus transits the meridian
13:58  Mercury transits the meridian
15:37  Saturn sets
18:46 Jupiter sets
18:58  Sun sets
19:01  Moon sets
19:08  Venus sets
19:15  Mars rises
19:56  Mercury sets

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