T
thalion
Guest
I've had a little trouble finding more technical information on Titan online, so I decided to do a little research and post what I've found. Hopefully this will be useful for someone.<br /><br />Titan Facts<br /><br />Mass: 1.347x10^23 kg<br />Radius: 2575 km (solid body), 2775 km (inc. atmosphere)<br />Density: 1.88 x 10^3 kg/m^3<br />Hill Radius / <br />Tidal Radius: 5.2432 x 10^4 km*<br />Escape velocity<br />at surface: 2.640 km/s<br />Gravity at surface: 1.354 m/s^2 (Earth, 9.78 m/s^2)<br /><br />Semimajor axis: 1.2218 x 10^6 km<br />Eccentricity: 0.02919<br />Inclination: 0.33 deg<br />Increase of line<br />of apsides: 0.5213 deg / yr<br />Tropical period: 15.945421 d (22.577014 deg / d*)<br />Mean orbital velocity: 5.5721 km/sec*<br /><br />Geometric albedo: 0.22<br />Avg. mag. at opp.: 8.28<br />Abs. mag V (1,0): -1.28<br />B-V mag: 1.28<br />Max. elong. at mean opp.: 3' 17" (197"*) <br /><br />Atmospheric pressure at surface: 1.4953 bar<br />Atmospheric density at surface: 5.55 km/m^3 (Earth, 1.23 kg / m^3)<br />Scale height: ~20.2 km<br />Blackbody Temp.: 90 K<br />Surface Temp.: 94 K<br />Major Components: N2, Ar, CH4<br />Mean mol. weight: ~28.6 g/mol<br /><br />*Figures with asterisks were calculated. The formula for calculating the Hill Radius (or Hill Sphere) is familiar, and available from many online sites. I used<br />the following example:<br /><br />Hr = a * (m / 3(M+m)^.3333<br /><br />M = mass of larger body<br />m = mass of smaller body<br />a = semimajor axis<br /><br />More often than not, m is omitted, but it can be included if the objects are similar<br />in mass.<br /><br />References:<br /><br />Hartmann, William K. <i>Moons & Planets.</i> Fourth edition. Belmont: Wadsworth Publishing Co., 1999.<br /><br />Lodders, Katharina, and Bruce Fegley, Jr. <i>The Planetary Scientist's</i>