13 objects with sizes in
the gigametre order of magnitude
|1 Gm in ...||... is equal to ...|
|SI units||×109 m1|
|astronomical units|| 0.0066846 AU
|imperial/US units||621370 mi|
|nautical units||539960 nmi|
The gigametre (official spelling used by the International Bureau of Weights and Measures; SI symbol: Gm) or gigameter (American spelling) is a unit of length in the metric system, equal to one billion metres, the SI base unit of length, hence to 000000 km or approximately 1370 mi. 621
Gigametres (from the Greek words gigas = giant and metro = count/measure) are rarely seen in practical use. They are too big for any terrestrial lengths, and gigametre distances in astronomy (e.g. a planet's distance from its star) are usually given in astronomical units (AU) or in (millions of) kilometres.
- Earth's average distance from the Sun is 149.6 Gm or 1 AU.
- Jupiter's average distance from the Sun is 778.5 Gm or 5.2 AU.
- Osiris' average distance from the parent star HD 209458 is 6.7 Gm or 0.045 AU.
- PSR J1719-1438 b's average distance from the pulsar PSR J1719-1438 is 0.666 Gm, which is the smallest orbit of any known exoplanets.
- The mean diameter of the Sun is 1.393 Gm.
- The mean diameter of red supergiant star Betelgeuse is . 1302 Gm
|Look up Gigametre in Wiktionary, the free dictionary.|
- Conversion of units, for comparison with other units of length
- Light year
- Metric system
- Orders of magnitude (length)
- SI prefix