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Appendix B 47

Appendix B

Constants

Astronomical Unit = 1.4959787066 x 10

Parsec = 3.26 ly

= 3.086 x 10

Light-year = 9.46 x 10

Gravitational Constant = 6.672 x 10

-11

-1

-2

Velocity of Light = 299792458 m/s

Sidereal Year = 365.26 days

Mass of the Earth = 5.98 x 10

Radius of the Earth = 6378.160 km

at the Equator

Orbital Velocity = 30 km/sec

of the Earth

Mass of the Sun = 1.9891 x 10

Radius of the Sun = 6.96 x 10

Luminosity of the Sun = 3.90 x 10

Effective Temperature = 5780° K

of the Sun

Mass of the Moon = 7.35 x 10

Radius of the Moon = 1738 km

Radius of the Moon's = 3.84 x 10

Orbit

Sidereal Month = 27.3 days

Synodic month = 29.5 days

Distance of the Sun = 8.5 kpc

from the center of

the Galaxy

Velocity of the Sun = 220 km/sec

about the Galactic

Center

Diameter of the Galaxy = 120 kpc

Mass of the Galaxy = 7 x 10

solar masses

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 59 60

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Meade Image Processing Manual de Serviço Página 51