2017年IOAA理论常数表
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Table of constants
Earth
| Mass ($$M_⊕$$) | 5.98 × 1024 kg |
| Radius ($$R_⊕$$) | 6.38 × 106 m |
| Acceleration of gravity ($$g$$) | 9.8 m ⋅ s−1 |
| Obliquity of Ecliptic | 23°27’ |
| Length of Tropical Year | 365.2422 mean solar days |
| Length of Sidereal Year | 365.2564 mean solar days |
| Albedo | 0.39 |
Moon
| Mass($$M_☾$$) | 7.35 × 1022 kg |
| Radius ($$R_☾$$) | 1.74 × 106 m |
| Mean distance from Earth | 3.84 × 108 m |
| Orbital inclination with the Ecliptic | 5.14° |
| Albedo | 0.14 |
| Apparent magnitude (mean full moon) | −12.74 |
Sun
| Mass ($$M_☉$$) | 1.99 × 1030 kg |
| Radius ($$R_☉$$) | 6.96 × 108 m |
| Luminosity ($$L_☉$$) | 3.83 × 1026 W |
| Absolute Magnitude ($$m_☉$$) | 4.80 mag |
| Angular diameter | 0.5 degrees |
| Rotational velocity in the Galaxy | 220 km⋅ s−1 |
| Distance from Galactic centre | 8.5 kpc |
Jupiter
| Mass | 1.89 × 1027 kg |
| Orbital semi-major axis | 5.20 au |
| Orbital period | 11.86 year |
Saturn
| Mass | 5.68 × 1026 kg |
| Orbital semi-major axis | 9.58 au |
| Orbital period | 29.45 year |
Physical constants
| 1 au | 1.50 × 1011 m |
| 1 pc | 206 265 au |
| Gravitational constant ($$G$$) | 6.67 × 10−11 N ⋅ m2⋅ kg−2 |
| Planck constant ($$h$$) | 6.62 × 10−34 J ⋅ s |
| Boltzmann constant ($$k_B$$) | 1.38 × 10−23 J ⋅ K−1 |
| Stefan-Boltzmann constant ($$σ$$) | 5.67 × 10−8 W ⋅ m−2⋅ K−4 |
| Hubble constant ($$H_0$$) | 67.8 km⋅ s−1 ⋅ Mpc−1 |
| Speed of light in vacuum ($$c$$) | 299 792 458 m ⋅ s−1 |
| Proton mass | 938.27 MeV ⋅ c−2 |
| Deuterium mass | 1875.60 MeV ⋅ c−2 |
| Neutron mass | 939.56 MeV ⋅ c−2 |
| Helium-3 mass | 2808.30 MeV ⋅ c−2 |
| Helium-4 mass | 3727.40 MeV ⋅ c−2 |
