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Appendix six
Symbols in astronomy
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LETTER/SYMBOL |
MEANING/QUANTITY |
| a |
major axis |
| b |
galactic latitude |
| e |
eccentricity |
| g |
acceleration due to gravity |
| i |
inclination |
| l |
galactic longitude |
| n |
mean motion |
| P |
period |
| Q |
aphelion |
| q |
dynamic pressure |
| q |
perihelion |
| T |
time of perihelion passage |
| a |
right ascension |
| b |
celestial latitude |
| d |
declination |
| l |
celestial longitude |
| l |
wavelenght |
| m |
proper motion |
| p |
parallax |
| W |
longitude of the ascending node |
| w |
argument of perihelion |
| v |
longitude of perihelion |
| Å |
ångström (10-¹ºm) |
| H0 |
Hubble's constant |
| 1/H0 |
Hubble time |
| q0 |
deceleration parameter |
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