List of common astronomy symbols

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This is a compilation of symbols commonly used in astronomy, particularly professional astronomy.

Age (stellar)[edit]

  • τ - Age

Astrometry parameters[edit]

Astrometry Parameters

Cosmological parameters[edit]

Cosmological parameters

Distance description[edit]

Distance description for Orbital and non-Orbital Parameters:

Galaxy comparison[edit]

Galaxy type and spectral comparison:

Luminosity comparison[edit]

Luminosity comparison:

  • LS - Luminosity compared to the Sun (Sol)
  • L - Luminosity compared to the Sun (Sol)

Luminosity of certain object:

Mass comparison[edit]

Mass comparison:

  • ME - Mass compared to Earth
  • M - Mass compared to Earth
  • MJ - Mass compared to Jupiter
  • M - Mass compared to Jupiter
  • MS - Mass compared to the Sun (Sol)
  • M - Mass compared to The Sun (Sol)

Mass of certain object:

Metallicity comparison[edit]

Metallicity comparison:

  • Fe/H - Iron ratio to Hydrogen, a logarithm representation of the ratio of a star's iron abundance compared to that of the Sun
  • M/H - Metallicity ratio.
  • Z - Metallicity
  • ZS - Metallicity compared to the Sun (Sol)
  • Z - Metallicity compared to the Sun (Sol)

Orbital parameters[edit]

Orbital Parameters of a Cosmic Object:

  • α - RA, right ascension, if the Greek letter does not appear, á letter will appear.
  • δ - Dec, declination, if the Greek letter does not appear, ä letter will appear.

Radius comparison[edit]

Radius comparison:

  • RE - Radius compared to Earth
  • R - Radius compared to Earth
  • RJ - Radius compared to Jupiter
  • R - Radius compared to Jupiter
  • RS - Radius compared to The Sun (Sol)
  • R - Radius compared to The Sun (Sol)

Spectral comparison[edit]

Spectral comparison:

Temperature description[edit]

Temperature description:

  • Teff - Temperature Effect, usually associated with luminous object
  • Tmax - Temperature Maximum, usually associated with non-luminous object
  • Tavg - Temperature Average, usually associated with non-luminous object
  • Tmin - Temperature Minimum, usually associated with non-luminous object
  • K - Kelvin

References[edit]

  1. ^ Ultra-luminous X-ray sources: X-ray binaries in a high/hard state?, Z. Kuncic, R. Soria, C. K. Hung, M. C. Freeland, G. V. Bicknell, 2006

See also[edit]