Magnitude to luminance conversions and visual brightness of the night sky

  title={Magnitude to luminance conversions and visual brightness of the night sky},
  author={Salvador Bar'a and Martin Aub'e and John C. Barentine and Jaime Zamorano},
  journal={Monthly Notices of the Royal Astronomical Society},
The visual brightness of the night sky is not a single-valued function of its brightness in other photometric bands, because the transformations between photometric systems depend on the spectral power distribution of the skyglow. We analyse the transformation between the night sky brightness in the Johnson–Cousins V band (mV, measured in magnitudes per square arcsecond, mpsas) and its visual luminance (L, in SI units cd m−2) for observers with photopic and scotopic adaptation, in terms of… 

Figures and Tables from this paper

Can we illuminate our cities and (still) see the stars?
Could we enjoy starry skies in our cities again? Arguably yes. The actual number of visible stars will depend, among other factors, on the spatial density of the overall city light emissions. In this
An enhanced version of the Gaia map of the brightness of the natural sky
The GAia Map of the Brightness Of the Natural Sky (GAMBONS) is a model to map the natural night brightness of the sky in cloudless and moonless nights. It computes the star radiance from the
The growing threat of light pollution to ground-based observatories
Human activity is rapidly increasing the negative impact of artificial skyglow at even the most remote professional observatory sites. Assessment of the actual impact requires an understanding of the
Linking solar minimum, space weather, and night sky brightness
Empirical results contribute to a quantitative basis for understanding and predicting broadband night sky brightness variations and it is plausible, terrestrial night airglow and geomagnetic indices have similar responses to the solar energy input into Earth's magnetosphere.
Linking Solar Minimum, Space Weather, and Night Sky Brightness
New observations indicate previously unrecognized significant sources of night sky brightness variations, not involving corresponding changes in the Sun's EUV flux , occur during deep solar
Computing light pollution indicators for environmental assessment
Light pollution modelling and monitoring has traditionally used zenith sky brightness as its main indicator. Several other indicators (e.g. average sky radiance, horizontal irradiance, average sky
The proliferation of space objects is a rapidly increasing source of artificial night sky brightness
The population of artificial satellites and space debris orbiting the Earth imposes non-negligible constraints on both space operations and ground-based optical and radio astronomy. The ongoing
A multiband map of the natural night sky brightness including Gaia and Hipparcos integrated starlight
The natural night sky brightness is a relevant input for monitoring the light pollution evolution at observatory sites, by subtracting it from the overall sky brightness determined by direct
A linear systems approach to protect the night sky: implications for current and future regulations
It is proposed that the traditional light pollution mitigation approach shall be complemented with a top-down, ambient artificial skyglow immission limits strategy, whereby clear limits are established to the admissible deterioration of the night sky above the observatories.


Black-body luminance and magnitudes per square arcsecond in the Johnson-Cousins BVR photometric bands
  • S. Bará
  • Physics
    Photonics Letters of Poland
  • 2019
A relevant amount of light pollution studies deal with the unwanted visual effects of artificial light at night, including the anthropogenic luminance of the sky that hinders the observation of the
Commission internationale de l’éclairage (CIE)
La Commission internationale de l’eclairage (CIE) a ete fondee par la Commission internationale de photometrie lors de sa 4 e session tenue a Berlin au mois d’aout 1913, et ses premiers statuts,
Starlight: a common heritage
  • Cipriano Marín
  • Sociology
    Proceedings of the International Astronomical Union
  • 2009
Abstract The Starlight Initiative brings a new view of the night sky and of its value enhancement, claiming the access to starlight as a scientific, environmental, and cultural right of humankind.
Model for artificial night-sky illumination
A model has been constructed to allow calculation of the night-sky brightness caused by a city at its center and outside the city, and at arbitrary zenith distances. A circular city of uniform
Correlated color temperature as an explicit function of chromaticity coordinates
A simple equation to compute correlated color temperature (CCT) from CIE 1931 chromaticity coordinates x and y is given. Over the range of interest in color science, the errors are negligible. It was
A model previously constructed for night-sky brightness calculations has been modified to allow for the curvature of the earth. The model has been applied to calculate the brightness at the following