A Note On Calculating Apparent Magnitudes
The brightness of an object varies as the inverse square of the distance. The apparent magnitude scale varies as −2.5 times the (base-10) logarithm of the brightness. Thus if an object has apparent magnitude at distance from the observer, then all other things being equal, it will have magnitude at distance .
Read more about this topic: Extraterrestrial Skies
Famous quotes containing the words note, calculating and/or apparent:
“A note as from a single place,
A slender tinkling fall that made
Now drops that floated on the pool
Like pearls, and now a silver blade.”
—Robert Frost (18741963)
“What our children have to fear is not the cars on the highways of tomorrow but our own pleasure in calculating the most elegant parameters of their deaths.”
—J.G. (James Graham)
“The apparent rulers of the English nation are like the imposing personages of a splendid procession: it is by them the mob are influenced; it is they whom the spectators cheer. The real rulers are secreted in second-rate carriages; no one cares for them or asks after them, but they are obeyed implicitly and unconsciously by reason of the splendour of those who eclipsed and preceded them.”
—Walter Bagehot (18261877)