Table of absolute magnitudes of stars by spectral type and …
Feb 18, 2016 · You need to combine this with something that gives absolute V magnitude along the main sequence, like that of Schmidt-Kaler (1982). An alternative, that has colours for both main sequence and pre main sequence stars (though the absolute magnitude of a PMS star is age-dependent) is found in Pecaut & Mamajek (2013).
astrophysics - Relationship between absolute magnitude of a star …
Feb 13, 2016 · You are specifically talking about absolute visual magnitude; how bright an object would appear to our eyes if the object were 10 parsecs away from us. However, you must remember that stars emit a wide spectrum of light — much of it isn't visible to the naked eye.
light - What is the difference between albedo, absolute magnitude …
Sep 27, 2021 · Absolute magnitude is a mathematical prediction based on a standardized distance and configuration (see below) so that you don't have to specify the particular conditions. Venus always has roughly the same absolute magnitude because it's always roughly the same size and albedo (see next), but varies greatly in apparent magnitude be cause of ...
Absolute magnitudes of stars - Astronomy Stack Exchange
Feb 19, 2014 · Where to find comprehensive list of absolute magnitudes for stars of different spectral types? I need published paper or web page with data and reference to the source.
Calculate the absolute magnitude for a multi-star system
Nov 2, 2020 · This formula is for the apparent magnitude, but would also apply for the absolute magnitude, which, after all, is only the apparent magnitude at $10\,\textrm{pc}$ distance. $$ M = -2.5 \log_{10} \sum_{i=1}^{n} 10^{-0.4 M_i} $$ [1] Jean Meeus, 1998, Chapter 56: Stellar Magnitudes, from Astronomical Algorithms, Willmann-Bell Inc. Second Edition.
Calculating star radius from temperature and absolute magnitude
Now though the equation seems to work fine for a star like Sirius, when I plug in the values for absolute magnitude and temperature for Barnard's star (according to wikipedia, 13.21 and 3134 K respectively) I get a radius of 0.0722. The radius provided by wikipedia is more than twice that value, at 0.196. There are many potential culprits.
absolute magnitude of an asteroid - Astronomy Stack Exchange
Aug 10, 2022 · The absolute magnitude, H , of a Solar System object is defined as the apparent magnitude of the object illuminated by the solar light flux at 1 AU and observed from the distance of 1 AU and at zero phase angle.
How to Determine Absolute Magnitude of a Galaxy using HST FITS …
Jan 12, 2024 · $\begingroup$ Ah, because in my research on how to calculate absolute magnitude of a galaxy I found that it was apparently better to use surface brightness instead as the magnitude system was made for stars. What I found online said that absolute magnitude over an area would require fairly precise measurements of the object's distance and size ...
Is there a formula for absolute magnitude that does not contain an ...
Oct 31, 2020 · To get the absolute visual magnitude then you need to subtract a bolometric correction, which to first order, depends on the temperature of the star (it also depends to second order on the composition and gravity). $$ M_V = M_{\rm bol} - BC_V\ .$$
What spectral type of star has an absolute magnitude of exactly 0?
Nov 4, 2020 · The absolute magnitude quantifies the luminosity of an object at a standard distance of $10\ \mathrm{pc}$ from Earth. For example, in the case you mentioned, Vega becomes dimmer than at its actual distance (about $7\ \mathrm{pc}$). To answer your question, I don't think there is an actual star with exactly 0 absolute magnitude.
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