Color index
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. The smaller the color index, the more blue (or hotter) the object is. Conversely, the larger the color index, the more red (or cooler) the object is. This is a consequence of the logarithmic magnitude scale, in which brighter objects have smaller (more negative) magnitudes than dimmer ones. For comparison, the yellowish Sun has a B−V index of 0.656 ± 0.005, whereas the bluish Rigel has a B−V of −0.03 (its B magnitude is 0.09 and its V magnitude is 0.12, B−V = −0.03). Traditionally, the color index uses Vega as a zero point.
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(119070)_2001_KP77(84522)_2002_TC302(91133) 1998 HK151119 Tauri1998 KY262I/Borisov2MASS J03480772−60222702MASS J0523−1403Ananke (moon)Ananke groupAndromeda GalaxyArcturusAsteroid spectral typesAsteroseismologyB-V ColourB-V colorB-V colourB-vBackyard WorldsBetelgeuseBlack bodyB−V colorB−V colourCanopusCapellaCarme groupCentaur (small Solar System body)Charles Morse HufferChi PuppisChromaticityColor (disambiguation)Color IndexColor indicesColor–color diagramColour IndexColour indexColour indicesDelta2 Canis MinorisDelta CepheiDelta Scuti variable
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Color index
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. The smaller the color index, the more blue (or hotter) the object is. Conversely, the larger the color index, the more red (or cooler) the object is. This is a consequence of the logarithmic magnitude scale, in which brighter objects have smaller (more negative) magnitudes than dimmer ones. For comparison, the yellowish Sun has a B−V index of 0.656 ± 0.005, whereas the bluish Rigel has a B−V of −0.03 (its B magnitude is 0.09 and its V magnitude is 0.12, B−V = −0.03). Traditionally, the color index uses Vega as a zero point.
has abstract
Barevný index je v astronomii ...... orný, při chladnějších kladný.
@cs
Dalam astronomi, indeks warna ...... s, dan R-I untuk objek dingin.
@in
En astronomia, l'índex de colo ...... calents, i R-I pels més freds.
@ca
En astronomie, l'indice de cou ...... sible, soit autour de 540 nm).
@fr
Färgindex är inom astronomin e ...... kt och R-I för kallare objekt.
@sv
In astronomia, si dice indice ...... iltri (o bande) di una stella.
@it
In astronomy, the color index ...... bjects, and R−I for cool ones.
@en
In de astronomie is een kleuri ...... ,33 en van een M5V ster +1,40.
@nl
Wskaźnik barwy – różnica wyraż ...... j stosuje się wskaźnik E(B-V).
@pl
Στην αστρονομία ο δείκτης χρώμ ...... (ερυθρούς και φαιούς νάνους).
@el
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Barevný index je v astronomii ...... orný, při chladnějších kladný.
@cs
Dalam astronomi, indeks warna ...... skala getaran logaritmik, yang
@in
En astronomia, l'índex de colo ...... lla no afectat per l'extinció.
@ca
En astronomie, l'indice de cou ...... sible, soit autour de 540 nm).
@fr
Färgindex är inom astronomin e ...... e objekt. Till exempel har den
@sv
In astronomia, si dice indice ...... iltri (o bande) di una stella.
@it
In astronomy, the color index ...... dex uses Vega as a zero point.
@en
In de astronomie is een kleuri ...... axmethode kan gebruikt worden.
@nl
Wskaźnik barwy – różnica wyraż ...... ch niebieskiej i żółtej (B-V).
@pl
Στην αστρονομία ο δείκτης χρώμ ...... κυανός γίγαντας Ρίγκελ έχει B−
@el
label
Barevný index
@cs
Color index
@en
Farbindex
@de
Färgindex
@sv
Indeks warna
@in
Indice de couleur
@fr
Indice di colore
@it
Kleurindex
@nl
Wskaźnik barwy
@pl
Índex de color
@ca