Xref: utzoo sci.astro:3132 sci.space:8547 comp.graphics:3749 Path: utzoo!utgpu!watmath!clyde!att!pacbell!ames!amdahl!pyramid!leadsv!esl!rww From: rww@esl.UUCP (Richard W. Webb) Newsgroups: sci.astro,sci.space,comp.graphics Subject: STARS and color Summary: What colors are they? Keywords: stars, spectral class, color Message-ID: <797@esl.UUCP> Date: 28 Nov 88 23:40:09 GMT References: <1287@cfa.cfa.harvard.EDU] <17459@agate.BERKELEY.EDU> Reply-To: rww@esl.UUCP (Richard W. Webb) Organization: ESL, Inc., Sunnyvale, CA. Lines: 28 Greeting, Greeting, Star Buffs, We all know about the Main Sequence, and how different stars have different colors. What I would like to know is this: What RGB (red, green, blue) intensity values should I use for a star of a given spectral class? O stars are "blue-white" while M stars are "reddish." I would like to be a bit more precise than this. Possibly, I could guess at a mapping from spectral class to temperature, and then use the blackbody color curve (CIE chromaticity as a function of temperature) to produce a color for each spectral type. I would much rather lookup in a table the RGB values for each spectral type. If anyone has done something like this and can send me a table like this, I would greatly appreciate it. However, any pointers or references to similar material would also be appreciated. Please Email, I will post a summary of the responses. I am doing this for my own modification to the "starchart" program that was made available a few months ago. Thank you very much for any help you can provide. -- Richard W. Webb ecvax!decwrl!borealis!\ ESL Inc. MS/302 sdcsvax!seismo!- ames!esl!rww 495 Java Drive (408) 738-2888 x5729 ucbcad!ucbvax!/ / Sunnyvale, CA 94088 SMAIL: rww@esl.ESL.COM ihnp4!lll-lcc!