<p>I am unable to find this information online, does anyone know of a database, book, or website that contains all of the B-band, V-band, I-band etc.... apparent magnitudes for each star?</p>
<p>Thanks for any help</p>

CC BY-SA 4.0
2023-10-03T08:49:53.880Z
This information does not exist for all stars, so you need to be a bit more specific. If you are interested in a particular star then the CDS SIMBAD catalogue will do the job (can also be queried with a list of coordinates). The Yale Bright Star Catalogue has data for the naked eye stars but not in the I band. In general all catalogues have their limitations.
ProfRob
CC BY-SA 4.0
2023-10-03T15:07:03.407Z
https://en.wikipedia.org/wiki/Color_index may or may not be helpful. I don't know if anyone has noted which catalogs contain which values. https://heasarc.gsfc.nasa.gov/W3Browse/all/hipparcos.html notes that Hipparcos has B-V and V-I, for example, and GAIA has many of these as well (https://gea.esac.esa.int/archive/documentation/GDR2/Gaia_archive/chap_datamodel/sec_dm_main_tables/ssec_dm_gaia_source.html)
Barry Carter
<spectroscopy><apparent-magnitude><raw-data>
What is a good resource for finding accurate apparent magnitudes stars in different filters?
Thanos
# What is a good resource for finding accurate apparent magnitudes stars in different filters?

(Asked by: username_0 on 2023-10-03)

I am unable to find this information online, does anyone know of a database, book, or website that contains all of the B-band, V-band, I-band etc.... apparent magnitudes for each star?

Thanks for any help

**Tags:** spectroscopy, apparent-magnitude, raw-data

> **Comments:**
> **username_1**: This information does not exist for all stars, so you need to be a bit more specific. If you are interested in a particular star then the CDS SIMBAD catalogue will do the job (can also be queried with a list of coordinates). The Yale Bright Star Catalogue has data for the naked eye stars but not in the I band. In general all catalogues have their limitations.  
> **username_2**: https://en.wikipedia.org/wiki/Color_index may or may not be helpful. I don't know if anyone has noted which catalogs contain which values. https://heasarc.gsfc.nasa.gov/W3Browse/all/hipparcos.html notes that Hipparcos has B-V and V-I, for example, and GAIA has many of these as well (https://gea.esac.esa.int/archive/documentation/GDR2/Gaia_archive/chap_datamodel/sec_dm_main_tables/ssec_dm_gaia_source.html)  

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## 0 answers

