Encyclopedia > HDE

Article Content

HDE

The Henry Draper catalogue Extension is an extension to the famous Henry Draper Catalogue, a collection of positional and spectroscopic data about hundreds of thousands of stars.

It can be recognized by the prefix HDE, followed by a number indicating the star's position in the catalogue.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Holtsville, New York

... of 2000, there are 17,006 people, 5,316 households, and 4,454 families residing in the town. The population density is 943.4/km² (2,444.3/mi²). There are ...