File:HerefordArizonaObservatory-HAO-SouthernHorizonNotated-BruceGary.jpg

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English: Hereford Arizona Observatory

http://www.brucegary.net/HAO/

Looking south at mountains that are at 4.0 deg elevation on the meridian (vertical red line). The star Canopus (declination -52.7 deg) is transiting. Stars at declination -53 deg can be observed for more than an hour either side of transit, although the air mass would be ~ 10 for most of that time. Observations with the NIR filter would be subject to an extinction of 0.75 magnitude at this air mass. Mexico is 7 miles in this direction, so this sky is quite dark.
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Source http://www.brucegary.net/HAO/Southern%20Horizon%20Notated.jpg
Author Bruce L. Gary
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WebMaster: B. Gary. This web page is in the public domain; nothing on it is copyrighted.

This site opened: 2009.06.14. Last Update: 2017.09.23. (archived copy)

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