Constellation List
Star List
By Season
Alphabetical
Latitudes
Minneapolis, MN (45°N)
NorthPole (90°N)
Prudhoe Bay, AK (70°N)
St.Petersburg,
Russia(60°N)
Prague, C.R. (50°N)
Philadelphia, PA (40°N)
Albuquerque, NM (35°N)
New Orleans, LA (30°N)
Santiago, Cuba (20°N)
Caracas,
Venezuela (10°N)
Quito, Ecuador (0°N)
Port Moresby,
New Guinea(10°S)
Porto Alegre,
Brazil (30°S)
Montevideo,
Uruguay(35°S)
Queenstown, NZ (45°S)
South Pole (90°S)
Bibliography and Credits
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Alcor
80 Ursae Majoris
Description of the Star
Alcor is a hot, white A5V main sequence star having a luminosity about 13 times that of the sun.
The spectral type implies that Alcor has an effective temperature of 8500 K, a diameter 1.7 times that of the sun, and a mass of about 2.2 solar masses.
Alcor is a variable star of Delta Scuti type; see Caph.
The Ursa Major Cluster
According to Burnham, Alcor is part of a star cluster including at least 16 other stars from the Ursa Major area of the sky, as well as Alioth, Merak, Mizar, Phecda, and Megrez in the Big Dipper. The Ursa Major cluster represents an ellipsoidal volume of space about 30 ly long by 18 ly in width.
Other Designations For This Star
Flamsteed |
80 Ursae Majoris |
Hipparcos Identifier (HIP Number) |
65477 |
Harvard Revised (HR Number) |
5062 |
Henry Draper Catalog (HD Number) |
116842 |
Bonner Durchmusterung (BD Number) |
BD+55 1603 |
Smithsonian Astrophysical
Observatory compendium (SAO Number) |
28751 |
Fundamental Katalog (FK5 Number) |
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