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The magnetic properties can be modelled by assuming that regions with a magnetic flux of about 0.14 T randomly cover approximately 9% of the photosphere, whereas the remainder of the surface is free of magnetic fields. [88] The overall magnetic activity of Epsilon Eridani shows co-existing 2.95 ± 0.03 and 12.7 ± 0.3 year activity cycles. [84]
A state designated American Indian reservation is the land area designated by a state for state-recognized American Indian tribes who lack federal recognition.
LHS 292 is a red dwarf in the constellation Sextans.It is far too faint to be seen with the unaided eye and requires a large amateur telescope to be seen visually. It lies relatively close to the Solar System at a distance of about 14.9 light years.
A light curve for Xi Bootis, showing the average of the b and y magnitudes as a function of time. Adapted from Lockwood et al. (2007) [11]. The primary star in this system is a BY Draconis variable with an apparent magnitude that varies from +4.52 to +4.67 with a period just over 10 days long, and is classified as a G-type main-sequence star.
17α-Estradiol (also known as 17α-E2, 17-epiestradiol, alfatradiol, or estra-1,3,5(10)-triene-3,17α-diol) is a minor and weak endogenous steroidal estrogen that is related to 17β-estradiol (better known simply as estradiol). [2]
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