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Solar Analemma. This outstanding image from Alexandra Hart taken over a period of 4 years charts the midday position of the sun in the sky throughout the year. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of Earth's axis of rotation. The east–west component results from the nonuniform rate of change of the Sun's right ascension, governed by combined effects of Earth's axial tilt and orbital eccentricity.

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Today's SUN (20181007) | low activity again

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pedro
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Today's SUN (20181007) | low activity again

Post by pedro » Sun Oct 07, 2018 12:27 pm

Today's SUN (20181007) | low activity again

WEBLINK:
http://re.apaaweb.com/sun_h_alpha_2018-10.html

A very slow sun

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IMAGING SETUPS

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SUN (20181007) H-alpha DISK & PROMS (08:30 UTC). LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4

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SUN (20181007) H-alpha DISK & PROMS (08:30 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4

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SUN (20181007) H-alpha DISK & PROMS (08:30 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-

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SUN (20181007) CaK PROMS (08:30 UTC). TV101 F/5.4, LUNT 1200 CaK Module, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20181007) WL, CaK & H-alpha (08:30 UTC). TV101 F/5.4, LUNT 1200 CaK Module, SM60, BF30, PGR GRASSHOPPE 3 GS3-U3-28S4M

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marktownley
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Re: Today's SUN (20181007) | low activity again

Post by marktownley » Sun Oct 07, 2018 1:13 pm

Great shots Pedro! You're one of only a few people who seem to be getting sunshine lately. Nice proms in the Ha!
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