Amateur Sun Spots

Discussion in 'Ham Radio Discussions' started by VK4HAT, Oct 16, 2020.

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  1. VK4HAT

    VK4HAT Ham Member QRZ Page

    have a go at this bad boy

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  2. NL7W

    NL7W Ham Member QRZ Page

    Don't mean to burst anyone's bubble, but...

    The latest N0NBH report places the SFI
    back down to a relatively quiescent value
    of 71 ... with a K-index of 4.

    Most Recent.JPG

    Good luck!!! ;):rolleyes::cool:
    Last edited: Oct 24, 2020
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  3. M0YRX

    M0YRX Ham Member QRZ Page

    Untitled (2).png There are three other areas with faint small Sunspots atm by the latest SDO/NASA images both leading and trailing AR12778 and one area in the NW, it remains to be seen if these will hang about and grow to get classified though.
    Last edited: Oct 26, 2020
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  4. W4NNF

    W4NNF XML Subscriber QRZ Page

    Amateur astronomers did observe the Sun in white light for many years, but, yeah, it's really only been the last 20 years they've had access to affordable hydrogen alpha filters that let you see the fun stuff other than sunspots like prominences. :)
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  5. N5CM

    N5CM Ham Member QRZ Page

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  6. G8ADD

    G8ADD Ham Member QRZ Page

    When I joined the local astronomical society in 1959, there was a member, Brian Manning, who made his own spectrohelioscope. Diffraction gratings big enough to be suitable for his set-up were prohibitively expensive so he made his own machine to produce diffraction gratings. You can look him up on Wiki (as Brian G W Manning) which mentions his diffraction grating ruling machine but not his spectrohelioscope. There was another amateur spectrohelioscope in the UK at that time but after sixty years I cannot remember any details other than it used oscillating slits rather than rotating prisms to scan the sun. In that year of 1959 I also joined the British Astronomical Society, and joined their very active Solar Section, making daily observations of sunspots. I ceased practical astronomy in 1972 so I don't know if solar observing fell off after that time.
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  7. KL7AJ

    KL7AJ Premium Subscriber QRZ Page

    I much prefer PROFESSIONAL sunspots.
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  8. W4NNF

    W4NNF XML Subscriber QRZ Page

    There were always people interested in the Sun...and usually sufficient interest in ALPO's (the U.S. Association of Lunar and Planetary Observers) solar section. But there is no denying that things didn't really get rolling until Coronado came out with their (relatively) inexpensive little H-A scope. :)
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  9. G8ADD

    G8ADD Ham Member QRZ Page

    True. Spectrohelioscopes were complex and well beyond the construction capabilities of most amateur astronomers, though if you could build one it would let you image the sun in any wavelength of light - think of an H-alpha filter as analogous to crystal control and a spectrohelioscope as VFO control! I remember studying the plans for one and quailing at it, telescopes I could build, but not one of those.
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  10. W4NNF

    W4NNF XML Subscriber QRZ Page

    Many, many years in the late 60s there was an issue of Sky & Telescope with the incredible spectrohelioscope a young amateur astronomer had built on the cover. I thought that was the coolest thing...but I certainly never contemplated building such a thing. ;)
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