British Astronomical Association

Supporting amateur astronomers since 1890

Mr Jack Martin

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Viewing 20 posts - 81 through 100 (of 227 total)
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  • 29 June 2020 at 8:16 pm in reply to: C14 mirror flop #582704
    Mr Jack Martin
    Participant

    David,

    These bolts were not supplied with my previously owned C14.

    I just have the 2 transport locking bolts 1″ long.

    Rother Valley optics cannot obtain these accessories. I will try 365 Astronomy.

    Regards,

    Jack  

    28 June 2020 at 6:13 pm in reply to: To do or not ? #582698
    Mr Jack Martin
    Participant

    Thank you all for your responses which filter(s) do you recommend and from where ?

    Regards,

    Jack

    25 June 2020 at 10:06 am in reply to: C14 mirror flop #582683
    Mr Jack Martin
    Participant

    Peter and Daryl,

    Thanks for your replies.

    Jack

    29 May 2020 at 9:08 am in reply to: Will Hay Appreciation Society Astro T shirt #582508
    Mr Jack Martin
    Participant

    Martin,

    I looked through his note book at the RAS some years ago, saw the drawing and notes on his discovery of the great white spot on Saturn. A very accomplished amateur astronomer.

    Regards,

    Jack

    9 May 2020 at 12:36 pm in reply to: Did you know ! #582423
    Mr Jack Martin
    Participant

    Ray,

    Its got nothing to do with PC.

    Not sure where you get that idea from !

    Jack

    9 May 2020 at 12:10 pm in reply to: Did you know ! #582422
    Mr Jack Martin
    Participant

    Nick,

    I agree, its important to get the balance right.

    Carolin Crawfords input to the program is excellent.

    Clear skies,

    Jack

    15 April 2020 at 10:32 am in reply to: Dustball meteor #582284
    Mr Jack Martin
    Participant

    Bill,

    Good work, well done.

    Jack

    Essex UK

    15 April 2020 at 10:29 am in reply to: MarsJupiterSaturn together #582283
    Mr Jack Martin
    Participant

    The scene at 03.57 UT.

    Clear skies,

    Jack

    Essex UK

    7 April 2020 at 6:07 pm in reply to: MarsJupiterSaturn together #582241
    Mr Jack Martin
    Participant

    The state of play this morning in the pre dawn sky 04.21 UT, the 3 planets are starting to align.

     Regards, 

    Jack

    1 April 2020 at 8:28 pm in reply to: MarsJupiterSaturn together #582200
    Mr Jack Martin
    Participant

    Thanks for your comments I should have added taken with my Canon PowerShot G7 MK3, F2.8 1/8 sec ISO3200 hand held leaning out of my bedroom window.  

    Regards,

    Jack

    30 March 2020 at 3:03 pm in reply to: Help needed :) Image Venus and the Moon for Parallax Project #582189
    Mr Jack Martin
    Participant

    Here’s my effort from Rayleigh Essex, nearly 1 hour before, as Damien asks please let us know if the pics are valid for your experiment.?

    Regards,

    Jack

    14 February 2020 at 4:26 pm in reply to: Betelgeuse #582030
    Mr Jack Martin
    Participant

    Due to dimming, is it changing its spectral type ?

    Regards,

    Jack

    Essex  

    27 January 2020 at 10:34 am in reply to: When does the new decade begin ? #581973
    Mr Jack Martin
    Participant

    Thank you all for your explanations, its now clear and correct as to when this is.

    But, I can see why others would disagree.

    It also depends on your level of knowledge about the subject, which is after all of Astronomical significance.

    Regards,

    Jack

    Essex UK

    26 January 2020 at 1:17 pm in reply to: BAA meeting livestream #581964
    Mr Jack Martin
    Participant

    Because trains are not running again weekends, I viewed on line.

    Volume, wavered from soft to loud.

    Picture, close ups of speakers appeared washed out by bright lights, other views ok.

    I enjoyed the meeting, thank you for live streaming.

    Jack

    Essex UK

    11 December 2019 at 6:17 pm in reply to: Spectra of old novae #581767
    Mr Jack Martin
    Participant

    Congratulations and well done Robin, you are an inspiration to us all.

    Good to meet you again.

    Jack

    11 December 2019 at 6:15 pm in reply to: Pure iron meteor spectrum #581768
    Mr Jack Martin
    Participant

    Bill,

    Well done, good work. 

    I have NBS monograph 32 Tables of spectral-line intensities parts 1 + 2, Meggers.

    Multiplet tables of astrophysical interest Moore, if this helps with identification.

    Regards,

    Jack 

    11 November 2019 at 6:06 pm in reply to: Transit of Mercury #581572
    Mr Jack Martin
    Participant

    Canon EOS400D 1/15 sec ISO 400 Skywatcher Evostar 100 ED. Herschel wedge white light.

    Many thanks to Abi for the use of her refractor.  

    Regards to all,

    Jack

    Essex UK

    22 August 2019 at 8:01 pm in reply to: Perseid fireball and spectrum #581301
    Mr Jack Martin
    Participant

    Bill,

    ‘The power of spectroscopy’ your right about that, 85% of what we know about the Universe comes through dispersing the light of an object through a spectroscope !

    So, keep up the good work.

    Regards,

    Jack

    Essex

    16 August 2019 at 6:05 pm in reply to: Perseid fireball and spectrum #581272
    Mr Jack Martin
    Participant

    Bill,

    Excellent spectra some good science there, well done.

    Jack

    Essex  

    7 June 2019 at 3:04 pm in reply to: Vega 2019 International Spectroscopy Symposium #581122
    Mr Jack Martin
    Participant

    Peter,

    I am looking forward to meeting the others

    Regards,

    Jack

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