AlanM

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Viewing 20 posts - 1 through 20 (of 34 total)
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  • in reply to: Overhead DSLR photography #627071
    AlanM
    Participant

    When I imaged using my Canon camera I did try using a right angled finder but it proved unsatisfactory for me. I progressed to using ASIAIR which supports some Canon and Nikon cameras.

    https://i.zwoastro.com/zwo-website/manuals/ZWO_ASIAIR_PRO_User_Manual.pdf

    The disadvantage for a DSLR user of the ASIAIR solution is that they need a 12v power supply.

    I think NINA (Windows only?) also supports any DSLR that has an ASCOM driver available.

    in reply to: coalition #625845
    AlanM
    Participant

    Thank you for your response David.
    I don’t imagine BAA members would knowingly break the law but can you speak for the actions of all those that would be part of the coalition? To me climate activism encompasses protecting wildlife and preserving natural environments. Can we really say once we become part of a coalition that we are only interested in the artificial light aspect of preserving natural environments? Surely we adopt the wider views of the coalition.
    I’m not opposed to groups or individuals that do break the law because of their strong beliefs. History has shown that is often necessary to do so to achieve change.
    As for the current government, they have a policy of ‘Back the builders not the blockers’. I don’t imagine the building of new towns will do much for preserving natural environments.
    I wholeheartedly support the CfDs in trying to influence local government.
    That is my rant over. It would be interesting to hear other members’ views.

    in reply to: Magellanic clouds #623560
    AlanM
    Participant

    The Magellanic clouds would have been known before the Portuguese explorers saw them. If there is evidence they were known earlier in history by another name I wouldn’t have any objection to them being re-named to reflect this.

    in reply to: Is ANYONE getting clear nights any more? #623097
    AlanM
    Participant

    I can’t take it any more! I have decided two things:
    1) I will devote myself only to the study of Astronomy;
    2) better enjoy that money by inviting a beautiful woman to dinner. Just tell me I’m wrong.

    Giovanni,

    Don’t lose your enthusiasm. Maybe plan a holiday to a site with better conditions and take your beautiful date with you.

    Peter,

    I think I will be on dodgy ground if I make any comment about your post!

    in reply to: Is ANYONE getting clear nights any more? #623047
    AlanM
    Participant

    The motorist who forgets to dim his headlights is fined

    I can’t see this happening here!

    I have always enjoyed looking at Jupiter and with increasing light pollution I can see this becoming my main focus in the coming years. I am often surprised to see Jupiter shining through a gap in the clouds as though it pushes the clouds away.
    The Met Office cloud cover forecast does seem to be accurate in predicting clouds for me! It also enabled me to spot a gap in the clouds this morning and I had a good view of the Moon and Saturn in a brightening sky. I don’t know how accurate the forecast is. Presumably they do feed actual cloud cover back into the prediction. The monthly weather report they produce doesn’t give a cloud cover percentage but you can get an indication from the hours of sunshine/rainfall/frost.

    https://www.metoffice.gov.uk/binaries/content/assets/metofficegovuk/pdf/weather/learn-about/uk-past-events/summaries/mwr_2024_04_for_print_v1.pdf

    Attachments:
    in reply to: Preparing for the eruption of T CrB #622485
    AlanM
    Participant

    Bill,

    Uploading your image to Astronomy.Net confirms your marking.

    Attachments:
    in reply to: Last night’s Aurorae #621985
    AlanM
    Participant

    Great video. Pity about the clouds! What camera are you using for your Auroracam?

    in reply to: Request for observations of the nearby supernova SN 2024cld #621882
    AlanM
    Participant

    Great capture Alan. I think it’s flipped E-W

    E-W/N-S always get me!

    Hi, nice photo. Is the SN a bit off the centre of the NGC 6004 ?

    Thanks.

    Yes. It is worth checking here:
    https://simbad.cds.unistra.fr/simbad/sim-basic?Ident=NGC6004&submit=SIMBAD+search

    Attachments:
    in reply to: Request for observations of the nearby supernova SN 2024cld #621868
    AlanM
    Participant

    I was lucky to get an image of NGC 6004 using the COAST facility at telescope.org last night. It looks around mag 15 if I’m looking in the correct location and not being seduced by a nearby star

    Attachments:
    in reply to: February JBAA #621720
    AlanM
    Participant

    My journal arrived yesterday and it was fully sealed. I’m not too sure about the colour of the wrapper though. It almost went into the bill pile.

    in reply to: Missing airmass #621587
    AlanM
    Participant

    Kevin,

    An issue similar to yours was raised in the ASTAP forum:

    https://sourceforge.net/p/astap-program/discussion/general/thread/40bba8e112/?limit=25#b581

    It may be worth raising an issue on the ZWO forum to find out why lat/long aren’t saved when using ASIair (https://bbs.zwoastro.com/)

    I think it is possible to manually type in the name of the star when setting up the image capture with ASIair and the FIT files will then have it in the file name.

    in reply to: Forum oddities #621523
    AlanM
    Participant

    It doesn’t inspire confidence in the security of the website. Has the site been tested for SQL injection vulnerabilities?

    in reply to: map of light pollution trends #621515
    AlanM
    Participant

    That is good news. Enjoy your many years of observing to come… light pollution allowing!

    in reply to: map of light pollution trends #621510
    AlanM
    Participant

    My corneas will be yellower and the first hints of cataracts are probably appearing.

    I hope you have consulted an optician Grant. Getting treatment early could save your sight.

    in reply to: FITS and FIT files suffix #621449
    AlanM
    Participant

    It was something I thought I’d seen on the internet but your concerns make me think it was related to something else. Maybe converting a jpeg to 16 bit fit. I’ll have a look to see if I can find the page but it was sometime ago when I saw it.

    in reply to: FITS and FIT files suffix #621412
    AlanM
    Participant

    ASTAP does allow saving as a 16 bit FITS file:

    File -> Save as FITS file

    On the Save file as window that appears select the down arrow on the Save as type field. One of the options is 16 bit FITS files (*.fit*).
    Select this and change the name of the file as required and save.

    Theres some fun for anyone using Python, the Astropy library discourages the writing of 16 bit FITS files and I think it defaults to 32bit.

    I have some memory of being able to convert 32 bit files to 16 bit in Python by using numpy (get the data into a numpy array and convert using np.int16(data) and then write the data to a file) but I could be mistaken.

    in reply to: Another missing JBAA #620724
    AlanM
    Participant

    I believe the December JBAA is only due to arrive around now.

    in reply to: Accommodation at dark sky locations for astronomy(?) #620088
    AlanM
    Participant

    Yiannis,

    A date the site was last visited may be useful. I’ve been to places in Greece and Austria many years ago that had dark skies but I wouldn’t vouch for them now.

    Paul,

    In the past I have offered to accommodate BAA members who happen to drop by my place in La Palma when I am also in residence. That offer is still open for the time being.

    A generous offer. If that doesn’t boost BAA membership I don’t know what will!

    in reply to: Software for photometry (image calibration) #620072
    AlanM
    Participant

    I don’t do photometry Kevin but I have noticed a couple of videos that might be useful to you. The Q&A sections cover a lot.

    https://www.youtube.com/watch?v=ufbFaUywEBg&list=PLnZ_rvnR35rfGTaq4g3kzVOfkna1JeDyX&index=2

    https://www.youtube.com/watch?v=gcE7c4CggFM&list=PLnZ_rvnR35re3ZxnumCnIesanWvUyy9eB&index=24

    in reply to: Bias Frames for CMOS #619873
    AlanM
    Participant

    The AAVSO Guide to CCD/CMOS Photometry with Monochrome Cameras has some practical advice on bias frames.

Viewing 20 posts - 1 through 20 (of 34 total)