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Thread: Report of a few occasions

  1. #1
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    Default Report of a few occasions



    This is a report of more sessions put together. First off, I started watching more variable stars, they are fun.

    R Leo- watched it three times in the last month, from 8 to 7 to 6ish mag. As if looking at another star entirely.

    Zeta Gem: actually i was looking for another variable: R Gem, and i had to start the starhop from there. I was frustrated that I could hardly see it. Then I found out it was at its 10 day cycle minimum. a few days later it was shining again as brightly as the other knee at 3.3 mag. And I found R Gem too at 7 mag.

    The Canis Major asterisms from Alan's list: I will not write them by number cuz I cannot describe them like some of you, I would rather say a good method that saves time when you have none for whatever reason (clouds threaten, baby cries etc). So I searched for them in ss5 beforehand, and saw which ones were closest together, and numbered them accordingly. Then I only had to search with the RDF for the first group, cuz after that I just starhopped a few fovs at a time from one to the next, seeing without hurry 10 asterisms in 15 mins.

    Once it was good enough to search for galaxies, now i search for those between 11.5 and 12 mag, and most of the time it works. I miss seeing a galaxy in direct vision or at least decently in averted one, but i do see something. Now I searched and found three Cancer galaxies: ngc 2672, larger and spindle shaped, i actuallysaw a line sometimes, ngc2513 and 2749 small but there if I insisted enough. And the carbon variable x cnc on the way.

    That is about it, all sessions brief and cloud-dotted, horribleweather we're havinng this year too.
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  2. The Following 5 Users Say Thank You to milanpicard For This Useful Post:

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    Default Re: Report of a few occasions

    Thanks for the report, milan! Do you record your estimations of the variable star brightnesses and keep a log of them? I've done this in the past for a couple of them and was able to determine their period fairly accurately, although my brightness estimates were usually off a few tenths of a magnitude because I'm a terrible guesser.
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    Default Re: Report of a few occasions

    Congrats on nabbing those Cancer galaxies Milan and thanks for the report.
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    Default Re: Report of a few occasions

    Congratulations on the fine session Milan
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    Default Re: Report of a few occasions

    Glad you are at least getting in some sky time, Milan. I may have to try some of these variables. The sky here has simply not been conducive for galaxy work in quite a while. My last new galaxy was back 10 December.
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    Default Re: Report of a few occasions

    Thank you for the kind words, guys!

    @ Starlogborg: yes, I did start recording the magnitudes. It is fun to watch them vary. I read that variable star book and wrote out some hundred variable stars and the length of their cycles. And now I go to the AAVSO light curve generator and find out where they are in brightness. So I don't just estimate blindly, I let myself be guided by the estimates of more experienced observers, and that's how I try to learn: I see the magnitudes of the surrounding stars and compare their magnitude to the magnitude read on the AAVSO, and say: aham, so that's how bright a 7th mag is compared to an 8...

    @ Bryan: yea I was wondering to suggest that you take up variable stars, but who am I to suggest stuff to the mighty Bladekeeper with the H2500 and the 12 inch, right? But it would be fun to compare notes and magnitudes with you. So yea, go for it, variables can be fun if there's not much else to see.
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    Default Re: Report of a few occasions

    Glad you are finding new target types to keep your interest alive Milan. Doing that keeps us from becoming stagnant. Perhaps one day your circumstances will change there, either through re-location or increase in aperture and you will once again will be able to pursue your beloved galaxies as fervently as before.

    Regarding variable stars, I would recommend you do your magnitude estimations to a tenth of a magnitude by doing your comparisons to known nearby stars. The reason being is there is a vast difference between a star at mag 7.0 and 7.9. They are all 7th magnitude, but still different in brightness. It will take practice but something you will master in time if you pursue it ardently enough. Good luck.
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    Default Re: Report of a few occasions

    Quote Originally Posted by KT4HX View Post
    Glad you are finding new target types to keep your interest alive Milan. Doing that keeps us from becoming stagnant. Perhaps one day your circumstances will change there, either through re-location or increase in aperture and you will once again will be able to pursue your beloved galaxies as fervently as before.

    Regarding variable stars, I would recommend you do your magnitude estimations to a tenth of a magnitude by doing your comparisons to known nearby stars. The reason being is there is a vast difference between a star at mag 7.0 and 7.9. They are all 7th magnitude, but still different in brightness. It will take practice but something you will master in time if you pursue it ardently enough. Good luck.
    Well, a 12 dob is in the plan for next year, I have saved up about a third of the price in about almost a year. But if all goes well I will have the money by next year.

    At variable stars I have read too that comparing stars tenths of magnitudes brighter or fainter is the way to go, but many variables don't have stars around them that are only tenths of magnitudes brighter. So at R Leo for ex. the first estimate was like this: two 9th mag stars, a 6th mag star nearby. Ok, I kinda estimated it to be in between at 7.5. Turned out it was 8, or so AAVSO said. So I was half a magnitude wrong, cuz I had no 8th magnitude star nearby to make a comparison. But it is ok, I am trying to find stars that are closer in magnitude, hopefully I will get better with my estimates.

    Oh, and yea, I can hardly wait to get back at the galaxies! For example the three almost imvisible galaxies were more valuable to me than all the others put together. Not that i didn't enjoy those, of course.
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    Default Re: Report of a few occasions

    Quote Originally Posted by milanpicard View Post
    Well, a 12 dob is in the plan for next year, I have saved up about a third of the price in about almost a year. But if all goes well I will have the money by next year.

    At variable stars I have read too that comparing stars tenths of magnitudes brighter or fainter is the way to go, but many variables don't have stars around them that are only tenths of magnitudes brighter. So at R Leo for ex. the first estimate was like this: two 9th mag stars, a 6th mag star nearby. Ok, I kinda estimated it to be in between at 7.5. Turned out it was 8, or so AAVSO said. So I was half a magnitude wrong, cuz I had no 8th magnitude star nearby to make a comparison. But it is ok, I am trying to find stars that are closer in magnitude, hopefully I will get better with my estimates.

    Oh, and yea, I can hardly wait to get back at the galaxies! For example the three almost imvisible galaxies were more valuable to me than all the others put together. Not that i didn't enjoy those, of course.
    Good deal on the proposed 12 inch, and I know you will enjoy it. Be aware that physically it is much bigger and heavier than your 8 inch. But I am almost 64 yrs old and can still handle mine okay, so you will be fine.

    As for variables you may have to use your widest eyepiece to encompass more stars in the view. You can play around with whole magnitude estimates, but its not really useful in the long run as it is too broad. So before you visit a specific variable look at your software for the nearest stars and write them down in at least tenths if not hundredths so you have a more precise understanding of their brightness relative to your variable and then do your estimates. I realize that sometimes there are no stars of similar magnitude nearby, but just do the best you can. Magnitude estimates are of course a very critical part of variable star observations, as it is with supernovae observations. Have fun with it.
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    Default Re: Report of a few occasions

    Good to see you going after the asterisms Milan! My favorite targets (along with open clusters) from urban skies.
    Terry
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