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LongJohn54

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About LongJohn54

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    http://www.flickr.com/photos/53011089@N04/sets/

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    Kirkintilloch
  1. My obsy is heated to 7c above ambient by the dehumidifier which runs 24/7 set at 60%. It's only switched off when I open the roof. Here you can see when I entered the obsy and had the light on while I switched the dehumidifier off and opened up. The temperature drops from 7c to -0.5c over three hours and the humidity rises to 89%. The outside temp was 2c at the start and -1c when I finished and humidity rose from 84% to 96%. Without dew bands I wouldn't have lasted more than an hour but even at midnight the optics were clear when everything around me was soaking. Heating the optics (and the diagonal if I'm visual) by a degree or two the whole time the obsy is open is pretty much essential for me. 17 Jan to 25 Jan
  2. My existing Elitech Temperature/Humidity monitor is pretty simple and requires me to go and fetch it and plug it into my PC to extract the data then return it to the observatory afterwards. To fully encourage my laziness I wanted something which had the ability to connect via WiFi to my network and run unattended for a long time. After a bit of Googling and Amazoning I settled on the UBIBOT WS1 as its features met my requirements and had a lot else to offer as well. Plus at £65 it wasn't unduly expensive. https://www.ubibot.io/ubibot-ws1/ Its sensors are - Temperature Humidity Light Vibration Knock (can tell if its been dropped) Battery level WiFi signal strength External Temperature Probe I've got a couple of normal AA batteries installed but it can also use rechargable batteries and be recharged via the usb port. Data is sent via WiFi through your network and on to the Ubibot cloud server and saved in your account. This is free for up to 200Mb storage. Once full you can delete the data and continue on the free service. You can download up to 1Gb of data per month on the free service. This storage is per device, if you have two sensors you get 400mb storage and 2Gb download. The UbiBot data server connects with IFTTT (If This Then That) so you can set up any alerts or functions as you might require. I've tested a standard alert by switching off the nearest WiFi hub and seeing what happens. I soon received an email telling me that my device was no longer in contact and I got another email when service was resumed. So far (two weeks) it's been a perfect device for my observatory. Using the default settings I get Temperature, Humidity and Light reading every 5 minutes, WiFi readings every 15 minutes and battery level every 2 hours. These are uploaded every 15 minutes. So far I'm using less than 2Mb per week so my 200Mb storage will last a couple of years. The UbiBot control panel is well designed and simple to use. The charts can be set to any time scale and the latest readings are shown at the top left of the screen. From the control panel I download a .csv data file which can be set to any date range so you don't need to download all the data each time. This file is ok as it is but I've written an import function in Excel VBA. This imports the latest data and appends it to data I've already got. The next step is to write something that will create Excel charts of data similar to what is shown online. I can happily recommend the WS1 to anyone who wants to monitor the climate in their observatory or anywhere else. UbiBot recommend that it is not kept in a environment where the humidity is over 90% for long periods but other than that it's all good as far as I can see. I'll post updates with any changes. Just sitting on the pier at the moment. It has a slot for hanging and comes with double sided tape for sticking anywhere. You can see where I switched off the dehumidifier for a while and where I turned on the light too. I've set the default date/time to ISO format (yyyy-mm-dd hh:mm:ss) which leads to the charts being Month-Day. Note the columns J-Q which appear to be for future expansion unless there's a gps sensor that I'm unaware of. During the import I've converted Ubi's date string into a real date/time format. Also note rows 3142 and 3143 where the times are separated by 1 second. This happens occasionally so I'll add some code to the import macro to fix it and close the gaps. I'm sure someone can make use of reading down to a millionth of a volt. Plenty of detail as to what has happened. With a delay of 1 hour 15 minutes it has waited for 5 missed connections before emailing me. I think this can be customised if required. If not then you can create your own alerts with IFTTT.
  3. LongJohn54

    UBIBOT environment sensor

    Review of UBIBOT WS1
  4. 75Ah for £50 ? At 16Kg it's a bit heavy but will last forever if you charge it monthly (plus after every use). My one is 10 years old now. https://www.gooutdoors.co.uk/15894801/platinum-leisure-battery-s685l-75ah-15894801 It'll run a mount and a couple of dew bands all night with ease.
  5. We spent all of October in Villajoyosa (between Alicante and Benidorm). We had 24 perfectly clear nights, 5 partially clear and 1 with full cloud including a 90 minute thunderstorm with lightning every 5 seconds. I rather liked getting a months rain over and done with in a couple of hours and totally loved the rest of the time. 10pm to 3am, 28c, Tee shirt and shorts, binoculars and wine. Simple stargazing at its best. Up here just northeast of Glasgow we get the opposite, 1 clear night 5 partially cloudy and 24 100% cloudy nights. I think I need to move!
  6. The reflection in the corner is probably coming from stray light entering the viewfinder. When the mirror flips up to take a photo there is no light seal between it and the viewfinder. Normally this doesn't matter because your eye creates a seal as is pressed up against the viewfinder but for a long exposure it will be a problem. On my EOS70D I can remove the viewfinder eye cushion and replace it with a light blocker built into the strap. Maybe your camera can do this? Your images are pretty good for 15 seconds. Try a smaller target and vary the exposure times with higher ISO speeds (experimenting is good). If you do 60 x 30 second subs and stack them in Deep Sky Stacker (free) you may be pleasantly surprised at the result and decide that there is no need for a cmos camera just yet. There are plenty of threads on SGL that go into image taking and processing in much greater depth. Happy reading and imaging.
  7. The Pleiades is a pretty big target and your camera/scope combination shoots straight through the middle of it. I've highlighted (in black) where your first three images are pointing and (in yellow) where your forth image is on this Stellarium screenshot. What exposure time did you use? There's a reflection of something in the top right corner of the first three images. Any idea what it is?
  8. Page 94 of the 450D manual suggests using the self timer with mirror lock up. That way there is a delay of 2 seconds from pressing the shutter to taking the image and you'll have no vibration from the mirror either. https://files.canon-europe.com/files/soft31340/manual/CUG_EOS450D_EN_Flat.pdf
  9. Just given up imaging for tonight as it's -6c and the dew band couldn't cope. The central area of the lens was fogged up and wouldn't stay clear even with the help of my mini hair dryer. I was snug in the warm room at 20c so I didn't feel the cold at all.
  10. Pixinsight has been updated to version 1.8.8 as of 08 November and has more changes and new features. The biggie for me is that apart from Linux and Mac only Windows 10 is fully supported and earlier versions 'may work but there's no guarantee'. Eeeek! I wonder if my Win 8.1 will cope or will I have to make the change. PixInsight 1.8.8 Released https://pixinsight.com/forum/index.php?topic=14181.0
  11. Swapped my little stool for a more supportive seat. This bar stool from Dunelm can rise 21cm as well but I'll not need that in here. It has a rubber base so the metal will not scratch the floor when moving it.
  12. Managed to end up with the scope vertical at the end of Friday night's run which was interesting. Never taken it that far before. Guiding was actually ok but PHD2 had it's work cut out.
  13. That looks great. Where did you buy it? FLO does the 8inch version but they haven't got the 10inch on their site.
  14. I'm following this with interest as I've also started a M27 image. I have the same camera and am using a 102ED refractor with an 0.8 reducer/flattener.
  15. Just finished watching my recording and have to say it was an excellent programme. A bit heavy on special effects but the content was worth it. More I say. Keep making more.
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