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  1. Past hour
  2. Looks like a great idea, adding it to my ever growing shopping list Cheaper on Ebay , search for XL4015 ( and LED if you want that option ).
  3. Whatever it is it's a sudden movement as the inner trail is narrower than the actual star. I still think it could be a breeze.
  4. I had never been happy with the processing of this image, and with little else to do I thought I'd try to reprocess it.Mapped SHOHa 8 x 900 + 1 x 600Oiii 6 x 300Sii 5 x 300SW130PDS, NEQ6, Atik460 This is a link to my original process, all I can say is - YUK!!!! https://www.astrobin.com/273499/0/?nc= Carole
  5. Who says Sunday is a day of rest?? Been a good day to make progress with the dome; got the NEQ6 back on the pier, set up the OO VX12 and collimated it with the Hotech. Installed al lthe camera stuff and cabled it up. Then balanced the mount and ran it to make sure the cables didn't snag anywhere in the rotation of both axis. Happy days. I read the post some time ago on dealing with moisture in the observatory. My first thought was airflow, but there was a strong camp for using a dehumidifier. I see both sides and although I preferred ventilation, understand this will not help if the outside air is humid. So I installed both. The fan is really cheap and cheap to run with around 10 air changes per hour, which should be enough. To make things simple to manage, I installed a switch on the outside to change from fan to de-humidifier. I will need to try the two methods out and work out which works best under what conditions. Getting there... Gordon.
  6. The Virgo cluster is gravitationally bound. The force of gravity on the scale of the local cluster is 10^7 stronger than the tension caused by the metrical expansion of space. (Sorry I don't have the figure for the virgo cluster.) So this observation is consistent with the expansion theory as @vlaiv explained. Indeed many local galaxies are blue shifted as can be seen in Hubble's original data. Regards Andrew
  7. Stellarium does the job for me. Huge amount of weather apps to choose from. Sat24 for live satellite feed, it can be added to home screen https://en.sat24.com/en
  8. Thanks for the reply, I'm after the OTA and rings / dovetail really, would you consider splitting so you can sell the mount on separately? What price are you looking for? Do you have suitable packaging to send it to me? Looks like you're to far away for me to collect it. Cheers, Ian
  9. Anyone with kids can use it as santa and his sleigh on christmas eve! Sorry ISS, but you've just been relegated.
  10. Sky safari for a planetarium. Clear outside and a weather app with radar data for the weather.
  11. Are you sure it was water, has been known for grease to drip on them if stored face down. Cleaned my ED80, still didnt work through 2 miles of cloud....
  12. I had thought of having one winding motor in the middle driving both the going train and the striking train but if the motor is to go behind the back clock plate it can't be in the middle because the pendulum occupies that place. I could have the motor on the left driving the main winding sprocket and that could go on to drive the strike winding sprocket. To go behind the back plate it would have to be a NEMA14 as a NEMA17 would be too big. I shall need to confirm that the NEMA14 is powerful enough to drive the clock. Whilst it would save costs a bit to use the one motor to wind both the clock and the striking system, I could save much if not all the reduction gearing by having a separate motor for the striking part. With a separate motor it could run it much less often and save gearing or even make it match the striking sequence with suitable Arduino code. Anyway, I can look into that later, as long as I leave room.
  13. Hi, not sure on your mount but my EQ6 pro sometimes gives me that error when the balance is wrong or the clutches are not tight enough, and also I reverse the direction one way or another until it stabilises the image? not saying that you may have done this already? ton
  14. I'm at the end of my teather with my Nightshift app. It's rarely correct. What do you all use on Android?
  15. Hah! Just realised that the two pins are not there to stop the retaining ring falling out at all. They're the pins that hold the lens cover on! Bizarre that I kind of forgot what they were there for as soon as I took the cover off and only realised once I had to put it back on again. James
  16. Clipping is process of cutting off certain values due to various factors. It is usually consequence of limited range of numbers that we work with. For example one can have "clipped stars" and bright parts of the image. This happens if target is bright enough (like some stars tend to be) and exposure is long enough. Maybe best analogy would be trying to pour water in buckets. All buckets can hold 5 liters of water and you try to pour 3, 6 and 8 liters in respective buckets. You will end up with 3L of water in first, but 5L and 5L in second and third - as they can only hold so much water. Values of 6 and 8 liters were cut off because of bucket size and you ended up with 5L in each. Because clipping cuts off values to same value - you end up with "white" surface instead of features in that place in the image. You can also clip black levels in histogram manipulation - it will create uniform dark surface without details - just like you selected area and did "bucket fill" tool in PS. Whenever you have any sort of cut off - you are changing information in image and loosing details / features. That is why this is bad (but sometimes can be used to good effect - like minimizing background noise and smoothing background out). HTH
  17. I mounted up the C9.25 this afternoon only to discover when I took the lens cap off that about a quarter of the corrector lens was covered by water stains on the inside Not much choice but to take the corrector out, then. Eeek! So, I marked the orientation of the parts as I took them off so I could put them back the same way. Fiddling the outer retaining ring past the pins that are presumably there to prevent it falling out was actually the most awkward part. I then discovered that the secondary was also pretty filthy so got the blower on that and did the needful on the corrector with Baader OW fluid. It now looks much healthier. Interestingly, the edge of the corrector had both a "V" mark etched into the glass and a pen arrow drawn on, about 40mm apart. It wasn't obvious that these two marks lined up with anything on the OTA though, so I ignored them and just reassembled it using my own marks. All in all it was far less stressful than I expected. I don't want to do it again, but I shall feel less worried about it if I have to. Now I just need to check the collimation... James
  18. One Sky-Watcher Heritage 100P. Customer Return Very minor signs of use. Complete with full manufacturer's warranty. £94.00 £74.00 (saving £20.00)
  19. Today
  20. Are you sure that it is in contradiction to expansion, could it just be peculiar motion of that galaxy because of local mass arrangement / gravitational pull? Any link on the source of info?
  21. Out of curiosity, what do you think is wrong with your old ones? Here is what I would do - for solar and lunar I would use preferably mono camera. If you value full disc shots without doing mosaics - then you need sufficiently large chip. For regular planetary imaging - I prefer color camera. Your 178c is good for much of this. Solar is tricky because it involves Ha, and mono camera is better there, but 178c is sensitive in Ha with all pixels - some more, and some less. Using flats will even things out, and although it is not the best solution it will certainly work. Having said all of the above, what do you hope to gain by getting a new camera? How much improvement? In mono segment, way to go would be ASI290 or alike camera - due to low read noise. However 178 mono sensor is not trailing much behind, and I wonder if it makes sense to get one since you already have 178c. 290 will almost cover full disk with Lunt so you will need at least two panels for full disk image with it. Same goes for Lunar. For planetary, I think the best option at the moment is 385 based camera due to lowest read noise and other characteristics that are more than fine.
  22. I've looked at the screenshots of BYE and APT and found them to be too complex for my needs, filling the display with unwanted tools and info. I use Canon Utilities which takes up little space on the screen. Good luck with your next session Michael
  23. Can someone explain in relativity simple terms to u defat and what is meant when clipping is referred to in images? I read being mentioned quite frequently, but even after being in the AP game for a couple of years, I don’t fully understand what it refers to! Rgds Aidan
  24. If you use sky safari with the SynScan App you can download loads of double star designations into it.
  25. hello everyone i have the sky watcher esprit 120 and the heq6r pro mount and im considering to buy autoguider package to my setup and wanted to aky you if this package is good? and recommended? some reviews... ZWO 60mm ASI120MM Guide system (ZWO – ASI120MM-s) also im considering the Orion Magnificent Mini Deluxe AutoGuider Package... which is better? thank you very much!
  26. Yes, I got it last time I was at astro camp. That's my camping obsy in the foreground with Davey T's kit behind. The Earth's shadow is the grey area below the pink belt of Venus, apparently named after the Goddess rather than the planet. Quote from the internet: The belt of Venus is an atmospheric phenomenon just before sunrise or after sunset, red sunlight can be seen in the upper atmosphere but a dark shadow of the Earth is on the horizon.
  27. Guys - time to choose a new camera. I have been using QHY cameras for some time but have decided to think again. What is the view on alternatives for lunar, solar and planetary? The only constraints will be USB3 obviously and price as I don’t want to spend a fortune (circa 500). The solar is Ha through a Lunt 50 and I’m partial to full disk images. Scopes can be seen below with the exception of my Swift 77mm refractor which has been very good on the moon. Thanks in advance Keith
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