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markbc01

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Everything posted by markbc01

  1. Hi You may have already figured this out in the past two months. but. . . 🙂 If it is an "original" Nexstar 8 from about 2001-2002, then the OTA is connected to the mount with a proprietary connection. It does not use a typical dovetail. If you want to use the OTA on another mount then you must remove the OTA from the mount and add a dovetail. I know,. I just did this. There are a couple of folks on CN who did this and I followed their lead. I mention this since an old -perhaps 20y old Celestron Nexstar mount may not be much in terms of reliability -I know I am moving mine over to another EQ mount. If this is your case, then perhaps this will help. Mark
  2. Hi! I think a binary star is a pair of stars that orbit each other. The star app may have indicated that you were looking at Nunki (Sadira) [AKA sigma Sagittarii,Magnitude 2.05 Sagittarius]. Nunki (https://www.star-facts.com/nunki/) is part of Sagittarius -where the moon is sitting right now. Nunki is a double star, or maybe better said a binary star. (https://www.space.com/22509-binary-stars.html) It is a bright star and in your picture/view it is to the right of the Moon, and maybe halfway between Moon and Venus on the lower right. The really bright thing lower down on the right -halfway to the horizon is not a double star. It appears to be Venus and is seriously bright. Last night Venus followed the Moon down and tonight the Moon follows Venus below the horizon.! One of the nicest pair of double stars to see ("split") are Mizar and Alcor on the handle of the Big Dipper -literally the middle star on the handle. If you look quickly, they may appear as a single bright star. When you look more closely you will see there are two stars in close proximity -very pretty. Discerning both stars in a careful viewing is called "splitting" double stars. It's fun -and sometimes easy (Mizar/Alcor), sometimes not possible ?Nunki?
  3. This is an interesting and timely thread. I just tried to incorporate my tablet (also a Galaxy Tab S7) into my viewing last session! I did not do so for vision - and by the way the “regular” Tab S7 is LCD vice OLED screen (the S7+ is still OLED 😊). Bottom line, I think it was good having another screen because I was using my phone to control my mount. Yet, even setting it on the table I placed outside, it was too bulky to use a lot. I was puzzled to read that the tablet may hurt peripheral vision more than a phone. My limited experience in dragging my tablet out for viewing did not seem to show different vision effects for tablet and cell phone. From what I have seen/experienced, it’s the light type and brightness that hurts the night vision. Both can deliver equally light or dimmed displays; but perhaps there is more science to this – on how peripheral vision can be more affected by a tablet than even a small (6.2” display) cell phone? Either way. . . last time out, I thought that having that larger screen out on the table (because you will need a table of some sort to balance hands, telescopes, and viewing, when adding something like a tablet), might be a plus. I was trying a telescope camera (svbony 305), and already had a small laptop (Surface Go) out on the table for the camera, anyway. My cell phone was controlling the AZ GTi mount with SyncScan, so I thought it would be easier to display the targets in the table using Stellarium plus. (As mentioned above, Stellarium can control the mount, but not very well – can’t do the follow-up fine-tune adjustments! You still have to go back to the SyncScan app). Well, the tablet does it job! However, I think it is a bit bulky and big to use as a routine item. If I had not had to set up the table/camera/laptop I would have not had the space to add the tablet. Perhaps balancing it on my eyepieces case, but that is not a solution. So, my two cents is that the phone is the better tool. Just pull it out, point it, confirm what you see, or find what you what, and then put it away! 😊. . . It is best if one does not even need it. During my planning in the daytime I do use a Planisphere and sometimes pull up the windows Stellarium app to pinpoint what will be in the sky: when and where for the evening. It also helps since I don’t know all 88 constellations and their stars! 😊 Even those I know are constantly moving! 😊 Still, when you plan one set of targets, and the clouds, light pollution, or just the air makes them moot, one needs a backup plan. . .phone (or tablet) to the rescue in the night session. As to the graphics, designs, or “eye-candy,” well I have several apps (nightshift, star tracker, star walk 2, Stellarium+ and tried a few others as well. For all of them I think the cleaner, less gaudy display the better. . .(and no music! Please!). That’s the case UNLESS I can’t find exactly what I am looking for, or I unless I don’t know what I am looking at. THEN I turn on the constellation designs/images/art work as well as the constellation lines. In a flash one can see exactly That what’s up there, quickly! It is a fast way to re-orient to the sky. I then can then reset back to a “clean” interface to compare star asterisms, and look at/for specific patterns; or even to see where other objects are situated nearby. All this is done on the phone. . . The tablet just seemed too bulky for what I needed. Of course. . . this is just one approach. . . 😊
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