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Found 6 results

  1. Recently I observed profiles of hydrogen Balmer lines in Sirius spectrum with spectral type A. I used LowSpec spectrograph with 1800 l/mm diffraction grating and APO APM 107/700 on HEQ5 mount. H-alpha: H-beta: H-gamma: H-delta & H-epsilon: I had some problems with stacking, so I used the best single frames in analysis.
  2. Hi All, Encouraged by my image of Uranus and some of its moons some weeks back, I decided to take on the challenge of viewing and maybe imaging Sirius B with my CPC 1100 for the first time. At 9:00PM Sirius was at about 45 degrees - sky was completely clear with a limiting magnitude of about 4.5 and almost no wind. With an 8mm Baader Hyperion at 350X I was convinced that I could quite easily see a tiny spec between the flaring "spokes" of the main star. With the eyepiece pointed straight up I saw it to my lower right and estimated that it's position angle was thus roughly almost directly east (90 degrees). I checked this up on the Internet later and it seems correct for Sirius B. It's separation from the main star of around 10" (which I knew before) also seemed to be correct. I asked my 9 year old daughter and my wife to take a look (I asked them to look for a faint star close to the very bright star and tell me it's position) and both were in agreement with myself. Neither of them can be considered experienced observers :-) I then attempted to image the pair with my Sony SLT58 DSLR. I started at ISO 800 and took several images at each of 20, 10 and 5 seconds. Viewing these on my computer I was initially disappointed seeing nothing of Sirius B on the 20 and 10 second images, but then felt I could see a bulge on the main star in the 5 sec images. I dropped the ISO to 400 and took images at 1 and 0.25 seconds. Below it one of the latter converted to PNG format from the RAW and cropped. No further processing was done. Hope you enjoy!
  3. Clear night forecast, but -4 to -5 degree. My backyard has about an hour's view nearly due south, therefore finding the pup seems to be worth a try. 80ED on AZ4 is set up around 11 o'clock, half an hour later, Rigel is in observing field. According to recommendations, it's a good practice to split Rigel first since the pup is about the same seperation as Rigel double. starting from 10mm BCO, Rigel B is clear splitted in 135X with BCO 10mm +2.25x barlow. seeing is quite good actually. Some minutes warm-up back in the house, M42 is right there. using the same EP+barlow combo, the Trapezium C seems not exactly on focus, a little tweek on focuser, the F shows up! looking closely to the side of A and B, there lies E! Actually my perception is that E is a little fainter than F, not sure if it's correct. Any, what a nice surprise, got E and F on my first shot with 80ED on Trapezium! Half an hour later, Sirius is there, flashing in colors, but not at all as fiercely it usually does. Using the same EP combo, focus on Sirius, it just flashs irregularly, no hint of star near it. then, there comes some brief seconds, there are many nice and round diffraction rings around Sirius, still nothing. When Sirius is treed out, I have to pack things without finding the pup. though still very satisfied.
  4. I was out earlier looking at the Pleiades and Orion (see separate post). I came in and waarmed up for about an hour. I went back out to view Sirius and the surrounding area. Sirius was fantastic. I wish I could see Sirius B (which I used to look at in my scopes). M41 was easy to see a few degrees almost directly below it. I found M35 very easily near one of the feet of the twins of Gemini. I saw a few other fainter open clusters while scanning the sky. I'm back inside, where I'll stay and will soon hit the sack.
  5. Hi my name is Jay, new to all and any forums, lol. Not sure where to start so here I go. I have a few questions about Sirius the double star while observing through my Nexstar 4se telescope using a 2x Barlow and my neximage burst color. While I was able to capture quite stunning results of the star Sirius, this morning before sunrise, I was curious though as to if I might have incorrectly focused my scope on the star or if this image is a clear image of the star? I will attach a brief 7-8 second video I took this morning. It was the first time I had gotten to focus my scope on the star as it kept drifting before but I solved the drifting issue as a result of improper anti-backlash. But now back to the video, was wondering if any of you could help determine if I properly focused on the star because from what I see the star appears to be in the shape of an out-of-control atom in the video and at the center it is black, is this the observing of a quasar? Thanks for all the help in advance if anyone stops by thanks for the time and efforts here's the video. star.avi
  6. I'm putting together a beginner setup for AP and had decided on the Sirius EQ-G (HEQ5). I see that Orion makes a hybrid version, the Sirius Pro Az/EQ-G. I know the Sirius EQ-G is a good beginner mount, as I see it referenced everywhere as a good place to start for just about anyone beginning in AP, but is the hybrid mount equally stable? Does anyone have the Pro Az/EQ-G who can comment on stability for AP? I'd really like to have the Alt/Az functionality for quicker visual setup, but if it will interfere with stability for AP, I'd have to consider buying a separate setup for visual use. Thanks in advance for any input.
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