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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-delta & H-epsilon:
I had some problems with stacking, so I used the best single frames in analysis.
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.
The new SW Evostar ED150 is really getting some use here after my initial tests. We are having a good run of clear skies. This morning I got up at 3:30 am to do a lunar imaging run (see elsewhere). After that I quickly set up on M42 as it was near the local meridian. Using my ES 4.7mm 82' EP (255x) I concentrated on the Trapezium first. I was staggered by the view not only because of the detail under the Moon but because all 6 stars (A to F) were clearly visible immediately and pin sharp sitting in a greenish mist. Here is my really quite poor chalk sketch of the approximate view hastily drawn on my obsy blackboard wall (ignore the screws in the ply):
Checking with the detailed Whitepeak Observatory graphic the stars I believe in clockwise order are from the top right: B, D, F, C, A, E. I have often tried to view the 6 stars before with my SCT 9.25" but this scope revealed them with ease.
Star C (Theta-1 C Orionis) is described in the same graphic as an Extreme star: 40 Solar Masses; Surface temp 40,000K, the hottest known <6mag star; 210,000x sun's luminosity and an O6 spectral type.
I then swapped to my 2" 24mm ES 82' EP to view M42 but that view was swamped somewhat by moonlight so I will have to wait a while to try that.
First, I'd like to say that I'm in wet diapers as far as imaging goes, just making a few baby steps. Tonight was clear and not as freezing cold as has been recently, so I took the kit into the barnyard where I have a fairly decent sky. I just added Bob's Knobs to my Edge HD 8", and had done an indoor collimation; I wanted to fine tune it outside as one goal of observing tonight. Another goal was trying out my new WO GT81 on the Moon, I haven't had the opportunity to use it for lunar because of recent weather.....and no Moon.
So, one of the last things tonight was to swing over to M42 after the Moon got too low to observe. I used the frac to observe wide-field for a while, then put the Edge on the mount; to check collimation I swung over to Castor, and clearly split it with a 25mm Plossl. Then I went to Capella, defocused so I could get the 'donut', and it was so perfect as I closed it down while focusing I left the collimation as it was. Skewing over to M42, I started with a 25mm Plossl in a 2" diagonal and worked my way up, ending with my 2" 2.5x Luminos barlow and a 13mm Ultima EP, giving me 385X. Visually, I could split 'E' and 'F' in the Trapezium, so I thought I'd see if I could get an image through the EP with my DSLR, since the Ultima is threaded for a T-ring. This is a single image, 2.5 seconds at ISO 6400. Less exposure did not bring out 'E' any better, and 'F' is showing as a bulge in its companion. More exposure hid both as the Trapezium stars were too bright.
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.