- Last Updated: 17 July 2016
Image by Mike Hayford
Takahashi TAO-150 with a barlow lens yielding an effective focal length of 4300mm at f/28.6. Canon Rebel T1i to shoot video. The image was stacked using about 1400 frames with Autostakkert 2. Further processing was done using Registax 6 to do wavelet sharpening, Noiseless Pro to do just a little noise reduction and Photoshop to get the color balance correct.
The imaging was done Saturday, June 4, 2016 around 11:20pm from Monrovia, CA. The air was very steady although the transparency was poor. Amazingly, Saturn was only about 30 degrees above the horizon when I did the imaging.
Urban Imaging: Objects in Cygnus
- Last Updated: 05 July 2016
By David Nakamoto
In my previous articles on urban imaging, I gave some strategies to increase your chances of imaging deep sky objects. I’d like to give my personal recommendations for such objects in Cygnus.
For LAAS members, Cygnus has a lot going for it. For starters, it passes directly overhead for LAAS members, or it will if the date and time are right. For another, the three classes of objects that are the easiest to image, Globular and Open clusters, and Planetary nebula, are found near the Milky Way, which passes right through the constellation. The reason why these three types of objects are easier to image has to do with what they’re made of. Stars are probably the easiest objects to image, so clusters tend to be easy objects. Planetary nebula have a high surface brightness per square arc-second, compared to more nebulous objects like galaxies and emission nebula.
Mars Opposition 2016
- Last Updated: 04 May 2016
By Dave Nakamoto
With the May 22nd Mars opposition coming up fast, lots have been written in the popular press and the Internet regarding it. However, I’m amazed that little has been written on the specifics of observing this event. I hope to clear up the air on this, and for that matter, any other planetary viewing event.
Mercury Transit, May 2016
- Last Updated: 14 February 2016
The Mercury Transit Across the Sun
Monday May 9th, 2016
By D. I. Nakamoto
By the time the Sun rises above the horizon on the morning of May 9th, Mercury will already be in front of the disk. It will be halfway on its journey across it by 7:57am. It will finally leave the disk about 11:40am.
This will be the first time Mercury has cross in front of, or transited, the disk of the Sun since 2006, and it’ll be the last one until three years from now in 2019.
But all you’ll see is a TINY black disk crossing slowly across the Sun. And it’s REALLY tiny; only 12 arc-seconds, a fifth the size of Venus’ disk (60 arc-seconds) when it transited the Sun in 2012; I imaged from Griffith Observatory: