AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.I agree
Imaging telescope or lens:Sandro Coletti ATM Newtonian 150mm f/5
Imaging camera:Canon EOS Rebel T5/1200D
Mount:Sky-Watcher HEQ5 PRO
Guiding telescope or lens:Starguider 50mm Guide Scope
Guiding camera:ZWO Optical ASI120MM
Focal reducer:TS-Optics 2" 3-element MaxField Newtonian Coma Corrector
Filter:Astronomik L-2 UV-IR Block
Dates:March 30, 2019
Integration: 1.1 hours
Avg. Moon age: 24.23 days
Avg. Moon phase: 28.57%
Bortle Dark-Sky Scale: 3.50
Mean SQM: 21.55
Mean FWHM: 3.50
Astrometry.net job: 2643435
RA center: 13h 25' 14"
DEC center: -47° 34' 55"
Pixel scale: 1.639 arcsec/pixel
Orientation: 359.394 degrees
Field radius: 0.985
Data source: Traveller
This image depics the beautiful and famous NGC 5139 gloublar, and is my first final image of my new telescope! Omega Centauri is packed with some 10 million stars, about 150 light-years in diameter, and some 15000 light years away, in the Southern Constellation Centaurus.  The field is some 2º in diagonal, or about 4 full moons. The star cluster is the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy. Though most star clusters consist of stars with the same age and composition, Omega Cen exhibits the presence of different stellar populations with a spread of ages and chemical abundances. In fact, it might be the remnant core of a small galaxy merging with the Milky Way. 
Omega Centauri is such a large and bright globular cluster, you can see it with the naked eye from dark skies, like a faint fuzzy star. It's recorded history goes back to Ptolemy, which catalogued it as a star in his Almagest. In 1603's Uranometria, Johann Bayer designated it as "Omega Centauri". It was only in 1826 that James Dunlop recognized it as a globular cluster.  Globular Clusters were successfully imaged in the 1880s.  From my research, the first photograph of Omega Centauri was by Sir David Gill, 1892. 
In my image the cluster was framed off-center, for I wanted to capture the faint Galactic Cirrus (or IFN), around the lower right corner. My plan was shooting at least 3h on the target, but wheather has prevented me from adding more data. Next new moon I'll try to improve it, but for now, I was happy it can be just barely hinted, despite the short 1h integration.
This image is my first published image of my new telescope. It is a Newtonian Telescope optimized for astrophotography. It was entirely built by Brazilian ATM's! It is a 150mm f/5 primary, polished by the renowned Sandro Coletti, and are of top quality. The mirrors are mounted on a carbon fiber tube. I added the TS-Optics 3-element 2" MaxField Coma Corrector. The corrector acts as a 0.95x reducer, and the effective focal lenght is 710mm, with a focal ratio of f/4.8.
By no means I plan on abandoning the wide field work - which is my greatest passion in astrophotography! I just added an instrument that allows me to frame some objects more tightly, with greater resolution. I can say I'm hooked!
As the telescope is pretty much custom made, there is still much to be optimized and adjusted - spacing, collimation, balancing, secondary mirror cell. Furthermore, @ 710mm FL, tracking, guiding, wind and seeing become more of a concern (compared to my usual ~135mm wides). But for now, I'm very happy with my astrograph's "First Light".
Constructive criticism, comments and suggestions are more than welcome in the comments section. Thank you for taking your time to look at this image.
Date: March 30, 2019
Location: MG, Brazil. Rural Skies (Bortle 2-3-4, calculated SQM ~21.6)
Camera: Canon EOS T5/1200D (modded), at ISO 1600
Optics: 150/750mm ATM Newtonian Telescope (mirrors by Sandro Coletti) + TS-Optics MaxField 2" Coma Corrector
Mount: Sky-Watcher HEQ5, tracking, guided (~0.9" RMS)
Exposure Detail: 21x180s + 16x10s = Total 65'
 APOD 2017/07/11;  Omega Centuari, Wikipedia;  Catchers of The Light, Volume 1, pp. 715. Stefan Hughes, 2012
|You have no new notifications.|
This page or operation is not available at the moment, because AstroBin is in READ ONLY mode. For more information, please check out our Twitter feed: https://twitter.com/AstroBin_com
If this image is the result of your processing of a public data pool, you can send it the pool so it's displayed there.
Use this form to select an existing public data pool.
If this image is the result of your processing of a private shared folder, you can send it the folder so it's displayed there.
Such limitation improves the website as a whole by discouraging people from creating fake accounts to like their own images. Thank you for understanding!
Currently, your AstroBin index is 0.00.