A very **UNFAIR** comparison of CCD to DSLR!

This is a very **UNFAIR** comparison of CCD to DSLR!  It's unfair because of the following.

Differences

1. Taken on different nights
2. Guiding methods - 50mm finder guiding on DSLR and OAG for CCD
3. Coma corrector on CCD, NOT used on DSLR
4. 2x2 binning on the CCD, native iso6400 on DSLR

Similarities

1. Same telescope, +Akule my custom 35.6cm f/4.5 Newt
2. Similar processing routine

Also of note, the image scales are quite different and were somewhat difficult to line up.  I got 'close enough' and stopped getting precise alignment.  I don't think this a valid or fair comparison but a nice contrast to both style of cameras.

Here's a three frame animation comparing.

1) RGB via the DSLR only

2) Lum via the CCD and no filters at all

3) A standard LRGB combination of the filterless CCD as lum and the one-shot color as RGB.

Here's the DSLR ONLY

Here's the filter-less CCD 'lum' shot only

Finally the LRGB combination

Perhaps it not even a comparison at all, but the lack of clear skies and poor planning had me running over the same objects within a week's span or so and having used different cameras got me hankering for a comparison even it wasn't like for like

Hope you enjoy and feel free to comment or critizice!!

Speaking of spring clouds and rain, here's 3 planets in one night to make up for it all!

Be sure to get to the bottom of this for something unique that I've never done before!

Weak spring astronomy weather, shoot three planets to make up for it.   YES!

I shot Venus, then Jupiter and finally Saturn.  I'll lead off with Jupiter since it's not as big as it used to be and well past peak.

Sporting a view of the little red spot, this is probably my last view for the year.  Although.... it's proximity to Venus might allow me a few more tries if the weather clears back up.

Rest of this spotty season here - https://plus.google.com/photos/+MichaelAPhillips/albums/6110337235125938065

Previous Jupiter seasons here - http://maphilli14.webs.com/jupiter

Next up is a pretty nice looking Saturn.  At a low altitude of 37° altitude, this will be hard to beat this year.  The rings have opened up to 24° since being edge on in 2009

The rest of 2015 is here - https://photos.google.com/u/0/album/AF1QipMDzUOnk6T0QJnWMeivPCpLE3TwLgN6oK7dqLed

You can view all years of my own photos of Saturn here - http://maphilli14.webs.com/saturn

Finally and oddly the first photo of the night is Venus.  This image is in false color, comprised of Infra-red as Red, UltraViolet as Blue and Green is a 50%/50% blend of those two.  I used the UV as a lum al-la this technique (https://www.youtube.com/watch?v=oOeog89qnPY&feature=youtu.be)

All my previous Venus' - https://plus.google.com/photos/+MichaelAPhillips/albums/5856527934636955329?banner=pwa

Now to reward you for all your hard reading!  In the past I've shot Venus over a short time period but have not really gotten a chance to show the winds move the clouds.  Here's a short, two frame animation showing the cloud movement over just a few 10's of minutes.

Thanks and clear skies!

Adventures in collaborative planetary astrophotography part 2

No, there's no part one per se.  Last January Kevin Quin, a very accomplished astrophotographer had some issues with his color filter wheel.  He lost one filter's worth of data from the whole night.  In is asking around it just so happened that I had my own images from the same date and time.  We're separated by about 235 miles straight line distance but had quite similarly good weather.  His quest to fill the gap in his own data was met with a warm welcome from me.  I always share my data and methods with all and in this instance he rescued his own data with a small help from my own.

http://www.pbase.com/skybox/image/154198802

Now onto part two: In some odd twist, I suffered a loss of the whole filter wheel itself and not just a malfunction.  I lost the ability to change filters quickly enough for me to shoot a color image.  I didn't think to ask anyone else for other shots of my own missing colors but did think the weather was good enough to shoot at least one color's worth.  Red is always my goto and usually has the best seeing.  I unscrewed the red from the wheel and put it into my imaging train.  It wasn't until many days later that I found Kevin was again out at the same date and time as me!  What luck, he was happy to share his stacks of Jupiter with me and I was able to make this color image.  Using a single stack of Kevin's blue data that he got from a 5min derotated .ser file, I combined with my own Red.  For green I used his blue and my red at a 50/50 blend.  This technique is often called RsGB or a synthesized green (http://www.astrosurf.com/cidadao/red_blue.htm)

I found it amazing that despite our differences in locations, cameras, telescope types, styles and sizes we were able to bring out data together to make great images.

In discussing this type of coimaging work, we can't think of many folks who have done similar work.  Association of Lunar and Planetary Observers (ALPO), BritAstro, Planetary Virtual Observatory and Laboratory (PVOL) and Section Planets Italian Amateur Astronomers Union are all good candidates for such collaborative work.  All sites tend towards gathering images at separate dates and times and using them for study of changes over time or whole planet maps.

What Kevin and I are thinking would be a place to share raw or simple stacked images in an effort to learn and discover.  I'm curious to know what other's think about this.  If folks are interested we can setup a shared file repository and wiki to make it happen.

As a sample here is my raw red frame:

 and Kevin's blue

Special thanks to Kevin Quin for making my image really special!  Thanks Kevin!

2014 Solar System in Review

I can sit and complain about clouds being so bad this year all I want, but the fact of the matter is 2014 was a great year and I'm blessed to spend it with my friends and family!

Spanning from January 4th to December 30th (Never give up!), all photos are mine, including the Earth and all taken within the calendar year of 2014.

While last year was the year of the comet with 4, this was the year of the asteroid for me with over 12.  I say over 12 because as I learned to hunt these tiny and faint things amidst the stars I found some images of poor quality and sometimes iffy results.


Here's the high resolution version on imgur as google shrinks it.

Here's the high res version with labels on imgur

Sun - 20141021

Sunspot map from the same day: http://www.spaceweather.com/images2014/21oct14/hmi1898.gif?PHPSESSID=117sfv869vda0snais43gtol01

My other solar photos here

Solar

Earth via my amateur nature collection

Nature

Nature

Nature

Lunar Eclipse - 20141008

Lunar Eclipse 2014

Mars - 20140327

This image was featured on the Spaceweather!

Mars 2013-2014

Asteroids and minor planets

This year was the year of the asteroid as I got my MPC site designation by observing 3 asteroids in one field of view over 3 nights!

http://astromaphilli14.blogspot.com/2014/06/asteroid-trifecta-with-animation.html

My work in progress table

Asteroids

Jupiter - 20140104

This image was Published in Sky & Telescope April 2014

Jupiter 2013

Saturn - 20140508

Saturn 2014

Uranus - 20141112

I also made a moon animation! http://astromaphilli14.blogspot.com/2014/09/uranus-and-5-moon-animation.html

Solar System - Uranus - All years

Neptune - 20140827

Neptune All Years

MISSING from 2014 are:

Mercury

1-Mercury

Venus

Astronomy / Solar System / Venus / All years

Pluto

Pluto - All years

Finally

If you enjoyed this post please check out my other work on my homepage:
http://maphilli14.webs.com/

Also check out previous years 'best of':
http://maphilli14.webs.com/solarsystemreviews.htm


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October saw some great clear skies - part 2, the nebula edition

This edition is very nebula heavy.  Nebula are interesting in their aesthetics and beauty but are foreboding, inhospitable places.  In sharp contrast I love galaxies, they're tiny, life bearing universes unto themselves.  They are like turning up a rock and finding varied things of all kinds, rocks, bugs, worms.  Each galaxy too is unique, but i get ahead of myself thats post 3 of my wonderful start to fall deep sky observing!  Also be sure to check out part 1

IC 1848 the Soul Nebula

I had previously shot this area last year   One major difference that jumps out is the B&W vs false color from this year.  The color in all my newer nebula shots is false, created in photoshop where I turn the white areas of the nebula 'red' and the bright stars 'blue'.  The other things to notice are the duration of subs/total as well as the roundness resulting from better guiding, which is a combination of better guide cam and better overall polar alignment techniques.  Also the collimation was a bit better for this years attempt!


Second up is NCC 281 or the Pacman Nebula.

Here's a link to the 1920x1080 wallpaper edition!


Finally batting clean up for round 2 of my fall, clear and deep sky collection...

NGC 1499 the California Nebula.  I think this is the area around the San Francisco Bay area!  :)

Thanks for looking and be sure to check out all my Astronomy related images and follow me on Google Plus, Twitter or Facebook!

October saw some great clear skies -- Part 1

This month was full of many clear days.  I took advantage


First up is NGC 100, which according to http://cseligman.com/text/atlas/ngc1.htm has "a mere apparent size of 6.2 by 0.6 arcmins." It is also described as "exceptionally elongated galaxy, with a very small nucleus in comparison to its overall size. Such galaxies are sometimes called "superthin" galaxies." Nearby is PGC 1509358 a 17.9th mag galaxy.

Also in the lower left is UGC00219 a bright 15.5mag at a distance of 240,700,000 LY



Come poke around the full 1:1 resolution here


Next up is NGC 7814, another edge on galaxy. The one sports a nice dust lane and in contrast to the above galaxy, NGC100, this galaxy, NGC 7814 is a spiral. It "is sometimes referred to as "the little sombrero", a miniature version of Messier 104." (http://en.wikipedia.org/wiki/NGC_7814) Edge on galaxies are very fun and the reddish orange core might be slightly exaggerated in this photo unintentially as I had a color balance issue.






Here's a link to the full 1:1 resolution

In the high res photo, the most astounding thing I've found to date is SDSSJ000302.45 or PGC3377433 in another catalog. At mag 20+ this tiny galaxy has a measured recessional velocity of 115421 km/s in converted distance it's 5.3 BLY away!!! WHAT?!!

Between the galaxy NGC7814 and the three bright starts to its right is the faint galaxy in question. Here's a closer look.

Labeled

Unlabeled

Blink Animation

Finally up a a face on galaxy and part of the Messier catalog, M74.  It's two main spiral arms make it a Grand design spiral galaxy (http://en.wikipedia.org/wiki/Grand_design_spiral_galaxy ).

Full res here!!!



My full album of all galaxy photos - https://plus.google.com/photos/+MichaelAPhillips/albums/5825355202588613809?banner=pwa

All deep sky photos are here - http://maphilli14.webs.com/mike-s-deep-sky-photos

All photos are taken with my custom 14" f/4.5 Newtonian ()

A refreshed Little Dumbbell - M76

I had previously shot this target on the same telescope ( +Akule  ) last year but used a DSLR.

Here's my more recent effort with a CCD.

Astrobin has the full 1:1 resolution


The full 1:1, HD (1920x1080) resolution for your desktop wallpaper 

Now for the somewhat unfair side by side CCD vs DSLR

The DSLR, a Canon 7D is on the left from last year.  The new SBIG STF-8300M is on the right.

What is really unfair is that the integration times are MUCH different.

Still to me, there is a HUGE difference and I wouldn't want to use a DSLR as my main camera for this type of work.

The most fun was that I was inside playing games while the image was taken using Sequence Generator Pro and monitored via teamviewer.  The clouds started to pass but the guiding held up so I kept going!