Recent Posts

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TAC Imaging / Re: California Nebula NGC1499 in Perseus
« Last post by robhawley on May 18, 2017, 03:21:40 PM »
If you are interested this is my photo using narrowband.
http://almadenobservatory.net/16-NGC1499Cal/NHS_6.png
http://almadenobservatory.net/16-NGC1499Cal/index.html

Narrowband is able to separate the various elements.
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TAC Imaging / Re: Using Astro Cameras on the Eclipse?
« Last post by robhawley on May 18, 2017, 03:19:57 PM »
I would be skeptical about using an astro camera for the eclipse.  Your shutter speeds will be short.  Astro cameras are not typically designed with fast shutters (hence the discussing in flat fielding of minimum exposures).

As far as brightness you can get an idea from the table in mreclipse

http://www.mreclipse.com/SEphoto/SEphoto.html
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TAC Visual / Jupiter Double Shadow Transit Tonight, May 18, 2017
« Last post by pnatscher on May 18, 2017, 12:36:31 PM »
There's going to be a double shadow transit on Jupiter tonight from 8:52pm until 9:40pm.  The shadow's of Io and Europa will be seen traveling westward across Jupiter, with Europa leading.  Brighter moon Io will be transiting westward over the darker North Equatorial Belt if you can pick it out.
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Observing Intents / Re: Observing This Week and Weekend?
« Last post by pnatscher on May 18, 2017, 11:53:01 AM »
Yep, the forecast for tonight is very good so I'm heading up to FP for a night of observing, and if the weather holds then Saturday too.  Go lots of sketching to do in galaxy land.
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Observing Intents / Observing This Week and Weekend?
« Last post by pnatscher on May 17, 2017, 11:16:16 AM »
The skies have cleared and I'm planing to observe at a local dark site the next few days.  Initially I would like to get out Thursday and Saturday nights.  Anyone game for one of our choice locations?
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Venus at mag -4.29 0.7 AU away, and Uranus at mag 5.88 20.6 AU away, in one wide field of view.  10 magnitude difference!  Interesting, Starry Night Pro shows Venus maximum magnitude from Earth as -7.08.  Really?  Maybe it means something else.

Venus will have 50% illumination, 24 arc-second size.  Uranus will be 3.4 arc-seconds.
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Sounds good, I think I'll be there.  ;-)
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We have the pleasure having Steve Gottlieb give a talk focused on observing deep sky objects: Off the Deep End -- Challenging Observing Projects for the Intrepid Amateur. Steve will be giving a version of this talk in Cambridge, UK, to the Webb Deep Sky Society in June. You do not want to miss this presentation!!

 Is your observing experience getting stale? Do you find yourself either looking at the same objects each year and don't know additional interesting deep sky objects to view beyond the Messiers and the brighter well-known object

 Refocus by working on observing projects. For near 40 years Steve has worked on numerous fascinating lists of oddball galaxies, groups and clusters of galaxies, stellar and giant planetary nebulae, ancient open clusters and more. He’ll discuss how to jump-start your observing by delving into Hickson Compact Groups, Local Group Dwarf Galaxies, Palomar Globulars, Abell Planetaries, Vorontsov-Velyaminov Interacting Galaxies, Extragalactic Globulars, Karachentsev Galaxy Triplets and more. He’ll discuss his results using several telescopes up to 48-inch aperture.

 Steve Gottlieb has been an active visual observer since 1978 and currently uses a 24-inch f/3.7. He has observed the entire NGC catalogue (over 7500 entries) and a total of nearly 15,000 objects. Steve is a contributing editor to Sky & Telescope magazine and has written numerous deep sky articles detailing his various observing projects.
 For more info: http://astronomy.santa-cruz.ca.us/
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TAC Visual / Re: Action on Jupiter
« Last post by sgottlieb on May 03, 2017, 08:33:19 PM »
I missed the reappearance of Europa as I started viewing after the beginning of Io's transit.  I've just kept my 24-inch set up in the driveway and mostly using an 8-inch off-axis mask for an unobstructed view.

On other recents nights (after returning home from 4 nights on the 48-inch), I've been tracking down doubles in Coma Berenices and Canes Venatici, and on Monday night helped put on a public star party for the physics students at Albany High
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TAC Visual / Re: Action on Jupiter
« Last post by mccarthymark on May 03, 2017, 08:11:47 PM »
Steve I saw last night's action too. At the same moment Io started its transit you should have also seen Europa reappear from behind the planet's shadow. It flared as a tiny point then grew to a full disk in about a minute. Way cool. I was able to watch  Io transit along the belt as a bright disk until a few minutes before its shadow looked like a nibble was taken out of Jupiter 's limb.

I've also been enjoying some high power 553 - 850x views of the moon's terminator. Getting ready for close doubles in Cancer tonight
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