WR 134 - A Wolf-Rayet Star with Nebulosity

Oh my gosh, what a terrible summer season for astrophotography. There was maybe 5 relatively clear nights since July 12 when I completed the tandem telescope setup. I had expected to image my favorites by now - the Trifid, the Lagoon, etc., with my new ASI2600 camera, but alas, that's probably not going to happen now as they are slowly receding in the southwest. I may have another couple of weeks to give them a try while the moon is out of the picture, but if the weather doesn't cooperate soon I may need to wait until next year. 

However, I did point my scope to an object I have never imaged before. It is well placed in the sky, high and to the SE allowing me to run long series of narrowband images throughout the entire evening. This object is WR134, a Wolf-Rayet star with surrounding nebulosity. A tough one for sure, but I wanted to give it a try. The star itself is nondescript, but because of the intense radiation it spews forth, the surrounding gas, excited by the star's radiation, glows brightly.

Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectra showing prominent broad emission lines of ionized helium and highly ionized nitrogen or carbon. The spectra indicate very high surface enhancement of heavy elements, depletion of hydrogen, and strong stellar winds. The surface temperatures of known Wolf-Rayet stars range from 20,000 K to around 210,000 K, hotter than almost all other kinds of stars. (Wiki)

WR 134 is a variable Wolf-Rayet star located around 6,000 light years away from Earth in the constellation of Cygnus, surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is five times the radius of the sun, but due to a temperature over 63,000 K it is 400,000 times as luminous as the Sun. (Wiki)

Over the nights of August 2, 3 and 6, I captured both Ha and Oiii narrowband data, 65 subs of 300 sec exposures for each, and a series of RGB subs to get the star colors correct. I had planned to get Sii data as well (to complete the standard SHO Hubble Palette) but the clouds moved in and stayed for awhile! So, with what I had, I processed a HOO palette, the results shown in the image below.

WR134 and Nebulosity (August 2021)
WO GT102 f/5.6  -  ASI2600mm Pro
65x300s Ha; 65x300s Oiii; 10x30s RGB Stars

WR134 is the brighter star in the small group of four stars at the center of the image. The enlarged central region clearly shows the star (reddish-white at center) with the bubble nebula surrounding it. The upper region of the bubble, bluish in color, is the Oiii ionized gas. 

Then, some clear skies presented themselves on and about August 25th. I had to setup and try to get the missing Sii data, which I was able to do over two evenings. I managed to get 67 subs of 300sec. I added this new data into the mix and with some re-processing of the original data with the new Sii data I created the final image using a modified SHO Hubble palette.

WR134 and Nebulosity (August 2021)
WO GT102 f/5.6  -  ASI2600mm Pro
65x300s Ha; 65x300s Oiii; 67x300s Sii; 10x30s RGB Stars

Full resolution images can be found at XCalRocketMan's Astrobin page

So, I have at least one new image to add to my collection from the 2021 summer season. Hopefully I'll capture some other deep space summer gems before they move out of view until next year.

 

Grand Slam of Jupiter Moons

On the night of August 15, 2021, a very rare alignment of Jupiter's moons occurred. On this night a triple transit on Jupiter with the moons Callisto, Ganymede and Europa in transit was visible from some parts of the world.  After the triple transit there was very rare event when Ganymede occulted Europa followed by Ganymede eclipsing Europa!  

Although I have tried my best to capture images of the planets the seeing at my location in Maryland is usually awful - and good seeing is an absolute 'must have' in planetary imaging. This event would have been one that I would have certainly tried for, but the weather conditions (clouds, go figure) nixed that.

However, Christopher Go, one of the handful of the best amateur planetary photographers, had excellent conditions at his location in the Philippines. He was able to capture the entire series of events with his 14" Celestron SCT.

Here is the NASA Astrophoto of the Day that he was awarded.

For a more complete review of Christopher's imaging, including this event, point your browser to his web page at http://astro.christone.net

Mars Drilling Didn't go Quite as Expected

Last week, NASA’s Perseverance rover shot for a new milestone in the search for extraterrestrial life: drilling into Mars to extract a plug of rock, which will eventually get fired back to Earth for scientists to study. Data sent to NASA scientists early on August 6 indicated a victory—the robot had indeed drilled into the red planet, and a photo even showed a dust pile around the borehole.

NASA

But, while data indicated that Perseverance had transferred a sample tube into its belly for storage, that tube was in fact empty, driving Katie Stack Morgan, deputy project scientist of the Mars 2020 mission, to call it “the case of the missing core.”

While this is not the 'hole in one' we hoped for, there is always risk with breaking new ground," Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate in Washington, said in a statement. (Perseverance's mission is the first step in a Mars sample-return campaign, which has never been done before.)

Read the full story at ARS Technica

Get Ready for the Perseids Meteor Shower

On the nights of August 11-13, 2021, the most famous of all annual meteor showers, the Perseids, will take place. And this year conditions are right for an optimal show, since there’ll be no moon to ruin our view.

Perseid meteors scream through our atmosphere at nearly 40 miles per second, so they often leave behind long, glowing, persistent trains. The shower gets its name from the point in the sky where the meteors appear to originate - the radiant. When the radiant is high in the sky you can capture the most meteors. As typical of most meteor showers, this occurs in the early morning hours - and this year that would be on Thursday, August 12 around 2 A.M when up to 100 meteors per hour can be seen (in dark suburban skies). Since this particular shower is so plentiful, it's possible to spot the meteors as early as 9 p.m.

Although that is the best time to view them, don't worry if you miss the peak as this shower typically builds up and winds down slowly, so you can head out on any of the few days before and after the 12th as well.

JASON WEINGART / BARCROFT MEDIA

Observing the Show

In order to achieve the best views avoid artificial light as much as possible when viewing the shower. This doesn’t necessarily mean you need to travel to a dark-sky site. Just try to keep nearby street and house lights out of your line of sight.

Pick a comfortable location where the view to the north-east is unobstructed. Lie back so that a large swath of the sky is visible and you are not straining to keep you head looking up. A lounge chair or recliner works well. Look for Perseid meteors at an altitude around 60˚ in any direction. If you want to see the most faint meteors be prepared to spend about 20-30 minutes to allow your eyes to get dark-adapted. 

Where do the Perseids come from?

Meteors are fragments of periodic comets, the dust and debris that they leave behind in their orbits. In the case of the Perseids, that comet would be Swift-Tuttle, which orbits between the Sun and beyond the orbit of Pluto once every 133 years. Every year, the Earth passes near the path of the comet, and the debris left behind by Swift-Tuttle shows up as meteors in our sky as they burn up in our atmosphere.

Visit to the International Latitude Observatory

Yesterday my wife and I needed to drop off our aging poodle Lucy for dental surgery at the Center for Veterinary Dentistry and Oral Surgery in Gaithersburg. The surgery was to take about 3-4 hours, and so after we arrived at around 7:45AM, we had some time to kill. Our ultimate location was Capital Quilts (directly across the parking lot from the Veterinary Center), but it didn't open until 11:00.

So we headed over to the Silver Diner RIO in the new RIO Lakefront Mall where we had a wonderful breakfast/lunch. We then took in the sights of the small lake/pond, this after I spent 15-20 minutes searching for my car in the parking garage. Turns out I entered from a different side and got disoriented. This is what happens when you reach the senior years!

But just prior to getting to the quilt shop, we headed to a small park that Joan had researched as a possible site to visit - an interesting astronomy related site called the International Latitude Observatory. Nestled right in the middle of a small area called Observatory Heights lies the Observatory Park, just across from Gaithersburg High School. A small park, with only about eight parking spaces on the small street, surrounds the International Latitude Observatory. 

Built in 1899 the Gaithersburg Latitude Observatory became part of an international project to measure the earth’s wobble on its polar axis. The Observatory operated from 1899 to 1982, when satellites replaced human observers. It is still active, however, with GPS systems using survey markers installed on these grounds to make periodic course corrections. Fully restored in the 1980s, the observatory building, the meridian mark pier, and the five geodetic monuments scattered throughout the park are listed on the National Register of Historic Places.

Unfortunately (or maybe not) the observatory building was gated off and locked, but it was a nice place to visit. 

View along the Meridian line

The Observatory

Meridian Mark Pier
used to align the telescope

Markers representing one of the other four locations

We finally got to the quilt shop where we both spent some money (amateur astrophotography is not the only hobby that can drain your budget!). I needed some supplies for items I'm designing and sewing for sale in my shop, Maryland Fiber Arts, LLC. Joan picked up some nice yardage as you can never have enough fabric. She creates quilts for sale in the shop.

Lucy was picked up around 1:00 or so, and we headed back home. She is doing fine considering she had ALL her teeth extracted! But she is not a happy camper!! We continue to remind her that recovery will take some time and then all will be good. I'm not sure she is convinced.

Hubble is Back!

NASA's Hubble Space Telescope is back in business, exploring the universe near and far. The science instruments have returned to full operation, following recovery from a computer anomaly that suspended the telescope's observations for more than a month.

New images have been downloaded showing some interesting odd galaxies.

See Phys Org for more details on the fix and the new images.

Adding the WO GT102 to the EdgeHD - Tandem Scopes

With the summer nebulae making their return I need to switch to my wide field refractor to capture these colorful deep space objects. Problem is, removing the 11" Edge from the mount requires a bit of effort and then the mounting plates need to be readjusted. Once the plates are done and the GT102 mounted I need to rebalance the scope. If I then decide I need to photograph planets this summer, or even some small planetary nebulae, the whole process repeats, as I remove the GT102 and add the Edge.

Ever since I got the new AP1100 mount I've been toying around the idea of mounting both OTAs in tandem. The mount can handle up to 110 pounds and I figured the two scopes would come in around 60 pounds including the camera and guide scope. That way I could just cover the two scopes when not being used and leave them on the mount. I could then image from either one just by moving the camera from one OTA to the other. A little bit of rebalancing may be needed, but that shouldn't be too hard.

So this past week I ordered a new 18lb counterweight. It arrived last Friday. I then mounted a dovetail plate on top of the Edge, and with two ADM clamps on the WO GT102 it was mounted on top of the Edge. The 50mm guide scope sits atop the GT102. With all the camera equipment attached I needed the new 18lb counterweight as well as my 5lb one to get the whole system balanced. Now all I need is some clear nights to check everything out. 

The only other issue that needs addressing is the cover. The existing Telegizmo 365 cover could work, but it would be a tight fit and would not reach to the bottom of the pier. I contacted Telegizmo to see about ordering a custom fitted cover. I await their response. Based on my measurements a new cover would allow me to keep ALL the equipment (Power supplies, computer, dew controllers, power distribution panel, etc.) out covered and protected.

So it goes. Hopefully, new summer nebulae images will soon be on the way.

My Attempt at the Pillars of Creation

Back in July and August of 2020 I imaged M16, the Eagle nebula, which contains, at it's center, what has become one of the Hubble telescopes famous images - the Pillars of Creation. I used my EdgeHD11 telescope to close in on the central portion of the nebula where the pillars reside.

The processing of the image took much effort, and every time I completed the final image I was not pleased with the results. 

Last week I tried a new technique for processing these images and together with some new software I was finally able to get a good result. So here is my version of the Pillars of Creation, in narrowband, Hubble palette.

M16 - Pillars of Creation - July/August 2020
EdgeHD-11 at f/11 with ASI1600mm pro
13 hours Ha, O3, S2 Narrowband w/RGB stars added

Complete details can be found at Astrobin

Hubble Space Telescope in Trouble

June 13, 2021, the Hubble Space Telescope shut down after an issue with a 1980s-era payload computer.
Team members continue to work on the issue to get the telescope operational once again.  (Image credit: NASA)

The Hubble Space Telescope, which has been peering into the universe for more than 30 years, has been down for the past few days, NASA said Friday. The problem is a payload computer that stopped working last Sunday, the US space agency said. "There is no definitive timeline yet as to when this will be completed, tested, and brought back to operational status," the Hubble operations team said.

Full story at Phys.Org and Space.com.

Juno Visits Ganymede

Up close and Personal

The Juno spacecraft flew closer to Jupiter’s largest moon than any other in more than two decades, offering dramatic glimpses of the icy orb.

Credit: NASA/JPL-Caltech/SwRI/MSSS

The first two images from NASA Juno’s June 7, 2021, flyby of Jupiter’s giant moon Ganymede have been received on Earth. The photos – one from the Jupiter orbiter’s JunoCam imager and the other from its Stellar Reference Unit star camera – show the surface in remarkable detail, including craters, clearly distinct dark and bright terrain, and long structural features possibly linked to tectonic faults.

Full story/article at JPL.

M90 - Galaxy in Virgo

M90 - Spiral Galaxy in Virgo

M90 - May 13-15, 2021
EdgeHD-11 Telescope - ZWO ASI2600mm Pro Camera
LRGB

Messier 90 (also known as NGC 4569) is an intermediate spiral galaxy with a weak inner ring structure. It lies about 60 million light-years away in the constellation of Virgo. The star formation in Messier 90 appears to be tapering off as evidenced by the galaxy's spiral arms appearing smooth and rather featureless. Galaxies with active star formation have knots and trails of knotted groups in their arms. However, the central region does show some significant activity where there exists around 50,000 stars of spectral types O and B (blue to blue-white hot stars) that formed around 5 to 6 million years ago (young).

This image was created by combining 24 blue, 18 green and 17 red subs, each 120 seconds exposure, to get the master color image (RGB). To the RGB image I added 54, 120 second luminance subs (monochrome) for the detail. I had planned to use 30 of each color, but the Maryland weather this year has been giving me fits!

Remember, complete technical details on all my photos can be found on my Astrobin site.