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First Light @G2G Observatory - Y-Cas Nebula in Lum, SoDakAstronomyNut
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First Light @G2G Observatory - Y-Cas Nebula in Lum

Getting plate-solving status, please wait...
First Light @G2G Observatory - Y-Cas Nebula in Lum, SoDakAstronomyNut
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First Light @G2G Observatory - Y-Cas Nebula in Lum

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Acquisition details

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Description

This single integrated image, not much in actual data or quality, is the result of a nine month, roller-coaster adventure.

I started doing AP in the late winter/early spring of 2019. For the past four years I would set up my rigs in my backyard. As the years passed, after upgrading from an EdgeHD 8 and EQ-6R Pro GEM to a CEM70 and Askar 130PHQ, I realized that I needed to find other ways to get the job done. I just turned 60 and the wear and tear of lugging 100-200 pounds out to the back yard and back into my garage was making things progressively more painful. I tried to find a scope buggy but they were no longer being made and I was too lazy/picky to make my own.

Nine months ago I started to seriously investigate having an astroshed built. I bought plans, looked into chopping the roof off a shed, etc. When I tried to contract someone they didn't want to take on the job - they didn't have the time, workers, or the job was too small (e.g. not enough money for them to waste their time). One offer was over $9,800 US for a 6'X6' RoRo SkyShed on a wooden deck, obviously an overbid to scare me off. Others offered to try next summer (2024) at slightly lower prices.

Right when I was ready to give up a dear local Astronomy Club member offered to sell me their gently used, three year old 8' NexDome, loaded with extras, at a very affordable price. Now I had to find a way to get a pad built to have a place for the dome of my dreams.

A neighbor/friend who owned a construction company graciously offered to build a 12'x12' concrete pad using his machines, at a very affordable price, in a very reasonable timeframe. The problem was once the spot in my backyard was dug, and a 1000 pounds of concrete & rebar was put in for the pier, his concrete person couldn't complete the job and my neighbor was not capable of finishing the job. Once the machinery was out of the spot I realized the excavation in my yard was done in a way that meant it would be a "pool" if we got any snow/rain. They cut themselves from the job. I had to find another way to get a pad.

When all was at its bleakest I lucked into someone at my work who knew a concrete pro. After seeing my situation he put together a plan to "pull a Phoenix out of the ashes." I shared the plan with other concrete pros to verify the details. He surveyed the site, helped make the estimates for the supplies needed (i.e. concrete, rebar, wood, etc.) and helped draft a plan to fix my 12'x12' "pool", raise my below grade pier and lay a high quality concrete pad sufficient to hold the NexDome and my AP rig. The only stipulation, he was too busy to do the prep work - it was my responsibility to complete the pier concrete, rock base and forms - but he was willing to pour and finish the concrete at a cheap price because he felt bad about the previous results I was left with.

A VERY dear, life-long friend offered to help me do the prep work. He knew what needed to be done and was willing to help with all the manual labor as long as he didn't have to be responsible for the finishing of the concrete. Everything appeared to be falling in place.

A week later - blasted and sore to our cores from all the work - we finished the job. We raised the underwater pier footing to 12" height using 900 pounds of concrete on top of the 1,000 pounds of concrete and rebar that was initially poured; I installed about sixty feet of 2" electrical conduiting to hold the power and Cat6 network cabling; we built the forms for the base coarse, we delivered by dump trailer and shoveled, raked and compacted 9.5 yds (19,200 pounds!) of base coarse; and then we built and levelled forms for a 12'X12'X4" (2.25yd) concrete pad. The real concrete pro and his son-in-law finished off the job by professionally laying the concrete.

Once the pad was cured enough several other dear friends graciously helped move the NexDome to it's new home on our freshly poured 12'x12' pad with a 24"x24" isolated pier footing. Due to my error the son-in-law helped replace - damn my iPhone compass app - and reinstall an accurately located set of bolts to hold my new iOptron permanent pier.

Thanks to the generous help of many friends the "Grateful to God (G2G) Observatory" is now a reality. Without the gracious help of these angels G2G observatory would not have been possible. I am forever indebted to all who made this possible.

Clear Skies and God Bless!

Update (18Nov23) - Added an additional thirty-five Luminance subs to previous session. I ran out of clear skies while capturing R filter subs. Lord willing, a future upload will have the fully integrated LRGB version. Clear Skies and God Bless to all!

Comments

Revisions

  • First Light @G2G Observatory - Y-Cas Nebula in Lum, SoDakAstronomyNut
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    First Light @G2G Observatory - Y-Cas Nebula in Lum, SoDakAstronomyNut
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B

Description: Beginning of the dream - three pavers mark the spots where I positioned my rigs' tripod every night. The flags were the initial layout for a 12'X12'x4" pad/deck.

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C

Description: The "pool" in my backyard - first attempt at digging a space to hold a pad that was dug undergrade. My first attempt at a template for the pier bolts rests beyond the hole. The form is around a 24" diameter, 5 foot deep hole that was dug to hold the concrete and rebar that would be a pier footing. The footing was later found to be almost 20 degrees East of North and ~6" below grade/floor height when our slope was eventually determined with a laser.

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D

Description: The "backyard pool with its off-rotation, metal sculpture." This was the image - with all the detritus of the build removed - that sparked the realization that my project had serious issues. Since the entire pad was going to be poured under grade it would turn into a pool after any serious rain or snow storms - a given where I live. When I asked the contractors, they stated they planned to pour concrete in the form as-is - no rock base, below grade.

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E

Description: The new plan based on the updates provided by a concrete pro at work and verified by the gentleman that would do the actual concrete pour and finishing. Note addition of concrete to previously poured pier. Also note amount of rock and concrete that would be above ground level on the right (the lowest elevation for the site).

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F

Description: The new pier footing - elevated an additional 6" (aka 900 pounds of concrete) to bring its top level with the new floor of the updated slab. The forms were split from top-left and bottom-right and flipped and stacked on top-right corner to form a "dam wall" to create a form to hold the 8" tall mountain of base coarse needed to bring the 4" concrete slab above grade. Note pink reference stakes used to calculate the reference height for all forms and material volumes required for the project.

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G

Description: The base coarse in progress - 9.5 cubic yards (19,200 pounds) of rock was needed to fill in the void created by the intial excavation for the pad. The dirt that was removed was transferred by the previous contractor to another site. Three layers of base was laid then compacted to fill in the void and to raise the elevation of the pad to a level sufficient to have the concrete above grade. Note 12" tall x 2" thick foam - around the 24"x24" pier footing - to help isolate the pad from the pier. Also note 2"x12"x12' forms for the 4" of concrete that would be poured over the base coarse.

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H

Description: The finished base coarse core - note 6" spaces between "dam wall" and concrete forms in upper right corner. Because this corner was so far above grade (caused by slope of yard that was highest on lower left corner by pink reference stake and lowest at upper right corner). the void was filled with concrete poured for slab and reinforced with wire mesh. Gaps around the forms will be filled in with rock and topsoil to protect the base and slab.

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I

Description: The slab after concrete was poured, finished and broomed. Two and a quarter yards of 4,000 psi concrete was required to complete the pad, including the 6" wide spaces around the northeasern corner's "dam wall" core. The crooked wood on the pier bolts was to provide a support to hold plastic sheeting from contacting the concrete due to an overnight sprinkle that was forecasted. A week later the pad was ready for the NexDome.

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J

Description: Test fit of AP rig on pier to verify height above the slab - NexDome has a 53" wall height at bottom of shutter slit - to ensure OTA could see through the slit. After the dome was placed on the slab I discovered that my bolts were 7.5 degrees east of North - we had to shear off and replce the bolts with 1/2"X12" Wedge Anchors that were correctly oiriented to North. My iPhone compass app was the culprit for the initial bad bolt placement. The wedge anchors were a PITA to get into the pier but once in were verified on the first Polar Alignment to be perfectly centered North.

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K

Description: Transport of the NexDome. Eight people used 12' 2X4's to lift the assembled base. Once on the trailer the dome was placed on top and then secured. One of the folks helping came up with idea to use two tiedowns to form a halo that was placed over the dome and used to anchor the base and dome down to the trailer. We drove 40mph for 15 miles to transport it all to its new home.

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L

Description: NexDome finally safe and sound at new home.

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M

Description: First light run from new obsy.

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N

Description: Interior of obsy during first light capture of Y-Cas Nebula. The total RMS from the new pier with this setup averaged an outstanding 0.18 sec for almost two hours before weather rolled in. The best total RMS I could get on my iOptron tri-pier was ~0.6-0.8 sec.

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O

Description: Eighty-eight two-minute Luminance subs shot in G2G Observatory. The Luminance image was processed in PI and cropped in PS. So many things still needed to bring the new obsy into working order: levelling, rounding, sealing, protecting the edges of the slab with new dirt fill, etc. Seeing improvement in the quality of the images spurs me on. CS & GB!

Uploaded: ...

Sky plot

Sky plot

Histogram

First Light @G2G Observatory - Y-Cas Nebula in Lum, SoDakAstronomyNut