|
Re: Thor's Hammer
On 10/1/2021 10:34 PM, Roland Christen via groups.io wrote:
At least that's what I call it, the outstretched hand and hammer in theSixteen years ago, using a C9.25 SCT @ f/5.6 and an ST-8 camera, I imaged that same area in Ha, and came away with a much different impression -- the larger region looks like an erupting volcano. So much so, that I colored the image in Photoshop, and named it "Hydrogen Volcano." Here's that image: <http://astronomy.mdodd.com/nebulae-05.html> BTW, the pelican Nebula is indeed known as IC5070, but I believe the small region we both captured is IC5067. --- Mike
|
|
|
|
Re: Thor's Hammer
Roland Christen
Mmmmm....
-----Original Message-----
From: ap@... <ap@...> To: main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Fri, Oct 1, 2021 10:13 pm Subject: Re: [ap-gto] Thor's Hammer Roland Christen wrote:
I can have my “Home for wayward telescopes” web site configured in a jiffy if you want to apply.
😊
-- Roland Christen Astro-Physics
|
|
|
|
Re: [ap-ug] Thor's Hammer
Pete Lardizabal
Roland Oh my…  Pete On Oct 1, 2021, at 11:12 PM, Roland Christen via groups.io <chris1011@...> wrote:
|
|
|
|
Re: Thor's Hammer
ap@CaptivePhotons.com
Roland Christen wrote:
I can have my “Home for wayward telescopes” web site configured in a jiffy if you want to apply. 😊
|
|
|
|
Re: [ap-ug] Thor's Hammer
Roland Christen
Got any other treasures hibernating at the shop? Yes indeed we do.
Roland
-----Original Message-----
From: Pete Lardizabal <p14@...> To: main@ap-ug.groups.io Cc: main@ap-gto.groups.io Sent: Fri, Oct 1, 2021 10:05 pm Subject: Re: [ap-gto] [ap-ug] Thor's Hammer Amazing image Roland!
More amazing it has been sitting around for 15 years!
Got any other treasures hibernating at the shop?
😉
Pete
On Oct 1, 2021, at 10:34 PM, Roland Christen via groups.io <chris1011@...> wrote:
-- Roland Christen Astro-Physics
|
|
|
|
Re: Thor's Hammer
Roland Christen
Yes, it was originally made for both deep sky imaging and planetary. Problem is, around here the seeing is never very good, so getting any planetary detail is problematic. The scope needs to be in Florida down by the Gulf where the airflow is laminar.
Rolando
-----Original Message-----
From: Jeff B <mnebula946@...> To: main@ap-gto.groups.io Sent: Fri, Oct 1, 2021 10:04 pm Subject: Re: [ap-gto] Thor's Hammer Great image. The "little" Mach 2 is certainly hanging in there with that load and focal length. I suspect it would make an excellent planetary imaging scope too.
Well done sir.
Jeff
-- Roland Christen Astro-Physics
|
|
|
|
Re: [ap-ug] Thor's Hammer
Pete Lardizabal
Amazing image Roland! More amazing it has been sitting around for 15 years! Got any other treasures hibernating at the shop? 😉 Pete
On Oct 1, 2021, at 10:34 PM, Roland Christen via groups.io <chris1011@...> wrote:
|
|
|
|
Re: Thor's Hammer
Jeff B
Great image. The "little" Mach 2 is certainly hanging in there with that load and focal length. I suspect it would make an excellent planetary imaging scope too. Well done sir. Jeff
|
|
|
|
Re: Thor's Hammer
Roland Christen
The focus doesn't change during the night. The only thing that changes is the FWHM which starts out at 1.25 arc sec and then slowly creeps up to around 1.7 as the sky scintillation gets worse by the hour. That's the local conditions here unfortunately. In a reall steady night I might get around 1 arc sec resolution with the QSI683 camera.
Rolando
-----Original Message-----
From: Bill Long <bill@...> To: main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Fri, Oct 1, 2021 9:39 pm Subject: Re: [ap-gto] Thor's Hammer Looks solid. I had a RCOS made with sitall mirrors. Once you focused it for the night, it never needed it again.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Roland Christen via groups.io <chris1011@...>
Sent: Friday, October 1, 2021 7:34 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io>; main@ap-ug.groups.io <main@ap-ug.groups.io> Subject: [ap-gto] Thor's Hammer At least that's what I call it, the outstretched hand and hammer in the neck of the Pelican Nebula, also known as IC 5070. It appears next to a cliff with what looks like a waterfall:
https://www.astrobin.com/6lbi12/C/
Testing out an older 12" F12.5 Mak-Cass which we built about 15 years ago but never put to use or sold. The mirror and corrector lens optics were made by Intes Micro when they were still operating. They are zero-expansion Sital. The rest
of the mechanical parts were fabricated here. The tube is carbon fiber.
To take the image I added a CCD67 telecompressor in order to get a larger field. I took it in one night with just over 2 hours of H-a narrowband. It really needs longer exposure.
Rolando
-- Roland Christen Astro-Physics -- Roland Christen Astro-Physics
|
|
|
|
Re: Thor's Hammer
The man’s got skill and talent. 12” Mak-Cass f/12.5…. /drool
It’s a bit mind boggling you’d build something like that and wait 15 years to put it to use. Then again, having the assets at your daily disposal is beyond my comprehension. Eric
|
|
|
|
Re: Thor's Hammer
Bill Long
Looks solid. I had a RCOS made with sitall mirrors. Once you focused it for the night, it never needed it again.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Roland Christen via groups.io <chris1011@...>
Sent: Friday, October 1, 2021 7:34 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io>; main@ap-ug.groups.io <main@ap-ug.groups.io> Subject: [ap-gto] Thor's Hammer At least that's what I call it, the outstretched hand and hammer in the neck of the Pelican Nebula, also known as IC 5070. It appears next to a cliff with what looks like a waterfall:
https://www.astrobin.com/6lbi12/C/
Testing out an older 12" F12.5 Mak-Cass which we built about 15 years ago but never put to use or sold. The mirror and corrector lens optics were made by Intes Micro when they were still operating. They are zero-expansion Sital. The rest
of the mechanical parts were fabricated here. The tube is carbon fiber.
To take the image I added a CCD67 telecompressor in order to get a larger field. I took it in one night with just over 2 hours of H-a narrowband. It really needs longer exposure.
Rolando
-- Roland Christen Astro-Physics
|
|
|
|
Thor's Hammer
Roland Christen
At least that's what I call it, the outstretched hand and hammer in the neck of the Pelican Nebula, also known as IC 5070. It appears next to a cliff with what looks like a waterfall:
https://www.astrobin.com/6lbi12/C/
Testing out an older 12" F12.5 Mak-Cass which we built about 15 years ago but never put to use or sold. The mirror and corrector lens optics were made by Intes Micro when they were still operating. They are zero-expansion Sital. The rest of the mechanical parts were fabricated here. The tube is carbon fiber.
To take the image I added a CCD67 telecompressor in order to get a larger field. I took it in one night with just over 2 hours of H-a narrowband. It really needs longer exposure.
Rolando
-- Roland Christen Astro-Physics
|
|
|
|
Re: Rookie Question
Derek S
Thank you, that explains it.
|
|
|
|
Re: Rookie Question
ap@CaptivePhotons.com
Derek S wrote:
It’s the pocket powerbox, I’m not sure if the larger ones would fit as the RA axis rotates.
I used two 1/4x20 screws, and one of the two brackets it came with (or maybe it was extra I do not know, but from Pegasus). The bracket does not quite fit a 1/4x20 screw, so I reamed it out (it only takes a very little bit and plenty of metal).
I found two 1/4x20 holes, one was for a socket head, one for the countersunk angled head, and these happen to line up (I think there’s only two that do on one end only of the 16” saddle). It is not quite straight but pretty close. You have to slide the saddle back a step also.
With nuts on the bottom tight it holds the PPBadv straight enough I did not need anything else; I had planned thick double sided tape near the end, but didn’t use it. If I recall you need a specific length for one bolt or it sticks up and blocks the temp probe connector.
It’s outside working for a living right now (and not doing well, it’s attracting clouds!) or I’d send a photo, but can tomorrow if that doesn’t make sense.
|
|
|
|
Re: Rookie Question
Derek S
Linwoord,
How did you attach the powerbox? I was thinking 1 screw and velcro? Sincerely, Derek
|
|
|
|
Re: New JPL Format for Horizons Ephemeris #APCC - Format Causes Issue
#APCC
Ray Gralak
Hi Don,
The data from the web site just loaded okay for me. I think the default settings are a little different. See this screenshot for the settings I used. Also, it appears that you cannot use control-A followed by control-C to copy the data because the data doesn’t open up in a new window. You have to manually select and copy just the generated lines of the data. -Ray
> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of dnakic via groups.io > Sent: Friday, October 1, 2021 2:48 PM > To: main@ap-gto.groups.io > Subject: [ap-gto] New JPL Format for Horizons Ephemeris #APCC - Format Causes Issue > > This past Monday I was using Horizons and went to JPL Website to download Ephemeris. I did both the text > file download and the data and the format looks a bit different. Note, the website looks different too. The > data pull would not work in Horizons. Appreciate insight into issue. > > > Header format: > > ******************************************************************************* > Revised: July 31, 2013 Moon / (Earth) 301 > > GEOPHYSICAL DATA (updated 2018-Aug-15): > Vol. mean radius, km = 1737.53+-0.03 Mass, x10^22 kg = 7.349 > Radius (gravity), km = 1738.0 Surface emissivity = 0.92 > Radius (IAU), km = 1737.4 GM, km^3/s^2 = 4902.800066 > Density, g/cm^3 = 3.3437 GM 1-sigma, km^3/s^2 = +-0.0001 > V(1,0) = +0.21 Surface accel., m/s^2 = 1.62 > Earth/Moon mass ratio = 81.3005690769 Farside crust. thick. = ~80 - 90 km > Mean crustal density = 2.97+-.07 g/cm^3 Nearside crust. thick.= 58+-8 km > Heat flow, Apollo 15 = 3.1+-.6 mW/m^2 Mean angular diameter = 31'05.2" > Heat flow, Apollo 17 = 2.2+-.5 mW/m^2 Sid. rot. rate, rad/s = 0.0000026617 > Geometric Albedo = 0.12 Mean solar day = 29.5306 d > Obliquity to orbit = 6.67 deg Orbit period = 27.321582 d > Semi-major axis, a = 384400 km Eccentricity = 0.05490 > Mean motion, rad/s = 2.6616995x10^-6 Inclination = 5.145 deg > Apsidal period = 3231.50 d Nodal period = 6798.38 d > Perihelion Aphelion Mean > Solar Constant (W/m^2) 1414+-7 1323+-7 1368+-7 > Maximum Planetary IR (W/m^2) 1314 1226 1268 > Minimum Planetary IR (W/m^2) 5.2 5.2 5.2 > ******************************************************************************** > > > > Thanks, > Don > > >
|
|
|
|
New JPL Format for Horizons Ephemeris #APCC - Format Causes Issue
#APCC
dnakic@...
This past Monday I was using Horizons and went to JPL Website to download Ephemeris. I did both the text file download and the data and the format looks a bit different. Note, the website looks different too. The data pull would not work in Horizons. Appreciate insight into issue.
*******************************************************************************
Revised: July 31, 2013 Moon / (Earth) 301
GEOPHYSICAL DATA (updated 2018-Aug-15):
Vol. mean radius, km = 1737.53+-0.03 Mass, x10^22 kg = 7.349
Radius (gravity), km = 1738.0 Surface emissivity = 0.92
Radius (IAU), km = 1737.4 GM, km^3/s^2 = 4902.800066
Density, g/cm^3 = 3.3437 GM 1-sigma, km^3/s^2 = +-0.0001
V(1,0) = +0.21 Surface accel., m/s^2 = 1.62
Earth/Moon mass ratio = 81.3005690769 Farside crust. thick. = ~80 - 90 km
Mean crustal density = 2.97+-.07 g/cm^3 Nearside crust. thick.= 58+-8 km
Heat flow, Apollo 15 = 3.1+-.6 mW/m^2 Mean angular diameter = 31'05.2"
Heat flow, Apollo 17 = 2.2+-.5 mW/m^2 Sid. rot. rate, rad/s = 0.0000026617
Geometric Albedo = 0.12 Mean solar day = 29.5306 d
Obliquity to orbit = 6.67 deg Orbit period = 27.321582 d
Semi-major axis, a = 384400 km Eccentricity = 0.05490
Mean motion, rad/s = 2.6616995x10^-6 Inclination = 5.145 deg
Apsidal period = 3231.50 d Nodal period = 6798.38 d
Perihelion Aphelion Mean
Solar Constant (W/m^2) 1414+-7 1323+-7 1368+-7
Maximum Planetary IR (W/m^2) 1314 1226 1268
Minimum Planetary IR (W/m^2) 5.2 5.2 5.2
********************************************************************************
|
|
|
|
Re: Connection issues. . .. again
#ASCOM_V2_Driver
When troubleshooting USB connections... 1. Try a new, quality USB cable. 2. Try a different USB port. 3. See what Device Manager is saying. 4. This time, really do try a quality USB cable, and not just pretend to do so. 5. Try a different USB cable and a diff PC. 6. Come to this forum with your hat in hand.
Not to overwork it, but I also support Ethernet approach.
|
|
|
|
Re: Connection issues. . .. again
#ASCOM_V2_Driver
Worsel
Not to overwork it, but I also support Ethernet approach.
Once the mount is connected to a router, you should be able to see the address assigned to the mount by either 1. Logging into your router 2. Using the Enet-WiFi-Polling utility that A-P provides CP4 https://www.astro-physics.info/index.htm?tech_support/mounts/cp4-update/cp4-update CP5 https://www.astro-physics.info/index.htm?tech_support/mounts/cp5-update/cp5-update Bryan
|
|
|
|
Re: Hello All and pardon the newbie questions.....
Sébastien Doré
I have about 40 lbs of payload (EdgeHD 8in + SV70t + imaging gear) on my Mach2 and I use 2 x 18lbs at the very top of the shaft and 1 x 10 lbs for fine adjust about an inch below the second 18lbs (much like on Eric's photo).
I also bought a 5# in case I needed a little more versatility (and glad I did). For example, as an alternate balancing solution, while still placing both 18# at the top of the shaft, I omit the 10#, and add the 5# near the bottom. I actually find it easier to accurately achieve neutral balance this way... Hope this helps. Sébastien
|
|
|
