Forum Replies Created
-
Posts
-
Alan
With the WAT910HX / RC you have the makings of sensitive asteroid occultation timing setup. The addition of a GPS video time inserter, a larger aperture lens and a controllable mount is all that is required in terms of hardware to make useful observations. A clear sky would be nice too, but we can hope.Tim
Thank you Philip and Alan for your observations. The movement of the path is typical of predictions for higher numbered asteroids. Sometimes this can favour an observing location.
There have been a number of MISS reports (no occultation) from observers in SE UK and Europe. Observers who happened to be in or close to the predicted shadow were clouded out this time, and no observation made. Two observes in England detected small drops in the light curve, and these were attributed to cloud passing, since the time of these obscurations were outside the expected occultation window.
Thank you to all observers, and i expect there will be more bright star events in the future.
The Asteroids and Remote Planet Section (ARPS) has a group of observers making regular recordings of fainter star predictions. ( Magnitudes in the range 10-14 ). More than 50 stellar occultations were reported (positive) last year.
I would also check in Device Manager, the status of the USB controllers. There should be no errors shown
TimIm not an expert – and sorry ive just seen your request. In the section on Universal Time, GMT starting at Noon was also referred to as GMAT, Greenwich Mean Astronomical Time – a very minor point.
I like the new facilities very much, but has the zoom in (enlarge) link been removed ? (Sorry if this have already been discussed)
I have had success with F/4 Newtonians on a good GOTO mount. At the other end of the scale a short focal length lens on a portable tracking mount should give pleasing results when images are stacked. I use 50 to 200mm prime lenses but ive had good results with 18-105mm zoom range. If you are interested in timelapse, then it would be possible to put long exposure wide angle frames into a movie that includes foreground objects.
Thanks for the clarification of G mag being a good match to unfiltered CCD photometry. I wasn’t 100% sure until now. There is a G* mag which is not the same as G ?
Aracebo was one of the first instruments to locate Fast Radio Bursts, and to image many Near Earth Asteroids. I think the 305m dish excelled at radio imaging. I hope the education center can be rescued.
Hello Alan,
EAA is a technique used a lot by astro-socs for live imaging in learning situations and demos, sometimes with colour cameras which are using longer exposures. There is quite a lot written about the subject.https://www.cloudynights.com/forum/73-electronically-assisted-astronomy-eaa/
This may give you some more ideas. The video camera we use most (WAT 910HX) can image bright deep sky objects at the longest exposure setting (5 sec) with a fast optical system. (I have also used a telephoto lens at F4). At a public meeting i showed visitors M42 through an 8″ F/4 with integrating video and some were recording my monitor with their mobile phones – a long way from science, but sows some seeds…
A google search and a NASA paper “Taking apart the light” lists 661 nm as caused by Nitrogen. I dont know if this is a lab spectrum or “interstellar”. Will they be the same – or not i ask myself ? (Just a thought)
That is a very nice image Ryking. Reading around the subject i found this presentation by Robin Glover enlightening.
https://www.youtube.com/watch?v=3RH93UvP358I looked at 1945/6 images on GE. There are several areas of huts which have been cleared now. Maybe this is a clue?
TimWhen using the ATIK, what does gain 1,2 and 5 represent in terms of the whole scale ? – in other words, what is the maximum gain setting in the software ? I have Sharpcap, so i would like to investigate sensor characteristics more fully with my QHY174.
Also, does temperature effect CMOS characteristsic ? Im thinking it should.I hadn’t realised SharpCap Pro had this facility. Thanks for the tip Alex. My EQ6 is drift aligned and pretty good. It will be interesting to check this out more quantitatively, give or take a pinch of sodium chloride.
I found an informative description of the Pulsar dome automation on the Rigel Dome Control website, with lots of helpful detail on software including POTH – so i think i have enough to chew on now.
This is a very interesting conversation. In the example of the Pulsar Dome and Rigel controller, i would be interested to learn if anyone has used the LesveDome software and POTH, as described in Sky at Night Magazine 2018 Sept 5
It can searched in Google.I am reluctant to use an advanced application such as SkyX or MaximDL, as this is not my approach to imaging or telescope control, but i would like to control the dome via goto from CdC or similar with appropriate software to control the dome through the Rigel setup. (I use SkyMapPro and EQMOD). As you may be wondering, im completely new to the idea of dome control, but i am learning and interested in anyone’s experiences. I don’t currently have a dome.
The Sky at Night article was written by Steve Richards.
Thanks – Tim (a future dome owner)
I see the pdf here:
https://iopscience.iop.org/article/10.3847/1538-3881/aba94d/pdf
It is open access
Cheers – Tim
Just a thought, that the 3.1 socket looks different to 3.0. Jeremy, you might like to check this for yourself on the machine you buy and if you need some sort of plug adapter to run the USB2 camera on USB 3.1. I dont have experience of this, i was checking out the specs after reading your question. I expect you will have 3.0 and 3.1 on a new machine.
