Damian

How to turn iPad screen red for observing sessions

Thanks to Damian for these instructions

Andy

 

  1. Settings
  2. General – accessibility shortcut on right at bottom
  3. Colour filters – tick on
  4. General – display accommodations
  5. Colour filters tick on
  6. Choose colour tint
  7. Touch finger on red crayon
  8. Increase intensity right up

Once set up the red colour can be turned on and off by clicking home button 3x in quick succession.

Ed changes the heat power control circuitry on the laser pointers he made for Damian and Andy

Ed’s laser pointers with integratedvheater straps and powered from 12V car battery thay he madr for Damian and myself are fantastic. However the power transistor gets quite hot so he came around yesterday and swapped the transistor for a small board that switches power on and off at high frequency so that less power is used and it does not get hot. Works brilliantly! Thanks Ed. This is what we should be able to buy commercially but can’t….

Andy

Spectroscopy from Lichfield with CCDSPEC – Damian and Andy

Damian and I went outside at my house in Lichfield and manually guided the spectroscope to get a bundle of spectrums of stars tonight. Once he had got the technique there was no stopping our boy Damian!

He calibrated the spectroscope using a compact fluorescent bulb – we used linear equation for figures for calibration file tonight.

Comparing images of spectra from brighter stars with online typical spectra – we could immediately find most of main lines generally within 2nm (20A) or real values. Wow!

Sky Watcher Equinox Pro 80mm, Manfrotto alt-az manual mount, hand guided, CCDSPEC, Nebulosity 4 software, QHY6 camera.

Note spectral classes:

Deneb A2 la
Altair A7V
Arcturus K1.1IIIFe
Vega A0V

Andy

 

N.B. With the peak of the Perseids tomorrow night and a reasonably clear night tonight we had expected to see a number of Perseid meteors…‚Ķ.Damian saw one in the nearly two hours we were outside and I missed even that one!

 

Calibration of the CCDSPEC/QHY6/Sky Watcher Equinox Pro 80mm/Nebulosity setup:

Calculation spreadsheet for higher order polynomials Excel Andrew Thornett 100818

Damian’s calibration below (his measurements circled):

Some spectra were amazing, showing incredible lines:

Vega:

Altair:

Spectral type A7V

 

Altair:

Some spectra were not so amazing:

Lightning!

Just had a hefty thunder storm over the hills from Westendorf, Austria.

I quickly downloaded the iLightningCam app that Ed mentioned (well the free version to trial)!

This was the result from having a play with the settings sitting on the balcony from our room (hand held no less)…

Damian

Noctilucent clouds over Streethay

Yes, the same ones Andy has also posted!

Woke up, looked out the bedroom (back) window… could see them bright as anything. Shot round to the front and grabbed camera. Couldn’t get the angle from my office window. Tried Julie’s office window (also on the front), but no joy… Headed downstairs in dressing gown and into back garden. Pulled wheelie bin out (for small tripod) but still no joy! Opened side gate and plonked tripod on car roof and started taking pictures…. rang Andy’s mobile – no joy, rang house number…. got a pretty vacant “…..heeellloooo…”. I think my curt response went something like…” Andy, it’s me, you need to get your arse outside,¬†Noctilucent clouds..!”

This is a 1 second exposure @ f/2.8. ISO 200, 48mm focal length was shot at 3.30am on Friday morning 6th July 2018

My trusty old full frame Nikon D3 on a small travel tripod, itself sitting on my car roof.

Damian

Off the iPhone6…

Observing in Lichfield 6-7/7/2018

This entry is more a statement to say we are both still active and interested than a detailed account as we only went outside to observe for about an hour 23:45 on 6/7/2918 to 00:45 on 7/7/2018.

Damian and I observed from my garden in Lichfield using my Orion ten inch Dobsinian with 14 mm Explote Scjrntific eyepiece.

We had good views of: Ring Nebula, Dumbell Nebula, M13, and Saturn, the latter enhanced using my 6mm Ethis eyepiece to give higher magnification.

On a Saturn we could see hints of bands, a shadow of the ring on the planet and the Cassini Division.

Andy and Damian