[Mr Ian David Sharp]

Hi all,

HT Cas now fading down to 16th/17th mag in V after being at 12-ish. Also, the big pre-eclipse humps seem to have gone, or reduced.

See last night’s run attached.

Ian.

Attachments:

1. 

   20250804_HT-CAS_IRB_PixelSkies-C11_IDS_plot_lines.png
   

[Mr Ian David Sharp]

Wow! Proper motion – who’d have thunk it!?

Thanks for the replies chaps.

Cheers
Ian.

[Mr Ian David Sharp]

Gary Poyner wrote:

That’s exactly what it is Ian – orbital hump just prior to eclipse. I’ve seen these before visually, and it can take you by surprise!

Thanks Gary,

Here are two more eclipses from last night. Getting slowly fainter overall.

Ian.

Attachments:

1. 

   20250730_HT-CAS_V_PixelSkies-C11_IDS_plot_lines_check.png
   

[Mr Ian David Sharp]

Jeremy Shears wrote:

Very nice photometry, Ian.
Looks like a pre-eclipse hump (due to accretion hot spot).

Thanks Jeremy,

I’ll keep monitoring it and get longer and longer runs on it as we get our nights back!

Ian.

[Mr Ian David Sharp]

Hi all,

A better image from me. This time 36 x 90s with L filter.

https://britastro.org/observations/observation.php?id=20250728_122425_2b3fb6faab2f3379

I measured the V mag to be 17.5 +/-0.1 using an aperture radius of 12 pixels (0.48 “/pix) with APASS V mag band.

Ian

• This reply was modified 2 weeks, 4 days ago by Mr Ian David Sharp.
• This reply was modified 2 weeks, 4 days ago by Mr Ian David Sharp.
• This reply was modified 2 weeks, 4 days ago by Mr Ian David Sharp.

[Mr Ian David Sharp]

Dr Paul Leyland wrote:

Nice one Cyril

…nice one son…let’s have another one!
😉

[Mr Ian David Sharp]

I finally managed to get it!

https://britastro.org/observations/observation.php?id=89413

Cheers
Ian.

[Mr Ian David Sharp]

Yes, very sad. A really helpful chap.
Ian.

[Mr Ian David Sharp]

Hi Grant,

Yes, I wrote an ASCOM Alpaca driver for my dome 2 or 3 years ago. I believe it was the first ever Alpaca dome driver. Works like a charm.

However, it was written in Python. It runs on a Raspberry Pi.

Ian.

[Mr Ian David Sharp]

Sad news!

I’ve known Storm since I was a young teenager in the SDAS (South Downs Astro Soc.) in the early 70’s.

Ian.

[Mr Ian David Sharp]

Hi all,

It seems SU UMa has brightened again. Last night was around 12.75 in V. See attached.

Cheers
Ian.

Attachments:

1. 

   SU-UMa-20241218.jpg
   

2. 

   20241217_SU-UMA_V_PixelSkies-C11_IDS_plot_lines_check.png
   

[Mr Ian David Sharp]

Marvellous! Thanks Jeremy.

[Mr Ian David Sharp]

Yes, this is typical and a diagonal is normally required. All my modern refractors are the same. It allows for lots of backfocus for Cameras, filter wheels and OAGs.

Ian.

[Mr Ian David Sharp]

Thanks Gary,

I’ve uploaded my R, V and B results from last night – it seems to have steadied. I’ll continue to observe it when I can and my data is always in the BAA database if it’s needed.

Cheers
Ian.

Attachments:

1. 

   OJ-287-1.jpg
   

[Mr Ian David Sharp]

Hi all,

There’s a small brightening of OJ 287 going on. Not sure if it will be significant.

Cheers
Ian.

Attachments:

1. 

   OJ-287.jpg
   

[Mr Ian David Sharp]

Let me know if I can help, David.

I enjoyed the Mars encounter.

Cheers
Ian.

[Mr Ian David Sharp]

Hi all,

I managed a decent run last night from Spain and concur with the ~0.067 day superhumps. See attached.

Cheers
Ian.

Attachments:

1. 

   GOTO_superhumps.jpg
   

[Mr Ian David Sharp]

Gary Poyner wrote:

Ian: I’ll be uploading my CCD observations to the BAAVSS database shortly. The software will detect that this is a new object, and will create a new file with the name I upload it with – which is GOTO065054.49+593624.51 I can’t see any alias in VSX, so it will be this long winded nonsense I’m afraid.

Thanks Gary, I’ve successfully uploaded my data now.

Cheers
Ian.

[Mr Ian David Sharp]

Hi all,

I set my C11 in Spain to image it for a couple of hours early this morning (6th Oct : JD 2460589.588866 – 2460589.697257) and got 132 measurements in an L filter. I used AAVSO chart X38448OQ and V magnitudes to get the attached. Average Vmag was 13.33 and there seems to be a gentle fade (the check star looks flat).

See attached for light curves and also the FOV with comp stars from AstroArt8.

Andy – are we going to add this to our BAA database? I have uploaded to the AAVSO db.

Cheers
Ian.

Attachments:

1. 

   GOTO065054.49593624.51.jpg
   

2. 

   20241006_GOTO065054_IRB_PixelSkies-C11_IDS_plot_lines_check.png
   

3. 

   GOTO065054.49593624.51_FOV.jpg
   

[Mr Ian David Sharp]

Well done Andy!

Marvellous news.

Ian.

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