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R Leonis observed

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#51 KMA

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Posted 24 October 2022 - 10:35 AM

About 10d north of R Leo

V Leonis is slowly rising to maximum.

This morning at about 10.0m visual.

If weather here cooperates

hope to catch maximum of this

Mira type variable in next few days.

best wishes

KMA


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#52 Rutilus

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Posted 24 October 2022 - 11:06 AM

I managed to catch V Leonis back in April as it was dropping in brightness at around mag.10.5.

I will have to try and get an image of the star at maximum.

Attached Thumbnails

  • V-Leo-29-04-2022.jpg

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#53 KMA

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Posted 25 October 2022 - 06:29 AM

Very nice pictures Rutilus

I really like one done by 9.25 Celestron.

One by your  

refractor also shows NSV 4702.

Very nice

best wishes

KMA


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#54 Rutilus

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Posted 08 December 2022 - 05:37 AM

Been following R Leo over the last couple of mornings. It still an easy object with my 6 inch

achromat refractor. Estimated the magnitude at around 10.1 - 10.2.

Took this single 8 second image this morning with the 6 inch refractor at f/2.6.

 

Attached Thumbnails

  • R-Leo-08-12-2022.jpg

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#55 flt158

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Posted 08 December 2022 - 07:26 AM

Shatteringly sublime image from you, Rutilus!

I'm admiring the star's red hue. 

 

Recently I have been longing to observe R Leonis. 

It will be fun to examine and estimate its magnitude once again very soon.

But it appears we have snow coming to Ireland today and for how long I don't know.

 

Thanks again from Aubrey.  


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#56 KMA

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Posted 09 December 2022 - 10:12 AM

very nice pictures Rutilus

the red color is nicely seen.

 

R Leonis is declining nicely

my five observations starts 

October 30  = 8.8 mv

November 2  = 9.0 mv

November 9 = 9.2 mv

November 22 = 9.6 mv

 December 5  10.15mv

 

 hopefully weather will

cooperate for a few more days.

 

best wishes for clear sky

KMA


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#57 KMA

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Posted 10 December 2022 - 07:17 AM

Just came back from my backyard observatory

reporting visual magnitude 10.4mv for R Leo.

For next afew days the Moon will be probably

too close for most observers to observe R Leo

but minimum is about December 16 (?)

when the Moon should not be a problem.

 

best wishes for clear sky

KMA


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#58 Rutilus

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Posted 10 December 2022 - 04:57 PM

This morning I imaged another easy to find Mira type, S Ori.

For me this LPV always shows a more orange colour on images. 

Scope used is my 150mm f/2.6 refractor with 8 second single exposure.

I hope to get more images of R Leo and S Ori over the next few months.

Attached Thumbnails

  • S-Ori-10-12-2022.jpg

Edited by Rutilus, 10 December 2022 - 05:01 PM.

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#59 KMA

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Posted 11 December 2022 - 04:42 AM

Very nice image of S Orionis

congrats.

 

Interestingly 

In 1930 period of S Ori was 413 days (AAVSO)

In 1941 period was 419 days

and latest charts show period of 434 days.

 

S Orionis is in my observing program

however most of the time I am

too lazy to go so far south.

Will try my next observing session.

 

best wishes for clear sky

KMA

 

ps

next maximum brightness will be about  

23 Feb 2023        20230223


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#60 Rutilus

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Posted 02 January 2023 - 04:27 AM

R Leo this morning. Visually with my 6 inch refractor I can still see the variable at around mag.11.0.

Took this single 5 second exposure image with my 6 inch f/2.6 refractor. Also in the image is an Air Canada

triple 7 at 33,000 feet  that got in on the act and a trail from a slow moving satellite.

Attached Thumbnails

  • R-Leo-02-01-2022.jpg

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#61 flt158

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Posted 03 January 2023 - 07:13 AM

Dramatic image, Rutilus!

And well done on estimating the minimum magnitude of R Leonis

 

Happy Hew Year and very best regards from Aubrey. 



#62 Rutilus

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Posted 03 January 2023 - 07:47 AM

Happy New Year Aubrey.  R Leo is heading to minimum in the morning sky, while S Ori

is heading to maximum in the evening sky and nicely placed for observing.

Captured this image last night. Visually in the eyepiece it was quite bright and

easily observed.

Attached Thumbnails

  • S-Ori-02-01-2023.jpg

Edited by Rutilus, 03 January 2023 - 07:49 AM.

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#63 Rutilus

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Posted 04 February 2023 - 06:18 AM

Observed R Leo last night with my 6 inch f/8 refractor at 34x power. It was very easily seen and had a wonderful deep

red tint in colour. I have read many times how bright moonlit  skies can make red stars appear brighter.

Last night I estimated its brightness at around one full magnitude brighter than recent visual observations on 

AAVSO. 


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#64 KMA

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Posted 04 February 2023 - 08:33 AM

Unfortunately I am clouded out for about three weeks now

but my first clear night R Leo it is.

Best wishes

KMA


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#65 Rutilus

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Posted 27 February 2023 - 07:37 AM

R Leo is now becoming a nice evening object. Took the image below with my achromat refractor.

R Leo appears to be getting slightly brighter?

Also took an image of S Ori, which inspite of the bright moon and Bortle 8 skies was easily seen

with the 9x50mm finder scope.

R Leo shows it usual red colour, while S Ori is showing a lovely orange tint at the moment. 

Attached Thumbnails

  • R-Leo-S-Ori-26-02-2023.jpg

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#66 flt158

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Posted 28 February 2023 - 10:13 AM

Yes, Rutilus. You're right about S Orionis. 

It is exceedingly bright these nights. 

Estimates on www.aavso.org show it's of magnitude 8.0

 

Thank you for these 2 superb images. 

 

Aubrey.  



#67 KMA

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Posted 03 March 2023 - 07:37 AM

Thanks for posting your pictures Rutilus.

As for myself

still experiencing bad weather.....

best wishes

KMA


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#68 Rutilus

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Posted 28 March 2023 - 04:22 PM

Last night I finished off observing with a look at R Leo. Wth a slightly de-focused view the variable was clearly

brighter than the two nearby mag.9 comparison stars. At certain times I glimpsed views of it with my 9x50mm

finder scopes. 


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#69 KMA

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Posted 02 April 2023 - 06:59 AM

Will observe R Leonis hopefully soon.

Did have recently two mornings 

observing a new object in my programme

BD Vulpeculae.

Deeply red star right now reaching minimum

difficult to observe visually..... (?)

 

Best wishes for clear sky

KMA

Attached Thumbnails

  • BD VUL  hist.jpg

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#70 flt158

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Posted 07 April 2023 - 04:37 PM

Hello again, everyone. 

 

I sought out a second red star of the last Thursday night 6th April: R Leonis. It has been many months since I estimated the magnitude of this famous scarlet star. There are 2 stars within my 2˚ fov that have magnitudes 7.8 and 7.7. I could see that R Leonis is a little bit brighter, and I have given it a magnitude of +7.5 on www.aavso.org.

R Leonis does not have an intense rich red colour when compared with S Cephei. But it is still very much a marvellous sight to behold.

By the way I hadn’t observed R Leonis since the 6th June 2022, and that was from my back garden. Right now this famous variable M class star in getting brighter and at a quicker rate when compared to S Cephei. Its period is 312 days versus 485 days. I showed one friend R Leonis on Thursday night.

 

I have had so many cloudy nights recently. 

But it was nice to see this old friend again. 

Last year its reached +6.1 for yours truly. 

I wonder if I will see it reach maximum brilliancy. idea.gif scratchhead2.gif

 

Clear skies from Aubrey. 


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#71 Rutilus

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Posted 09 April 2023 - 06:53 AM

Aubrey -  Yes, R Leo is on an upward track. Last night I had no problems seeing it in the eyepiece

of my 9x50 finder scope.


Edited by Rutilus, 09 April 2023 - 06:54 AM.

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#72 Rutilus

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Posted 09 April 2023 - 06:55 AM

Will observe R Leonis hopefully soon.

Did have recently two mornings 

observing a new object in my programme

BD Vulpeculae.

Deeply red star right now reaching minimum

difficult to observe visually..... (?)

 

Best wishes for clear sky

KMA

I hope to get some good views of BD over the summer months.


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#73 flt158

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Posted 09 April 2023 - 07:43 AM

Aubrey -  Yes, R Leo is on an upward track. Last night I had no problems seeing it in the eyepiece

of my 9x50 finder scope.

Hello Rutilus. 

 

Do you know what eyepiece magnification do you have for your finder scope?

Thank you. 

 

Aubrey. 



#74 Rutilus

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Posted 09 April 2023 - 09:30 AM

Aubrey - I use a 15mm eyepiece with my finder. However it's non standard, as I have modified it to sit lower

in the diagonal so that it reaches focus..


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#75 Rutilus

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Posted 14 April 2023 - 07:33 AM

Single frame image of R Leo from last night with my achromat refractor and DSLR camera. 

Attached Thumbnails

  • R-Leo-13-04-2023.jpg

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