nytecam
Postmaster
Reged: 08/20/05
Posts: 9841
Loc: London UK
|
|
here's tonight's deep but unfiltered shot [Sept 27] of chi Cyg - it's bloated through excess IR radiation. The B-type star top-right is mag 6.44 whilst Chi currently Mv5.5 according to AAVSO 
--------------------
Nytecam 51N 0.1W
Meade 30cm LX200+C8+Ha+CaK PSTs+spectrographs
SX M9+Lodestar-C CCDs/Canon 300D DSLR
My Meade astrograph-colour deepsky
My supernova discovery
My dome build/spectroscopes/DSO images/Lodestar colour images & videos
|
asteroid7
Post Laureate
Reged: 10/19/04
Posts: 4273
Loc: CT
|
|
Estimated mag on October 4: 6.0
Chi Cyg was a much brighter max.mag last time compared to this go-around. Questions: Do astronomers know why such a
great difference? Do they have any idea? Does the
period change (fluctuate) with large mag differences?
Rich
--------------------
Clear Nights "Make My Day"
4.5" f/7 APM (TMB) APO Refractor CG5 GoTo with Orion extension tube
8" Celestron CPC (two)
Eyepieces:
40mm Pentax; 24mm Tele Vue Panoptic, 18mm Tele Vue Radian, 18mm HD Ortho, 15mm Celestron Omini,14mm Pentax,10mm Tele Vue Radian, 7mm,5mm & 3.5mm Nagler; 7.4mm Tele Vue Plossl.
2.5 Tele Vue Powermate
|
RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
|
|
Rich
The maximum for Chi Cyg can vary from cycle to cycle (don't know why). Chi can reach a maximum of over 4th mag or its maximum can be below 6th mag.
Hope this helps.
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
|
Bruce MacDonald
Pooh-Bah
Reged: 01/12/06
Posts: 1126
Loc: Devizes, Wiltshire, UK
|
|
I estimated its mag as 6.3 last night (2007 October 04).
--------------------
Bruce MacDonald
Devizes, Wiltshire, UK
Per Mare Per Terras
Schneider (dkl) 10x80 Flakfernrohr, Canon 10x30 IS binoculars, Synta 80mm f/5 refractor, Televue 24mm Panoptic
|
RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
|
|
To All
Observed Chi Cyg last evening (10/6), with 12x63 bins, under hazy skies. Chi still appears to be about mag 6.2, used comp stars 60 and 64.
Clear Skies
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
|
Hubert
sage
Reged: 09/26/06
Posts: 202
Loc: Belgium
|
|
Chi Cyg = 6.2 on 05 Oct. 2007.
clear skies, Hubert
|
nytecam
Postmaster
Reged: 08/20/05
Posts: 9841
Loc: London UK
|
|
Perhaps of some interest here's some lo-res spectra via my 30cm SCT + Rainbow grating that include chi Cyg from a couple of evenings ago. Chi's profile is remarkable similar to del2 Lyr and XY Lyr also included and fairly representative of 'cool' stars - some 'hot' stars in the right hand column
SRA-type RS Cyg slected as a presumaed carbon Star seems an oddball spectral wise - anyone observing it 
--------------------
Nytecam 51N 0.1W
Meade 30cm LX200+C8+Ha+CaK PSTs+spectrographs
SX M9+Lodestar-C CCDs/Canon 300D DSLR
My Meade astrograph-colour deepsky
My supernova discovery
My dome build/spectroscopes/DSO images/Lodestar colour images & videos
|
RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
|
|
"SRA-type RS Cyg slected as a presumaed carbon Star seems an oddball spectral wise - anyone observing it"
Nytecam
Interesting spectra. In observing RS do you mean visually or with a spectroscope? I observe this star visually and its quite red and rising from minimum.
Clear Skies
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
|
nytecam
Postmaster
Reged: 08/20/05
Posts: 9841
Loc: London UK
|
|
Quote:
"SRA-type RS Cyg slected as a presumaed carbon Star seems an oddball spectral wise - anyone observing it" Nytecam
Interesting spectra. In observing RS do you mean visually or with a spectroscope? I observe this star visually and its quite red and rising from minimum. Clear Skies - Rich (RLTYS)
Yes Rich - for this forum I meant visual
--------------------
Nytecam 51N 0.1W
Meade 30cm LX200+C8+Ha+CaK PSTs+spectrographs
SX M9+Lodestar-C CCDs/Canon 300D DSLR
My Meade astrograph-colour deepsky
My supernova discovery
My dome build/spectroscopes/DSO images/Lodestar colour images & videos
|
RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
|
|
"Yes Rich - for this forum I meant visual "
Nytecam
As of 10/12 RS CYG estimated mag is 8.7. Minimum was just below 9th mag.
Clear Skies.
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
|
RLTYS
Post Laureate
Reged: 12/18/04
Posts: 4267
Loc: New York (Long Island)
|
|
To All
Observed Chi Cyg on 10/21 under clear but moomlit skies.
Estimated mag for Chi was 6.5.
Clear Skies
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
|
Previous
Index
Next
Threaded
[Re: 
Edit
Reply
Quote
