Sirius b: Visible or not????

davidpretorius · #1 15-02-2006, 03:48 PM

Very lucky boy last night 9/10 seeing at times. Didn't want to waste it, so made sure i was doing my star test. Did them at 250x and 500x.

Did one on Sirius A and got beautiful rings. Tweaked the collimation and then focussed and bullseye, lovely stuff.

As i was hand guiding to keep the star in the fov, i kept noticing a pin point similiar to the 'e' of 'f' stars in the trap.

Reading thru the AS&T today at lunch and they have a picture of Sirius A and Sirius B.

Is it possible to visually see it with a 10" newt, of did i observe an internal reflection. Collimation was spot on, Seeing 9/10?????

ving (David) · #2 15-02-2006, 03:54 PM

sure dave, i have done it visually in my 8". damn is tricky tho, but if things are really stable it should be doable. it'll be a tiny blip within your defraction rigs or burried within a spike

keep at it

I have a thread somwhere about finding it

davidpretorius · #3 15-02-2006, 04:11 PM

awesome ving,

like rigel type separation or further out?

ving (David) · #4 15-02-2006, 04:16 PM

close dave, alot closer than rigel...
heres the thread, my report is there, narayan has apic too
http://www.iceinspace.com.au/forum/s...ght=sirius+pup

davidpretorius · #5 15-02-2006, 04:27 PM

thanks ving, i did not see then, but know where to look. I have made a few aperture marks, so i will try this.

I was so happy with collimation at 250x as the diffraction spikes extended past the fov, so now i have to reduce them!

RAJAH235 · #6 15-02-2006, 05:30 PM

damn hard to split, at about mag 8, but can be done with the correct ap mask. Make a few of diff 'plane shapes', (square,hex etc), & try rotating each to 'move the diff spikes'... only ever saw it in a 14" SCT... long time ago... Hope you get it.

L.
ps. Was done with a FULL shaped, aperture mask,(ie; 14" hexagon, I think it was), not a reduced one.

Argonavis (William) · #7 15-02-2006, 06:24 PM

Filters do a rather good job of bringing out Sirius B - an UHC or ultrablock, even an OIII. Colour filters less so. You don't want to stop down the aperture with a filter. After picking it up with a filter, it is sometimes easy then to view it without a filter.

mickoking · #8 15-02-2006, 10:20 PM

Quote:

Originally Posted by Argonavis

Filters do a rather good job of bringing out Sirius B - an UHC or ultrablock, even an OIII. Colour filters less so. You don't want to stop down the aperture with a filter. After picking it up with a filter, it is sometimes easy then to view it without a filter.

I might try it with skyview and OIII. I've been trying to view Sirius B with my 120mm Refractor.