hi this is Graham from Jenham's Astro the idea of this video is to see what news
we can get of double stars using this telescope the Skywatchers skymax 127
all we're going to do is going to take the basic scope and attach a digital SLR
so you might recall that the visual back on this scope has a thread on it for
attaching to a t-ring so I've got a t-ring here for my Canon camera and
I'm simply going to attach the camera like so onto the back of the scope so it
give us a nice secure attachment next I'm going to put this onto an equatorial
mount and we're going to talk around some of the more popular double stars
that are high in the sky here in the UK during the summer
okay so let's just focus a little bit on Vega to start with the camera on the
back of the scope using the live view
it's about right
okay so let's go for Albireo in Cygnus
so this is a two second frame taken with the camera speed at ISO 1600 and they in
nicely captures what's probably the most famous double star certainly whatever is
popular double stars in the northern hemisphere if i zoom in a little bit you
can see there we've got a nice view of the amber primary magnitude 3 and blue
Mag 5 secondary there 35 arc seconds apart and an easy split for the for the max it
off okay so let's go from Albireo to 61 Cygni
so this is 61 Cygni as two seconds again this time iso:3200 and you can see the
two dwarf stars similar magnitudes and they get back to you five and six and if
we zoom in a little bit I'd say they appear to my eye at least they appear to
be orange next we're gonna go from 61 Cygni to Epsilon Lyrae double-double
Epsilen Lyrae the double-double so if we take a closer look at this frame
what had to do here is take a whole series of exposures with getting shorter
exposures and slower and slower exposure speed in order to try and capture the
fact that each of these is actually a double so I think just about see there
that we've resolved each of the pair's they're about two arc seconds apart and
this is now a third of a second iso100 so the stars to me look pretty well
white maybe a little bit yellow and there it is my split of the famous
double-double
and now let's go off to the hunting dogs to have a look at cor caroli
so this is Cor Caroli it's one second
exposure with speed of ISO 200 now there's quite low down in the sky for me
this one and I think if we zoom in we can see we started to see a bit of false
color on these two stars so we've got a magnitude 2.9 and max you 5.6 about 20
19 or 20 arc seconds apart and I think in theory they're blue white and yellow
but to me you'll see there's a bit of a bit of a mixture of the spectrum
recorded on this image false color for sure okay and now let's head off to
Delta Cephei
so Delta Cephei this is a one second frame iso 800 and well it's a famous
Cepheid variable, the prototype for that type of star and the two components are
yellow and blue we take level at the closer look I think that the max stops
recorded the color quite well but now this is these stars are much higher in
the sky for me at the moment so we're not getting the false color that we saw
on the previous target
and finally let's go back to Ursa Major and Mizar
and they're moving on to the great bear here is Mizar and its companion Alcor
a naked I double test at visual acuity for many many years this is a one-second
frame iso 400 and if a zoom in a little bit onto Mizar we can see its companion
star effect so it's a multiple star system and but this is the brightest
component that we can see next to Mizar
so I'm quite happy with the results we've managed to get even though we've
been limited in terms of magnification so the view we get with the digital SLR
I think you can see that if you hook up an eyepiece and maybe if you use Barlow
lens you're gonna get an even better view of a lot of these double stars. The Mak
is clearly suited to that kind of object and certainly not just for
looking at planets so hope it's been useful get up there and look at those
double multiple stars don't neglect those objects some lovely colors it's
been full moon for the observations I've taken in this video so it's one of those
one of those targets that you can still get good views on and get good astronomy
done even when the sky is relatively light because of the Moon so hope it's
been useful thanks for watching