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In researching this article, more of these pairs were found than
can be covered in this format. This is not a complete
list, just a
sampling of some of the more troublesome or interesting pairs.
Here are a few examples for the winter
season:
S ORI 0524-04A
Two for the price of one! S Ori has two close companions.
One, NSV 02014 to the
SW, is rather bright. The other, to the SE, is faint
and marked as a possible variable on the d chart.
RU TAU 0546+15C
This variable has a close comparison/companion just NW of it.
Z TAU 0546+15A
Is on the same chart. Two variables
in the same field with close
companions!
ST AUR 0607+46A
Located in a very pretty star field, not far
away from the
popular cataclysmic variable SS Aur, this one is wedged between two close
companions also. They are the
135 comparison to the SW and a star labeled
var? to the NE.
VV GEM 0619+25
This star has a close 14th
magnitude companion. Unfortunately, it's
not shown on the currently available charts for this star. VV Gem fades
to
the mid-14's, so I'm sure this companion has confused the situation.
If you see two faint stars where only one is indicated
on the chart,
which one is the variable?
S LYN 0635+58
Scatter in the data of this variable near maximum
probably indicates
observers with smaller telescopes reporting the combined magnitude of
this star and it's close 138
companion.
SY CMA 0706-19
This is another nice star field. Plenty of bright stars in a
field peppered
with fainter and fainter stars. This one could be
considered a double variable. It has a close companion almost due W
that
varies from 8th to 14th magnitude just like SY CMa does. As if
that weren't confusing enough, these two form a small triangle
with
another suspected variable!
T CMI 0728+11
This variable has a close companion/comparison (134 var?)
which may
also be variable. Near minimum, high power will be needed to make the
observation.
RR AQR 2109-03
This variable transits a bit low for me. This makes distinguishing
its close 136 companion/comparison difficult.
DG
PEG 2158+13
This is an extremely close pair! This variable and its 14th
magnitude neighbor are the Siamese twins
of variables when DG Peg
is near minimum.
RU PEG 2209+12
Unlike EF Peg, which can be seen as a close double
only on rare occasions,
this cataclysmic variable and its partner are nearly equal in brightness
most of the time. The
relative brightness and proximity of its
companion/comparison make this a challenging star to estimate at other
times.
SV
AND 2359+39
The d chart for this star has a note at the bottom which reads,
"SV And is the preceding companion
of a close double". The companion
star is not indicated on the chart however. Try observing this one and see
for yourself
why.
Perhaps you can pass this list on to members of your astronomy clubs or
organizations who are interested
in double star observing. Who knows, you
may spark their interest in variable star observing after they witness the
changing
appearance of these interesting doubles.
My sincere thanks to Georg Comello for his insight and contributions
to
this list.
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