 |
 |
 |
 |
 |
 |
|
Ga8-21 |
Ga8-22 |
Ga8-23 |
Ga8-24 |
Ga8-25 |
Ga8-26 |
|
λ Lyrae
(287.7),
Ascella
(287.9) |
|
ι Lyrae
(289.5) |
Aladfar
(291.1) |
θ Lyrae
(291.8) |
|
|
'26 |
19h (289.2) |
'28 |
'29 |
'30 |
'31 |
|
"November 1 |
"2 |
"3 |
"4 |
"5 |
"6 (310) |
Allen:
"ε¹,
or Fl. 4, Binary,
4.6 and 6.3, yellow
and ruddy; ε², or
Fl. 5, Binary, 4.9
and 5.2, both white.
These are the
celebrated Double
Double, each
pair probably
separately revolving
in a period of over
two hundred years,
and both pairs
perhaps revolving
around their common
centre of gravity;
but if so, the
period is to be
reckoned only by
milleniums, for the
measures of the last
fifty years show no
sensible orbital
motion. This is by
far the finest
object of the kind
in all the heavens.
They are 207" apart,
and, to the ordinary
eye, form an
elongated star; but
exceptionally sharp
sight will resolve
them without aid ...
Their
'double-double'
character was first
published by the
Jesuit father
Christian Mayer in
1779, although its
discovery has
generally been
attributed to Sir
William Herschel ...
Between these stars
lie three very much
fainter, two of
which, of the 13th
magnitude, are the
Debilissima,
Excessively Minute,
of Sir John
Herschel, discovered
by him in 1823."
I cannot see any
sign of double stars at or
around Ga8-17. A suitable visual
cue might have been e.g. pu
or puo:
 |
 |
|
pu |
puo |
However, the type
puo presumably
means 'hilled up' -
implying not visible
- and the pu
type presumably
'hole' - implying
not there.
A more
suitable type of
glyph is kea,
with 'twin faces'
looking at each
other:
 |
|
kea |
 |
 |
 |
 |
|
Gb7-28
(*30) |
Gb7-29 |
Gb7-30
(441) |
Gb7-31 |
|
Alamak
(29.7)
|
Hamal
(30.5) |
Vega
(281.8) |
|
|
2h
(30.4) |
'April
21
(111) |
'December
28
(362) |
'29
(363) |
|
|
|
"October 26 |
"27
(300) |
