Tasco 10TE-5 - Page 8

hour circle
so lhor
4'00
(oursr
circle)
is oPposib
rhe
hoi:r circle
indicotor.
Clohp lh€
hour oxis
tishi ond
wirh ihe
flexible .onhol
the
hour oxis is odvonced
ro 7'00.
Use
the wjde
view eyepiece
(60n
to locote
rhe
stor
in
rhe field of
view Use tlexible
conrols
ro brins
the siors to
fie intelseclion
of
the
cross'hoirs
of the
findeGcope.
Now,
vou
con follow
lhe stor
for
long
perlods
of
rime by only
odvon€ins
rhe holr
oxis
wiih
the
flexible control.
lf
you
hove
ihe eleclric
clock
drive
it con
now be engosed
ond
will
follow
CALCULATINO
HOUR AXGLE
As in oll
moihemotics,
it i5
normol to slbsrrod
lhe
smoller
number from
rhe lorger one
li
sidereol
time
is the lorger,
subtroct
R.A.
The resuh
will indicote
hours
west of rhe
meredion
Wlen it h
necessory
to slbstrdcl
tine
lrom RA
the resutt h
hours eo$ of
ihe
meridion.
Usuolly,
if the
resuhs of
rhe colculotions determine
o
"west"
reodins
the telescope
I
pldced on the
eosi
side of
the lripod.
With o
west colculolion
the
hours
increose
lrom sidereol
iime.
lf the resulis
o{ the colculolion
determine
on
"edst"
reoding
lhe telescope
is
Ploced
on
the
wet
side
of the
rripod. The setlings
o.e
lhe some
os
before excepr
thoi the
houE will
detreose
lrom
sidsreol
iime so thol
il is necesory
to sublroct
rother
POSITION
FROM A
GUIDE
SIAT
lhe
quklesl
ord
probobly lhe eosiesr
wov
rot
lindins
your sty subieos
is f
om
d
guide tor
Tha
ii onoiher
system
for roking odvontoge
of
rhe seiiing
circles
wiiholr fie necessory
orithmeiic,
nor is
it
necessory
to determine
sidereol
time. wnh this
system
it is only necessory
to cenler o
lomilior sior
or
Plonet
in
ihe {ield of
the telesope by
odiusting
the hour
ond declinotion
ongles
monuolly.
Next slip
tu.n the
holr
.ncle to the R.A.
os cotologued
Withour
orith'
freric yo! hove
now *t
your relescoPe corectly
in
sidereol
iime ond
you
con
now index
ro
orher
slors
in thol oreo of
the sky
by either
indexing
merhdd
previously e!pldined-
Excellent
books
to o$ist
you
in the use
oi
your
telescope
ore ovoiloble
We
po iculorly
recommend
Nolticol
Almondc,
wriie io
U.S Printing
Oflice,
Woshington,
D.C.
Obseiver
Hondbook,
write to
Royol
Astronomicol
Scciely,
Toronto,
Conodo
sky
Publishins
Corp,
wlite
io Horvord
Collese
Obsedolory,
Combridge,
Mossochusens
SU
FROJECIION
SCREEN
For prolongeo solo.
obsNorions,
rhe sun's
iioqe
con be
p'oiec'ed onro
the sJn
proPec.ron
ereen
Assenble the sun
screen
05 shown
in Fisurel
Mounl
the collor on
the end oi
the
focusing
tube
Screw
rhe eye
lens odopter
in
ploce lnsed
the
dioqonol
prism
ond
20/VlM
eyepiece
with
lhe sun
filter
in
ploce.
Focus
ihe telescope
on
the sun
bv
:igf
irq
lhroJg'
ll-e eyeoiece
W\e.
lhe
sn is
fo;Ger.
€mo'e
the 20MM
eyepiece
ond
insert
ihe
12.5
eyepiece
in the diogonol
prism ond
tur'
lhe
prism
r lhoi
the
imose is
thrown on
the surfoce
ol
ihe
D
oi".lio"
(reen.
Re'ocus unnl
the iroge
is
sl'orp on
lhe
ptoecnol
(reen
The
olhet
eve
lerses
moy be
used
for dif{erent
powers
of mogniti'dtion
CONYERTING
TO
SIDETEAI
TIME:
On onorher
pose we
hove
incLlded
o sidereol
conveGion
iime chort bosed
upon
8
PM your
Locol
ln ofder
io convert
to
Sidereol
Time ii
is tirst
necesso.y
lo determine
your locol
Meon
Time
lf
vou
ore
Lucky enough
to be
locoted
on o
Time
zone
verldion
vour
problem is
solved
becor-rse
vour
Locol
Meon
Time will
be
the some os
vour
Stondord
Time'
lf your clry
is
locoted
in the
list ol
geogrophicol
locotions
you con determine
your
time corre'tion
srno,/
bv derernit
ing
/out
posilron
edst or
xesl
o'
vou
ne 7o_F
Veadion.
LGor
Meon
TrmF
is
colculoled
bv
o co(eclion
equivdlent
to
4 minutes
for eoch desree
lhot
you ore owoy
trom
the
Zone
Meridion.
l{
vou
ore
wen
ol
ihe
Time Zone
Meridion
Locol
Meon
lime eqools
Stdndord
Time MINUS
corredion
time.
l{
you
ore
eost ol
rhe Time
Zone
lleridon,
Locol
Meon Time
equok
Stondord
Time
PLI.JS corection
lime.
For exomple,
Columbio,
Missouri, is
2'20'
wesr of
lhe Time
Zone Meridion
This
meons
thot we
nust
odd
9
minutes
from Stondord
Time. lI we
ossume
lhot it is I
P.M. Slondord
Time
our coriection
shows
rhoi the
Locol Meon
Time
equo s 8,09
Chicoqo
is
2'22" eost
of the Time
Zone
Msridion
ond.
rherefore,
n
would be
necessorv
to dedlct
9
minrtes to Sionddrd
Time
which sfiows
thot Locol
Meon
Time is 7,51.
Aller vou
hove determined
vour
Locol Meon
Time
lor 8 P.M.
it is simply
o
motter ol
relerring
ro rho
sidereol conversion
chort lo
set
vour
wot.h 01
correcr
sidereol
time {or
the dote ond
month of
obseryotion.