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Compute
Distance ρ
Position angle θ
Distance (x,y)
Galactic
J2000
B1950
Ecl. J2000
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Simple Target
List Of Targets
Fast Xmatch with large catalogs or Simbad
Target
Name (resolved by
Sesame
) or
Position
:
J2000
B1975
B1950
B1900
B1875
B1855
Galactic
Supergal.
Ecl.J2000
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deg
arcmin
arcsec
NB: The epoch used for the query is the original epoch of the table(s)
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I/255
55052
The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99)
ReadMe+ftp
Similar Catalogs
Post annotation
1.
I/255/out
The GSC-ACT Full Catalogue (25241730 positions)
(25241730 rows)
meta
I/255/out
The
GSC-ACT
(or
GSC1.3
)
is a recalibration of the
GSC1.1
, the catalogue constructed to support the operational need of the Hubble Space Telescope, with the
ACT
, the combination of the Astrographic Catalogue and the
Tycho
catalogue derived from the
Hipparcos
mission; see
http://www.projectpluto.com/gsc_act.htm
for more details about this recalibration.
Simple Constraint
List Of Constraints
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Constraints
applied on Columns
(
Output Order:
+
-
)
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Column
Constraint
Explain
(
UCD
)
GSC
(i)
GSC designation
(Note)
(
meta.id;meta.main
)
(
ID_MAIN
)
RAJ2000
deg
(i)
Right ascension in J2000, epoch of plate
(
pos.eq.ra;meta.main
)
(
POS_EQ_RA_MAIN
)
DEJ2000
deg
(i)
Declination in J2000, epoch of plate
(
pos.eq.dec;meta.main
)
(
POS_EQ_DEC_MAIN
)
PosErr
arcsec
Mean error on position
(
stat.error
)
(
ERROR
)
Pmag
mag
(i)
photographic magnitude (see n_Pmag)
(
phot.mag;em.opt
)
(
PHOT_PHG_MAG
)
e_Pmag
mag
Mean error on photographic magnitude
(
stat.error;phot.mag;em.opt.U
)
(
ERROR
)
n_Pmag
[0,18] Coded passband for magnitude
(Note)
(
meta.note
)
(
NOTE
)
Class
[0,3] Class of object (0=star; 3=non-stellar)
(
src.class
)
(
CLASS_OBJECT
)
Plate
(char)
Plate designation
(Note)
(
obs.field
)
(
ID_PLATE
)
Epoch
yr
(n)
Epoch of plate
(Note)
(
time.epoch
)
(
TIME_EPOCH
)
Mult
(char)
[TF] True if multiple object / False otherwise
(
meta.code.multip
)
(
CODE_MULT_INDEX
)
Versions
Get parameters of that star from all GSC versions
(
meta.ref.url
)
(
DATA_LINK
)
ALL
cols
(n)
indicates a possible blank or NULL column
(i)
indexed column
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