The star maps below give a graphic representation of Flamsteed's catalog, one constellation at a time, illustrating some of the features of the catalog described on the previous page. They use the equatorial coordinate system corresponding to the catalog's equinox of 1690.0.

Ordinary stars from Flamsteed's catalog are represented at the positions given by Flamsteed by blue disks. The bright stars from the Yale Bright Star Catalogue and less bright stars associated to Flamsteed stars are represented by black crosses at the positions given by the Hipparcos Catalogue, brought back to the epoch 1690.0 according to their proper motion and precessed to the equinox 1690.0. Each Flamsteed star is linked to its corresponding cross, if any, by a line segment. Flamsteed's positions are so accurate that the line segment is often invisible and the cross falls almost exactly at the center of the circle.

The radius of the disk is proportional to the magnitude assigned to the star by Flamsteed. For magnitudes given as a range, I have used an interpolated value according to the common convention which translates the range 3-4 to the value 3.33 and 4-3 to 3.66, for instance. For some stars, the magnitude is replaced by the abbreviation tel (telescopic), obs (obscure), neb (nebulous), or completely absent. In these cases, I have replaced the icon by a borderless disk and used an arbitrary magnitude value according to the following table.

MagnitudeValueColorCases
tel8.0blue7 Ari
obs7.0blue7 Cap, 10 Cap, 12 Cap
neb4.0yellow33 And, 55 And
none6.0blue(10 cases)

The maps also represent as red disks the positions corrected or supplied by F. Baily in his updated version of the British Catalogue, as explained on the previous page. These corrections bring all the existing stars of the catalog in pretty good agreement with their modern positions.

Modern constellation boundaries precessed to the equinox 1690.0 are represented for reference. Flamsteed designations are given (in blue, or red if the position has been corrected) for the stars of the constellation under consideration and stars from neighboring constellations that fall within its modern boundary. The label includes the constellation abbreviation when it doesn't match the modern constellation corresponding to the star's position.

With these conventions in place, all the Flamsteed stars appear on the maps except 5 Cyg and 38 Cyg which remain without position even after applying the corrections (they are listed as non-existent anyway). The other non-existent stars appear as lonely disks. The wildly erroneous position of 33 Com from Flamsteed's catalog is not represented. Duplicate entries are clearly recognizable by their double labels on the map corresponding to their actual constellation.

The maps are arranged in the same order as the constellations in Flamsteed's catalog.

Aries
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ARI
Taurus
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TAU
Gemini
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GEM
Cancer
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CNC
Leo
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LEO
Virgo
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VIR
Libra
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LIB
Scorpius
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SCO
Sagittarius
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SGR
Capricornus
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CAP
Aquarius
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AQR
Pisces
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PSC
Cetus
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CET
Eridanus
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ERI
Orion
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ORI
Lepus
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LEP
Monoceros
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MON
Canis Major
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CMA
Canis Minor
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CMI
Puppis
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PUP
Hydra
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HYA
Crater
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CRT
Hydra (cont.)
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HYA_
Corvus
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CRV
Sextans
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SEX
Centaurus
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CEN
Lupus
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LUP
Piscis Austrinus
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PSA
Cassiopeia
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CAS
Andromeda
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AND
Triangulum
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TRI
Perseus
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PER
Camelopardalis
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CAM
Auriga
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AUR
Lynx
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LYN
Leo Minor
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LMI
Ursa Major
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UMA
Draco
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DRA
Coma Berenices
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COM
Canes Venatici
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CVN
Bo├Âtes
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BOO
Corona Borealis
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CRB
Ursa Minor
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UMI
Hercules
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HER
Serpens Caput
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SER1
Serpens Cauda
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SER2
Ophiuchus
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OPH
Lyra
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LYR
Aquila
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AQL
Sagitta
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SGE
Vulpecula
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VUL
Cygnus
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CYG
Delphinus
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DEL
Equuleus
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EQU
Pegasus
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PEG
Lacerta
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LAC
Cepheus
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CEP

Acknowledgments.

  • This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in A&AS 143, 23.
  • This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.