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1994-06-02
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Preliminary Version of the Third Catalogue of Nearby Stars
Wilhelm Gliese and Hartmut Jahreiss
Astronomisches Rechen-Institut Heidelberg, Germany
The present version of the CNS3 contains all known stars within 25 parsecs
of the Sun. It depends mainly on a preliminary version (Spring 1989) of the
new General Catalogue of Trigonometric Parallaxes (YPC) prepared by Dr.
William F. van Altena (Yale University).
The catalogue contains every star with trigonometric parallax greater than or
equal to 0.0390 arcsec, even though it may be evident from photometry or for
other reasons that the star has a larger distance. For red dwarf stars, new
color-magnitude calibrations for broad-band colors were carried out and
applied. For white dwarfs, the recipes of McCook and Sion in ApJS, 65, 603
(1987) were applied. Stroemgren photometry was used (not yet
systematically) for early-type stars and for late dwarfs, the latter
supplied by E. H. Olsen from Copenhagen Observatory (private communication).
Contrary to the CNS2 (Gliese 1969) trigonometric parallaxes and photometric
or spectroscopic parallaxes were not combined. The resulting parallax in the
present version is always the trigonometric parallax -- if the relative error
of the trigonometric parallax is smaller than 14 percent. The resulting
parallax is the photometric or spectroscopic parallax only if no trigonometric
parallax is available or if the standard error of the trigonometric parallax
is considerably larger.
Catalogue Description
Column
1 - 8 Identifier
col. 1,2 : Gl Gliese: CNS2, Veroeff. ARI Nr. 22 (1969)
GJ Gliese & Jahreiss, A&AS, 38, 423 (1979)
Wo Woolley et al., Roy. Obs. Ann. No. 5 (1970)
NN newly added stars (not yet numbered)
9 - 10 Components (A,B,C,... )
11 Reliability of the distance
s: trig. parallax > 0.0390 and phot. parallax < 0.0390
x: trig. parallax > 0.0390 and phot. parallax < 0.0190
p: trig. parallax < 0.0390 and phot. parallax > 0.0390
q: trig. parallax < 0.0390 and phot. parallax(:) > 0.0390
13 - 20 Right ascension (B1950.0)
22 - 29 Declination (B1950.0)
31 - 36 Total proper motion (arcseconds per year)
38 - 42 Direction angle of proper motion
44 - 49 Radial velocity (km/sec)
51 - 53 Remark -
var variable (?) radial velocity
SB? suspected spectroscopic binary
SB spectroscopic binary
55 - 66 Spectral type or color class
67 Selected sources -
K Kuiper Type (see ApJS, 59, 197, 1985)
L San-Gak Lee (AJ 89, 702, 1984)
O objective prism MK type (but not Michigan type)
R Robertson type (AJ, 89, 1229, 1984)
s Stephenson type (AJ, 91, 144, 1985 and
AJ, 92, 139, 1986)
S Smethells type (IAU Coll. No 76, p. 421, 1983)
U Upgren et al. (AJ, 77, 486, 1972)
W Mount Wilson type
68 - 73 Apparent magnitude
74 Code -
P photographic
* photometric
c calculated or transformed
v variable
: uncertain
75 J : joint magnitude
76 - 80 B-V color
81 Code -
* photographic
c calculated
: uncertain
82 J : joint color
83 - 87 U-B color
88 Code -
c calculated
C from 'Cape refractor system'
: uncertain
89 J : joint color
90 - 94 R-I color (Kron's system)
95 Code -
C in Cousins' system
t transformed from another system
: uncertain
96 J : joint color
97 - 101 Trigonometric parallax (F5.4)
102 - 105 Standard error of trig. parallax (F4.4)
107 - 111 Resulting parallax (F5.4)
112 - 115 Standard error of res. parallax (F4.4)
116 Code -
r parallax from spectral types and broad-band
colors
w photom. parallax for white dwarfs
s photom. parallax from Stroemgren photometry
o photom. parallax from Stroemgren photometry
calculated by E. H. Olsen
p photom. parallax from other colors
118 - 122 Absolute visual magnitude, M(V)
123 Code, copied from col. 74
124 Code, copied from col. 75
125 Quality of absolute magnitude
a s.e. < 0.10 mag
b 0.11 < s.e. < 0.20
c 0.21 < s.e. < 0.30
d 0.31 < s.e. < 0.50
e 0.51 < s.e. < 0.75
f 0.76 < s.e.
128 - 131 U space velocity component in the galactic plane and directed
to the galactic center
133 - 136 V space velocity component in the galactic plane and in the
direction of galactic rotation
138 - 141 W space velocity component perpendicular to the plane and in
the direction of the north galactic pole
143 - 148 HD number
150 - 160 Durchmusterung number
BD : Bonner Durchmusterung
CD : Cordoba Durchmusterung
CP : Cape Photographic Durchmusterung
162 - 170 Giclas number
172 - 176 LHS number
178 - 182 Number according to code in col. 179
V : Vyssotsky number
U : UGPMF number (see AJ, 77, 486, 1972)
W : white dwarf (EG or Gr number)
184 - 252 Additional identifications (LTT, LFT, Wolf, Ross, etc.)
and remarks
Description prepared by Hartmut Jahreiss, Astronomisches Rechen-Institut,
Moenchhofstrasse 12-14, D-6900 Heidelberg 1, GERMANY.