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V/8         Space Velocity Catalogue (Eggen 1962)
Space Velocity Catalogue
    Eggen, O.J.
    <Royal Obs. Bull. No. 51 (1962)>
    =1962RGOB...51...79E
ADC_Keywords: Space velocities


Description:
    New  "post-1900" proper motions have been derived for all of the stars
    with  known radial  velocity of  quality class  A or  B that  are also
    contained in the General Catalog (GC, catalog I/113).

    The catalog lists the space motion vectors of the 3483 stars for which
    the  differences between the pre- and post-1900 proper motions and the
    probable error  of the combined values are  small enough to cause less
    than  about 5 km/s uncertainty in the  total space motion based on the
    best available determinations of the stellar distances. In addition to
    the  weighted means of the pre- and post-1900 proper motion components
    on the N30  system, the best  available values of  the radial velocity
    and the space-velocity vectors (UVW), based on these motions and on an
    assumed  luminosity  derived  from  considerations  of  all  available
    estimates.

    Compared to the  Table 1 of the publication,  note  that the following
    elements are missing:
    - the 3rd designation of Column I
    - the spectral classifications of Column III
    - all annotations of Column VIII: the uncertainty flag  related to the
      distance modulus m-M, and also the annotations about binarity or
      clustering.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
catalog          110     3482   Table 1


Byte-by-byte Description of file: catalog

   Bytes Format Units   Label     Explanations

   1-  6  I6    ---     HD        [1/225300]? HD Cat. III/135 designation
   8- 12  I5    ---     GC        [1/33342]+  GC Cat. I/113 designation
  14- 18  F5.2  mag     Vmag      ? Visual magnitude
  19- 23  F5.2  mag     B-V       ? color index
  24- 28  F5.2  mag     U-B       ? (or (U-B)c) color index
  30- 34  I5    10-4s/a pmRA      Proper motion in right ascension (1)
  36- 40  I5    mas/a   pmDE      Proper motion in declination (1)
  41- 46  F6.1  km/s    RVel      ? Radial velocity from Wilson's GCRV Cat. (2)
      47  A1    ---     q_RVel    [AB] Quality index on RVel (2)
  49- 51  I3    mas/a   pe(pm)    ? Probable error on proper motions (1)
  52- 57  F6.1  km/s    Uvel      Component of space velocity (3)
  58- 63  F6.1  km/s    Vvel      Component of space velocity (3)
  64- 69  F6.1  km/s    Wvel      Component of space velocity (3)
  71- 76  I6   km/s/kpc DUvel     Change of Uvel with distance (4)
  78- 83  I6   km/s/kpc DVvel     Change of Vvel with distance (4)
  85- 90  I6   km/s/kpc DWvel     Change of Wvel with distance (4)
  92- 95  I4    10-3    x         Direction cosine of the radial velocity (5)
  97-100  I4    10-3    y         Direction cosine of the radial velocity (5)
 102-105  I4    10-3    z         Direction cosine of the radial velocity (5)
 106-110  F5.2  mag     m-M       ? Distance modulus (6)

Note (1): Proper motions are converted to N30 system (Morgan H.R., 1952,
          Astron. Papers Amer. Ephemeris 13, see catalog I/80)
Note (2): Radial velocities from the "General Catalogue of Stellar
          Radial Velocity", Wilson R.F., 1953 (see catalog III/21)
Note (3): The space velocity components are oriented:
     Uvel away from the Galactic centre
     Vvel in the direction of the galactic rotation
     Vvel in the direction of the North Galactic Pole
Note (4): these numbers represent the changes in the values of
     (Uvel, Vvel, Wvel) caused by an increase of 1kpc in the assumed
     distance.
Note (5): These direction cosines can be computed from the old
     galactic coordinates l (longitude) and b (latitude) by:
     x = -cos(b).cos(l)
     y =  cos(b).sin(l)
     z =  sin(b)
Note (6): the distance modulus (m-M) is related to the distance r
     expressed in kpc by:
     5.log(r) = (m-M) - 10


History:
    The catalogue was originally keypunched in November 1972 in K.I.T.
    computer center. The original version contained a first introduction
    (52 lines), and one star information laid over 3 cards. It has been
    transformed into a one-line per star at CDS in 1996; numerous
    misalignments in the data columns were also corrected in the course
    of this transformation.
(End)                                     Francois Ochsenbein [CDS]  25-Jun-1996