Table information for 'fk6.part1'

General

Table Description: Part I of the FK6 (successor to Basic FK5)

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: Parts I and III of the sixth fundamental catalog, a catalog of high-precision astrometry for bright stars combining centuries of ground-based observations as reflected in FK5 with HIPPARCOS astrometry. The result contains, in particular for the proper motions, statistically significant improvements of the Hipparcos data und represents a system of unprecedented accuracy for these 4150 fundamental stars. The typical mean error in pm is 0.35 mas/year for 878 basic stars, and 0.59 mas/year for the sample of the 3272 additional stars.

For a list of all services and tables belonging to this table's resource, see Information on resource 'The Sixth Fundamental Catalogue (FK6)'

Resource Reference URL: ARI FK6 pages

Citing this table

@MISC{vo:fk6_part1,
  year=2008,
  title={The Sixth Fundamental Catalogue (FK6)},
  author={{GAVO} Data Centre},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/fk6.part1},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Copyright, License, Acknowledgements

• To the extent possible under law, the publisher has waived all copyright and related or neighboring rights to the FK6 data. For details, see the Creative Commons CC0 1.0 Public Domain dedication. Of course, you should still give proper credit when using this data as required by good scientific practice.

  
• https://spdx.org/licenses/CC0-1.0.html

Resource Documentation

Columns

Sorted by DB column index. [Sort alphabetically]

Columns that are parts of indices are marked like this.

VOResource

VO nerds may sometimes need VOResource XML for this table.

Notes

• Note V

  A nonempty varFlag field indicates that the star is variable with an amplitude of

  1:

  < 0.06 mag

  2:

  0.06 .. 0.6 mag

  3:

  > 0.6mag

• Note M

  K_bin is a flag for the double-star nature of the object: K_bin = 10d1+d2

  First digit d1

  The first digit d1 describes the information on the double-star nature based on the proper-motion differences Delta_mu. The method and the meaning of the corresponding test parameters F are explained in 1999A&A...346..675W.

  1:

  all values of F (F_FH, F_0H, F_0(GC)H, F_0F) are below 2.49

  2:

  at least one value of F (F_FH, F_0H, F_0(GC)H, F_0F) is larger than 3.44

  3:

  all other (intermediate) cases

  Second digit d2:

  The second digit d2 describes the information on the double-star nature based on various other methods. If the data indicate various kinds of binarity, the 'astrometrically most disturbing' effect is given.

  1:

  single star indicated

  2:

  the star is a member of a visual binary (gravitationally bound system), or the object is resolved by speckle interferometry

  3:

  the object is suspected to be a visual binary (mainly due to HIPPARCOS)

  4:

  the star has at least one optical companion with a separation of rho<60 arcsec

  5:

  the star has at least one optical companion, but all companions have a separation of rho >= 60"

  6:

  astrometric binary (mainly the non-standard solutions O, G, V, X of HIP)

  7:

  spectroscopic binary with a known orbit, or the star is an eclipsing binary

  8

  the radial velocity of the star is variable (indicating a spectroscopic binary), or the object shows a composite spectrum (indicating a double star)

  9:

  the radial velocity of the star may be variable (possible indication for a spectroscopic binary), or the object may show a composite spectrum (possibly indicating a double star), or other weak indications of binarity, or the star has a (suspected) planetary companion

• Note D

  K_Delta_mu is a flag for the double-star nature of the object based on differences between (see 1999A&A...346..675W).

  1:

  single-star candidate

  2:

  Delta_mu binary

  blank:

  uncertain (between 1 and 2), or the binary nature which is indicated by other data does not allow to classify the object as a single-star candidate