Mapping Toolbox

readfk5

Read the Fifth Fundamental Catalog of Stars

Syntax

• struc = readfk5(filename)
  struc = readfk5(filename,d)
  

Background

The Fifth Fundamental Catalog of Stars (FK5), Parts I and II, is a compilation of data on more than 4500 stars. The catalog contains positions, errors in positions, proper motions, and characteristics such as magnitudes, spectral types, parallaxes, and radial velocities. There are also cross-references to the identities of stars in other catalogs. It was compiled by researchers at the Astronomisches Rechen-Institut in Heidelberg.

Description

struc = readfk5(filename) reads the FK5 file and returns the contents in a structure. Each star is an element in the structure, with the different data items stored in appropriately named fields.

struc = readfk5(filename,struc) appends the data in the file to the existing structure, struc.

Remarks

Positions are given in terms of right ascension and declination. The section entitled "Astronomical Data" in Chapter 8 of the Mapping Toolbox User's Guide shows how to convert these to latitude and longitude for display by the Mapping Toolbox.

The Fifth Fundamental Catalog of Stars (FK5), Parts I and II, is available over the Internet by anonymous FTP at the following:

• ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/1/1149A/
  ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/1/1175/
  

The readme files have more complete descriptions of the data.

Examples

• FK5 = readfk5('FK5.dat');
  FK5e = readfk5('FK5_ext.dat');
  whos
    Name       Size         Bytes  Class
    FK5        1x1535     5042752  struct array
    FK5e       1x3117    10226424  struct array
  FK5e(1)
  ans = 
           FK5: 2003
           RAh: 0
           RAm: 5
           RAs: 1.1940
          pmRA: 0.6230
           DEd: 27
           DEm: 40
           DEs: 29.0100
          pmDE: -1.1100
       RAh1950: 0
       RAm1950: 2
       RAs1950: 26.5900
      pmRA1950: 0.6210
       DEd1950: 27
       DEm1950: 23
       DEs1950: 47.4400
      pmDE1950: -1.1100
      EpRA1900: 51.7200
         e_RAs: 2
        e_pmRA: 9
      EpDE1900: 46.8200
         e_DEs: 3.4000
        e_pmDE: 14
          Vmag: 6.4700
        n_Vmag: ''
        SpType: 'G5'
           plx: []
            RV: 12
         AGK3R: '38'
           SRS: ''
            HD: '225292'
            DM: 'BD+26 4744'
            GC: '48'
  

See Also

dms2deg	Convert angles from deg:min:sec to degrees
hms2hr	Convert time from hrs:min:sec to hours
scatterm	Construct a thematic map with proportional symbols

References

See references [5] and [6] in the Bibliography located at the end of this chapter.

loadmoonalb

satbath