Coordinates data are expressed according to WDS standard:

coord_2000:         The  hours, minutes, and tenths of minutes of Right 
                    Ascension for 2000, followed by the degrees and minutes of
                    Declination for 2000, with + and - indicating north and
                    south declinations. The positions given represent our best
                    estimates of these values. Where possible, these are based
                    on the ACRS and PPM data, with proper motion incorporated.

coord_arcsec_2000:  The hours, minutes, seconds and tenths of seconds (when
                    known) of Right Ascension for 2000, followed by the degrees,
                    minutes, and seconds of Declination for 2000, with + and - 
                    indicating north and south declinations. The positions given
                    represent our best estimates of these values. Where 
                    possible, these are based on the Hipparcos and Tycho data, 
                    with proper motion incorporated. While the arcminute 
                    coordinate (columns 1-10) refer to the primary of a multiple
                    system, the arcsecond coordinate (columns 113-130) refer to
                    the primary of the subsystem. For example, while the BC pair
                    of an A-BC multiple will have the same 10 digit WDS 
                    coordinate, the arcsecond coordinate of the BC pair will be
                    at the "B" position.

Searches

Add these prefixes to the search box on the left side to restrict the range of searches:

WDS hhmms+ddmm
STF or STRUVE nnnn
TYC or TYCHO nnnn-nnnnn-n
HR nnnnn
HD nnnnn
SAO nnnnn
HIP nnnnnn

Burnham to WDS IDs