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	III/135A		Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989) ReadMe Similar Catalogues
1.	III/135A/catalog		The catalogue (272150 rows)

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Target Name (resolved by Simbad) or Position:

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Output preferences for Position:

	r	x,y	Position	Galactic	J2000	B1950	Ecl.J2000	none
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r and x,y are the distance to the Target;
Position is in the same coordinate system as Target.

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Column

Constraint

Explain (UCD)

recno

Record number within the original table (starting from 1) (meta.record) (RECORD)

[1/272150] Henry Draper Catalog (HD) number (meta.id;meta.main) (ID_MAIN)

(char)

Durchmusterung identification (Note 1) (meta.id) (ID_ALTERNATIVE)

RAB1900

"h:m:s"

Hours RA, equinox B1900, epoch 1900.0 (pos.eq.ra;meta.main) (POS_EQ_RA_MAIN)

DEB1900

"d:m:s"

Degrees Dec, equinox B1900, epoch 1900.0 (pos.eq.dec;meta.main) (POS_EQ_DEC_MAIN)

q_Ptm

⁽ⁿ⁾ [0/1] Code for Ptm: 0 = measured, 1 = value inferred from Ptg and spectral type (meta.code.qual) (CODE_QUALITY)

Ptm

mag

⁽ⁿ⁾ Photovisual magnitude (Note 2) (phot.mag;em.opt.V) (PHOT_PHG_V)

n_Ptm

(char)

[C] 'C' if Ptm is combined value with Ptg (meta.note) (NOTE)

q_Ptg

⁽ⁿ⁾ [0/1] Code for Ptg: 0 = measured, 1 = value inferred from Ptm and spectral type (meta.code.qual) (CODE_QUALITY)

Ptg

mag

⁽ⁿ⁾ Photographic magnitude (Note 2) (phot.mag;em.opt) (PHOT_PHG_MAG)

n_Ptg

(char)

[C] 'C' if Ptg is combined value for this entry and the following or preceding entry (meta.note) (NOTE)

SpT

(char)

Spectral type (spectral types P are generally nebulae) (src.spType) (SPECT_TYPE_GENERAL)

Int

(char)

[ 0-9B] Photographic intensity of spectrum (Note 3) (phot.count;em.opt) (PHOT_INTENSITY_ESTIMATED)

Rem

(char)

[DEGMR*] Remarks, see note (Note 4) (meta.note) (REMARKS)

Simbad

ask the Simbad data-base about this object (DATA_LINK)

Tycho

Cross-identification with Tycho-2 (Cat. IV/25) (meta.ref.url) (DATA_LINK)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

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