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I/40 WASHINGTON 20 Catalog (Morgan, 1933)
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Results of observations with the nine-inch transit circle 1913-1926.
Catalogue of 9989 standard and intermediary stars, Miscellaneous stars.
Morgan H.R.
<Publ. USNO, 2nd series, vol. XIII, Washington (1933)>
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ADC_Keywords: Meridian observations ; Positional data ; Historical catalog
Description:
This catalogue contains the two parts: the 9989 first stars are the
standard and intermediary stars, +90 to -36 degrees of declination,
observed in the years 1913 to 1926, and reduced without proper motion
to the equinox 1920.0 ; the second part (stars numbered 9990 to 10571)
are 582 miscellaneous stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 76 10571 The catalog of (9989 + 582) stars.
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq [1,10571] Running number
6- 13 A8 --- DM Durchmusterung (BD or CD) identification
14- 15 A2 --- Sp Spectral type, from HD
16- 18 A3 --- NumSp Coded spectral type (1)
19- 23 F5.2 mag Vmag ? Magnitudes (from Harvard Revised Photometry
or corrected BD)
24 A1 --- n_Vmag [v] for variable star
25- 28 F4.2 mag ObsMag ? Observed magnitude
29- 30 I2 h RAh Right Ascension B1920 (hours), at Epoch
31- 32 I2 min RAm Right Ascension B1920 (minutes), at Epoch
33- 38 F6.3 s RAs Right Ascension B1920 (seconds), at Epoch
39- 45 F7.4 s/a pmRA ? Annual proper motion in RA (in Boss system)
46 A1 --- DE- Declination B1920 (sign)
47- 48 I2 deg DEd Declination B1920 (degrees)
49- 50 I2 arcmin DEm Declination B1920 (minutes)
51- 55 F5.2 arcsec DEs Declination B1920 (0.01arcsec)
56- 61 F6.3 arcsec/a pmDE ? Annual proper motion in Dec (in Boss system)
62- 64 I3 --- o_RAs Number of observations in RA
65- 67 I3 --- o_DEs ? Number of observations in Dec (2)
68- 71 I4 0.01a EpRA-1900 Mean Epoch of Right Ascension
72- 75 I4 0.01a EpDE-1900 ? Mean Epoch of Declination (2)
76 A1 --- Note [*] indicates a note in the catalog
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Note (1): the numeric spectral type exists only for stars 1-10400;
it is coded on 3 bytes as follows:
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Byte#16 Byte#17 Byte#18
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R=0 a or 0=0
Oe5=1 b or 1=1
O=2 c or 2=2
B=2 d or 3=3 *=3
A=4 e or 4=4
F=5 5=5 e=5
G=6 6=6
K=7 7=7
M=8 8=8
N=9 9=9
S=- p=-
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Special cases:
Mb=83 Mc=88, Md=8 5, Me=8-5,
Np=9 -
Note (2): the value is not specified when it is identical to the
corresponding number for RA.
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History:
The catalogue was originally keypunched at the Astronomisches
Rechen-Institut, Heidelberg, Germany, in the 70's. It contained 10400
stars, i.e. 171 stars were missing (note from Richard Swifte, Royal
Greenwich Observatory, October 1981). The missing stars were added in
June 1998, with the help of an Optical Character Recognition system.
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(End) Francois Ochsenbein, James Marcout [CDS] 10-Jun-1998