
Sig/M		volume 31	Yale Catalog of Bright Stars
				(volume 1 of 8)

31.01	Star.Doc	19k
31.02	Star.Bas	 5k
31.03	Starval.Bas	 4k
31.04	Star1.Dat      177k
31.05	Star1.Bad	10k
31.06	Ikb-1.Rom	 8k
31.07	Ikb-2.Rom	 4k
31.08	Ikb-1&2.Doc	 1k

The material was compiled by

	Dr. Wayne Warren
	National Space Science Data Center
	Code 601
	Goddard Space Center
	Greenbelt,  Maryland  20771

*****************************************************************
*								*
*		YALE CATALOGUE OF BRIGHT STARS			*
*								*
*	DOCUMENTATION FOR THE MACHINE-READABLE VERSION OF	*
*	THE YALE CATALOGUE OF BRIGHT STARS			*
*						R-SAW-7/79-36	*
*								*
*****************************************************************

The YALE CATALOGUE OF BRIGHT STARS is in the public domain, and
this documentation on the catalogue was extracted almost verbatum
from a booklet, also in the public domain, whose preparation
was funded by:

	National Aeronautics and Space Administration
	Goddard Space Flight Center
	Greenbelt, Maryland  2077l

under contract NAS 5-25369 by:

	Theresa A. Nagy
	Systems and Applied Sciences Corporation
	6811 Kenilworth Avenue
	Riverdale, Maryland  20840

This database is revision 3 of the Yale Catalogue of Bright Stars,
and it was obtained on 9 track tape on March 17, 1981 from:

	Dr. Wayne Warren
	National Space Science Data Center
	Code 601
	Godard Space Center
	Greenbelt, Md  20771

Dr. Warren says that revision 4 of the catalogue is due in late
1981, and that it will have revisions in the magnitude and color
data for about 10% of the stars.  The National Space Science Data
Center does NOT have the capability of supplying the data base
or revisions on floppy disks.

The people who funded the documentation of this catalog, and the
people who did the documentation work for a living.  PLEASE DO 
NOT MAKE THEM COMPLETLY UNPRODUCTIVE BY CALLING THEM UP FOR 
INFORMATION.

The documentation is all here in this file.  Two 
programs written in Microsoft BASIC, Version 5.2, STAR.BAS,
showing how to access the data and STARVAL.BAS, which reads all 
of the database and performs a SIMPLE check to verify database 
integrity are on this disk.  The database, called STARx.DAT, is  
on this and seven additional disks.

disk1	STAR.DOC	documentation
	STAR.BAS	sample database access program
	STARVAL.BAS	database validation program
	STAR1.BAD	BAD database on stars 0001 thru 0050
			    to show the errors that STARVAL
			    can and cannot find in the data.
	STAR1.DAT	database on stars 0001 thru 0884
disk2	STAR2.DAT	database on stars 0885 thru 2059
disk3	STAR3.DAT	database on stars 2060 thru 3234
disk4	STAR4.DAT	database on stars 3235 thru 4409
disk5	STAR5.DAT	database on stars 4410 thru 5584
disk6	STAR6.DAT	database on stars 5585 thru 6759
disk7	STAR7.DAT	database on stars 6760 thru 7934
disk8	STAR8.DAT	database on stars 7935 thru 9110

*****************************************************************
*								*
*	Table of Contents/List of Tables			*
*								*
*****************************************************************

Section 1 - Introduction . . . . . . . . . . . . . . . . . 1-1
Section 2 - Tape Contents  . . . . . . . . . . . . . . . . 2-1
Section 3 - Tape Characteristics . . . . . . . . . . . . . 3-1
Section 4 - Remarks and Modifications  . . . . . . . . . . 4-1
Section 5 - Sample Listing . . . . . . . . . . . . . . . . 5-1

Table 2-l   Tape Contents  . . . . . . . . . . . . . . . . 2-2
Table 3-1   Tape Characteristics . . . . . . . . . . . . . 3-2
Table 4-1   Published Errata in the Third Edition  . . . . 4-3
Table 4-2   Stars with Sign Error of the Galactic 
		Latitued in the Published Catalogue  . . . 4-4
Table 5-1   Sample Listing . . . . . . . . . . . . . . . . 5-1

*****************************************************************
*								*
*	Section 1 - Introduction				*
*								*
*****************************************************************

In recent years there has been a trend away from publishing
catalogues in book form to preparing catalogues by computer
and distributing them on magnetic tape, with appearance in
book form as a secondary occurrence.  This memo is the result
of the development of the documentation for the machine-
readable version of the catalogue and includes the basic 
information given the origional preface of the published
catalogue.  This memo should be distributed along with any 
copy of the machine-readable version of the catalogue.

*****************************************************************
*								*
*	Section 2 - Tape Contents				*
*								*
*****************************************************************

A byte-by-byte description of the contents of the catalogue
is given in Table 2-1.  The information in the "Description"
column is derived mainly from the published version of the 
catalogue whenever possible.  The "Suggested Format" column
is for FORTRAN-formatted reads.

**************** Table 2-1  Tape Contents ***********************

Byte	Description					Format

1-4	Yale Bright Star (BS)				I4
	   (= Harvard Revised (HR) Number)

5-7	Flamsteed Number				I3

8-14	Name						7A1
	   (Greek letters coded: alpha = 0l . .
	   omega = 24)

15	Sign of Bonner Durchmusterung (BD)		A1

16-22	DM Number					I7

23-28	Henry Draper (HD) Number			I6

29-33	Boss General Catalog (GC) Number		I5

34-37	Trig. Parallax Catalogue Number			I4
	   (when followed by decimal - 1963
	   Supplement)

38-43	Radial Velocity Catalogue Number		I6

44	Double Star Catalogue				A1
	   b - implies Aitken's Catalogue of
		 Double Stars
	   R - implies Rossiter's Catalogue of 
		 Southern Double Stars
	Other catalogues or lists unnumbered,
	are represented be letters:
	   I - Innes
	   F - Finsen
	   K - Kuiper
	   B - van Biesbroeck or van den Bos

45-49	Catalogue Number				I5

50-51	Blank or letters indicating componets		2A1
	   of multiple-star system.

52-59	Variable Star Catalogue				8A1
	   (1958 or 1961 Supplement, suspected
	   but unconfirmed variables are 
	   represented by "VAR?"left justified)

60-65	***** Right Ascension (epoch 1900.0) *****

60-61	Hours						I2

62-63	Minutes						I2

64-65	Seconds						I2

66	Sign of Ten-Year change in Right Ascension	A1

67-69	Ten-Year change in Right Ascension		I3
	   (unit = seconds)

70-74	***** Declination (epoch 1900.0) *****

70	Sign						A1

71-72	Degrees						I2

73-74	Minutes						I2

75-79	***** Galactic Longitude *****

75-77	Degrees						I3

78-79	Minutes						I2

80-84	***** Galactic Latitued *****

80	Sign						A1

81-82	Degrees						I2

83-84	Minutes						I2

85-88	BS-HR Number					I4

89-94	***** Right Ascension (epoch 2000.0) *****

89-90	Hours						I2

91-92	Minutes						I2

93-94	Seconds						I2

95-99	***** Change in Right Ascension *****
	****** (epoch 2000.0 - 1900.0) ******

95	Sign						A1

96-97	Minutes						I2

98-99	Seconds						I2

100-104	***** Declination (epoch 2000.0) *****

100	Sign						A1

101-102	Degrees						I2

103-104 Minutes						I2

105-107	***** Change in Declination *****
	**** (epoch 2000.0 - 1900.0) ****

105	Sign						A1

106-107	Minutes						I2

108-111	***** Visual Magnitude *****

108	Sign						A1
	   (if minus (-) magnitude)

109-111	Visual Magnitude				I3
	   (unit = 0.01 magnitude)

112-113	Source:						2A1
	   b - Indicates photoelectric determination
		  by UBV System
	   R - Indicates HR magnitudes reduced by
		  Rybka to V system
	   H - Indicates original HR magnitude was
		  was retained
	   B - Indicates blended images

	***** Color *****

114	Sign						A1

115-117	B-V in UBV System				I3
	   (unit = 0.01 magnitude)

118-139 Spectral Class					22A1
	   (if composit spectral class,
	   plus (+) in byte 139)

140	Sign						A1

141-144	value						I4
	   (unit = 10^-3 arcsec)

145-149	***** Annual Proper Motion in Declination *****

145	Sign						A1

146-149	Value						I4
	   (unit = 10^-3 arcsec)

150-154	***** Parallax *****

150	Sign						A1

151-153	Trigonometric Parallax				I3
	   (unit = 10^-3 arcsec)

154	D indicates Dynamical Parallax, which is	A1
	given only when Trigonometric Parallax
	is not available

155-160	***** Radial Velocity *****

155	Sign						A1

156-160	Velocity (km/sec)				5A1
	   ("V?" appears not right justified)

	***** Double Star Data *****

161-163	Magnitude difference between two componets	I3
	of a visual binary, or between two brightest
	componets of a multiple system from the
	double star catalog, which may be inconsistent
	with the values given in bytes 107-110.
	   (unit = 0.01 magnitude)

164-167	Maxium observed separation of the same two	I4
	componets acording to the paticular catalog
	cited.
	   (unit = 0.1 arcsec)

168	Number of componets having lettered 		I1
	designations in the catalog of double stars.

169-170	Remarks:
	1 - The companion is optical.
	2 - Visual binary.
	3 - Common proper motion componets.
	4 - Fixed-seperation companion.
	5 - Two spectra are indicated on the
	       radial velocity plates.
	6 - The star is a spectroscopic binary.
	7 - Magnitude and color given refer to 
	       the combined light of two or 
	       more stars.

	The following letters refer to types of
	remarks that appear in the book form of
	the catalogue:

	D - Double star data.
	G - Cluster, group, aggregate, or 
	       association membership.
	M - Comments on magnitude or color, except
	       data on known variable stars.
	N - The name of a bright star.
	R - Radial velocity comments, including
	       data on spectroscopic binaries.
	S - Comments on Spectra.
	V - Remarks on variable stars other than
	       the data from General Catalogue of
	       Variable Stars and its Supplement,
	       which are abstracted in the Remarks
	       for all stars with named variable
	       star designations.
	* - Any combination of the above categories 
	       and other comments not falling under
	       any of those categories.

171-178	Right ascension (1900) in radians		F8.4

179-186	Declination (1900) in radians			F8.4

187-194	Right ascension (2000) in radians		F8.4

194-202	Declination (2000) in radians			F8.4

*****************************************************************
*								*
*	Section 3 - Tape Characteristics			*
*								*
*****************************************************************

***** The Star Catalogue is normally supplied on IBM compatible
***** 9 track computer tape (eg. EBCDIC characters).  It is also
***** available on special request on DEC compatible 9 track
***** computer tape (eg. ASC-II characters).  The data on the 
***** floppy disks are in ASCII.

The information contained in this section is sufficient for
the user to read the machine-readable version of the catalogue.
The statistics of the contents of the entire tape are given in
Table 3-1, if more than one number is given for any entry this
refers to a data set with more than one file.  The multiple 
numbers then refer to the first, second, third, etc. files of
the tape.

*********** Table 3-l  IBM/EBDIC Tape Characteristics ***********

Catalogue				YBS
Number of Tracks			9
Density (BPI)				1600
Number of files				1
Logical Record Length (bytes)		202
Blocksize (bytes)			20200
Blocking Factor				100
Record Format (IBM OS/JCL)		FB
Total number of logical Records		9110
Total number of blocks			92

********** Table 3-1  DEC/ASCII Tape Characteristics ************

Catalogue				YBS
Number of Tracks			9
Density (BPI)				800
Number of files				1
Logical Record Length (bytes)		202
Normal Blocksize (bytes)		15150
Last Block Blocksize (bytes)		7070
Blocking Factor				75
Record Format (IBM OS/JCL)		FB
Total Number of logical Records		9110
Total Number of Blocks			122

*****************************************************************
*								*
*	Section 4 - Remarks and Modifications			*
*								*
*****************************************************************

The magnetic tape version of the Third Revised Edition 
of the Catalogue of Bright Stars (1964, Yale University 
Observatory) was received in 1972 from the U. S. Naval
Observatory.  This version of the catalogue had seperate
data files for the left-hand and the right-hand pages of
the catalogue.  Listed below are the modifications to 
that version.

1.	Overpunches existed in several fields.  These
	fields were decoded and all amperstands were
	converted to plus (+) signs.

2.	Right-hand and left-hand page dara were merged
	into one data file.

3.	The tape was converted from a 7-track to a
	9-track tape.

4.	The record size was expanded from 84 bytes
	(each page with overpunches included) to
	202 bytes.

5.	All published errata (cf. table 4-1) have been
	incorporated in the magnetic tape version.

6.	One star (BS 1612) was found to have a blank
	magnitude field which when read with a FORTRAN
	F format yielded a zero value.  This field was
	corrected to 3.8 as per the published catalogue.

7.	The double star number or leter was not right
	or left justified.  The bytes containing this 
	information were modified so that only the 
	number appears in bytes 45-49 and the letter 
	portion of the identification appears only in
	bytes 50-5l.

8.	The equatorial coordinates at both epochs 1900
	and 2000 were computed in radians and added to
	each record.

In addition to the published errata other identification
errors have been noted over the past years.  These possible
errors are listed below for reference but the corrections
have not been made to the machine-readable version (except
for star BS 1101) of the catalogue since they do not 
constitute a published set of errata.

BS #	Published Value			Correction

67	DM +1 degree 28			DM +0 degree 28
1101	DM -1 degree 572		DM -0 degree 572
6165	B-V +0(m/.)26			B-V -(m/.)26
7705	HD 191570			HD 191571
8417	HD 209790			HD 209791
8841	HD 219449			HD 219430

*****   (m/.) was printed as a "." with a "m" directly above 
*****   the "."

The second edition of the Yale Bright Star Catalogue
(1940) included all except 19 of the 9110 stars first
listed in the Harvard Annals (Volume 50, 1908), the "HR"
catalogue whose numbering was exactly taken over in the 
Yale Bright Star Catalogue (YBS).  There are 19 blank 
records in both the published version of the catalogue
as well as the machine-readable version of the YBS.
There are 9091 records with information, and 19 
records with just the HR number (the remainder of the 
record is blank).  The HR stars which are blank are
given below.

	92	95	182	663	1057
	1630	1841	2472	2496	3515
	3671	6309	6437	6515	7138
	7189	7539	8296	8945

In addition to the information given in the Catalogue
of Bright Stars - Third Revised Edition, the value of
the 10-year change in the right ascension (bytes 66-69)
is given plus the equatorial coordinates at both epochs
(1900 and 2000) in radians (bytes 171-202).

The published version of the catalogue had sign errors
for the stars listed in Table 4.2.  For all of the stars
listed a minus sign should appear for the sign of the
galactic latitude in the hard copy, the magnetic tape 
version is correct.

It should be noted that more stars have colors on the
machine-readable version of this catalogue than given
in the published version of the catalogue.  Also, 
sometimes the spectral type differs from that as listed
in the Third Revised Edition (e.g. HR 72 is given as 
a G0 star in the published catalogue but as a G5 IV-V
star on the tape).  It is unclear what or who is the
source of these updates.

******** Table 4-1 Published errata in the Third Edition ********

BS #	Column			For		Read

472	R			blank		3
967	Radial Velocity		-65		-6
969	Radial Velocity		+22		+2
1210	Double Srars:
	  delta m		blank		4.2
	  Sep			blank		75.3
	  No			blank		3
1966	RA (2000)		2x		27
2063	DM			11711		1171a
2402	DM			136		1136
2564	Dec (1900)		1'		18'
3366	HD			72622		72292
3445	B-V			-0.71		+0.71
3759	Radial Velocity		+98		+10
3962	HD			87330		87318
4101	R			blank		1
4450	delta alpha		5v		55
5422	R			2		1
5703	Dec (1900)		+		-
	Galactic Long		20 deg 59'	347 deg 43'
	Galactic Lat		+53 deg 21'	+34 deg 3'
	Dec (2000)		+14 deg 49'	-15 deg 33'
5839	Radial Velocity		+8		+4
6206	Double Stars: Sep	957.		95.7
6616	B-V			+1.16		+0.70
6622	Spectral Class		B35		B3V
6984	RA (1900)		27s		37s
	Galactic Long		l'		2'
	Galactic Lat		5'		3'
	RA (2000)		4s		14s
7257	Radial velocity		+16		+13
7517	HD			186648		186675
7543	R			blank		1
7567	Variable Star Cat	V   Cyg		V280 yg
7645	R			blank		1
8225	R			blank		1
8570	HD			213306		213296
8571	HD			213307		213306
8833	R			blank		1

********** Table 4-2  Stars with sign error of the **************
********** galactic latitude in the published catalogue. ********

93	488	561	839	964	1046	1073	1324
1330	1550	1612	1615	1689	1779	1795	1805
1843	1850	1914	1945	2074	2116	2135	2184
2223	2250	2253	2269	2287	2342	2362	2385
2404	2422	2432	2441	2474	2479	2517	2530
2582	2622	2639	2694	2723	2796	2825	2853
2923	2992	3004	3034	3099	3113	3160	3170
3177	3237	3237	3242	3253	3267	3270	3296
3327	3328	3520	3588	3614	3784	3837	3875
3920	4091	4095	4114	4144	4147	4169	4177
4179	4188	4198	4210	4228	4239	4271	4487
4499	4511	4541	4573	4599	4603	4644	4729
4730	4730	4781	4771	4830	4972	5171	5349
5459	5460	5546	5873	5937	6197	6381	6392
6398	6450	6456	6522	6700	6716	6724	6727
6762	6798	6825	6838	6858	6946	6973	7158
7315	7331	7332	7357	7437	7458	7472	7490
7540	7670	7743	7770	7826	7911	7926	7984
8023	8035	8053	8064	8107	8136	8161	8185
8206	8259	8677	8745	8797	8803	8894	8990
9100

*****************************************************************
*								*
*	Section 5 - Sample Output Listing			*
*								*
*****************************************************************

The following is a listing of the EBCDIC (ASCII) characters
on the machine readable version of this catalogue.  If this
document represents a binary tape, this listing is a formatted
listing for convience.  The sample listing represents the
contents of the first phusical block on the tape.  The header
numbers (first three lines) when read vertically refer to the 
byte which then agrees with the information in table 2-1.

********* Table 5-1  Sample Output Listing **********************

***** note: due to lazyness and your probable lack of a 132 
***** column line printer, I have reformatted the sample listing
***** and only included a few stars vs the 100 stars in the
***** documentations sample listing.  You should be able to 
***** get the general idea tho.

Bytes		 1	   2	     3	       4	 5
	123456789 123456789 123456789 123456789 123456789

000-050 0001          +4404550     3   54        35    46
051-100           0 0 2+ 31+444011426-16530001 0 511+ 5 9+
101-150 4513+33 646 R         A0               -0016-0017
151-200     - 18   29 2153    0.0001  0.7796  0.0226  0.78
201-202 92

000-050 0002          - 104525     6   51        32      
051-100          235956+ 31- 1 3 9819-61 80002 0 5 4+ 5 8-
101-150  030+33 628  +110G    G9               +0039-0055
151-200     + 14              6.2829 -0.0183  0.0221 -0.00
201-202  87


***** note: due to the poor quality of the photoreduced
***** printout, 5s, 6s, 8s, & 9s may have been mistaken 
***** each other.

IMSAI made two keyboards that had an 8035 microprocessor in the 
keyboard.

The first was known as an IKB-1, and it had it's 
program in a 2716 EPROM.  The code for this EPROM is in file
IKB-1.ROM.  Onlythe first half half of this rom is used, and the
second half is filled with FF's.

The second was known as an IKB-2, and it had it's
program in a 2708 EPROM.  The code for this EPROM is in file
IKB-2.ROM.

