V/95 SKY2000 - Master Star Catalog (Myers+ 1997)

SKY2000 - Master Star Catalog - Star Catalog Database

STAR CATALOG DATABASE

SKY2000 MASTER CATALOG SKYMAP SOFTWARE CAPABILITIES

Myers J.R., Sande C.B., Miller A.C., Warren Jr. W.H., Tracewell D.A.

<Goddard Space Flight Center, Flight Dynamics Division (1997)>

Warren Jr. W.H., Sande C.B., Millar A.C. Myers J.R., Home A.T., Tracewell D.A.

<Bull. American Astron. Soc., 191, #128.12 (1997)>

Description:

The SKYMAP Star Catalog System consists of a Master Catalog stellar database and a collection of utility software designed to create and maintain the database and to generate derivative mission star catalogs (run catalogs). It contains an extensive compilation of information on almost 300000 stars brighter than 8.0 mag.

 

Introduction:

The original SKYMAP Master Catalog was generated in the early 1970's. Incremental updates and corrections were made over the following years but the first complete revision of the source data occurred with Version 4.0. This revision also produced a unique, consolidated source of astrometric information which can be used by the astronomical community. The derived quantities were removed and wideband and photometric data in the R (red) and I (infrared) systems were added. This version, the most recent, is discussed in detail in sky.txt.

Confer.txt describes these upgrades in detail. There are some deficiencies that exist in the SKY2000 Master Catalog that we are aware of. These items will be researched and corrected in future SKY2000 Master Catalog releases. (See deficient.txt).

File Summary:

FileName Lrecl Size Records Explanations
ReadMe 80 15KB   This file
sky0.dat 463 774KB 10236 Data for stars in RA < 1 hour
sky1.dat 463 780KB 10233 Data for stars in 1 h <= RA < 2 h
sky2.dat 463 770KB 10084 Data for stars in 2 h <= RA < 3 h
sky3.dat 463 759KB 9829 Data for stars in 3 h <= RA < 4 h
sky4.dat 463 801KB 10423 Data for stars in 4 h <= RA < 5 h
sky5.dat 463 1039KB 13702 Data for stars in 5 h <= RA < 6 h
sky6.dat 463 1258KB 16944 Data for stars in 6 h <= RA < 7 h
sky7.dat 463 1269KB 16880 Data for stars in 7 h <= RA < 8 h
sky8.dat 463 1137KB 15002 Data for stars in 8 h <= RA < 9 h
sky9.dat 463 951KB 12544 Data for stars in 9 h <= RA < 10 h
sky10.dat 463 876KB 11487 Data for stars in 10 h <= RA < 11 h
sky11.dat 463 816KB 10611 Data for stars in 11 h <= RA < 12 h
sky12.dat 463 797KB 10154 Data for stars in 12 h <= RA < 13 h
sky13.dat 463 809KB 10370 Data for stars in 13 h <= RA < 14 h
sky14.dat 463 825KB 10685 Data for stars in 14 h <= RA < 15 h
sky15.dat 463 871KB 11334 Data for stars in 15 h <= RA < 16 h
sky16.dat 463 917KB 11934 Data for stars in 16 h <= RA < 17 h
sky17.dat 463 991KB 13046 Data for stars in 17 h <= RA < 18 h
sky18.dat 463 1168KB 15477 Data for stars in 18 h <= RA < 19 h
sky19.dat 463 1248KB 16492 Data for stars in 19 h <= RA < 20 h
sky20.dat 463 1216KB 16064 Data for stars in 20 h <= RA < 21 h
sky21.dat 463 1007KB 13324 Data for stars in 21 h <= RA < 22 h
sky22.dat 463 898KB 11789 Data for stars in 22 h <= RA < 23 h
sky23.dat 463 824KB 10841 Data for stars with RA >= 23 h
sky.txt 80 30KB 713 Detailed discussion
confer.txt 80 9KB 418 Paper prepared for AIAA meeting
deficent.txt 80 1KB 38 Known deficiencies
ref.dat 75 4KB 186 *Reference table

Note on ref.dat:

Although a format table is provided for this file, it should be noted that the complete reference usually occupies several lines. Moreover, the secondary reference is in the same bytes as the prime reference. Finally, in order to indicate the source of the reference, symbols are used in addition to the reference number itself.

See also: Flight Dynamics' Star Catalog Database http://fdd.gsfc.nasa.gov/attitude/skymap.html

Byte-by-byte Description of file: sky*.dat

Bytes Format Units Label Explanations
1-8 I8   ID Skymap number
9-14 I6   HD ?Henry Draper number
15 I1   HD_dup *? HD duplicity indication
16 A1   u_HD HD identification uncertain
17-22 I6   SAO ?Smithsonian Astrophy. Obs. cat. number
23 A1   SAO_comp SAO component
24-25 A2   DM_cat Durchmusterung catalog
26-28 I3 deg DM_zone ?Durchmusterung zone
29-33 I5   DM_num ?Durchmusterung number
34 A1   DM_comp Durchmusterung component
35 A1   DM_supp Durchmusterung supplement letter
36 A1   u_DM_num [: ] DM identification uncertain
37-40 I4   HR ?Harvard Revised Photometry num. (=BS)
41-50 A10   WDS Washington Catalog of Double Stars num.
51-55 A5   WDC_comp WDS components
56 A1   u_WDS [: ] WDS identification uncertain
57-62 I6   PPM ?Position and Proper Motion number
63 A1   u_PPM [: ] PPM identification uncertain
64-71 I8   ID_merg ?Skymap num. of last skymap entry merged with this star
72-81 A10   name Star name (or AGK3 number)
82-91 A10   var Variable star name (or doubtful variability)
92-93 I2 h RAh Right ascension (J2000) hours
94-95 I2 min RAm Right ascension (J2000) minutes
96-101 F6.3 s RAs Right ascension (J2000) seconds
102 A1   DE- Declination sign
103-104 I2 deg DEd Declination degrees (J2000)
105-106 I2 arcmin DEm Declination minutes (J2000)
107-111 F5.2 arcsec DEs ?Declination seconds (J2000)
112-117 F6.2 arcsec u_pos ?Position uncertainty
118 A1   n_pos Blended position flag
119-120 I2   r_pos Source of position
121-127 F7.4 arcsec/a pmRA ?Proper motion in RA (J2000)/cos(Dec)
128-134 F7.3 arcsec/a pmDE ?Proper motion in Dec (J2000)
135-136 I2   r_pm ?Source of proper motion data
137-142 F6.1 km/s RV ?Radial velocity
143-144 I2   r_RV ?Source of radial velocity data
145-150 F6.3 arcsec Plx ?Trigonometric parallax
151-156 F6.4 arcsec u_Plx ?Trigonometric parallax uncertainty
157-158 I2   r_Plx ?Source of trigonometric parallax data
159-167 F9.6   GCI_X *GCI unit vector in X (J2000)
168-176 F9.6   GCI_Y *GCI unit vector in Y (J2000)
177-185 F9.6   GCI_Z *GCI unit vector in Z (J2000)
186-191 F6.2 deg GLON Galactic longitude (B1950)
192-197 F6.2 deg GLAT Galactic latitude (B1950)
198-203 F6.3 mag V ?Observed visual magnitude (V or v)
204-208 F5.2 mag V_der ?Derived visual magnitude
209-213 F5.3 mag u_V ?Derived v or observed visual magnitude uncertainty
214 A1   n_V [b]Blended visual magnitude flag
215-216 I2   r_V ?Source of visual magnitude
217 I1   d_V ?V magnitude derivation flag
218-223 F6.3 mag B ?B-magnitude (observed)
224-229 F6.3 mag B-V ?B-V color (observed)
230-234 F5.3 mag u_B ?B or (B-V) magnitude uncertainty
235 A1   n_B [b]Blended b-magnitude flag
236-237 I2   r_B ?Source of b-magnitude
238-243 F6.3 mag U ?U-magnitude (observed)
244-249 F6.3 mag U-B ?U-B color (observed)
250-254 F5.3 mag u_U ?U or (U-B) magnitude uncertainty
255 A1   n_U Blended u-magnitude flag
256-257 I2   r_U ?Source of u-magnitude
258-261 F4.1 mag mag_ptv ?Photovisual magnitude (observed)
262-263 I2   r_mag_ptv ?Source of ptv magnitudes
264-267 F4.1 mag mag_ptg ?Photographic magnitude (observed)
268-269 I2   r_mag_ptg ?Source of ptg magnitudes
270-299 A30   Sp_MK Morgan-Keenan (MK) spectral type
300-301 I2   r_Sp_MK ?Source of MK spectral type data
302-304 A3   Sp *One-dimensional spectral class
305-306 I2   r_Sp ?Source of one-dimen. spectral class
307-313 F7.3 arcsec sep ?Separation of brightest and second brightest components
314-318 F5.2 mag del_mag ?Magnitude difference of the brightest and second brightest components
319-325 F7.2 yr per_orb ?Orbital period
326-328 I3 deg PA ?Position angle
329-335 F7.2 yr date ?Year of observation (AD)
336-337 I2   r_dup ?Source of multiplicity data
338 A1   b_del_mag Passband of multiple star mag. dif.
339-345 F7.4 deg dis_near ?Distance to nearest neighboring star in the master catalog
346-352 F7.4 deg dis_2 ?Dist. to nearest neighboring master cat. star no more than 2 mag. fainter
353-360 I8   ID_A ?Skymap number of primary component
361-368 I8   ID_B ?Skymap number of second component
369-376 I8   ID_C ?Skymap number of third component
377-381 F5.2 mag mag_max ?Maximum variable magnitude
382-386 F5.2 mag mag_min ?Minimum variable magnitude
387-391 F5.2 mag var_amp ?Variability amplitude
392 A1   n_var_amp Passband of variability amplitude
393-400 F8.2 d var_per ?Period of variability
401-408 F8.2 d var_Epoch ?Epoch of var. in JD - 2400000
409-411 I3   var_typ ?Type of variable star
412-413 I2   r_var ?Source of variability data
414-419 F6.3 mag mag_1 ?Passband #1-magnitude (observed)
420-425 F6.3 mag v-mag_1 ?v - passband #1 color
426-430 F5.3 mag u_mag_1 ?Passband #1 uncertainty in mag. or col.
431 A1   mag_1_sy *Passband #1 photometric system
432 A1   p_mag_1 *Passband #1
433-434 I2   r_mag_1 ?Source of passband #1: mag. or color
435-440 F6.3 mag mag_2 ?Passband #2-magnitude (observed)
441-446 F6.3 mag v-mag_2 ?v - passband #2 color
447-451 F5.3 mag u_mag_2 ?Passband #2 uncertainty in mag. or col.
452 A1   mag_2_sy *Photometric system passband #2
453 A1   p_mag_2 *Passband #2:
454-455 I2   r_mag_2 ?Source of passband #2: mag. or color
456-461 F6.3 mag mag1-mag2 ?Passband #1 - passband #2 color
462 A1   n_mag_1 [b]Blended passband #1 mag/color flag
463 A1   n_mag_2 [b]Blended passband #2 mag/color flag

Note on HD_dup:

1. indicates this the brighter component of a system with a companion >= 0.3 mag.

2. indicates this is the fainter component of a system with a companion <= 0.3 mag. fainter e

9 indicates that this is a blend of two HD stars. The HD number is the lower of the two.

Note on GCI_X:

cos(Dec)*cos(RA)

Note on GCI_Y:

cos(Dec)*sin(RA)

Note on GCI_Z:

sin(Dec)

Note on Sp:

i.e. HD, AGK3, or SAO

Note on mag_1_sy:

Photometry is on the RI system. This byte indicates whether it is Johnson or Russian)

Note on p_mag_1:

Filter used (currently, only R)

Note on mag_2_sy:

Photometry is on the Johnson, Eggen, or Cousins system. This byte indicates which.

Note on p_mag_2:

Filter used (currently, only I)

Byte-by-byte Description of file: ref.dat

Bytes Format Units Label Explanations
1-6 A6   ID *Reference number
8-27 A20   name Common name of catalog
29-75 A47   ref Complete reference

Note on ID:

* Items referenced in this paper

( ) = via SKYMAP Master Star Catalog, Version 3.7

[ ] = new sources for Version 4.0

< > = new sources for Version 4.0a

All other sources added for Versions 4.1 and 4.2

In addition to the main reference, this column gives a secondary reference for those taken from Skymap 3.7.

Acknowledgement:

The ADC thanks Dr. W.H. Warren Jr. for his help resolving some of the problems and uncertainties we had with the interpretation of the data.

(End) N.G. Roman [ADC/SSDOO] 25-Jul-1997