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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 W.H. Jr., Tracewell D.A. <Goddard Space Flight Center, Flight Dynamics Division (1997)>
ADC_Keywords: Positional data ; Proper motions ; Cross identifications; Combined data 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. 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 "Kwon Deficiencies" below) File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file sky00.dat 463 10236 Data for stars in RA < 1 hour (1) sky01.dat 463 10233 Data for stars in 01 h ≤ RA < 02 h (1) sky02.dat 463 10084 Data for stars in 02 h ≤ RA < 03 h (1) sky03.dat 463 9829 Data for stars in 03 h ≤ RA < 04 h (1) sky04.dat 463 10423 Data for stars in 04 h ≤ RA < 05 h (1) sky05.dat 463 13702 Data for stars in 05 h ≤ RA < 06 h (1) sky06.dat 463 16944 Data for stars in 06 h ≤ RA < 07 h (1) sky07.dat 463 16880 Data for stars in 07 h ≤ RA < 08 h (1) sky08.dat 463 15002 Data for stars in 08 h ≤ RA < 09 h (1) sky09.dat 463 12544 Data for stars in 09 h ≤ RA < 10 h (1) sky10.dat 463 11487 Data for stars in 10 h ≤ RA < 11 h (1) sky11.dat 463 10611 Data for stars in 11 h ≤ RA < 12 h (1) sky12.dat 463 10154 Data for stars in 12 h ≤ RA < 13 h (1) sky13.dat 463 10370 Data for stars in 13 h ≤ RA < 14 h (1) sky14.dat 463 10685 Data for stars in 14 h ≤ RA < 15 h (1) sky15.dat 463 11334 Data for stars in 15 h ≤ RA < 16 h (1) sky16.dat 463 11934 Data for stars in 16 h ≤ RA < 17 h (1) sky17.dat 463 13046 Data for stars in 17 h ≤ RA < 18 h (1) sky18.dat 463 15477 Data for stars in 18 h ≤ RA < 19 h (1) sky19.dat 463 16492 Data for stars in 19 h ≤ RA < 20 h (1) sky20.dat 463 16064 Data for stars in 20 h ≤ RA < 21 h (1) sky21.dat 463 13324 Data for stars in 21 h ≤ RA < 22 h (1) sky22.dat 463 11789 Data for stars in 22 h ≤ RA < 23 h (1) sky23.dat 463 10841 Data for stars with RA ≥ 23 h (1) sky.txt 75 713 Detailed discussion confer.txt 82 418 Paper prepared for AIAA meeting refs.dat 80 179 Reference table
Note (1): all these files should be concatenated to give the Full SKY2000 catalog, originally split into 24 files.
See also: Flight Dynamics' Star Catalog Database http://fdd.gsfc.nasa.gov/attitude/skymap.html : Flight Dynamics' Star Catalog Database Byte-by-byte Description of file: sky*.dat
Bytes Format Units Label Explanations
1- 8 I8 --- SkyMap Skymap number 9- 14 I6 --- HD ?Henry Draper III/135 number 15 I1 --- m_HD *? HD duplicity indication 16 A1 --- u_HD HD identification uncertain 17- 22 I6 --- SAO ? SAO I/131 number - 23 A1 --- m_SAO SAO component 24- 35 A12 --- DM Durchmusterung (BD I/122 I/119, CD I/114 or CPD I/108) 36 A1 --- u_DM [: ] DM identification uncertain 37- 40 I4 --- HR ?Harvard Revised V/50 num. (=BS) 41- 50 A10 --- WDS Washington Double Stars I/237 number 51- 55 A5 --- m_WDS WDS components 56 A1 --- u_WDS [: ] WDS identification uncertain 57- 62 I6 --- PPM ?Position and Proper Motion number (I/146, I/193, I/208) 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 e_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 e_Plx ?Trigonometric parallax uncertainty 157-158 I2 --- r_Plx ?Source of trigonometric parallax data 159-167 F9.6 --- GCI_X *[-1,1] GCI unit vector in X (J2000) 168-176 F9.6 --- GCI_Y *[-1,1] GCI unit vector in Y (J2000) 177-185 F9.6 --- GCI_Z *[-1,1] 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 Vmag ?Observed visual magnitude (V or v) 204-208 F5.2 mag Vder ?Derived visual magnitude 209-213 F5.3 mag e_Vmag ?Derived v or observed visual magnitude uncertainty 214 A1 --- n_Vmag [b]Blended visual magnitude flag 215-216 I2 --- r_Vmag ?Source of visual magnitude 217 I1 --- d_Vmag ?V magnitude derivation flag 218-223 F6.3 mag Bmag ?B-magnitude (observed) 224-229 F6.3 mag B-V ?B-V color (observed) 230-234 F5.3 mag e_Bmag ?B or (B-V) magnitude uncertainty 235 A1 --- n_Bmag [b]Blended b-magnitude flag 236-237 I2 --- r_Bmag ?Source of b-magnitude 238-243 F6.3 mag Umag ?U-magnitude (observed) 244-249 F6.3 mag U-B ?U-B color (observed) 250-254 F5.3 mag e_Umag ?U or (U-B) magnitude uncertainty 255 A1 --- n_Umag Blended u-magnitude flag 256-257 I2 --- r_Umag ?Source of u-magnitude 258-261 F4.1 mag Ptv ?Photovisual magnitude (observed) 262-263 I2 --- r_Ptv ?Source of ptv magnitudes 264-267 F4.1 mag Ptg ?Photographic magnitude (observed) 268-269 I2 --- r_Ptg ?Source of ptg magnitudes 270-299 A30 --- Sp_MK Morgan-Keenan (MK) spectral type 300-301 I2 --- rSpMK ?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 --- ndelmag Passband of multiple star mag. dif. 339-345 F7.4 deg DistNear ?Distance to nearest neighbouring star in the master catalog 346-352 F7.4 deg DistNear2 ?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 MagMax ?Maximum variable magnitude 382-386 F5.2 mag MagMin ?Minimum variable magnitude 387-391 F5.2 mag VarAmp ?Variability amplitude 392 A1 --- n_VarAmp Passband of variability amplitude 393-400 F8.2 d VarPer ?Period of variability 401-408 F8.2 d VarEpoch ?Epoch of var. in JD - 2400000 409-411 I3 --- VarType ?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 emag1 ?Passband #1 uncertainty in mag. or col. 431 A1 --- nmag1 *Passband #1 photometric system 432 A1 --- pmag1 *Passband #1 433-434 I2 --- rmag1 ?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 emag2 ?Passband #2 uncertainty in mag. or col. 452 A1 --- nmag2 *Photometric system passband #2 453 A1 --- pmag2 *Passband #2: 454-455 I2 --- rmag2 ?Source of passband #2: mag. or color 456-461 F6.3 mag mag1-mag2 ?Passband #1 - passband #2 color 462 A1 --- fmag1 [b]Blended passband #1 mag/color flag 463 A1 --- fmag2 [b]Blended passband #2 mag/color flag
Note on m_HD: 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 nmag1: Photometry is on the RI system. This byte indicates whether it is Johnson or Russian) Note on pmag1: Filter used (currently, only R) Note on nmag2: Photometry is on the Johnson, Eggen, or Cousins system. This byte indicates which. Note on pmag2: Filter used (currently, only I)
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
2- 3 I2 --- RefNo [1/99]+= Reference number 4- 7 A4 --- n_RefNo *Note on the addition of the reference 8- 80 A73 --- Text *Text of reference
Note on n_RefNo: (98) = via SKYMAP Master Star Catalog, Version 3.7 (Cat. V/77) .0 = new sources for Version 4.0 .0a = new sources for Version 4.0a All other sources added for Versions 4.1 and 4.2 Note on Text: The first line contains generally the title, followed by an asterisk (*) when item referenced in the paper, and the number(s) assigned to the catalog in the CDS / ADC Archives within < > The following lines provide the full reference.
Known Deficiencies in SKY2000 Master Catalog: 1. Possible incompleteness of HD, PPM and WDS identifiers. 2. Some composite spectrum stars (stars having 2 consecutive HD numbers) are listed with separate entries instead of a single entry with the lower HD number and a 9 code after it. 3. The position uncertainties are presently based on mean epochs of the source catalogs propagated to the year 2000. The actual uncertainties will be individually computed and put into a future version. 4. The sources for MK spectral types are not complete and often refer back to a previous version of the Master Catalog. Improved data may exist for MK spectral types with source 98. 5. Photoelectric data from sources 25 and 26 have assigned errors that are not appropriate. Assigned errors from all other sources except source 20 may not be appropriate. Magnitudes and colors in in the photoelectric data fields taken from sources 94 and 95 may not be photoelectric. 6. Orbital information for physical binary systems has not been incorporated into the catalog yet. 7. Double star components are not always correctly assigned and/or are missing. 8. Photovisual (ptv) and photographic (ptg) magnitudes are incomplete. Approximately 4% of entries do not have either a ptv or a ptg. 9. Maximum and minimum magnitudes for variable stars have not been incorporated into the catalog. 10. Possible duplicates for DM supplemental stars (stars with 'a' or 'b' appended to the DM identifier). 11. Some HD numbers have 1's or 2's appended that may not be consistent with other component identifiers. 12. Incomplete data in the variable star designations. 13. V magnitude data from sources 24 and 28 may not be correct (approximately 0.01% of Master Catalog entries). 14. Colors computed from magnitudes originating from different sources may be inconsistent. 15. Some proper motion sources are not consistent with the position sources. 16. The precision of some magnitude data is not consistent with the accuracy (zeroes are appended). 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
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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