b Microscopii


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog


catalogues and names b Mic, HR 7979, HD 198529, SAO 212499
constellation Microscopium

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)


position, motion, parallax:

position (J2000) RA: 20h 51min 58,8sec DEC: -33 10' 38''
position (J1900) RA: 20h 45min 46,1sec DEC: -33 33' 7''
proper motion (J2000) RA: 0,015 arcsec/a DEC: 0,014 arcsec/a
radial velocity -12 km/s
note: suspected variable radial velocity

magnitude

visual magnitude 6,04
(V on UBV Johnson system)

spectral / color information

spectral class A2Vn
B-V-magnitude 0,03

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 20h 51min 58,763sec DEC: -33 10' 40,53'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0003 arcsec/a DEC: 0,001 arcsec/a source: 25
radial velocity -12 km/s source: 25
galactic coord. (B1950) longitude: 10,74 latitude: -38,57
GCI unit vector (J2000) X: 0,570761 Y: -0,612176 Z: -0,547241

magnitude:

visual 6,04 (observed) source: 25
photovisual 6,4 source: 16

spectral information:

spectral class A2 source: 96
Morgan-Keenan A2Vn source: 25
B-magnitude 6,07 0,05 B-V-magnitude 0,03

sources:

16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
96 SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 20h 48min 52,686sec DEC: -33 21' 57,72'' 0,046 arcsec
position (J2000) RA: 20h 51min 58,797sec DEC: -33 10' 38,37''
proper motion J1950 (FK4) RA: 0,0012 arcsec/a DEC: 0,017 arcsec/a 0,009 arcsec/a in RA
0,007 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0012 arcsec/a DEC: 0,014 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 6 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 29080
Durchmusterung CD-3315245
Boss General Catalogue 29080
Henry Draper Catalogue 198529