Al Nair


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

  4. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Al Nair, a Gru, NSV 14040, HR 8425, HD 209952, SAO 230992, FK5: 829, WDS 22082-4658
other names Alnair
constellation Grus

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

note (category: star names): ALNAIR; Al Nair.

position, motion, parallax:

position (J2000) RA: 22h 8min 14sec DEC: -46 57' 40''
position (J1900) RA: 22h 1min 55,9sec DEC: -47 26' 43''
proper motion (J2000) RA: 0,129 arcsec/a DEC: -0,151 arcsec/a
radial velocity 12 km/s
rotational velocity 236 km/s (uncertain) (variable)
trigonometric parallax 0,057 arcsec

magnitude

visual magnitude 1,74
(V on UBV Johnson system)

spectral / color information

spectral class B7IV
B-V-magnitude -0,13
U-B-magnitude -0,47
R-I-magnitude -0,09
note (category: spectra): C1 neutral carbon continuum shows discontinuities in UV. COPERNICUS spectra revealed MgII emission.
note (category: colors): Color excess E(B-V) = -0.02.

variability information

variable star identification 14040

double/multiple star system information

separation 28,4 arcsec
mag difference (of double or brightest multiple) 10,1
note Worley (1978) update of the IDS

miscellaneous information

note (category: group membership): Member of Pleiades group.
note (category: stellar radii or diameters): Diam. = 0.00098 - 0.00102".

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

position, motion, parallax:

position (J2000) RA: 22h 8min 14sec DEC: -46 57' 39,59'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0126 arcsec/a DEC: -0,151 arcsec/a source: 25
radial velocity 12 km/s source: 25
trigonometric parallax 0,057 0,006 arcsec source: 25
galactic coord. (B1950) longitude: 350,01 latitude: -52,47
GCI unit vector (J2000) X: 0,602934 Y: -0,319799 Z: -0,730889

magnitude:

visual 1,74 (observed) source: 25
photovisual 2,2 source: 2
photographic 2 source: 2

spectral information:

spectral class B5 source: 96
Morgan-Keenan B7IV source: 25
B-magnitude 1,61 0,05 B-V-magnitude -0,13
U-magnitude 1,14 0,05 U-B-magnitude -0,47

variability information:

source of data: 28
variability type 9
var. amplitude 0,06

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 28,4 arcsec
magnitude difference between brightest and second brightest component 10,6
position angle 149

sources:

2 HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
15 FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
19 WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
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: 22h 5min 5,486sec DEC: -47 12' 14,54'' 0,01 arcsec
position (J2000) RA: 22h 8min 14,012sec DEC: -46 57' 39,8''
proper motion J1950 (FK4) RA: 0,0128 arcsec/a DEC: -0,149 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0128 arcsec/a DEC: -0,153 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,2 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 829
Durchmusterung CD-4714063
Boss General Catalogue 30942
Henry Draper Catalogue 209952

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 22h 8,2min DEC: -46 58'
proper motion (J2000) RA: 0,129 arcsec/a DEC: -0,151 arcsec/a

double/multiple star system information:

component year number of measures position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) discoverer code
- 1947 1 149 28,4'' 1,74 12,3 B7IV RST5483

discoverer information:

discoverer code discoverer reference
RST5483 Rossiter, R.A. -

notes:

note Not seen by Holden on four nights 1963-1969.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 22h 5min 5,5sec DEC: -47 12' 15''

variability informations:

magnitute at max. brightness 1,7
magnitute at min. brightness 1,76
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B5

references

to a study 572444D (designation: ALPHA GRU)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).