g Sextantis


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


catalogues and names g Sex, 8 Sex, HR 3909, HD 85558, SAO 137199, WDS 09525-0806A
constellation Sextans

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


position, motion, parallax:

position (J2000) RA: 9h 52min 30,4sec DEC: -8 6' 18''
position (J1900) RA: 9h 47min 33,4sec DEC: -7 38' 3''
proper motion (J2000) RA: -0,055 arcsec/a DEC: -0,04 arcsec/a
radial velocity 12 km/s
note: variable radial velocity
rotational velocity 114 km/s (uncertain) (variable)
trigonometric parallax 0,013 arcsec
note (category: dynamical parallaxes): 0.012".

magnitude

visual magnitude 5,05
(V on UBV Johnson system)

spectral / color information

spectral class A1V
B-V-magnitude 0,04
U-B-magnitude 0,06

double/multiple star system information

number of components of multiple star system 3
separation 0,4 arcsec
mag difference (of double or brightest multiple) 0,5
component ID AB
note (category: double and multiple data): AB 5.58 A1V, 6.07 A4V, 77.55y, a = 0.383". Combined mag., colors. C, 12.28V at 36" optical.

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

position, motion, parallax:

position (J2000) RA: 9h 52min 30,438sec DEC: -8 6' 17,95'' 0,19 arcsec source: 16
proper motion (J2000) RA: -0,0038 arcsec/a DEC: -0,041 arcsec/a source: 25
radial velocity 12 km/s source: 25
trigonometric parallax 0,013 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 245,58 latitude: 34,17
GCI unit vector (J2000) X: -0,840737 Y: 0,522766 Z: -0,140987

magnitude:

visual 5,05 (observed) source: 25
photovisual 4,8 source: 16
photographic 5,2 source: 2

spectral information:

spectral class A2 source: 96
Morgan-Keenan A1V source: 25
B-magnitude 5,09 0,05 B-V-magnitude 0,04
U-magnitude 5,15 0,05 U-B-magnitude 0,06

double/multiple star system information:

source of data: 19
magnitude difference between brightest and second brightest component 0,3

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
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
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: 9h 50min 1,878sec DEC: -7 52' 7,35'' 0,027 arcsec
position (J2000) RA: 9h 52min 30,449sec DEC: -8 6' 17,6''
proper motion J1950 (FK4) RA: -0,004 arcsec/a DEC: -0,045 arcsec/a 0,004 arcsec/a in RA
0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0037 arcsec/a DEC: -0,04 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,2 (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.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 13593
Durchmusterung BD-07 2909
Boss General Catalogue 13593
Henry Draper Catalogue 85558

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

position and proper motion:

position (J2000) RA: 9h 52,5min DEC: -8 6'
proper motion (J2000) RA: -0,057 arcsec/a DEC: -0,042 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
AB 1854 often '' 5,7 6 A1V AC 5
AB-C 1880 8 325 35,8'' 5,05 12,28 A2 HJ 4256
1963 330 37,2''

discoverer information:

discoverer code discoverer reference
AC 5 - -
HJ 4256 Herschel, J. -

notes:

note Gamma Sex. P = 77.6yr., a = 0.38", motion retrograde.