g1Volantis


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 g1Vol, HR 2735, HD 55864, SAO 256373, WDS 07087-7030B
constellation Volans

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


position, motion, parallax:

position (J2000) RA: 7h 8min 42,2sec DEC: -70° 29' 50''
position (J1900) RA: 7h 9min 33,4sec DEC: -70° 20' 4''
proper motion (J2000) RA: 0,007 arcsec/a DEC: 0,101 arcsec/a
radial velocity -3 km/s
note: spectroscopic binaries
trigonometric parallax 0,016 arcsec
note (category: dynamical parallaxes): 0.018".

magnitude

visual magnitude 5,69
(V on UBV Johnson system)

spectral / color information

spectral class F2V
B-V-magnitude 0,4
U-B-magnitude 0,04

variability information

note (category: variability): Combined light with HR 2736 varies, but 2736 is probably the variable.

double/multiple star system information

separation 13,6 arcsec
mag difference (of double or brightest multiple) 1,9
note Worley (1978) update of the IDS
note (category: double and multiple data): Binary with HR 2736.

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

position, motion, parallax:

position (J2000) RA: 7h 8min 42,459sec DEC: -70° 29' 50,52'' ±0,19 arcsec source: 16
proper motion (J2000) RA: 0,0055 arcsec/a DEC: 0,096 arcsec/a source: 25
radial velocity -3 km/s source: 25
trigonometric parallax 0,016 ±0,002 arcsec source: 25
galactic coord. (B1950) longitude: 281,56° latitude: -24,05°
GCI unit vector (J2000) X: -0,098594 Y: 0,31896 Z: -0,942626

magnitude:

visual 5,69 (observed) source: 25
photovisual 5,8 source: 2
photographic 6,4 source: 2

spectral information:

spectral class G0 source: 96
Morgan-Keenan F2V source: 25
B-magnitude 6,09 ±0,05 B-V-magnitude 0,4
U-magnitude 6,13 ±0,05 U-B-magnitude 0,04

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 13,6 arcsec
magnitude difference between brightest and second brightest component 1,89
position angle 297 °

component magnitude spectral class catalogue(s)/name(s)
A 3,78 K0 g2Volantis, HR 2736, HD 55865, SAO 256374
B 5,69 G0 g1Volantis, HR 2735, HD 55864, SAO 256373

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: 7h 9min 8,228sec DEC: -70° 24' 57,88'' ±0,04 arcsec
position (J2000) RA: 7h 8min 42,154sec DEC: -70° 29' 49,65''
proper motion J1950 (FK4) RA: 0,0017 arcsec/a DEC: 0,097 arcsec/a ±0,009 arcsec/a in RA
±0,007 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0013 arcsec/a DEC: 0,1 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class G0
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: 9513
Durchmusterung CP-70 600B
Boss General Catalogue 9513
Henry Draper Catalogue 55864

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

position and proper motion:

position (J2000) RA: 7h 8,7min DEC: -70° 30'
proper motion (J2000) RA: 0,023 arcsec/a DEC: 0,106 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
- 1826 20 303° 13,6'' 3,78 5,67 K0III F2V DUN 42
1977 297° -

discoverer information:

discoverer code discoverer reference
DUN 42 Dunlop, J. -

notes:

note Gamma (2) and Gamma (1) Vol. B is a spectroscopic binary and is variable. Proper motion of B +028 +096.