catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names

catalogues and names	NSV 10690, 107 Her, HR 6877, HD 168914, SAO 85957, BD +28 2981
constellation	Hercules

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

position, motion, parallax:

position (J2000)	RA: 18h 21min 1sec	DEC: +28° 52' 12''
position (B1900)	RA: 18h 17min 6.9sec	DEC: +28° 49' 20''
proper motion (J2000)	RA: 0.005 arcsec/a	DEC: 0.05 arcsec/a
radial velocity	-30 km/s note: spectroscopic binaries
rotational velocity	183 km/s (uncertain) (variable)
trigonometric parallax	0.021 arcsec
galactic coordinates	longitude: 56.4°	latitude: 18.86°

magnitude

visual magnitude

5.12 (V on UBV Johnson system)

spectral / color information

spectral class	A7V
B-V-magnitude	0.2
U-B-magnitude	0.15

variability information

variable star identification

10690

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

position, motion, parallax:

position (J2000)	RA: 18h 21min 1.054sec	DEC: +28° 52' 12.27''	±0.35 arcsec	source: 17
proper motion (J2000)	RA: 0.0008 arcsec/a	DEC: 0.057 arcsec/a		source: 25
radial velocity	-30 km/s			source: 25
trigonometric parallax	0.021 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 56.4°	latitude: 18.86°

magnitude:

visual	5.12 (observed)	source: 25
photovisual	5.1	source: 2
photographic	5.2	source: 16

spectral information:

spectral class	A5		source: 96
Morgan-Keenan	A7V		source: 25
B-magnitude	5.32 ±0.05	B-V-magnitude	0.2
U-magnitude	5.47 ±0.05	U-B-magnitude	0.15

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
17	ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991
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 (B1950)	RA: 18h 19min 3.898sec	DEC: +28° 50' 41.92''	±0.02 arcsec
position (J2000)	RA: 18h 21min 1.024sec	DEC: +28° 52' 11.96''
proper motion B1950 (FK4)	RA: 0.0002 arcsec/a	DEC: 0.05 arcsec/a	±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0004 arcsec/a	DEC: 0.05 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

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

spectral information:

spectral class	A5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 25057
Durchmusterung	BD+28 2981
Boss General Catalogue	25057
Henry Draper Catalogue	168914

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

position:

position (equinox 1950.0)

RA: 18h 19min 3.9sec

DEC: +28° 50' 42''

variability informations:

variability type	-
magnitute at max. brightness	5.12
magnitute at min. brightness
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

A7

references

to a study

290477D (designation: ZI 1383)

miscanellous

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