catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names

V0856 Sco, HR 5999, HD 144668, SAO 207367, CD -38 10893, WDS 16086-3906A

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

position, motion, parallax:

position (J2000)	RA: 16h 8min 34.2sec	DEC: -39° 6' 19''
position (2000.74)	RA: 16h 8min 37sec	DEC: -39° 6' 26''
position (B1900)	RA: 16h 1min 52.1sec	DEC: -38° 50' 13''
proper motion (J2000)	RA: -0.019 arcsec/a	DEC: -0.031 arcsec/a
radial velocity	8 km/s note: variable radial velocity
galactic coordinates	longitude: 339.52°	latitude: 9.38°

magnitude

visual magnitude

7.05 (V on UBV Johnson system)

spectral / color information

spectral class	A7IVe
B-V-magnitude	0.36
U-B-magnitude	0.25

variability information

variable star identification

V856 Sco

note (category: variability):

6.97 - 7.71V, about 30d, variability attributed to circumstellar dust. Possibly a binary shell star with mass exchange. Considerable confusion between HR 5999 and 6000 particularly as to which is the variable and which the brighter. Originally announced as HR 6000, V856 Sco is really HR 5999, the southern preceding and fainter component C of the bright double. The error stems from interchanged photometric data in Harvard Annals 45, 197, 1901, all other early visual and photographic estimates indicating that the S. prec. component is the fainter.

double/multiple star system information

number of components of multiple star system	4
separation	44.1 arcsec
mag difference (of double or brightest multiple)	0.4
component ID	AC
note	Worley (1978) update of the IDS

note (category: double and multiple data):

CPM with HR 6000 at 44". CD, 7.1, 11.7v, sep. 1.3".

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

position, motion, parallax:

position (J2000)	RA: 16h 8min 34.299sec	DEC: -39° 6' 18.6''	±0.19 arcsec	source: 16
position (2000.74)	RA: 16h 8min 37sec	DEC: -39° 6' 26''	JD: 2451813.20
proper motion (J2000)	RA: -0.0006 arcsec/a	DEC: -0.029 arcsec/a		source: 25
radial velocity	8 km/s			source: 25
galactic coord. (B1950)	longitude: 339.53°	latitude: 9.38°

magnitude:

visual	6.8 (observed)	source: 30
photovisual	6.4	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	A7IVe		source: 25
B-magnitude	7.41 ±0.05	B-V-magnitude	0.36
U-magnitude	7.66 ±0.05	U-B-magnitude	0.25

variability information:

source of data: 30

variability type	271
var. amplitude	1.2

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	16.2 arcsec
magnitude difference between brightest and second brightest component	6.3
position angle	298 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	6.65	A0	HR 6000, HD 144667, SAO 207368
B	6.8	A0	HR 5999, HD 144668, SAO 207367

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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: 16h 5min 12.782sec	DEC: -38° 58' 22.67''	±0.058 arcsec
position (2000.74)	RA: 16h 8min 37sec	DEC: -39° 6' 25''	JD: 2451813.20
position (J2000)	RA: 16h 8min 34.203sec	DEC: -39° 6' 19.11''
proper motion B1950 (FK4)	RA: -0.0017 arcsec/a	DEC: -0.033 arcsec/a	±0.011 arcsec/a in RA ±0.009 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0017 arcsec/a	DEC: -0.031 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A0
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: 21679
Durchmusterung	CD-3810893
Boss General Catalogue	21679
Henry Draper Catalogue	144668

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

position and proper motion:

position (J2000)	RA: 16h 8.6min	DEC: -39° 6'
proper motion (J2000)	RA: -0.008 arcsec/a	DEC: -0.027 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	1897	3	298°	16.2''	7.05	13.3	A7IVe	SEE 265
AC	1835	6	184°	44.2''	7.05	6.65	A0-3III	DUN 199
CD	1936	2	112°	1.3''	7.1	11.7	-	RST3930
	1945		105°	-

discoverer information:

discoverer code	discoverer	reference
SEE 265	See, T.J.	-
DUN 199	Dunlop, J.	-
RST3930	Rossiter, R.A.	-

notes:

note	AB: A is the semiregular variable V856 Sco. There are indications of a 14d spectroscopic companion. There is an extended circumstellar atmosphere, and C shares common proper motion and radial velocity.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 16h 5min 12.8sec

DEC: -38° 58' 23''

variability informations:

variability type	INA	eruptive variable star
magnitute at max. brightness	6.8
magnitute at min. brightness	8
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

A7IVe

references

to a study	Vol. III GCVS
to a chart/photograph	no chart is avaible, but the star is contained in the 'Cordoba Durchmusterung'

miscanellous

ID in the GCVS catalogue	73/856
constellation	Scorpius
notes on existence	The star is equivalent to '0730857 V0857'.
There are notes in published catalog.

variability type description

variability type

description

INA

Orion variables. Irregular, eruptive variables connected with bright or dark diffuse nebulae or observed in the regions of these nebulae. Some of them may show cyclic light variations caused by axial rotation. In the Spectrum-Luminosity diagram, they are found in the area of the main sequence and subgiants. They are probably young objects that, during the course of further evolution, will become light-constant stars on the zero-age main sequence (ZAMS). The range of brightness variations may reach several magnitudes. In the case of rapid light variations having been observed (up to 1 mag in 1-10 days), the letter "S" is added to the symbol for the type (INS). This type may be divided into the following subtypes: INA, INB, INT, IN(YY). INA Orion variables of early spectral types (B-A or Ae). They are often characterized by occasional abrupt Algol-like fadings (T Ori); INB Orion variables of intermediate and late spectral types, F-M or Fe-Me (BH Cep, AH Ori). F-type stars may show Algol-like fadings similar to those of many INA stars; K-M stars may produce flares along with irregular light variations; INT Orion variables of the T Tauri type. Stars are assigned to this type on the basis of the following (purely spectroscopic) criteria: spectral types are in the range Fe-Me. The spectra of most typical stars resemble the spectrum of the solar chromosphere. The feature specific to the type is the presence of the flourescent emission lines Fe II 4046, 4132 A (anomalously intense in the spectra of these stars), emission lines [Si II] and [O I], as well as the absorption line Li I 6707 A. These variables are usually observed only in diffuse nebulae. If it is not apparent that the star is associated with a nebula, the letter "N" in the symbol for the type may be omitted, e.g., IT (RW AUR); IN(YY) Some Orion variables (YY Ori) show the presence of absorption components on the redward sides of emission lines, indicating the infall of matter toward the stars' surfaces. In such cases, the symbol for the type may be accompanied by the symbol "YY".