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	k Psc, kap Psc, 8 Psc, HR 8911, HD 220825, SAO 128186, BD +0 4998, FK5: 884, WDS 23269+0115A
constellation	Pisces

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

position, motion, parallax:

position (J2000)	RA: 23h 26min 56sec	DEC: +1° 15' 20''
position (2000.72)	RA: 23h 26min 58sec	DEC: +1° 15' 34''
position (B1900)	RA: 23h 21min 48.3sec	DEC: +0° 42' 29''
proper motion (J2000)	RA: 0.089 arcsec/a	DEC: -0.097 arcsec/a
radial velocity	-3 km/s note: variable radial velocity
rotational velocity	41 km/s (uncertain) (variable)
trigonometric parallax	0.04 arcsec
galactic coordinates	longitude: 83.92°	latitude: -55.08°

magnitude

visual magnitude

4.94 (V on UBV Johnson system)

spectral / color information

spectral class	A0pCrSi:Sr:
B-V-magnitude	0.03
U-B-magnitude	-0.02
R-I-magnitude

note (category: spectra):

Oxygen deficient relative to magnesium. Many uranium lines; possibly the uncommon element holmium. Uranium and osmium may be due to supernova explosion in a nearby star.

variability information

variable star identification

Kap Psc

note (category: variability):

Alpha CV 4.91 - 4.96V, 0.58525:d. Period changes? Magnetic and spectrum variable, 0.5805d.

double/multiple star system information

number of components of multiple star system	3
separation	163.4 arcsec
mag difference (of double or brightest multiple)	7
component ID	AB
note	Worley (1978) update of the IDS

note (category: double and multiple data):

AB optical. Component A suspected occultation double.

miscellaneous information

note (category: group membership):

Member of Pleiades group.

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

position, motion, parallax:

position (J2000)	RA: 23h 26min 55.957sec	DEC: +1° 15' 20.07''	±0.06 arcsec	source: 15
position (2000.72)	RA: 23h 26min 58sec	DEC: +1° 15' 34''	JD: 2451809.25
proper motion (J2000)	RA: 0.0059 arcsec/a	DEC: -0.097 arcsec/a		source: 25
radial velocity	-3 km/s			source: 25
trigonometric parallax	0.04 arcsec		±0.004 arcsec	source: 25
galactic coord. (B1950)	longitude: 83.93°	latitude: -55.08°

magnitude:

visual	4.9 (observed)	source: 31
photovisual	4.9	source: 2

spectral information:

spectral class	A2		source: 96
Morgan-Keenan	A0pCrSi:Sr:		source: 25
B-magnitude	4.97 ±0.05	B-V-magnitude	0.03
U-magnitude	4.95 ±0.05	U-B-magnitude	-0.02

variability information:

source of data: 30

variability type	160
var. amplitude	0.08
var. period	0.59

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	163.4 arcsec
magnitude difference between brightest and second brightest component	7
position angle	344 °

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
31	CRM' (non-GCVS variable data)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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: 23h 24min 22.087sec	DEC: +0° 58' 53.91''	±0.004 arcsec
position (2000.72)	RA: 23h 26min 58sec	DEC: +1° 15' 39''	JD: 2451809.25
position (J2000)	RA: 23h 26min 55.954sec	DEC: +1° 15' 20.04''
proper motion B1950 (FK4)	RA: 0.0057 arcsec/a	DEC: -0.092 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0059 arcsec/a	DEC: -0.097 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A2p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 884
Durchmusterung	BD+00 4998
Boss General Catalogue	32620
Henry Draper Catalogue	220825

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

position and proper motion:

position (J2000)	RA: 23h 26.9min	DEC: +1° 15'
proper motion (J2000)	RA: 0.089 arcsec/a	DEC: -0.097 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	1824	9	345°	150.1''	4.94	11.9	-	S 830
	1921		344°	163.4''
BC	1907	1	154°	76.1''	11.9	13.1	-	S 830

discoverer information:

discoverer code	discoverer	reference
S 830	South, J.	-

notes:

note	Kappa Psc. An optical pair. Spectrum A0pCrSi:Sr:.

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

position:

position (equinox 1950.0)

RA: 23h 24min 22.1sec

DEC: +0° 58' 54''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	4.87
magnitute at min. brightness	4.95
photometric system	visual, photovisual or Johnson's V
period [d]	0.58525 (uncertain)

spectral information

spectral class

A0p(Cr-Sr-Si-Eu)

references

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

miscanellous

ID in the GCVS catalogue	66/9010
constellation	Pisces
notes on existence	The star is equivalent to '0670001 R'.

variability type description

variability type

description

ACV

Alpha2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields. Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually withine 0.01-0.1 mag in V. ACVO Rapidly oscillating Alpha2 CVn variables. These are nonradially pulsating, rotating magnetic variables of Ap spectral type (DO Eri). Pulsation periods are in the range of 6-12 mmag (0.004-0.01 days), while amplitudes of light variation caused by the pulsation are about 0.01 mag in V. The pulsational variations are superposed on those caused by rotation.