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 (Vol. I-III)

catalogues and names

catalogues and names

AO Cas, HR 65, HD 1337, SAO 21273, BD +50 46

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

position, motion, parallax:

position (J2000)	RA: 0h 17min 43sec	DEC: +51° 25' 59''
position (B1900)	RA: 0h 12min 24.8sec	DEC: +50° 52' 39''
proper motion (J2000)	RA: -0.005 arcsec/a	DEC: -0.004 arcsec/a
radial velocity	-35 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible
rotational velocity	135 km/s (uncertain) (variable)
galactic coordinates	longitude: 117.59°	latitude: -11.09°

magnitude

visual magnitude

6.14 (V on UBV Johnson system)

spectral / color information

spectral class	O9IIInn
B-V-magnitude	-0.13
U-B-magnitude	-0.97
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

Also classified O9IIIn, O9.5III, O8, and O9.5I. There are also indications of two O9III components.

variability information

variable star identification

AO Cas

note (category: variability):

EB 5.96 - 6.11B, 6.07 - 6.24V, O9III+O9III, 3.523487d. Spontaneous var. in period. Polarization indicates circumstellar envelope possibly related to mass exchange.

double/multiple star system information

note (category: spectroscopic binaries):

3.5236d, K 223.4k/s, V0 -31.1k/s, msin3i 10.1, asini 10.8. Apsidal period about 70y? vsini of secondary 145k/s.

miscellaneous information

note (category: group membership):

In neutral hydrogen region.

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

position, motion, parallax:

position (J2000)	RA: 0h 17min 42.984sec	DEC: +51° 25' 59.15''	±0.43 arcsec	source: 16
proper motion (J2000)	RA: -0.0018 arcsec/a	DEC: -0.001 arcsec/a		source: 25
radial velocity	-35 km/s			source: 25
galactic coord. (B1950)	longitude: 117.59°	latitude: -11.09°

magnitude:

visual	6.069 (observed)	source: 31
photovisual	6.1	source: 2
photographic	5.9	source: 16

spectral information:

spectral class	B0		source: 96
Morgan-Keenan	O9IIInn		source: 25
B-magnitude	6.01 ±0.05	B-V-magnitude	-0.13
U-magnitude	5.04 ±0.05	U-B-magnitude	-0.97

variability information:

source of data: 30

variability type	10
var. amplitude	0.17
var. period	3.52
var. epoch	2432191 5. January 1947, 12:00:00 UT
next max light	2452219.8 6. November 2001, 07:12:00 UT

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
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: 0h 15min 3.347sec	DEC: +51° 9' 19.8''	±0.026 arcsec
position (J2000)	RA: 0h 17min 43.039sec	DEC: +51° 25' 59.04''
proper motion B1950 (FK4)	RA: -0.0007 arcsec/a	DEC: 0.001 arcsec/a	±0.005 arcsec/a in RA ±0.004 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0005 arcsec/a	DEC: -0.004 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.1 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	B0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 345
Durchmusterung	BD+50 46
Boss General Catalogue	345
Henry Draper Catalogue	1337

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

position:

position (equinox 1950.0)

RA: 0h 15min 3.3sec

DEC: +51° 9' 20''

variability informations:

variability type	ELL/KE	rotating variable star close binary eclipsing system
magnitute at max. brightness	6.07
magnitute at min. brightness	6.24
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2432191.189 5. January 1947, 16:32:10 UT
period [d]	3.523487
next maximum light [JD]	2452222.212595 8. November 2001, 17:06:08 UT

spectral information

spectral class

O9III+O9III

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	18/68
constellation	Cassiopeia
notes on existence	The star is equivalent to '0180069 AP'.
There are notes in published catalog.

variability type description

variability type	description
ELL	Rotating ellipsoidal variables (b Per, Alpha Vir). These are close binary systems with ellipsoidal components, which change combined brightnesses with periods equal to those of orbital motion because of changes in emitting areas toward an observer, but showing no eclipses. Light amplitudes do not exceed 0.1 mag in V.
KE	Contact systems of early (O-A) spectral type, both components being close in size to their inner critical surfaces.