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	o And, omi And, 1 And, HR 8762, HD 217675, SAO 52609, BD +41 4664, FK5: 869, WDS 23019+4220A
constellation	Andromeda

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

position, motion, parallax:

position (J2000)	RA: 23h 1min 55.3sec	DEC: +42° 19' 34''
position (B1900)	RA: 22h 57min 19.1sec	DEC: +41° 47' 19''
proper motion (J2000)	RA: 0.023 arcsec/a	DEC: -0.006 arcsec/a
radial velocity	-14 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible
rotational velocity	330 km/s (uncertain) (variable)
trigonometric parallax	0.015 arcsec
galactic coordinates	longitude: 102.21°	latitude: -16.1°

note (category: radial and/or rotational velocities):

23.5y. vsini about 300k/s.

magnitude

visual magnitude

3.62 (V on UBV Johnson system)

spectral / color information

spectral class	B6IIIpe+A2p
B-V-magnitude	-0.09
U-B-magnitude	-0.53
R-I-magnitude

note (category: spectra):

Shell star. Also classified B5III or B6IVpe.

variability information

variable star identification

Omi And

note (category: variability):

Gamma Cas 3.58 - 3.65V. Photometric investigations have indicated numerous periods, particularly 0.78823, 1.0815d and 1.5998398d, all doubtful. Form of light curve varies. Probably not an eclipsing binary. Period shell phenomena about 23.5y. Shell features have vanished several times since 1897. H gamma varies in 3.66?d.

double/multiple star system information

number of components of multiple star system	4
separation	0.3 arcsec
mag difference (of double or brightest multiple)	0.5
component ID	S
note	doublicity discoverd by speckle interferometry

note (category: double and multiple data):

Separate speckle interferometric measures give sep. 0.05" (Aa) and 0.34" (AB). Ten years of observations reveal steady change in AB position angle of about 10d with decrease in separation from about 0.375" to 0.266". Component B identified as SB2 (see SB remarks), making total number of components at least 4.

note (category: spectroscopic binaries):

Speckle interferometry indicates triple star. SB periods 72.3145, 8585 or 9478d. Also short period 1.5845, 0.84, 3.66 or 1.67458d, all doubtful. Observations by Hill et al. (1988, PASP, 100, 243) indicate that one of the companions of A is SB2, and they identify this as component B. Orbit for B: 33.01d, V0 -14.3k/s, K1 54.8k/s, K2 71.6k/s, m1sin3i 3.74, m2sin3i 2.86, a1sini 0.161, a2sini 0.211.

miscellaneous information

note (category: group membership):

In reflection nebula; probably but not certainly associated.

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

position, motion, parallax:

position (J2000)	RA: 23h 1min 55.267sec	DEC: +42° 19' 33.5''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.006 arcsec/a		source: 25
radial velocity	-14 km/s			source: 25
trigonometric parallax	0.015 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 102.21°	latitude: -16.1°

magnitude:

visual	3.62 (observed)	source: 25
photovisual	3.6	source: 2

spectral information:

spectral class	B5		source: 96
Morgan-Keenan	B6IIIpe		source: 25
B-magnitude	3.53 ±0.05	B-V-magnitude	-0.09
U-magnitude	3 ±0.05	U-B-magnitude	-0.53

variability information:

source of data: 27

variability type	264
var. amplitude	0.2

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component

0.1 arcsec

component	magnitude	spectral class	catalogue(s)/name(s)
A	3.62	B5	o Andromedae, 1 And, HR 8762, HD 217675, SAO 52609
B	3.58	+++

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
27	Catalog of Red Magnitudes (CRM)
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: 22h 59min 36.873sec	DEC: +42° 3' 25.12''	±0.004 arcsec
position (J2000)	RA: 23h 1min 55.27sec	DEC: +42° 19' 33.65''
proper motion B1950 (FK4)	RA: 0.0019 arcsec/a	DEC: 0 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0021 arcsec/a	DEC: -0.005 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.6 (accuracy: 2 decimals)
source of visual magnitude data	Arithmetic mean of maximum and minimum magnitudes of a variable star

spectral information:

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

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue	FK4, catalogue number: 869
Durchmusterung	BD+41 4664
Boss General Catalogue	32095
Henry Draper Catalogue	217675 The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

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

position and proper motion:

position (J2000)	RA: 23h 1.9min	DEC: +42° 20'
proper motion (J2000)	RA: 0.023 arcsec/a	DEC: -0.006 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
Aa	1975	8	°	0.1''	3.62	-	B6III+A2	BLA
Aa-B	1976	37	7°	0.4''	3.6	-	-	WRH
	1993		340°	0.2''

discoverer information:

discoverer code	discoverer	reference
BLA	Blazit, A. et al
WRH	Wilson, R.H.

notes:

note	Aa: Omicron And. Spectrum composite: B6IIIpe+A2p. There appear to be both short and long period light variations. Aa-B: P = 68.6yr., a = 0.277", motion retrograde. B has been reported to be a double-lined spectroscopic binary, P = 33.01d.

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

position:

position (equinox 1950.0)

RA: 22h 59min 36.9sec

DEC: +42° 3' 25''

variability informations:

variability type	GCAS	eruptive variable star
magnitute at max. brightness	3.58
magnitute at min. brightness	3.78
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

B6IIIpe+A2p

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	1/9015
constellation	Andromeda
There are notes in published catalog.

variability type description

variability type	description
GCAS	Eruptive irregular variables of the Gamma Cas type. These are rapidly rotating B III-IVe stars with mass outflow from their equatorial zones. The formation of equatorial rings or disks is often accompanied by temporary fading. Light amplitudes may reach 1.5 mag in V.