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

SU Cas, HR 829, HD 17463, SAO 12472, BD +68 200, FK5: 2195

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

position, motion, parallax:

position (J2000)	RA: 2h 51min 58.7sec	DEC: +68° 53' 19''
position (B1900)	RA: 2h 43min 2.8sec	DEC: +68° 28' 27''
proper motion (J2000)	RA: -0.006 arcsec/a	DEC: -0.004 arcsec/a
radial velocity	-7 km/s note: spectroscopic binaries
trigonometric parallax	0.01 arcsec
galactic coordinates	longitude: 133.47°	latitude: 8.52°

magnitude

visual magnitude

5.8 (V on UBV Johnson system)

spectral / color information

spectral class	F5:Ib-II
B-V-magnitude	0.64
U-B-magnitude	0.48

variability information

variable star identification

SU Cas

note (category: variability):

CDelta 5.78 - 6.16V, 1.949319d, possibly changing. RV varies in same period.

miscellaneous information

note (category: group membership):

In reflection nebulosity.

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

position, motion, parallax:

position (J2000)	RA: 2h 51min 58.783sec	DEC: +68° 53' 18.45''	±0.43 arcsec	source: 16
proper motion (J2000)	RA: 0.0007 arcsec/a	DEC: -0.01 arcsec/a		source: 25
radial velocity	-7 km/s			source: 25
trigonometric parallax	0.01 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 133.47°	latitude: 8.52°

magnitude:

visual	5.7 (observed)	source: 31
photographic	6.8	source: 16

spectral information:

spectral class	F5		source: 96
Morgan-Keenan	F5:Ib-II		source: 25
B-magnitude	6.44 ±0.05	B-V-magnitude	0.64
U-magnitude	6.92 ±0.05	U-B-magnitude	0.48

variability information:

source of data: 30

variability type	115
var. amplitude	0.48
var. period	1.95
var. epoch	2438001 2. December 1962, 12:00:00 UT
next max light	2452220.4 6. November 2001, 21:36:00 UT

sources:

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: 2h 47min 28.879sec	DEC: +68° 40' 59.22''	±0.021 arcsec
position (J2000)	RA: 2h 51min 58.772sec	DEC: +68° 53' 18.04''
proper motion B1950 (FK4)	RA: 0.0009 arcsec/a	DEC: -0.007 arcsec/a	±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0004 arcsec/a	DEC: -0.012 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6 (accuracy: 1 decimal)
source of visual magnitude data	Source cited in source catalog introduction.

spectral information:

spectral class	F5
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	GC, catalogue number: 3403
Durchmusterung	BD+68 200
Boss General Catalogue	3403
Henry Draper Catalogue	17463

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

position:

position (equinox 1950.0)

RA: 2h 47min 28.9sec

DEC: +68° 40' 59''

variability informations:

variability type	DCEPS	pulsating variable star
magnitute at max. brightness	5.7
magnitute at min. brightness	6.18
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2438000.598 2. December 1962, 02:21:07 UT
period [d]	1.949319
next maximum light [JD]	2452220.880105 7. November 2001, 09:07:21 UT
rising time	40 % of period

spectral information

spectral class

F5Ib-II-F7Ib-II

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue	18/21
constellation	Cassiopeia
notes on existence	The star is equivalent to '0180022 SV'.
There are notes in published catalog.

variability type description

variability type	description
DCEPS	These are Delta Cep variables having light amplitudes <0.5 mag in V (<0.7 mag in B) and almost symmetrical light curves (M-m approx. 0.4 - 0.5 periods); as a rule, their periods do not exceed 7 days. They are probably first-overtone pulsators and/or are in the first transition across the instability strip after leaving the main sequence (SU Cas).