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 (suspected variables)

catalogues and names

catalogues and names	i Cnc, NSV 04238, 48 Cnc, HR 3475, HD 74739, SAO 80416, BD +29 1824, FK5: 328, WDS 08467+2846A
constellation	Cancer

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

position, motion, parallax:

position (J2000)	RA: 8h 46min 41.8sec	DEC: +28° 45' 36''
position (B1900)	RA: 8h 40min 38.8sec	DEC: +29° 7' 33''
proper motion (J2000)	RA: -0.025 arcsec/a	DEC: -0.042 arcsec/a
radial velocity	16 km/s
rotational velocity	<19 km/s
trigonometric parallax	0.017 arcsec
galactic coordinates	longitude: 195.88°	latitude: 36.54°

note (category: dynamical parallaxes):

0.023".

magnitude

visual magnitude

4.02 (V on UBV Johnson system)

spectral / color information

spectral class	G7.5IIIaBa0.1
B-V-magnitude	1.01
U-B-magnitude	0.78
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

Also classified G8II.

variability information

variable star identification

4238

note (category: variability):

Probably NSV 4238.

double/multiple star system information

separation	30.4 arcsec
mag difference (of double or brightest multiple)	2.5

note (category: double and multiple data):

Binary with HR 3474.

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

position, motion, parallax:

position (J2000)	RA: 8h 46min 41.813sec	DEC: +28° 45' 35.68''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: -0.0019 arcsec/a	DEC: -0.042 arcsec/a		source: 25
radial velocity	16 km/s			source: 25
trigonometric parallax	0.017 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 195.89°	latitude: 36.54°

magnitude:

visual	4.02 (observed)	source: 25
photovisual	4.2	source: 2

spectral information:

spectral class	G5		source: 96
Morgan-Keenan	G8II-III		source: 25
B-magnitude	5.03 ±0.05	B-V-magnitude	1.01
U-magnitude	5.81 ±0.05	U-B-magnitude	0.78

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	30.4 arcsec
magnitude difference between brightest and second brightest component	2.55
position angle	307 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	4.02	G5	i Cancri, 48 Cnc, HR 3475, HD 74739, SAO 80416
B	6.57	A5	i Cancri, 48 Cnc, HR 3474, HD 74738, SAO 80415

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
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: 8h 43min 40.514sec	DEC: +28° 56' 39.19''	±0.004 arcsec
position (J2000)	RA: 8h 46min 41.817sec	DEC: +28° 45' 35.76''
proper motion B1950 (FK4)	RA: -0.0018 arcsec/a	DEC: -0.045 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0019 arcsec/a	DEC: -0.041 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	G5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 328
Durchmusterung	BD+29 1824
Boss General Catalogue	12083
Henry Draper Catalogue	74739

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

position and proper motion:

position (J2000)	RA: 8h 46.7min	DEC: +28° 46'
proper motion (J2000)	RA: -0.025 arcsec/a	DEC: -0.042 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
-	1828	49	307°	30.4''	4.03	6.58	G7.5IIIa	STF1268

discoverer information:

discoverer code	discoverer	reference
STF1268	Struve, F.G.W.	-

notes:

note	Iota Cnc. B is CD-29@1823. Proper motion of B -017 -043, spectral type A3V.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 8h 43min 40.5sec

DEC: +28° 56' 39''

variability informations:

variability type	-
magnitute at min. brightness
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

*

references

to a study

0132D (designation: 1268)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).