i Cancri

The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names i Cnc, NSV 04238, 48 Cnc, HR 3474, HD 74738, SAO 80415, WDS 08467+2846B
constellation Cancer

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


object is infrared source (uncertain identification)

position, motion, parallax:

position (J2000) RA: 8h 46min 40sec DEC: +28° 45' 55''
position (J1900) RA: 8h 40min 36,9sec DEC: +29° 7' 51''
proper motion (J2000) RA: -0,018 arcsec/a DEC: -0,041 arcsec/a
radial velocity 15 km/s
rotational velocity 200 km/s (uncertain) (variable)
trigonometric parallax 0,017 arcsec
note (category: dynamical parallaxes): 0.023".

magnitude

visual magnitude 6,57
(V on UBV Johnson system)

spectral / color information

spectral class A3V
B-V-magnitude 0,04
U-B-magnitude 0,04

variability information

variable star identification 4238
note (category: variability): The magnitude difference between HR 3474 and 3475 appears to vary.

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 3475.

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

position, motion, parallax:

position (J2000) RA: 8h 46min 39,965sec DEC: +28° 45' 53,57'' ±0,35 arcsec source: 17
proper motion (J2000) RA: -0,0023 arcsec/a DEC: -0,051 arcsec/a source: 25
radial velocity 15 km/s source: 25
trigonometric parallax 0,017 ±0,002 arcsec source: 25
galactic coord. (B1950) longitude: 195,88° latitude: 36,54°
GCI unit vector (J2000) X: -0,58276 Y: 0,654845 Z: 0,481216

magnitude:

visual 6,57 (observed) source: 25
photovisual 6,6 source: 2
photographic 6,7 source: 16

spectral information:

spectral class A5 source: 96
Morgan-Keenan A3V source: 25
B-magnitude 6,61 ±0,05 B-V-magnitude 0,04
U-magnitude 6,65 ±0,05 U-B-magnitude 0,04

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 30,4 arcsec
magnitude difference between brightest and second brightest component 2,5

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
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
17 ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991
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 (J1950) RA: 8h 43min 38,685sec DEC: +28° 56' 57,95'' ±0,038 arcsec
position (J2000) RA: 8h 46min 40,022sec DEC: +28° 45' 54,67''
proper motion J1950 (FK4) RA: -0,0013 arcsec/a DEC: -0,044 arcsec/a ±0,007 arcsec/a in RA
±0,007 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0014 arcsec/a DEC: -0,04 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 6,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 12080
Durchmusterung BD+29 1823
Boss General Catalogue 12080
Henry Draper Catalogue 74738

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 (J1950) 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)).