Deneb Kaitos

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. Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names Deneb Kaitos, b Cet, NSV 00272, 16 Cet, HR 188, HD 4128, SAO 147420, FK5: 22
other names Diphda, Difda, Difda al Thani, Rana Secunda, Second Frog (the)
constellation Cetus

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

note (category: star names): DIPHDA; Deneb Kaitos; Difda; Difda al Thani; Rana Secunda, the "Second Frog" (the "First Frog" is Fomalhaut = HR 8728).

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 0h 43min 35,4sec DEC: -17 59' 12''
position (J1900) RA: 0h 38min 34,2sec DEC: -18 32' 8''
proper motion (J2000) RA: 0,234 arcsec/a DEC: 0,033 arcsec/a
radial velocity 13 km/s
note: suspected variable radial velocity
rotational velocity 18 km/s (uncertain) (variable)
trigonometric parallax 0,061 arcsec


visual magnitude 2,04
(V on UBV Johnson system)

spectral / color information

spectral class G9.5IIICH-1
B-V-magnitude 1,02
U-B-magnitude 0,87
R-I-magnitude 0,51

variability information

variable star identification 272
note (category: variability): 1.96 - 2.11V.

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

position, motion, parallax:

position (J2000) RA: 0h 43min 35,372sec DEC: -17 59' 11,82'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0164 arcsec/a DEC: 0,033 arcsec/a source: 25
radial velocity 13 km/s source: 25
trigonometric parallax 0,061 0,006 arcsec source: 25
galactic coord. (B1950) longitude: 111,36 latitude: -80,68
GCI unit vector (J2000) X: 0,933977 Y: 0,179811 Z: -0,308795


visual 2,04 (observed) source: 25
photovisual 2,2 source: 2
photographic 3,2 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan G9IIICH-1CN0.5Ca1 source: 25
B-magnitude 3,06 0,05 B-V-magnitude 1,02
U-magnitude 3,93 0,05 U-B-magnitude 0,87


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
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: 0h 41min 4,811sec DEC: -18 15' 38,78'' 0,004 arcsec
position (J2000) RA: 0h 43min 35,383sec DEC: -17 59' 11,85''
proper motion J1950 (FK4) RA: 0,0163 arcsec/a DEC: 0,036 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0165 arcsec/a DEC: 0,032 arcsec/a
source of proper motion data Determined by source catalog


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

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 22
Durchmusterung BD-18 115
Boss General Catalogue 865
Henry Draper Catalogue 4128

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


position (J1950) RA: 0h 41min 4,8sec DEC: -18 15' 39''

variability informations:

magnitute at max. brightness 1,96
magnitute at min. brightness 2,11
photometric system visual, photovisual or Johnson's V

spectral information

spectral class K0


to a study 230895D (designation: BETA CET)