Phad

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 Phad, g UMa, NSV 05379, 64 UMa, HR 4554, HD 103287, SAO 28179, FK5: 447
other names Phecda, Phekda, Phegda, Phekha, Phacd
constellation Ursa Major

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

note (category: star names): PHAD; Phecda; Phekda; Phegda; Phekha; Phacd.

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

position, motion, parallax:

position (J2000) RA: 11h 53min 49,8sec DEC: +53° 41' 41''
position (J1900) RA: 11h 48min 34,3sec DEC: +54° 15' 3''
proper motion (J2000) RA: 0,095 arcsec/a DEC: 0,012 arcsec/a
radial velocity -13 km/s
note: spectroscopic binaries
rotational velocity 168 km/s (uncertain) (variable)
trigonometric parallax 0,028 arcsec

magnitude

visual magnitude 2,44
(V on UBV Johnson system)

spectral / color information

spectral class A0Ve
B-V-magnitude 0
U-B-magnitude 0,02
R-I-magnitude -0,03
note (category: spectra): Variable emission of K line and possible variation in H alpha.
note (category: colors): Color excess E(B-V) = 0.00.

variability information

variable star identification 5379

miscellaneous information

note (category: group membership): "Dipper Stars;" Sirius group; UMa moving cluster.

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

position, motion, parallax:

position (J2000) RA: 11h 53min 49,836sec DEC: +53° 41' 41,13'' ±0,06 arcsec source: 15
proper motion (J2000) RA: 0,0107 arcsec/a DEC: 0,012 arcsec/a source: 25
radial velocity -13 km/s source: 25
trigonometric parallax 0,028 ±0,003 arcsec source: 25
galactic coord. (B1950) longitude: 140,84° latitude: 61,38°
GCI unit vector (J2000) X: -0,591872 Y: 0,015937 Z: 0,805874

magnitude:

visual 2,44 (observed) source: 25
photovisual 2,5 source: 2

spectral information:

spectral class A0 source: 96
Morgan-Keenan A0Ve source: 25
B-magnitude 2,44 ±0,05 B-V-magnitude 0
U-magnitude 2,46 ±0,05 U-B-magnitude 0,02

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
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: 11h 51min 12,566sec DEC: +53° 58' 21,98'' ±0,003 arcsec
position (J2000) RA: 11h 53min 49,835sec DEC: +53° 41' 41,15''
proper motion J1950 (FK4) RA: 0,0105 arcsec/a DEC: 0,007 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0107 arcsec/a DEC: 0,012 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 447
Durchmusterung BD+54 1475
Boss General Catalogue 16268
Henry Draper Catalogue 103287

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

position:

position (J1950) RA: 11h 51min 12,6sec DEC: +53° 58' 22''

variability informations:

magnitute at max. brightness 2,41
magnitute at min. brightness 2,45
photometric system visual, photovisual or Johnson's V

spectral information

spectral class A0

references

to a study 172304D (designation: GAMMA UMA)

miscanellous

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