Mirphak

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 Mirphak, a Per, NSV 01125, 33 Per, HR 1017, HD 20902, SAO 38787, FK5: 120, WDS 03243+4952
other names Marfak, Algenib, Mirfak
constellation Perseus

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

note (category: star names): MIRPHAK; Mirfak; Marfak; Algenib.

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

position, motion, parallax:

position (J2000) RA: 3h 24min 19,4sec DEC: +49° 51' 40''
position (J1900) RA: 3h 17min 10,8sec DEC: +49° 30' 19''
proper motion (J2000) RA: 0,024 arcsec/a DEC: -0,025 arcsec/a
radial velocity -2 km/s
note: variable radial velocity
rotational velocity 18 km/s (uncertain) (variable)
trigonometric parallax 0,016 arcsec

magnitude

visual magnitude 1,79
(V on UBV Johnson system)

spectral / color information

spectral class F5Ib
B-V-magnitude 0,48
U-B-magnitude 0,37
R-I-magnitude 0,33

variability information

variable star identification 1125

double/multiple star system information

separation 167 arcsec
mag difference (of double or brightest multiple) 10
note Worley (1978) update of the IDS

miscellaneous information

note (category: group membership): Mel 20 #605; Per OB3; nebulosity.

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

position, motion, parallax:

position (J2000) RA: 3h 24min 19,365sec DEC: +49° 51' 40,34'' ±0,06 arcsec source: 15
proper motion (J2000) RA: 0,0025 arcsec/a DEC: -0,025 arcsec/a source: 25
radial velocity -2 km/s source: 25
trigonometric parallax 0,016 ±0,002 arcsec source: 25
galactic coord. (B1950) longitude: 146,57° latitude: -5,86°
GCI unit vector (J2000) X: 0,40498 Y: 0,501551 Z: 0,764485

magnitude:

visual 1,79 (observed) source: 25
photovisual 1,9 source: 2

spectral information:

spectral class F5 source: 96
Morgan-Keenan F5Ib source: 25
B-magnitude 2,27 ±0,05 B-V-magnitude 0,48
U-magnitude 2,64 ±0,05 U-B-magnitude 0,37

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 166,6 arcsec
magnitude difference between brightest and second brightest component 10,1
position angle 196 °

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 (J1950) RA: 3h 20min 44,441sec DEC: +49° 41' 6,04'' ±0,004 arcsec
position (J2000) RA: 3h 24min 19,371sec DEC: +49° 51' 40,31''
proper motion J1950 (FK4) RA: 0,0026 arcsec/a DEC: -0,022 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0025 arcsec/a DEC: -0,025 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 1,9 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class F5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 120
Durchmusterung BD+49 917
Boss General Catalogue 4041
Henry Draper Catalogue 20902

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

position and proper motion:

position (J2000) RA: 3h 24,3min DEC: +49° 52'
proper motion (J2000) RA: 0,024 arcsec/a DEC: -0,025 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
- 1879 3 196° 166'' 1,79 11,9 F5Ib BUP 44
1924 - 166,6''

discoverer information:

discoverer code discoverer reference
BUP 44 - -

notes:

note Alpha Per.

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

position:

position (J1950) RA: 3h 20min 44,4sec DEC: +49° 41' 6''

variability informations:

magnitute at max. brightness 1,72
magnitute at min. brightness 1,86
photometric system visual, photovisual or Johnson's V

spectral information

spectral class F5

references

to a study 140106D (designation: ALPHA PER)

miscanellous

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