Alamak


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. 4th Catalog of Orbits of Visual Binaries


catalogues and names Alamak, g1And, 57 And, HR 603, HD 12533, SAO 37734, FK5: 73, WDS 02039+4220A
other names Almaak, Almach, Almak, Almaach
constellation Andromeda

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

note (category: star names): ALMAAK; Almach; Alamak; Almak; Almaach.

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

position, motion, parallax:

position (J2000) RA: 2h 3min 54sec DEC: +42 19' 47''
position (J1900) RA: 1h 57min 45,4sec DEC: +41 51' 0''
proper motion (J2000) RA: 0,045 arcsec/a DEC: -0,052 arcsec/a
radial velocity -12 km/s
note: spectroscopic binaries
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,013 arcsec

magnitude

visual magnitude 2,26
(V on UBV Johnson system)

spectral / color information

spectral class K3-IIb
B-V-magnitude 1,37
U-B-magnitude 1,58
R-I-magnitude 0,68

double/multiple star system information

number of components of multiple star system 4
separation 9,6 arcsec
mag difference (of double or brightest multiple) 2,8
component ID AxBC
note (category: double and multiple data): CPM with HR 604.

miscellaneous information

note (category: group membership): Red star Pleiades group.

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

position, motion, parallax:

position (J2000) RA: 2h 3min 53,963sec DEC: +42 19' 46,99'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,004 arcsec/a DEC: -0,052 arcsec/a source: 25
radial velocity -12 km/s source: 25
trigonometric parallax 0,013 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 136,97 latitude: -18,56
GCI unit vector (J2000) X: 0,633855 Y: 0,38048 Z: 0,673396

magnitude:

visual 2,26 (observed) source: 25
photovisual 2,3 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K3-IIb source: 25
B-magnitude 3,63 0,05 B-V-magnitude 1,37
U-magnitude 5,21 0,05 U-B-magnitude 1,58

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 9,6 arcsec
magnitude difference between brightest and second brightest component 2,58
position angle 63

component magnitude spectral class catalogue(s)/name(s)
A 2,26 K0 Alamak, g1Andromedae, 57 And, HR 603, HD 12533, SAO 37734
B 4,84 A0 g2Andromedae, 57 And, HR 604, HD 12534, SAO 37735

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: 2h 0min 49,177sec DEC: +42 5' 27,01'' 0,003 arcsec
position (J2000) RA: 2h 3min 53,977sec DEC: +42 19' 46,96''
proper motion J1950 (FK4) RA: 0,0041 arcsec/a DEC: -0,048 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0042 arcsec/a DEC: -0,052 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,3 (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.

catalogues

source catalogue FK4, catalogue number: 73
Durchmusterung BD+41 395A
Boss General Catalogue 2477
Henry Draper Catalogue 12533

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

position and proper motion:

position (J2000) RA: 2h 3,9min DEC: +42 20'
proper motion (J2000) RA: 0,045 arcsec/a DEC: -0,052 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
A-BC 1830 often 63 10,3'' 2,26 4,84 K3IIb STF 205
1987 - 9,6''
AD 1898 1 245 27,9'' - 15 K3IIb BAR 22
BC 1842 often '' 5,1 6,3 B8V+A0V STT 38

discoverer information:

discoverer code discoverer reference
STF 205 Struve, F.G.W. -
BAR 22 Barnard, E.E. -
STT 38 Struve, O. -

notes:

note H III 5, SHJ 26. Gamma And. BC: P = 61yr., a = -.30", motion retrograde. B is a spectroscopic binary.

data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)

position:

position (J1900) RA: 1h 57,8min DEC: +41 51'

magnitudes, spectral classes, orbital elements:

author: P. Muller
date of observation: 1955
magnitude of component A: 5,3
magnitude of component B: 5,3
spectral class component B: B8V
spectral class component B: B8V
period [y]: 61,1
semi-major axis [arcsec]: 0,296
inclination [deg]: 111,1
node [deg]: 104,15
equinox of node: 1950
eccentricity: 0,93
time of periastron passage: 1952,1
dates of ephemeris: 1950-1970
grade: good
reference: J. Observateurs 40, 52; 1957.
notes A quadruple system. Star A (mag. 2.3, K3II) forms with BC the pair STF 205, separation 10". Star B is a spectroscopic binary, P = 2.67 d (Maestre and Wright, Astrophys. J. 131, 119; 1960).