Hamal


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 Hamal, a Ari, NSV 00725, 13 Ari, HR 617, HD 12929, SAO 75151, FK5: 74
other names Hemal, Hamul, Ras Hammel, Arietis
constellation Aries

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

note (category: star names): HAMAL; Hemal; Hamul; Ras Hammel; El Nath (obsolete). The name Arietis also used both for the star and the constellation.

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

position, motion, parallax:

position (J2000) RA: 2h 7min 10,4sec DEC: +23 27' 45''
position (J1900) RA: 2h 1min 32sec DEC: +22 59' 23''
proper motion (J2000) RA: 0,19 arcsec/a DEC: -0,148 arcsec/a
radial velocity -14 km/s
note: spectroscopic binaries
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,049 arcsec

magnitude

visual magnitude 2
(V on UBV Johnson system)

spectral / color information

spectral class K2-IIICa-1
B-V-magnitude 1,15
U-B-magnitude 1,12
R-I-magnitude 0,62
note (category: spectra): Also classified K2IIIab Ca-1.

variability information

variable star identification 725

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

position, motion, parallax:

position (J2000) RA: 2h 7min 10,403sec DEC: +23 27' 44,66'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0138 arcsec/a DEC: -0,148 arcsec/a source: 25
radial velocity -14 km/s source: 25
trigonometric parallax 0,049 0,005 arcsec source: 25
galactic coord. (B1950) longitude: 144,58 latitude: -36,2
GCI unit vector (J2000) X: 0,779681 Y: 0,483297 Z: 0,398147

magnitude:

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

spectral information:

spectral class K2 source: 96
Morgan-Keenan K2-IIIabCa-1 source: 25
B-magnitude 3,15 0,05 B-V-magnitude 1,15
U-magnitude 4,27 0,05 U-B-magnitude 1,12

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: 2h 4min 20,917sec DEC: +23 13' 37,07'' 0,003 arcsec
position (J2000) RA: 2h 7min 10,398sec DEC: +23 27' 44,61''
proper motion J1950 (FK4) RA: 0,0138 arcsec/a DEC: -0,144 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0138 arcsec/a DEC: -0,149 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 74
Durchmusterung BD+22 306
Boss General Catalogue 2538
Henry Draper Catalogue 12929

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

position:

position (J1950) RA: 2h 4min 20,9sec DEC: +23 13' 37''

variability informations:

magnitute at max. brightness 1,98
magnitute at min. brightness 2,04
photometric system visual, photovisual or Johnson's V

spectral information

spectral class K2

references

to a study 0807D (designation: ALPHA ARI)

miscanellous

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