Acamar


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 Acamar, q1Eri, NSV 01002, HR 897, HD 18622, SAO 216113, FK5: 106, WDS 02583-4018A
constellation Eridanus

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

note (category: star names): ACAMAR.

position, motion, parallax:

position (J2000) RA: 2h 58min 15,7sec DEC: -40 18' 17''
position (J1900) RA: 2h 54min 28,1sec DEC: -40 42' 19''
proper motion (J2000) RA: -0,045 arcsec/a DEC: 0,019 arcsec/a
radial velocity 12 km/s
note: spectroscopic binaries, double lined spectra
rotational velocity 74 km/s (uncertain) (variable)
trigonometric parallax 0,035 arcsec
note (category: dynamical parallaxes): 0.016".

magnitude

visual magnitude 3,24
(V on UBV Johnson system)

spectral / color information

spectral class A4III
B-V-magnitude 0,14
U-B-magnitude 0,14
R-I-magnitude 0,08

variability information

variable star identification 1002

double/multiple star system information

separation 8,3 arcsec
mag difference (of double or brightest multiple) 1,1
note Worley (1978) update of the IDS
note (category: double and multiple data): Binary with HR 898. Uncertain which component var. Combined mag. HR 897/8, 2.91V; combined colors, +0.125(B-V), +0.13(U-B).

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

position, motion, parallax:

position (J2000) RA: 2h 58min 15,696sec DEC: -40 18' 16,97'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0039 arcsec/a DEC: 0,019 arcsec/a source: 25
radial velocity 12 km/s source: 25
trigonometric parallax 0,035 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 247,85 latitude: -60,74
GCI unit vector (J2000) X: 0,543325 Y: 0,535145 Z: -0,646853

magnitude:

visual 3,24 (observed) source: 25
photovisual 3,4 source: 2
photographic 3,5 source: 2

spectral information:

spectral class A2 source: 29
Morgan-Keenan A5IV source: 25
B-magnitude 3,38 0,05 B-V-magnitude 0,14
U-magnitude 3,52 0,05 U-B-magnitude 0,14

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 8,3 arcsec
magnitude difference between brightest and second brightest component 1,1
position angle 91

component magnitude spectral class catalogue(s)/name(s)
A 3,24 A2 Acamar, q1Eridani, HR 897, HD 18622, SAO 216113
B 4,35 A2 q2Eridani, HR 898, HD 18623, SAO 216114

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
29 SAOJ2000
SAO on FK5 at J2000, 1989

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 2h 56min 21,882sec DEC: -40 30' 15,15'' 0,01 arcsec
position (J2000) RA: 2h 58min 15,691sec DEC: -40 18' 16,98''
proper motion J1950 (FK4) RA: -0,0045 arcsec/a DEC: 0,023 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0039 arcsec/a DEC: 0,019 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,4 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 106
Durchmusterung CD-40 771A
Boss General Catalogue 3584
Henry Draper Catalogue 18622

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

position and proper motion:

position (J2000) RA: 2h 58,3min DEC: -40 18'
proper motion (J2000) RA: -0,045 arcsec/a DEC: 0,019 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
- 1835 54 82 8,3'' 3,4 4,5 A4III A1V PZ 2
1990 91 -

discoverer information:

discoverer code discoverer reference
PZ 2 Piazzi, G. -

notes:

note Theta Eri. A is a spectroscopic binary. Proper motion of B -017 -006.

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

position:

position (J1950) RA: 2h 56min 22,6sec DEC: -40 30' 14''

variability informations:

variability type -
magnitute at max. brightness 2,91
magnitute at min. brightness
photometric system visual, photovisual or Johnson's V

spectral information

spectral class A3

references

to a study 0807D (designation: 48,49GERI)

miscanellous

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