Electra


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


catalogues and names Electra, NSV 15755, 17 Tau, HR 1142, HD 23302, SAO 76131, FK5: 136
constellation Taurus

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

note (category: star names): Electra.

position, motion, parallax:

position (J2000) RA: 3h 44min 52,5sec DEC: +24 6' 48''
position (J1900) RA: 3h 38min 56,1sec DEC: +23 47' 57''
proper motion (J2000) RA: 0,019 arcsec/a DEC: -0,046 arcsec/a
radial velocity 12 km/s
note: spectroscopic binaries, single lined spectra
note: orbital data avaible
rotational velocity 215 km/s (uncertain) (variable)
trigonometric parallax 0,02 arcsec

magnitude

visual magnitude 3,7
(V on UBV Johnson system)

spectral / color information

spectral class B6III
B-V-magnitude -0,11
U-B-magnitude -0,4
R-I-magnitude -0,1

double/multiple star system information

separation 0 arcsec
mag difference (of double or brightest multiple) 2
note doublicity discoverd by occultation
note (category: double and multiple data): Sep. 0.062". Occultation of 1972 Mar. 19 indicated mag. diff 3.4, sep. 0.010".
note (category: spectroscopic binaries): 4.0, 6.0, sep. 0.002", 100.46d, K 26.0k/s, V0 -0.3k/s, asini 30.7. Unresolved by speckle interferometry.

miscellaneous information

note (category: group membership): Pleiades cluster; Mel 22 #468; in reflection nebula; Pleiades nebula. Member assoc. Tau R1 at 110 pc.

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

position, motion, parallax:

position (J2000) RA: 3h 44min 52,532sec DEC: +24 6' 48,01'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0014 arcsec/a DEC: -0,046 arcsec/a source: 25
radial velocity 12 km/s source: 25
trigonometric parallax 0,02 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 166,19 latitude: -23,85
GCI unit vector (J2000) X: 0,507503 Y: 0,758639 Z: 0,408543

magnitude:

visual 3,7 (observed) source: 25
photovisual 3,8 source: 2

spectral information:

spectral class B5 source: 96
Morgan-Keenan B6III source: 25
B-magnitude 3,59 0,05 B-V-magnitude -0,11
U-magnitude 3,19 0,05 U-B-magnitude -0,4

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 0 arcsec
magnitude difference between brightest and second brightest component 2

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: 3h 41min 54,055sec DEC: +23 57' 27,82'' 0,005 arcsec
position (J2000) RA: 3h 44min 52,524sec DEC: +24 6' 48,15''
proper motion J1950 (FK4) RA: 0,0014 arcsec/a DEC: -0,042 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0013 arcsec/a DEC: -0,045 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B5p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 136
Durchmusterung BD+23 507
Boss General Catalogue 4477
Henry Draper Catalogue 23302