n2Bootis


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


catalogues and names n2Boo, NSV 20328, 53 Boo, HR 5774, HD 138629, SAO 45590, WDS 15318+4054
constellation Bootes

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


position, motion, parallax:

position (J2000) RA: 15h 31min 47sec DEC: +40 53' 58''
position (J1900) RA: 15h 28min 12,1sec DEC: +41 14' 19''
proper motion (J2000) RA: -0,017 arcsec/a DEC: -0,009 arcsec/a
radial velocity -17 km/s
note: suspected variable radial velocity
rotational velocity 182 km/s (uncertain) (variable)
trigonometric parallax 0,02 arcsec

magnitude

visual magnitude 5,02
(V on UBV Johnson system)

spectral / color information

spectral class A5V
B-V-magnitude 0,07
U-B-magnitude 0,11
R-I-magnitude 0,04
note (category: spectra): Shell star.

double/multiple star system information

number of components of multiple star system 3
separation 0,1 arcsec
mag difference (of double or brightest multiple) 0
component ID AB
note (category: double and multiple data): Combined mag., colors. Companion resolved by speckle interferometry, sep. 0.040" on 1985.5.

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

position, motion, parallax:

position (J2000) RA: 15h 31min 46,977sec DEC: +40 53' 57,86'' 0,35 arcsec source: 17
proper motion (J2000) RA: -0,0016 arcsec/a DEC: -0,009 arcsec/a source: 25
radial velocity -17 km/s source: 25
trigonometric parallax 0,02 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 66,17 latitude: 54,41
GCI unit vector (J2000) X: -0,45546 Y: -0,603226 Z: 0,654733

magnitude:

visual 5,02 (observed) source: 25
photovisual 5 source: 2
photographic 5 source: 16

spectral information:

spectral class A2 source: 96
Morgan-Keenan A5V source: 25
B-magnitude 5,09 0,05 B-V-magnitude 0,07
U-magnitude 5,2 0,05 U-B-magnitude 0,11

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 0,1 arcsec
magnitude difference between brightest and second brightest component 0

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
16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
17 ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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: 15h 29min 59,475sec DEC: +41 4' 5,26'' 0,013 arcsec
position (J2000) RA: 15h 31min 46,993sec DEC: +40 53' 57,96''
proper motion J1950 (FK4) RA: -0,0019 arcsec/a DEC: -0,012 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0015 arcsec/a DEC: -0,009 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

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

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 20883
Durchmusterung BD+41 2611
Boss General Catalogue 20883
Henry Draper Catalogue 138629

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

position and proper motion:

position (J2000) RA: 15h 31,8min DEC: +40 54'
proper motion (J2000) RA: -0,018 arcsec/a DEC: -0,009 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
AB 1907 31 0,1'' 5,8 5,8 A5V A 1634
AB-C 1913 - 89 92,6'' - 13 - BU 1450
AB-D 1984 1 320 121,1'' 5,1 13 - KZA 97

discoverer information:

discoverer code discoverer reference
A 1634 Aitken, R.G. -
BU 1450 Burnham, S.W. -
KZA 97 Kazeza, S.M. -

notes:

note Nu (2) Boo. An example of adequate resolution provided only by speckle: P = 8.48yr., a = 0.060", motion retrograde.