15 Lyn


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 15 Lyn, HR 2560, HD 50522, SAO 26051, WDS 06573+5825A
constellation Lynx

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


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

position, motion, parallax:

position (J2000) RA: 6h 57min 16,5sec DEC: +58 25' 21''
position (J1900) RA: 6h 48min 37sec DEC: +58 33' 14''
proper motion (J2000) RA: -0,005 arcsec/a DEC: -0,135 arcsec/a
radial velocity 9 km/s
note: variable radial velocity
rotational velocity <25 km/s (uncertain) (variable)
trigonometric parallax 0,014 arcsec
note (category: dynamical parallaxes): 0.007".

magnitude

visual magnitude 4,35
(V on UBV Johnson system)

spectral / color information

spectral class G5III-IV
B-V-magnitude 0,85
U-B-magnitude 0,52
R-I-magnitude 0,44

double/multiple star system information

number of components of multiple star system 4
separation 0,9 arcsec
mag difference (of double or brightest multiple) 1,2
component ID AB
note (category: double and multiple data): AB binary. C, 13v at 29" optical. D, 9.5 at 207".

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

position, motion, parallax:

position (J2000) RA: 6h 57min 16,573sec DEC: +58 25' 21,64'' 0,35 arcsec source: 17
proper motion (J2000) RA: -0,0006 arcsec/a DEC: -0,133 arcsec/a source: 25
radial velocity 9 km/s source: 25
trigonometric parallax 0,014 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 157,77 latitude: 23,6
GCI unit vector (J2000) X: -0,129509 Y: 0,507381 Z: 0,851934

magnitude:

visual 4,35 (observed) source: 25
photovisual 4,5 source: 2
photographic 5,1 source: 16

spectral information:

spectral class G0 source: 96
Morgan-Keenan G5III-IV source: 25
B-magnitude 5,2 0,05 B-V-magnitude 0,85
U-magnitude 5,72 0,05 U-B-magnitude 0,52

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 1
position angle 66

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: 6h 52min 57,126sec DEC: +58 29' 26,92'' 0,01 arcsec
position (J2000) RA: 6h 57min 16,538sec DEC: +58 25' 21,48''
proper motion J1950 (FK4) RA: -0,0003 arcsec/a DEC: -0,136 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0006 arcsec/a DEC: -0,135 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,5 (accuracy: 2 decimals)
source of visual magnitude data Combined magnitude of component stars.

spectral information:

spectral class G0
source of spectral data Taken from the HD with M stars reclassified by Miss Cannon.

remarks for duplicity and variability

Double star - see source catalog for source

catalogues

source catalogue FK3, catalogue number: 265
Durchmusterung BD+58 982
Boss General Catalogue 9082
Henry Draper Catalogue 50522

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

position and proper motion:

position (J2000) RA: 6h 57,3min DEC: +58 25'
proper motion (J2000) RA: -0,005 arcsec/a DEC: -0,133 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 1843 often 323 0,5'' 4,7 5,7 G5III-IV STT 159
1990 66 0,1''
AC 1878 3 342 23,6'' 4,7 12,4 - STT 159
1924 346 29''
AD 1850 6 167 206,6'' 4,7 8,9 - STT 159
1924 - 197,4''

discoverer information:

discoverer code discoverer reference
STT 159 Struve, O. -

notes:

note 15 Lyn. P = 210yr., a = 1.03", motion direct.