57 Aql


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 57 Aql, HR 7593, HD 188293, SAO 143898, WDS 19546-0814A
constellation Aquila

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


position, motion, parallax:

position (J2000) RA: 19h 54min 37,6sec DEC: -8 13' 38''
position (J1900) RA: 19h 49min 12,8sec DEC: -8 29' 16''
proper motion (J2000) RA: 0,01 arcsec/a DEC: -0,025 arcsec/a
radial velocity -6 km/s
note: spectroscopic binaries
rotational velocity 340 km/s (uncertain) (variable)
trigonometric parallax 0,01 arcsec

magnitude

visual magnitude 5,71
(V on UBV Johnson system)

spectral / color information

spectral class B7Vn
B-V-magnitude -0,08
U-B-magnitude -0,48

double/multiple star system information

separation 35,7 arcsec
mag difference (of double or brightest multiple) 0,8
note (category: double and multiple data): CPM with HR 7594.

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

position, motion, parallax:

position (J2000) RA: 19h 54min 37,659sec DEC: -8 13' 38,54'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0004 arcsec/a DEC: -0,03 arcsec/a source: 25
radial velocity -6 km/s source: 25
trigonometric parallax 0,01 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 32,67 latitude: -17,76
GCI unit vector (J2000) X: 0,474628 Y: -0,868476 Z: -0,143102

magnitude:

visual 5,71 (observed) source: 25
photovisual 5,9 source: 16
photographic 5,6 source: 2

spectral information:

spectral class B3 source: 96
Morgan-Keenan B7Vn source: 25
B-magnitude 5,63 0,05 B-V-magnitude -0,08
U-magnitude 5,15 0,05 U-B-magnitude -0,48

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 36 arcsec
magnitude difference between brightest and second brightest component 0,78
position angle 170

component magnitude spectral class catalogue(s)/name(s)
A 5,71 B3 57 Aql, HR 7593, HD 188293, SAO 143898
B 6,49 B7 57 Aql, HR 7594, HD 188294, SAO 143899

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
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: 19h 51min 55,256sec DEC: -8 21' 32,32'' 0,014 arcsec
position (J2000) RA: 19h 54min 37,647sec DEC: -8 13' 38,07''
proper motion J1950 (FK4) RA: 0,0004 arcsec/a DEC: -0,024 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0006 arcsec/a DEC: -0,025 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B3
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: 27562
Durchmusterung BD-08 5154
Boss General Catalogue 27562
Henry Draper Catalogue 188293

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

position and proper motion:

position (J2000) RA: 19h 54,6min DEC: -8 14'
proper motion (J2000) RA: 0,015 arcsec/a DEC: -0,03 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
- 1833 40 172 36'' 5,71 6,49 B7Vn B8V STF2594
1968 170 -

discoverer information:

discoverer code discoverer reference
STF2594 Struve, F.G.W. -

notes:

note 57 Aql. B is BD-08@5155. Proper motion of B +014 -025. Both components are spectroscopic binaries.