15 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 15 Aql, HR 7225, HD 177463, SAO 142996, WDS 19050-0402A
constellation Aquila

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: 19h 4min 57,6sec DEC: -4 1' 53''
position (J1900) RA: 18h 59min 40,9sec DEC: -4 10' 49''
proper motion (J2000) RA: 0,02 arcsec/a DEC: -0,027 arcsec/a
radial velocity -18 km/s
note: suspected variable radial velocity
rotational velocity =<25 km/s (uncertain) (variable)
trigonometric parallax 0,002 arcsec

magnitude

visual magnitude 5,42
(V on UBV Johnson system)

spectral / color information

spectral class K1III
B-V-magnitude 1,12
U-B-magnitude 1,01
R-I-magnitude 0,61

double/multiple star system information

separation 38,5 arcsec
mag difference (of double or brightest multiple) 1,6
note (category: double and multiple data): Companion gK4, optical.

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

position, motion, parallax:

position (J2000) RA: 19h 4min 57,685sec DEC: -4 1' 53,24'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0019 arcsec/a DEC: -0,027 arcsec/a source: 25
radial velocity -18 km/s source: 25
trigonometric parallax 0,002 - source: 25
galactic coord. (B1950) longitude: 30,88 latitude: -4,84
GCI unit vector (J2000) X: 0,278976 Y: -0,957721 Z: -0,070304

magnitude:

visual 5,42 (observed) source: 25
photovisual 5,3 source: 16
photographic 6,5 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K1III source: 25
B-magnitude 6,54 0,05 B-V-magnitude 1,12
U-magnitude 7,55 0,05 U-B-magnitude 1,01

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 38,8 arcsec
magnitude difference between brightest and second brightest component 1,8
position angle 209

component magnitude spectral class catalogue(s)/name(s)
A 5,42 K0 15 Aql, HR 7225, HD 177463, SAO 142996
B 7,017 K0

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 2min 19,217sec DEC: -4 6' 26,7'' 0,014 arcsec
position (J2000) RA: 19h 4min 57,64sec DEC: -4 1' 53,31''
proper motion J1950 (FK4) RA: 0,0011 arcsec/a DEC: -0,027 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0013 arcsec/a DEC: -0,027 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K0
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: 26237
Durchmusterung BD-04 4684
Boss General Catalogue 26237
Henry Draper Catalogue 177463

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

position and proper motion:

position (J2000) RA: 19h 5min DEC: -4 2'
proper motion (J2000) RA: 0,029 arcsec/a DEC: -0,027 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
- 1823 30 207 35,6'' 5,42 7,2 K0IV SHJ 286
1976 209 38,8''

discoverer information:

discoverer code discoverer reference
SHJ 286 South & Herschel -

notes:

note 15 Aql. B is BD-04@4683. Proper motion of B +034 -036.