11 Aquilae
catalogues and names
| catalogues and names | NSV 11618, 11 Aql, HR 7172, HD 176303, SAO 104308, BD +13 3841, WDS 18591+1338A |
| constellation | Aquila |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 18h 59min 5.7sec | DEC: +13° 37' 21'' | ||
| position (B1900) | RA: 18h 54min 29.4sec | DEC: +13° 29' 21'' | ||
| proper motion (J2000) | RA: 0.014 arcsec/a | DEC: -0.123 arcsec/a | ||
| radial velocity | 16 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 26 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.039 arcsec | |||
| galactic coordinates | longitude: 45.94° | latitude: 4.5° | ||
magnitude
| visual magnitude | 5.23 (V on UBV Johnson system) |
spectral / color information
| spectral class | F8V |
| B-V-magnitude | 0.53 |
| U-B-magnitude | 0.07 |
| R-I-magnitude |
variability information
| variable star identification | 11618 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 17.8 arcsec |
| mag difference (of double or brightest multiple) | 4.3 |
| component ID | AB |
| note (category: double and multiple data): | Both companions optical. |
miscellaneous information
| note (category: group membership): | UMa stream. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 18h 59min 5.714sec | DEC: +13° 37' 20.17'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0.0004 arcsec/a | DEC: -0.124 arcsec/a | source: 25 | |
| radial velocity | 16 km/s | source: 25 | ||
| trigonometric parallax | 0.039 arcsec | ±0.004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 45.95° | latitude: 4.5° | ||
magnitude:
| visual | 5.23 (observed) | source: 25 |
| photovisual | 5.4 | source: 2 |
| photographic | 5.8 | source: 16 |
spectral information:
| spectral class | F5 | source: 96 | |
| Morgan-Keenan | F8V | source: 25 | |
| B-magnitude | 5.76 ±0.05 | B-V-magnitude | 0.53 |
| U-magnitude | 5.83 ±0.05 | U-B-magnitude | 0.07 |
double/multiple star system information:
| separation between brightest and second brightest component | 19 arcsec |
| magnitude difference between brightest and second brightest component | 4.31 |
| position angle | 296 ° |
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 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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 (B1950) | RA: 18h 56min 47.531sec | DEC: +13° 33' 15.97'' | ±0.019 arcsec |
| position (J2000) | RA: 18h 59min 5.724sec | DEC: +13° 37' 20.55'' | |
| proper motion B1950 (FK4) | RA: 0.0008 arcsec/a | DEC: -0.122 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.001 arcsec/a | DEC: -0.123 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F5 |
| 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: 26075 |
| Durchmusterung | BD+13 3841 |
| Boss General Catalogue | 26075 |
| Henry Draper Catalogue | 176303 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 18h 59.1min | DEC: +13° 38' |
| proper motion (J2000) | RA: 0.009 arcsec/a | DEC: -0.125 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 | 1820 | 49 | 236° | 20.1'' | 5.26 | 9.57 | F6IV | STF2424 |
| 1988 | 296° | 19'' | ||||||
| AC | 1911 | 3 | 262° | 78.5'' | 5.4 | 12.4 | - | STF2424 |
| 1988 | 268° | 78.3'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF2424 | Struve, F.G.W. | - |
notes:
| note | 11 Aql. Proper motion of B +009 -012. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 18h 56min 47.5sec | DEC: +13° 33' 16'' |
variability informations:
| magnitute at max. brightness | 5.22 |
| magnitute at min. brightness | 5.3 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | F8 |
references
| to a study | 2521D (designation: 546) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |