n Aquilae
catalogues and names
| catalogues and names | n Aql, NSV 12021, 32 Aql, HR 7387, HD 182835, SAO 124628, BD +0 4206, WDS 19265+0020 |
| constellation | Aquila |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 19h 26min 31.1sec | DEC: +0° 20' 19'' | ||
| position (B1900) | RA: 19h 21min 24.2sec | DEC: +0° 8' 21'' | ||
| proper motion (J2000) | RA: 0 arcsec/a | DEC: 0.001 arcsec/a | ||
| radial velocity | -1 km/s | |||
| rotational velocity | 13 km/s (uncertain) (variable) | |||
| trigonometric parallax | -0.008 arcsec | |||
| galactic coordinates | longitude: 37.26° | latitude: -7.64° | ||
magnitude
| visual magnitude | 4.66 (V on UBV Johnson system) |
spectral / color information
| spectral class | F2Ib |
| B-V-magnitude | 0.6 |
| U-B-magnitude | 0.42 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: colors): | V magnitudes scatter from 4.64 to 4.72, B-V from +0.58 to +0.61, U-B from +0.33 to +0.59. |
variability information
| variable star identification | 12021 |
double/multiple star system information
| separation | 201 arcsec |
| mag difference (of double or brightest multiple) | 4.2 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Colors of B are +0.31(B-V), +0.16(U-B). |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 19h 26min 31.088sec | DEC: +0° 20' 18.99'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0001 arcsec/a | DEC: -0.003 arcsec/a | source: 25 | |
| radial velocity | -1 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 37.26° | latitude: -7.64° | ||
magnitude:
| visual | 4.66 (observed) | source: 25 |
| photovisual | 4.9 | source: 2 |
| photographic | 5.2 | source: 16 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | F2Ib | source: 25 | |
| B-magnitude | 5.26 ±0.05 | B-V-magnitude | 0.6 |
| U-magnitude | 5.68 ±0.05 | U-B-magnitude | 0.42 |
double/multiple star system information:
| separation between brightest and second brightest component | 201 arcsec |
| magnitude difference between brightest and second brightest component | 4.4 |
| position angle | 288 ° |
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: 19h 23min 57.612sec | DEC: +0° 14' 14.84'' | ±0.018 arcsec |
| position (J2000) | RA: 19h 26min 31.082sec | DEC: +0° 20' 19.14'' | |
| proper motion B1950 (FK4) | RA: -0.0002 arcsec/a | DEC: 0.003 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0 arcsec/a | DEC: 0.001 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 26838 |
| Durchmusterung | BD+00 4206 |
| Boss General Catalogue | 26838 |
| Henry Draper Catalogue | 182835 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 19h 26.5min | DEC: +0° 20' |
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: 0.003 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 |
| - | 1901 | 2 | 288° | 201'' | 4.66 | 9.1 | F2Ib | BU 1469 |
discoverer information:
| discoverer code | discoverer | reference |
| BU 1469 | Burnham, S.W. | - |
notes:
| note | Nu Aql. B is BD+00@4204. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 19h 23min 57.6sec | DEC: +0° 14' 15'' |
variability informations:
| magnitute at max. brightness | 4.62 |
| magnitute at min. brightness | 4.69 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | F2 |
references
| to a study | 660820D (designation: BS 7387) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |