NSV 12490
catalogues and names
| catalogues and names | NSV 12490, HR 7569, HD 187923, SAO 105348, BD +11 4019, WDS 19521+1138 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 19h 52min 3.5sec | DEC: +11° 37' 44'' | ||
| position (B1900) | RA: 19h 47min 22.5sec | DEC: +11° 22' 52'' | ||
| proper motion (J2000) | RA: -0.335 arcsec/a | DEC: -0.32 arcsec/a | ||
| radial velocity | -17 km/s note: variable radial velocity |
|||
| rotational velocity | =<10 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.022 arcsec | |||
| galactic coordinates | longitude: 50.33° | latitude: -7.82° | ||
magnitude
| visual magnitude | 6.13 (V on UBV Johnson system) |
spectral / color information
| spectral class | G0V |
| B-V-magnitude | 0.65 |
| U-B-magnitude | 0.13 |
variability information
| variable star identification | 12490 |
double/multiple star system information
| separation | 90.5 arcsec |
| mag difference (of double or brightest multiple) | 5.5 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 19h 52min 3.447sec | DEC: +11° 37' 41.81'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0232 arcsec/a | DEC: -0.338 arcsec/a | source: 25 | |
| radial velocity | -17 km/s | source: 25 | ||
| trigonometric parallax | 0.022 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 50.34° | latitude: -7.82° | ||
magnitude:
| visual | 6.13 (observed) | source: 25 |
| photovisual | 6.2 | source: 2 |
| photographic | 6.7 | source: 16 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G0V | source: 25 | |
| B-magnitude | 6.78 ±0.05 | B-V-magnitude | 0.65 |
| U-magnitude | 6.91 ±0.05 | U-B-magnitude | 0.13 |
double/multiple star system information:
| separation between brightest and second brightest component | 90.5 arcsec |
| magnitude difference between brightest and second brightest component | 5.6 |
| position angle | 156 ° |
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 49min 42.959sec | DEC: +11° 30' 13.29'' | ±0.04 arcsec |
| position (J2000) | RA: 19h 52min 3.494sec | DEC: +11° 37' 43.55'' | |
| proper motion B1950 (FK4) | RA: -0.023 arcsec/a | DEC: -0.316 arcsec/a | ±0.007 arcsec/a in RA ±0.006 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0228 arcsec/a | DEC: -0.32 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | G0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 27510 |
| Durchmusterung | BD+11 4019 |
| Boss General Catalogue | 27510 |
| Henry Draper Catalogue | 187923 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 19h 52.1min | DEC: +11° 38' |
| proper motion (J2000) | RA: -0.343 arcsec/a | DEC: -0.336 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 |
| - | 1909 | 2 | 160° | 93.9'' | 6.13 | 11.7 | G0V | BUP 200 |
| 1924 | 156° | 90.5'' |
discoverer information:
| discoverer code | discoverer | reference |
| BUP 200 | - | - |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 19h 49min 43sec | DEC: +11° 30' 13'' |
variability informations:
| magnitute at max. brightness | 5.78 |
| magnitute at min. brightness | 6.16 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | G2 |
references
| to a study | 730774D (designation: 16906) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |