HR 8040
catalogues and names
| catalogues and names | HR 8040, HD 199955, SAO 33034, BD +49 3426, WDS 20585+5028A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 20h 58min 30.1sec | DEC: +50° 27' 44'' | ||
| position (B1900) | RA: 20h 55min 17.8sec | DEC: +50° 4' 25'' | ||
| proper motion (J2000) | RA: 0.013 arcsec/a | DEC: 0.01 arcsec/a | ||
| radial velocity | -21 km/s note: variable radial velocity |
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| trigonometric parallax | 0.008 arcsec | |||
| galactic coordinates | longitude: 90.11° | latitude: 3.06° | ||
| note (category: dynamical parallaxes): | 0.003". |
magnitude
| visual magnitude | 5.61 (V on UBV Johnson system) |
spectral / color information
| spectral class | B5Vn |
| B-V-magnitude | -0.15 |
| U-B-magnitude | -0.51 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 1.8 arcsec |
| mag difference (of double or brightest multiple) | 0.9 |
| component ID | AB |
| note (category: double and multiple data): | AB binary. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 20h 58min 30.037sec | DEC: +50° 27' 43.13'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0.0003 arcsec/a | DEC: 0.005 arcsec/a | source: 25 | |
| radial velocity | -21 km/s | source: 25 | ||
| trigonometric parallax | 0.008 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 90.12° | latitude: 3.06° | ||
magnitude:
| visual | 5.61 (observed) | source: 25 |
| photovisual | 5.5 | source: 2 |
| photographic | 5.4 | source: 16 |
spectral information:
| spectral class | B8 | source: 96 | |
| Morgan-Keenan | B5Vn | source: 25 | |
| B-magnitude | 5.46 ±0.05 | B-V-magnitude | -0.15 |
| U-magnitude | 4.95 ±0.05 | U-B-magnitude | -0.51 |
double/multiple star system information:
| separation between brightest and second brightest component | 1.9 arcsec |
| magnitude difference between brightest and second brightest component | 1.1 |
| position angle | 26 ° |
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: 20h 56min 53.857sec | DEC: +50° 16' 1.72'' | ±0.021 arcsec |
| position (J2000) | RA: 20h 58min 30.104sec | DEC: +50° 27' 43.65'' | |
| proper motion B1950 (FK4) | RA: 0.001 arcsec/a | DEC: 0.013 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0014 arcsec/a | DEC: 0.01 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 | B8 |
| 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: 29291 |
| Durchmusterung | BD+49 3426 |
| Boss General Catalogue | 29291 |
| Henry Draper Catalogue | 199955 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 20h 58.5min | DEC: +50° 28' |
| proper motion (J2000) | RA: 0.008 arcsec/a | DEC: 0.006 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 | 1831 | 89 | 36° | 1.9'' | 5.9 | 7 | B5Vn | STF2741 |
| 1992 | 26° | - | ||||||
| AC | 1879 | 3 | 356° | 139.4'' | 5.5 | 10.5 | - | STF2741 |
discoverer information:
| discoverer code | discoverer | reference |
| STF2741 | Struve, F.G.W. | - |