HR 7809
| catalogues and names |
| The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) |
| SKY2000 - Master Star Catalog |
| Smithsonian Astrophysical Observatory Star Catalog |
catalogues and names
| catalogues and names | HR 7809, HD 194454, SAO 144412, BD -3 4888 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 20h 25min 42.5sec | DEC: -2° 48' 1'' | ||
| position (B1900) | RA: 20h 20min 29.5sec | DEC: -3° 7' 29'' | ||
| proper motion (J2000) | RA: -0.007 arcsec/a | DEC: -0.03 arcsec/a | ||
| radial velocity | 24 km/s note: suspected variable radial velocity |
|||
| galactic coordinates | longitude: 41.54° | latitude: -22.19° | ||
magnitude
| visual magnitude | 6.11 (V on UBV Johnson system) |
spectral / color information
| spectral class | gK1 |
| B-V-magnitude | 1.19 |
| U-B-magnitude | 1.19 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 20h 25min 42.539sec | DEC: -2° 48' 1.51'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0001 arcsec/a | DEC: -0.041 arcsec/a | source: 25 | |
| radial velocity | 24 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 41.55° | latitude: -22.19° | ||
magnitude:
| visual | 6.11 (observed) | source: 25 |
| photovisual | 6 | source: 16 |
| photographic | 7.1 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | gK1 | source: 25 | |
| B-magnitude | 7.3 ±0.05 | B-V-magnitude | 1.19 |
| U-magnitude | 8.49 ±0.05 | U-B-magnitude | 1.19 |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
| 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 (B1950) | RA: 20h 23min 6.023sec | DEC: -2° 57' 49.59'' | ±0.021 arcsec |
| position (J2000) | RA: 20h 25min 42.498sec | DEC: -2° 48' 0.57'' | |
| proper motion B1950 (FK4) | RA: -0.0007 arcsec/a | DEC: -0.028 arcsec/a | ±0.004 arcsec/a in RA ±0.004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0005 arcsec/a | DEC: -0.031 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.1 (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. |
catalogues
| source catalogue | GC, catalogue number: 28408 |
| Durchmusterung | BD-03 4888 |
| Boss General Catalogue | 28408 |
| Henry Draper Catalogue | 194454 |