HR 318
catalogues and names
| catalogues and names | HR 318, HD 6540, SAO 22021, BD +52 262, WDS 01072+5330A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 1h 7min 9.5sec | DEC: +53° 29' 54'' | ||
| position (B1900) | RA: 1h 1min 12.4sec | DEC: +52° 57' 48'' | ||
| proper motion (J2000) | RA: 0.023 arcsec/a | DEC: -0.001 arcsec/a | ||
| radial velocity | 7 km/s | |||
| galactic coordinates | longitude: 125.3° | latitude: -9.3° | ||
magnitude
| visual magnitude | 6.38 (HR magnitude reduced to the UBV system) |
spectral / color information
| spectral class | K2III |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 21.7 arcsec |
| mag difference (of double or brightest multiple) | 4 |
| component ID | AB |
| note (category: double and multiple data): | AB optical. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 1h 7min 9.514sec | DEC: +53° 29' 53.19'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0029 arcsec/a | DEC: -0.008 arcsec/a | source: 25 | |
| radial velocity | 7 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 125.31° | latitude: -9.3° | ||
magnitude:
| visual | 6.29 (observed) | source: 25 |
| photovisual | 6.5 | source: 2 |
| photographic | 7.4 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K2III | source: 25 | |
| B-magnitude | 7.84 ±0.05 | B-V-magnitude | 1.55 |
| U-magnitude | 9.49 ±0.05 | U-B-magnitude | 1.65 |
double/multiple star system information:
| separation between brightest and second brightest component | 20.8 arcsec |
| magnitude difference between brightest and second brightest component | 3.6 |
| position angle | 75 ° |
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 | |
| 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: 1h 4min 10.24sec | DEC: +53° 13' 52.85'' | ±0.036 arcsec |
| position (J2000) | RA: 1h 7min 9.517sec | DEC: +53° 29' 53.94'' | |
| proper motion B1950 (FK4) | RA: 0.0025 arcsec/a | DEC: 0.004 arcsec/a | ±0.007 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0026 arcsec/a | DEC: -0.001 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.5 (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. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 1343 |
| Durchmusterung | BD+52 262 |
| Boss General Catalogue | 1343 |
| Henry Draper Catalogue | 6540 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 1h 7.2min | DEC: +53° 30' |
| proper motion (J2000) | RA: 0.037 arcsec/a | DEC: -0.005 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 | 1783 | 9 | 77° | 24'' | 6.5 | 10.1 | K2III | H 66 |
| 1991 | 75° | 20.8'' | ||||||
| AC | 1880 | 3 | 122° | 199.1'' | 6.5 | 10.9 | - | H 66 |
| 1959 | - | 197.4'' |
discoverer information:
| discoverer code | discoverer | reference |
| H 66 | Herschel, W. | - |
notes:
| note | H IV 66. |