HR 6751
catalogues and names
| catalogues and names | HR 6751, HD 165259, SAO 257571, CP -73 1888, WDS 18126-7340 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 18h 12min 34.5sec | DEC: -73° 40' 18'' | ||
| position (B1900) | RA: 17h 59min 52sec | DEC: -73° 40' 50'' | ||
| proper motion (J2000) | RA: -0.053 arcsec/a | DEC: -0.231 arcsec/a | ||
| radial velocity | 13 km/s | |||
| trigonometric parallax | 0.031 arcsec | |||
| galactic coordinates | longitude: 320.49° | latitude: -23.29° | ||
magnitude
| visual magnitude | 5.85 (V on UBV Johnson system) |
spectral / color information
| spectral class | F5V |
| B-V-magnitude | 0.46 |
| U-B-magnitude | 0.05 |
double/multiple star system information
| separation | 2.8 arcsec |
| mag difference (of double or brightest multiple) | 3 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 18h 12min 34.037sec | DEC: -73° 40' 21.03'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0158 arcsec/a | DEC: -0.26 arcsec/a | source: 25 | |
| radial velocity | 13 km/s | source: 25 | ||
| trigonometric parallax | 0.031 arcsec | ±0.003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 320.5° | latitude: -23.29° | ||
magnitude:
| visual | 5.85 (observed) | source: 25 |
| photovisual | 5.9 | source: 16 |
spectral information:
| spectral class | F5 | source: 96 | |
| Morgan-Keenan | F5V | source: 25 | |
| B-magnitude | 6.31 ±0.05 | B-V-magnitude | 0.46 |
| U-magnitude | 6.36 ±0.05 | U-B-magnitude | 0.05 |
double/multiple star system information:
| separation between brightest and second brightest component | 2.8 arcsec |
| magnitude difference between brightest and second brightest component | 3 |
| position angle | 252 ° |
sources:
| 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: 18h 6min 13.389sec | DEC: -73° 40' 47.73'' | ±0.064 arcsec |
| position (J2000) | RA: 18h 12min 34.496sec | DEC: -73° 40' 18.2'' | |
| proper motion B1950 (FK4) | RA: -0.011 arcsec/a | DEC: -0.229 arcsec/a | ±0.013 arcsec/a in RA ±0.011 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0126 arcsec/a | DEC: -0.231 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F5 |
| 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: 24731 |
| Durchmusterung | CP-73 1888 |
| Boss General Catalogue | 24731 |
| Henry Draper Catalogue | 165259 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 18h 12.6min | DEC: -73° 40' |
| proper motion (J2000) | RA: -0.081 arcsec/a | DEC: -0.26 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 | 6 | 232° | 2.5'' | 5.9 | 8.9 | F5V | HDO 284 |
| 1974 | 252° | 2.8'' |
discoverer information:
| discoverer code | discoverer | reference |
| HDO 284 | - | - |