HR 1987
catalogues and names
| catalogues and names | HR 1987, HD 38527, SAO 113124, BD +9 954, FK5: 2432, WDS 05469+0931 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 46min 52.1sec | DEC: +9° 31' 20'' | ||
| position (B1900) | RA: 5h 41min 22.7sec | DEC: +9° 29' 8'' | ||
| proper motion (J2000) | RA: -0.034 arcsec/a | DEC: -0.065 arcsec/a | ||
| radial velocity | -26 km/s | |||
| galactic coordinates | longitude: 196.9° | latitude: -9.71° | ||
magnitude
| visual magnitude | 5.79 (V on UBV Johnson system) |
spectral / color information
| spectral class | G8III |
| B-V-magnitude | 0.88 |
| U-B-magnitude | 0.58 |
double/multiple star system information
| separation | 17.2 arcsec |
| mag difference (of double or brightest multiple) | 5.9 |
| note (category: double and multiple data): | Optical. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 46min 52.108sec | DEC: +9° 31' 19.8'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0026 arcsec/a | DEC: -0.075 arcsec/a | source: 25 | |
| radial velocity | -26 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 196.9° | latitude: -9.71° | ||
magnitude:
| visual | 5.79 (observed) | source: 25 |
| photovisual | 5.9 | source: 2 |
| photographic | 6.5 | source: 16 |
spectral information:
| spectral class | G5 | source: 96 | |
| Morgan-Keenan | G8III | source: 25 | |
| B-magnitude | 6.67 ±0.05 | B-V-magnitude | 0.88 |
| U-magnitude | 7.25 ±0.05 | U-B-magnitude | 0.58 |
double/multiple star system information:
| separation between brightest and second brightest component | 17.2 arcsec |
| magnitude difference between brightest and second brightest component | 6.1 |
| position angle | 288 ° |
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: 5h 44min 7.333sec | DEC: +9° 30' 20.23'' | ±0.023 arcsec |
| position (J2000) | RA: 5h 46min 52.128sec | DEC: +9° 31' 20.4'' | |
| proper motion B1950 (FK4) | RA: -0.0025 arcsec/a | DEC: -0.064 arcsec/a | ±0.005 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0024 arcsec/a | DEC: -0.064 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 | G5 |
| 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: 7228 |
| Durchmusterung | BD+09 954 |
| Boss General Catalogue | 7228 |
| Henry Draper Catalogue | 38527 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 46.9min | DEC: +9° 31' |
| proper motion (J2000) | RA: -0.034 arcsec/a | DEC: -0.066 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 |
| - | 1910 | 4 | 274° | 16.3'' | 5.79 | 11.9 | G8III | J 251 |
| 1957 | 288° | 17.2'' |
discoverer information:
| discoverer code | discoverer | reference |
| J 251 | Jonckheere, R. | - |
notes:
| note | Proper motion of B -006 -031. |