HR 787
catalogues and names
| catalogues and names | HR 787, HD 16735, SAO 23556, BD +52 616, WDS 02430+5332 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 42min 59.7sec | DEC: +53° 31' 34'' | ||
| position (B1900) | RA: 2h 35min 56.5sec | DEC: +53° 5' 59'' | ||
| proper motion (J2000) | RA: 0.068 arcsec/a | DEC: -0.03 arcsec/a | ||
| radial velocity | -12 km/s note: variable radial velocity |
|||
| galactic coordinates | longitude: 139.16° | latitude: -5.79° | ||
magnitude
| visual magnitude | 5.84 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0II-III |
| B-V-magnitude | 1.12 |
double/multiple star system information
| separation | 12.4 arcsec |
| mag difference (of double or brightest multiple) | 9 |
| note (category: double and multiple data): | Optical. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 42min 59.54sec | DEC: +53° 31' 33.97'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0068 arcsec/a | DEC: -0.032 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 139.17° | latitude: -5.79° | ||
magnitude:
| visual | 5.84 (observed) | source: 25 |
| photovisual | 6.1 | source: 2 |
| photographic | 7.1 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K0II-III | source: 25 | |
| B-magnitude | 6.96 ±0.05 | B-V-magnitude | 1.12 |
| U-magnitude | 8.06 ±0.02 | U-B-magnitude | 1.08 |
double/multiple star system information:
| separation between brightest and second brightest component | 12.4 arcsec |
| magnitude difference between brightest and second brightest component | 9.3 |
| position angle | 29 ° |
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: 2h 39min 27.297sec | DEC: +53° 18' 51.46'' | ±0.03 arcsec |
| position (J2000) | RA: 2h 42min 59.66sec | DEC: +53° 31' 34.05'' | |
| proper motion B1950 (FK4) | RA: 0.0077 arcsec/a | DEC: -0.026 arcsec/a | ±0.007 arcsec/a in RA ±0.004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0077 arcsec/a | DEC: -0.03 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. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 3254 |
| Durchmusterung | BD+52 616 |
| Boss General Catalogue | 3254 |
| Henry Draper Catalogue | 16735 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 43min | DEC: +53° 32' |
| proper motion (J2000) | RA: 0.057 arcsec/a | DEC: -0.034 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 |
| - | 1899 | 3 | 43° | 12.8'' | 5.84 | 15.1 | G8III | ES 8 |
| 1935 | 29° | 12.4'' |
discoverer information:
| discoverer code | discoverer | reference |
| ES 8 | Espin, T.E. | - |