HR 748
catalogues and names
| catalogues and names | HR 748, HD 16028, SAO 55684, BD +36 519, WDS 02356+3719A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 35min 38.8sec | DEC: +37° 18' 44'' | ||
| position (B1900) | RA: 2h 29min 28.9sec | DEC: +36° 52' 29'' | ||
| proper motion (J2000) | RA: 0.004 arcsec/a | DEC: -0.009 arcsec/a | ||
| radial velocity | -6 km/s | |||
| galactic coordinates | longitude: 144.92° | latitude: -21.07° | ||
magnitude
| visual magnitude | 5.71 (V on UBV Johnson system) |
spectral / color information
| spectral class | K3III |
| B-V-magnitude | 1.39 |
| 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 | 18.3 arcsec |
| mag difference (of double or brightest multiple) | 5.2 |
| component ID | AB |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 35min 38.768sec | DEC: +37° 18' 44.33'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0001 arcsec/a | DEC: -0.012 arcsec/a | source: 25 | |
| radial velocity | -6 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 144.92° | latitude: -21.07° | ||
magnitude:
| visual | 5.71 (observed) | source: 25 |
| photovisual | 5.9 | source: 2 |
| photographic | 7 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K3III | source: 25 | |
| B-magnitude | 7.1 ±0.05 | B-V-magnitude | 1.39 |
double/multiple star system information:
| separation between brightest and second brightest component | 18.3 arcsec |
| magnitude difference between brightest and second brightest component | 5 |
| position angle | 71 ° |
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 32min 33.414sec | DEC: +37° 5' 41.02'' | ±0.021 arcsec |
| position (J2000) | RA: 2h 35min 38.773sec | DEC: +37° 18' 44.49'' | |
| proper motion B1950 (FK4) | RA: 0.0003 arcsec/a | DEC: -0.006 arcsec/a | ±0.006 arcsec/a in RA ±0.004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0003 arcsec/a | DEC: -0.009 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 | 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: 3100 |
| Durchmusterung | BD+36 519 |
| Boss General Catalogue | 3100 |
| Henry Draper Catalogue | 16028 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 35.6min | DEC: +37° 19' |
| proper motion (J2000) | RA: 0.005 arcsec/a | DEC: -0.01 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 | 1831 | 11 | 71° | 17'' | 5.9 | 10.9 | K3III | STF 279 |
| 1962 | - | 18.3'' | ||||||
| AC | 1909 | 2 | 207° | 22.9'' | 5.9 | 11.7 | - | STF 279 |
| 1933 | - | 45.6'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF 279 | Struve, F.G.W. | - |