HR 728
catalogues and names
| catalogues and names | HR 728, HD 15524, SAO 75407, BD +24 358, FK5: 2171, WDS 02305+2514A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 30min 32.4sec | DEC: +25° 14' 6'' | ||
| position (B1900) | RA: 2h 24min 47sec | DEC: +24° 47' 31'' | ||
| proper motion (J2000) | RA: 0.066 arcsec/a | DEC: -0.078 arcsec/a | ||
| radial velocity | -11 km/s note: variable radial velocity |
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| rotational velocity | 50 km/s (uncertain) (variable) | |||
| dynamical parallax | 0.022 arcsec | |||
| galactic coordinates | longitude: 149.62° | latitude: -32.45° | ||
magnitude
| visual magnitude | 5.92 (V on UBV Johnson system) |
spectral / color information
| spectral class | F6IV |
| B-V-magnitude | 0.41 |
| U-B-magnitude | 0.06 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 113.1 arcsec |
| mag difference (of double or brightest multiple) | 4.5 |
| component ID | AC |
| note (category: double and multiple data): | ADS 1904AB binary; B, 11v. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 30min 32.359sec | DEC: +25° 14' 6.03'' | ±0.19 arcsec | source: 33 |
| proper motion (J2000) | RA: 0.0049 arcsec/a | DEC: -0.078 arcsec/a | source: 25 | |
| radial velocity | -11 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 149.63° | latitude: -32.45° | ||
magnitude:
| visual | 5.92 (observed) | source: 25 |
| photovisual | 5.9 | source: 2 |
| photographic | 6.3 | source: 2 |
spectral information:
| spectral class | F5 | source: 96 | |
| Morgan-Keenan | F6IV | source: 25 | |
| B-magnitude | 6.33 ±0.05 | B-V-magnitude | 0.41 |
| U-magnitude | 6.39 ±0.05 | U-B-magnitude | 0.06 |
double/multiple star system information:
| separation between brightest and second brightest component | 12.4 arcsec |
| magnitude difference between brightest and second brightest component | 4.5 |
| position angle | 182 ° |
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 | |
| 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 | |
| 33 | Hipparcos Main Input Catalogue Version 2 |
| Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993 | |
| 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 27min 39.386sec | DEC: +25° 0' 52.3'' | ±0.017 arcsec |
| position (J2000) | RA: 2h 30min 32.345sec | DEC: +25° 14' 5.67'' | |
| proper motion B1950 (FK4) | RA: 0.0047 arcsec/a | DEC: -0.076 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0047 arcsec/a | DEC: -0.081 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: 3001 |
| Durchmusterung | BD+24 358 |
| Boss General Catalogue | 3001 |
| Henry Draper Catalogue | 15524 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 30.5min | DEC: +25° 14' |
| proper motion (J2000) | RA: 0.064 arcsec/a | DEC: -0.082 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 | 13 | 182° | 12.4'' | 5.9 | 10.4 | F6IV | STF 271 |
| AC | 1911 | 4 | 34° | 112.5'' | 5.9 | 11.8 | - | STF 271 |
| 1959 | - | 113.1'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF 271 | Struve, F.G.W. | - |