HR 2174
catalogues and names
| catalogues and names | HR 2174, HD 42111, SAO 113507, BD +2 1139, WDS 06090+0230A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 6h 8min 57.9sec | DEC: +2° 29' 58'' | ||
| position (B1900) | RA: 6h 3min 44.7sec | DEC: +2° 30' 56'' | ||
| proper motion (J2000) | RA: 0.004 arcsec/a | DEC: -0.02 arcsec/a | ||
| radial velocity | 34 km/s | |||
| rotational velocity | 250 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 205.81° | latitude: -8.28° | ||
magnitude
| visual magnitude | 5.73 (V on UBV Johnson system) |
spectral / color information
| spectral class | A3Vn |
| B-V-magnitude | 0.07 |
| U-B-magnitude | 0.06 |
variability information
| note (category: variability): | ADS 4749A, spectrum variable. Sometimes shows shell features. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 29.3 arcsec |
| mag difference (of double or brightest multiple) | 1.2 |
| component ID | AB |
| note (category: double and multiple data): | AB CPM. B is 6.94V, +0.04(B-V), -0.02(U-B), A0V, vsini 120k/s. Component C, 8.9v at 118". HD erroneously assigned the preceding number, HD 42092, to the fainter following component of ADS 4749. Consequently the data for the two primary components are sometimes interchanged. vsini for component A is 250k/s. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 6h 8min 57.905sec | DEC: +2° 29' 59.04'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0002 arcsec/a | DEC: -0.01 arcsec/a | source: 25 | |
| radial velocity | 34 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 205.81° | latitude: -8.28° | ||
magnitude:
| visual | 5.73 (observed) | source: 25 |
| photovisual | 5.6 | source: 2 |
| photographic | 5.4 | source: 16 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | A3Vn | source: 25 | |
| B-magnitude | 5.8 ±0.05 | B-V-magnitude | 0.07 |
| U-magnitude | 5.86 ±0.05 | U-B-magnitude | 0.06 |
double/multiple star system information:
| separation between brightest and second brightest component | 29.2 arcsec |
| magnitude difference between brightest and second brightest component | 1.19 |
| position angle | 114 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5.73 | A0 | HR 2174, HD 42111, SAO 113507 |
| B | 6.92 | A0 |
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: 6h 6min 21.241sec | DEC: +2° 30' 32.76'' | ±0.019 arcsec |
| position (J2000) | RA: 6h 8min 57.915sec | DEC: +2° 29' 58.29'' | |
| proper motion B1950 (FK4) | RA: 0 arcsec/a | DEC: -0.02 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0002 arcsec/a | DEC: -0.02 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A0 |
| 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: 7817 |
| Durchmusterung | BD+02 1139 |
| Boss General Catalogue | 7817 |
| Henry Draper Catalogue | 42111 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 6h 9min | DEC: +2° 30' |
| proper motion (J2000) | RA: -0.001 arcsec/a | DEC: -0.017 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 | 1828 | 25 | 114° | 29.2'' | 5.73 | 6.92 | A3Vn A0V | STF 855 |
| AC | 1915 | 2 | 106° | 118.1'' | 5.7 | 8.9 | - | STF 855 |
| BC | 1923 | 1 | 104° | 90.6'' | - | - | - | STF 855 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 855 | Struve, F.G.W. | - |
notes:
| note | B is BD+02@1140. |