i1Normae
| catalogues and names | i1Nor, HR 5961, HD 143474, SAO 243279, WDS 16035-5747A |
| constellation | Norma |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 3min 31,9sec | DEC: -57° 46' 31'' |
| position (J1900) | RA: 15h 55min 23,7sec | DEC: -57° 29' 36'' |
| proper motion (J2000) | RA: -0,124 arcsec/a | DEC: -0,085 arcsec/a |
| radial velocity | -14 km/s note: variable radial velocity |
|
| rotational velocity | 139 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,023 arcsec | |
| note (category: dynamical parallaxes): | 0.026". |
magnitude
| visual magnitude | 4,63 (V on UBV Johnson system) |
spectral / color information
| spectral class | A7IV |
| B-V-magnitude | 0,24 |
| U-B-magnitude | 0,09 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0,5 arcsec |
| mag difference (of double or brightest multiple) | 0,2 |
| component ID | AB |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | AB 5.3 A5V, 5.5 A6V, 26.93y, a = 0.366". C, 7.5v at 11". Combined mag., colors. |
miscellaneous information
| note (category: group membership): | Hyades moving group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 3min 31,777sec | DEC: -57° 46' 31,5'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0196 arcsec/a | DEC: -0,095 arcsec/a | source: 25 | |
| radial velocity | -14 km/s | source: 25 | ||
| trigonometric parallax | 0,023 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 326,35° | latitude: -3,92° | ||
| GCI unit vector (J2000) | X: -0,259476 | Y: -0,46585 | Z: -0,845964 | |
magnitude:
| visual | 4,63 (observed) | source: 25 |
| photovisual | 3,7 | source: 16 |
| photographic | 4,9 | source: 2 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A7IV | source: 25 | |
| B-magnitude | 4,87 ±0,05 | B-V-magnitude | 0,24 |
| U-magnitude | 4,96 ±0,05 | U-B-magnitude | 0,09 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 0,1 |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,63 | A2 | i1Normae, HR 5961, HD 143474, SAO 243279 |
| B | 8,02 | - |
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 (J1950) | RA: 15h 59min 27,038sec | DEC: -57° 38' 11,19'' | ±0,043 arcsec |
| position (J2000) | RA: 16h 3min 31,947sec | DEC: -57° 46' 31,04'' | |
| proper motion J1950 (FK4) | RA: -0,0148 arcsec/a | DEC: -0,085 arcsec/a | ±0,01 arcsec/a in RA ±0,007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0155 arcsec/a | DEC: -0,085 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A2 |
| 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: 21535 |
| Durchmusterung | CP-57 7500AB |
| Boss General Catalogue | 21535 |
| Henry Draper Catalogue | 143474 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 3,5min | DEC: -57° 47' |
| proper motion (J2000) | RA: -0,157 arcsec/a | DEC: -0,095 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 | 1897 | 92 | ° | '' | 5,3 | 5,4 | A7IV | SEE 258 |
| AB-C | 1836 | 28 | 252° | 10,1'' | 4,64 | 8,02 | - | HJ 4825 |
| 1990 | 243° | 11'' |
discoverer information:
| discoverer code | discoverer | reference |
| SEE 258 | See, T.J. | - |
| HJ 4825 | Herschel, J. | - |
notes:
| note | Iota (1) Nor. P = 26.9yr., a = 0.37", motion retrograde. Proper motion of B -157 -095. |