n Scorpii
| catalogues and names | n Sco, 14 Sco, HR 6026, HD 145501, SAO 159763, WDS 16120-1928C |
| constellation | Scorpius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 11min 58,6sec | DEC: -19° 26' 59'' |
| position (J1900) | RA: 16h 6min 9,8sec | DEC: -19° 11' 25'' |
| proper motion (J2000) | RA: -0,01 arcsec/a | DEC: -0,009 arcsec/a |
| radial velocity | -14 km/s | |
| rotational velocity | 67 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,03 arcsec | |
| note (category: radial and/or rotational velocities): | ADS 9951D, -3k/s; vsini 73k/s. |
| note (category: dynamical parallaxes): | 0.009". |
magnitude
| visual magnitude | 6,3 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8V+B9VpSi |
| B-V-magnitude | 0,13 |
| U-B-magnitude | -0,37 |
| note (category: spectra): | Also classified B9III+B9.5V. |
double/multiple star system information
| number of components of multiple star system | 5 |
| separation | 41,1 arcsec |
| mag difference (of double or brightest multiple) | 2,5 |
| component ID | AC |
| note (category: double and multiple data): | ADS 9951 at least quintuple system with HR 6027 of which components CD = HR 6026 binary, 6.9 B8V or B9III, 7.9v B9Vp, sep. 2". C is -19d4332. |
miscellaneous information
| note (category: group membership): | Sco OB2; Sco-Cen cluster; upper Sco member; reflection nebula and dust surrounding star. Assoc. Sco R1; IC 4592 at 145 pc. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 11min 58,603sec | DEC: -19° 27' 0,15'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0003 arcsec/a | DEC: -0,018 arcsec/a | source: 25 | |
| radial velocity | -14 km/s | source: 25 | ||
| trigonometric parallax | 0,03 | ±0,003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 354,62° | latitude: 22,71° | ||
| GCI unit vector (J2000) | X: -0,428168 | Y: -0,840115 | Z: -0,332985 | |
magnitude:
| visual | 6,3 (observed) | source: 25 |
| photovisual | 6,2 | source: 16 |
| photographic | 6,5 | source: 2 |
spectral information:
| spectral class | A7 | source: 96 | |
| Morgan-Keenan | B8V+B9VpSi | source: 25 | |
| B-magnitude | 6,43 ±0,05 | B-V-magnitude | 0,13 |
| U-magnitude | 6,06 ±0,05 | U-B-magnitude | -0,37 |
double/multiple star system information:
| separation between brightest and second brightest component | 41,2 arcsec |
| magnitude difference between brightest and second brightest component | 1,9 |
| position angle | 337 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,01 | B3 | Jabbah, n Scorpii, 14 Sco, HR 6027, HD 145502, SAO 159764 |
| B | 6,3 | A7 | n Scorpii, 14 Sco, HR 6026, HD 145501, SAO 159763 |
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: 16h 9min 3,949sec | DEC: -19° 19' 17,45'' | ±0,03 arcsec |
| position (J2000) | RA: 16h 11min 58,573sec | DEC: -19° 26' 58,71'' | |
| proper motion J1950 (FK4) | RA: -0,0008 arcsec/a | DEC: -0,012 arcsec/a | ±0,005 arcsec/a in RA ±0,004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0007 arcsec/a | DEC: -0,009 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6,5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A |
| 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: 21771 |
| Durchmusterung | BD-19 4332 |
| Boss General Catalogue | 21771 |
| Henry Draper Catalogue | 145501 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 12min | DEC: -19° 28' |
| proper motion (J2000) | RA: -0,01 arcsec/a | DEC: -0,026 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 |
| Aa | 1988 | 2 | 172° | 0,1'' | 4,01 | - | B3V | CHR 146 |
| 1989 | 165° | - | ||||||
| Aa-B | 1876 | 66 | ° | 0,7'' | 4,4 | 6,9 | - | BU 120 |
| 1991 | - | 1,3'' | ||||||
| Aa-C | 1821 | 40 | 337° | 41,2'' | 4,4 | 6,26 | - | H 6 |
| CD | 1846 | 66 | 39° | 1,1'' | 6,8 | 7,5 | B8/9V | MTL 2 |
| 1974 | 53° | 2,3'' |
discoverer information:
| discoverer code | discoverer | reference |
| CHR 146 | - | - |
| BU 120 | Burnham, S.W. | - |
| H 6 | Herschel, W. | - |
| MTL 2 | Mitchel, O.M. | - |
notes:
| note | Nu Sco. A is a spectroscopic and occultation binary. H V 6. Shows two spectra, B8V+B9VpSi, so the system is at least quintuple. |