n2Bootis
| catalogues and names | n2Boo, NSV 20328, 53 Boo, HR 5774, HD 138629, SAO 45590, WDS 15318+4054 |
| constellation | Bootes |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 15h 31min 47sec | DEC: +40° 53' 58'' |
| position (J1900) | RA: 15h 28min 12,1sec | DEC: +41° 14' 19'' |
| proper motion (J2000) | RA: -0,017 arcsec/a | DEC: -0,009 arcsec/a |
| radial velocity | -17 km/s note: suspected variable radial velocity |
|
| rotational velocity | 182 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,02 arcsec | |
magnitude
| visual magnitude | 5,02 (V on UBV Johnson system) |
spectral / color information
| spectral class | A5V |
| B-V-magnitude | 0,07 |
| U-B-magnitude | 0,11 |
| R-I-magnitude | 0,04 |
| note (category: spectra): | Shell star. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0,1 arcsec |
| mag difference (of double or brightest multiple) | 0 |
| component ID | AB |
| note (category: double and multiple data): | Combined mag., colors. Companion resolved by speckle interferometry, sep. 0.040" on 1985.5. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 15h 31min 46,977sec | DEC: +40° 53' 57,86'' | ±0,35 arcsec | source: 17 |
| proper motion (J2000) | RA: -0,0016 arcsec/a | DEC: -0,009 arcsec/a | source: 25 | |
| radial velocity | -17 km/s | source: 25 | ||
| trigonometric parallax | 0,02 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 66,17° | latitude: 54,41° | ||
| GCI unit vector (J2000) | X: -0,45546 | Y: -0,603226 | Z: 0,654733 | |
magnitude:
| visual | 5,02 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 5 | source: 16 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A5V | source: 25 | |
| B-magnitude | 5,09 ±0,05 | B-V-magnitude | 0,07 |
| U-magnitude | 5,2 ±0,05 | U-B-magnitude | 0,11 |
double/multiple star system information:
| separation between brightest and second brightest component | 0,1 arcsec |
| magnitude difference between brightest and second brightest component | 0 |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
| 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 29min 59,475sec | DEC: +41° 4' 5,26'' | ±0,013 arcsec |
| position (J2000) | RA: 15h 31min 46,993sec | DEC: +40° 53' 57,96'' | |
| proper motion J1950 (FK4) | RA: -0,0019 arcsec/a | DEC: -0,012 arcsec/a | ±0,002 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0015 arcsec/a | DEC: -0,009 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (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: 20883 |
| Durchmusterung | BD+41 2611 |
| Boss General Catalogue | 20883 |
| Henry Draper Catalogue | 138629 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 15h 31,8min | DEC: +40° 54' |
| proper motion (J2000) | RA: -0,018 arcsec/a | DEC: -0,009 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 | 1907 | 31 | ° | 0,1'' | 5,8 | 5,8 | A5V | A 1634 |
| AB-C | 1913 | - | 89° | 92,6'' | - | 13 | - | BU 1450 |
| AB-D | 1984 | 1 | 320° | 121,1'' | 5,1 | 13 | - | KZA 97 |
discoverer information:
| discoverer code | discoverer | reference |
| A 1634 | Aitken, R.G. | - |
| BU 1450 | Burnham, S.W. | - |
| KZA 97 | Kazeza, S.M. | - |
notes:
| note | Nu (2) Boo. An example of adequate resolution provided only by speckle: P = 8.48yr., a = 0.060", motion retrograde. |