12 Aquarii
catalogues and names
| catalogues and names | 12 Aqr, HR 8059, HD 200497, SAO 145065, BD -6 5664 A, WDS 21041-0549A |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 21h 4min 4.7sec | DEC: -5° 49' 23'' | ||
| position (B1900) | RA: 20h 58min 47.3sec | DEC: -6° 13' 9'' | ||
| proper motion (J2000) | RA: 0.018 arcsec/a | DEC: -0.009 arcsec/a | ||
| radial velocity | 1 km/s note: variable radial velocity |
|||
| dynamical parallax | 0.003 arcsec | |||
| galactic coordinates | longitude: 43.66° | latitude: -32.04° | ||
magnitude
| visual magnitude | 5.89 (original HR magnitude) |
spectral / color information
| spectral class | G4III |
| B-V-magnitude | 0.68 |
| U-B-magnitude | 0.41 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 2.7 arcsec |
| mag difference (of double or brightest multiple) | 1.9 |
| note (category: double and multiple data): | CPM with HR 8058. Colors for combined light. Mag. for blend 5.54V. Measured sep. Aa 1985.5 0.045" by speckle interferometry. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 21h 4min 4.742sec | DEC: -5° 49' 23.55'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0016 arcsec/a | DEC: -0.018 arcsec/a | source: 25 | |
| radial velocity | 1 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 43.67° | latitude: -32.04° | ||
magnitude:
| visual | 5.74 (observed) | source: 25 |
| photovisual | 5.2 | source: 16 |
| photographic | 6.3 | source: 2 |
spectral information:
| spectral class | F5 | source: 29 | |
| Morgan-Keenan | G4III | source: 25 | |
| B-magnitude | 6.58 ±0.05 | B-V-magnitude | 0.84 |
| U-magnitude | 7.06 ±0.05 | U-B-magnitude | 0.48 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.1 arcsec |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5.74 | F5 | 12 Aqr, HR 8059, HD 200497, SAO 145065 |
| B | 7.41 | F5 | 12 Aqr, HR 8058, HD 200496, SAO 145064 |
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 | |
| 29 | SAOJ2000 |
| SAO on FK5 at J2000, 1989 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (B1950) | RA: 21h 1min 26.061sec | DEC: -6° 1' 19.78'' | ±0.023 arcsec |
| position (J2000) | RA: 21h 4min 4.745sec | DEC: -5° 49' 23'' | |
| proper motion B1950 (FK4) | RA: 0.001 arcsec/a | DEC: -0.006 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0012 arcsec/a | DEC: -0.009 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: 29417 |
| Durchmusterung | BD-06 5664A |
| Boss General Catalogue | 29417 |
| Henry Draper Catalogue | 200497 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 21h 4.1min | DEC: -5° 49' |
| proper motion (J2000) | RA: 0.023 arcsec/a | DEC: -0.018 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 | 1978 | 5 | ° | 0.1'' | 5.53 | - | G4III | MCA 66 |
| Aa-B | 1831 | 73 | 190° | 2.7'' | 5.53 | 7.3 | - | STF2745 |
| 1991 | 195° | 2.4'' |
discoverer information:
| discoverer code | discoverer | reference |
| MCA 66 | McAlister, H.A. | - |
| STF2745 | Struve, F.G.W. | - |
notes:
| note | 12 Aqr. Proper motion of B -003 +015. |