51 Aquarii
catalogues and names
| catalogues and names | 51 Aqr, HR 8533, HD 212404, SAO 146067, BD -5 5780, WDS 22241-0450A |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 22h 24min 6.9sec | DEC: -4° 50' 13'' | ||
| position (B1900) | RA: 22h 18min 54.3sec | DEC: -5° 20' 35'' | ||
| proper motion (J2000) | RA: 0.033 arcsec/a | DEC: -0.004 arcsec/a | ||
| radial velocity | 6 km/s | |||
| rotational velocity | 65 km/s (uncertain) (variable) | |||
| dynamical parallax | 0.006 arcsec | |||
| galactic coordinates | longitude: 58.72° | latitude: -48.44° | ||
magnitude
| visual magnitude | 5.78 (V on UBV Johnson system) |
spectral / color information
| spectral class | A0V |
| B-V-magnitude | -0.04 |
| U-B-magnitude | -0.11 |
double/multiple star system information
| number of components of multiple star system | 5 |
| separation | 0.3 arcsec |
| mag difference (of double or brightest multiple) | 0 |
| component ID | AB |
| note (category: double and multiple data): | AB 6.6 A0, 6.6, 190y, a = 0.490". Measured sep. 0.121" on 1985.5 by speckle interferometry. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 22h 24min 6.887sec | DEC: -4° 50' 13.68'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0018 arcsec/a | DEC: -0.017 arcsec/a | source: 25 | |
| radial velocity | 6 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 58.73° | latitude: -48.44° | ||
magnitude:
| visual | 5.78 (observed) | source: 25 |
| photovisual | 6 | source: 16 |
| photographic | 5.9 | source: 2 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | A0V | source: 25 | |
| B-magnitude | 5.74 ±0.05 | B-V-magnitude | -0.04 |
| U-magnitude | 5.63 ±0.05 | U-B-magnitude | -0.11 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.2 arcsec |
| magnitude difference between brightest and second brightest component | 0.2 |
| position angle | 82 ° |
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: 22h 21min 30.638sec | DEC: -5° 5' 26.02'' | ±0.018 arcsec |
| position (J2000) | RA: 22h 24min 6.91sec | DEC: -4° 50' 12.71'' | |
| proper motion B1950 (FK4) | RA: 0.002 arcsec/a | DEC: 0 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0022 arcsec/a | DEC: -0.004 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 | 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: 31307 |
| Durchmusterung | BD-05 5780 |
| Boss General Catalogue | 31307 |
| Henry Draper Catalogue | 212404 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 22h 24.1min | DEC: -4° 50' |
| proper motion (J2000) | RA: 0.029 arcsec/a | DEC: -0.014 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 | 1875 | often | 20° | 0.5'' | 6.4 | 6.6 | A0V | BU 172 |
| 1994 | 82° | 0.2'' | ||||||
| AB-C | 1898 | 5 | 342° | 54.4'' | 5.78 | 10.1 | - | BU 172 |
| AB-D | 1898 | 6 | 191° | 113.7'' | 5.78 | 10 | - | BU 172 |
| 1962 | - | 119.2'' | ||||||
| AB-E | 1898 | 6 | 133° | 132.4'' | 5.78 | 9.78 | - | BU 172 |
| 1962 | - | 130.7'' |
discoverer information:
| discoverer code | discoverer | reference |
| BU 172 | Burnham, S.W. | - |
notes:
| note | 51 Aqr. P = 145.5yr., a = 0.41", motion retrograde. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 22h 18.9min | DEC: -5° 21' |
magnitudes, spectral classes, orbital elements:
| author: | W.D. Heintz |
| date of observation: | 1974 |
| magnitude of component A: | 6.5 |
| magnitude of component B: | 6.5 |
| spectral class component B: | A0V |
| spectral class component B: | A0V |
| period [y]: | 190 |
| semi-major axis [arcsec]: | 0.49 |
| inclination [deg]: | 137 |
| node [deg]: | 160.9 |
| equinox of node: | 2000 |
| eccentricity: | 0.46 |
| time of periastron passage: | 1997 |
| dates of ephemeris: | 1974-1992 |
| grade: | preliminary |
| reference: | Astrophys. J. Suppl. 29, 331; 1975. |
| other name(s) | BU 172, 51 Aqr |