Sadalmeilk
| catalogues and names | Sadalmeilk, a Aqr, 34 Aqr, HR 8414, HD 209750, SAO 145862, FK5: 827, WDS 22058-0019 |
| other names | Sadalmelek, Sadlamulk, El Melik, Saad el Melik |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | SADALMELIK; Sadalmelek; Sadlamulk; El Melik; Saad el Melik. |
position, motion, parallax:
| position (J2000) | RA: 22h 5min 47sec | DEC: -0° 19' 11'' |
| position (J1900) | RA: 22h 0min 38,9sec | DEC: -0° 48' 21'' |
| proper motion (J2000) | RA: 0,02 arcsec/a | DEC: -0,01 arcsec/a |
| radial velocity | 8 km/s note: suspected variable radial velocity |
|
| rotational velocity | <17 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,012 arcsec | |
magnitude
| visual magnitude | 2,96 (V on UBV Johnson system) |
spectral / color information
| spectral class | G2Ib |
| B-V-magnitude | 0,98 |
| U-B-magnitude | 0,74 |
| R-I-magnitude | 0,49 |
variability information
| note (category: variability): | He 10830 possibly variable. |
double/multiple star system information
| separation | 113 arcsec |
| mag difference (of double or brightest multiple) | 9 |
| note | Worley (1978) update of the IDS |
miscellaneous information
| note (category: group membership): | See HR 8232. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 22h 5min 47,038sec | DEC: -0° 19' 11,47'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0013 arcsec/a | DEC: -0,01 arcsec/a | source: 25 | |
| radial velocity | 8 km/s | source: 25 | ||
| trigonometric parallax | 0,012 | ±0,001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 59,94° | latitude: -42,07° | ||
| GCI unit vector (J2000) | X: 0,878353 | Y: -0,477979 | Z: -0,005582 | |
magnitude:
| visual | 2,96 (observed) | source: 25 |
| photovisual | 3,2 | source: 2 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G2Ib | source: 25 | |
| B-magnitude | 3,94 ±0,05 | B-V-magnitude | 0,98 |
| U-magnitude | 4,68 ±0,05 | U-B-magnitude | 0,74 |
double/multiple star system information:
| separation between brightest and second brightest component | 113 arcsec |
| magnitude difference between brightest and second brightest component | 9,2 |
| position angle | 41 ° |
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 | |
| 15 | FK5, FK5 Extension and FK5 Supplement |
| Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 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: 22h 3min 12,946sec | DEC: -0° 33' 48,59'' | ±0,003 arcsec |
| position (J2000) | RA: 22h 5min 47,033sec | DEC: -0° 19' 11,38'' | |
| proper motion J1950 (FK4) | RA: 0,0011 arcsec/a | DEC: -0,004 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0013 arcsec/a | DEC: -0,009 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | G0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 827 |
| Durchmusterung | BD-01 4246 |
| Boss General Catalogue | 30896 |
| Henry Draper Catalogue | 209750 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 22h 5,8min | DEC: -0° 19' |
| proper motion (J2000) | RA: 0,02 arcsec/a | DEC: -0,01 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 |
| - | 1879 | 2 | 42° | 114,6'' | 2,96 | 12,2 | G2Ib | BUP 232 |
| 1907 | 41° | 113'' |
discoverer information:
| discoverer code | discoverer | reference |
| BUP 232 | - | - |
notes:
| note | Alpha Aqr. |