additional / editable data
| entry 1 (3/26/00,2:19:16 PM) |
 |
a1Librae
catalogues and names
| catalogues and names | a1Lib, 8 Lib, HR 5530, HD 130819, SAO 158836, BD -15 3965, FK5: 1387, WDS 14509-1603B |
| constellation | Libra |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 14h 50min 41.2sec | DEC: -15° 59' 50'' | ||
| position (2000.73) | RA: 14h 50min 43sec | DEC: -16° 0' 1'' | ||
| position (B1900) | RA: 14h 45min 9.2sec | DEC: -15° 34' 53'' | ||
| proper motion (J2000) | RA: -0.098 arcsec/a | DEC: -0.066 arcsec/a | ||
| radial velocity | -23 km/s note: variable radial velocity |
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| rotational velocity | 22 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.05 arcsec | |||
| galactic coordinates | longitude: 340.31° | latitude: 38.07° | ||
magnitude
| visual magnitude | 5.15 (V on UBV Johnson system) |
spectral / color information
| spectral class | F4IV |
| B-V-magnitude | 0.41 |
| U-B-magnitude | -0.03 |
| R-I-magnitude |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0 arcsec |
| mag difference (of double or brightest multiple) | 0.4 |
| component ID | O |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | CPM with HR 5531 at 231". Component A, HR 5531, is the suspected occultation double, 3.4, 3.8, sep. 0.01". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 14h 50min 41.207sec | DEC: -15° 59' 50.14'' | ±0.06 arcsec | source: 15 |
| position (2000.73) | RA: 14h 50min 43sec | DEC: -16° 0' 1'' | JD: 2451810.12 | |
| proper motion (J2000) | RA: -0.0068 arcsec/a | DEC: -0.066 arcsec/a | source: 25 | |
| radial velocity | -23 km/s | source: 25 | ||
| trigonometric parallax | 0.05 arcsec | ±0.005 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 340.32° | latitude: 38.07° | ||
magnitude:
| visual | 5.15 (observed) | source: 25 |
| photovisual | 5.3 | source: 2 |
| photographic | 5.8 | source: 2 |
spectral information:
| spectral class | F5 | source: 96 | |
| Morgan-Keenan | F4IV | source: 25 | |
| B-magnitude | 5.56 ±0.05 | B-V-magnitude | 0.41 |
| U-magnitude | 5.53 ±0.05 | U-B-magnitude | -0.03 |
double/multiple star system information:
| separation between brightest and second brightest component | 231 arcsec |
| magnitude difference between brightest and second brightest component | 2.4 |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 2.75 | A3 | Zuben Elgenubi, a2Librae, 9 Lib, HR 5531, HD 130841, SAO 158840 |
| B | 5.15 | F5 | a1Librae, 8 Lib, HR 5530, HD 130819, SAO 158836 |
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 | |
| 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: 14h 47min 54.959sec | DEC: -15° 47' 25.9'' | ±0.006 arcsec |
| position (2000.73) | RA: 14h 50min 44sec | DEC: -15° 59' 58'' | JD: 2451810.12 |
| position (J2000) | RA: 14h 50min 41.206sec | DEC: -15° 59' 50.32'' | |
| proper motion B1950 (FK4) | RA: -0.007 arcsec/a | DEC: -0.072 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0068 arcsec/a | DEC: -0.068 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | F5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1387 |
| Durchmusterung | BD-15 3965 |
| Boss General Catalogue | 19970 |
| Henry Draper Catalogue | 130819 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 14h 50.9min | DEC: -16° 3' |
| proper motion (J2000) | RA: -0.106 arcsec/a | DEC: -0.067 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 | 1823 | 6 | 314° | 231'' | 2.75 | 5.15 | A3IV F4IV | SHJ 186 |
| AC | 1987 | 1 | 291° | 277.9'' | 2.75 | 13.2 | - | AOT 53 |
| BC | 1987 | 1 | 236° | 112.5'' | 5.15 | 13.2 | - | AOT 53 |
discoverer information:
| discoverer code | discoverer | reference |
| SHJ 186 | South & Herschel | - |
| AOT 53 | - | - |
notes:
| note | Alpha (2) Lib. B is BD-15@3965. Proper motion of B -088 -056. A is a spectroscopic binary. |
additional / editable data
| entry 1 (3/26/00,2:19:16 PM) |
|