l Arietis
| catalogues and names | l Ari, 9 Ari, HR 569, HD 11973, SAO 75051, WDS 01579+2336A |
| constellation | Aries |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 1h 57min 55,7sec | DEC: +23° 35' 46'' |
| position (J1900) | RA: 1h 52min 21,2sec | DEC: +23° 6' 30'' |
| proper motion (J2000) | RA: -0,09 arcsec/a | DEC: -0,013 arcsec/a |
| radial velocity | -1 km/s note: spectroscopic binaries |
|
| rotational velocity | 99 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,028 arcsec | |
magnitude
| visual magnitude | 4,79 (V on UBV Johnson system) |
spectral / color information
| spectral class | F0V |
| B-V-magnitude | 0,28 |
| U-B-magnitude | 0,09 |
| R-I-magnitude | 0,16 |
variability information
| variable star identification | 680 |
| note (category: variability): | ADS 1563B; Cst? 7.30 - 740V. |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 37,4 arcsec |
| mag difference (of double or brightest multiple) | 2,5 |
| component ID | AB |
| note (category: double and multiple data): | ADS 1563B, 7.40V, +0.58(B-V), +0.07(U-B), dG1, CPM; vsini =<25k/s. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 1h 57min 55,706sec | DEC: +23° 35' 45,67'' | ±0,43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0071 arcsec/a | DEC: -0,016 arcsec/a | source: 25 | |
| radial velocity | -1 km/s | source: 25 | ||
| trigonometric parallax | 0,028 | ±0,003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 142,05° | latitude: -36,8° | ||
| GCI unit vector (J2000) | X: 0,797727 | Y: 0,451003 | Z: 0,400285 | |
magnitude:
| visual | 4,79 (observed) | source: 25 |
| photovisual | 4,8 | source: 2 |
| photographic | 5 | source: 16 |
spectral information:
| spectral class | A5 | source: 96 | |
| Morgan-Keenan | F0V | source: 25 | |
| B-magnitude | 5,07 ±0,05 | B-V-magnitude | 0,28 |
| U-magnitude | 5,16 ±0,05 | U-B-magnitude | 0,09 |
double/multiple star system information:
| separation between brightest and second brightest component | 38,5 arcsec |
| position angle | 47 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,79 | A5 | l Arietis, 9 Ari, HR 569, HD 11973, SAO 75051 |
| B | 7,37 | G0 |
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 (J1950) | RA: 1h 55min 8,177sec | DEC: +23° 21' 11,25'' | ±0,011 arcsec |
| position (J2000) | RA: 1h 57min 55,729sec | DEC: +23° 35' 45,9'' | |
| proper motion J1950 (FK4) | RA: -0,0065 arcsec/a | DEC: -0,009 arcsec/a | ±0,002 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0065 arcsec/a | DEC: -0,013 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,8 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A5 |
| 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: 2366 |
| Durchmusterung | BD+22 288 |
| Boss General Catalogue | 2366 |
| Henry Draper Catalogue | 11973 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 1h 57,9min | DEC: +23° 36' |
| proper motion (J2000) | RA: -0,092 arcsec/a | DEC: -0,017 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 | 1781 | 37 | 46° | 37,4'' | - | 7,33 | F0IV F7V | H 12 |
| 1972 | 47° | 38,5'' | ||||||
| AC | 1923 | 1 | 75° | 179,2'' | - | 9,7 | F0IV K | H 12 |
| AD | 1923 | 1 | 84° | 261,2'' | - | 11,55 | F0IV | H 12 |
discoverer information:
| discoverer code | discoverer | reference |
| H 12 | Herschel, W. | - |
notes:
| note | H V 12. Lambda Ari. A is a Beta Lyrae-type and spectroscopic binary. B is BD+22@289. |