b Leonis Minoris
| catalogues and names | b LMi, 31 LMi, HR 4100, HD 90537, SAO 62053, FK5: 390, WDS 10279+3642 |
| constellation | Leo Minor |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 10h 27min 53sec | DEC: +36° 42' 26'' |
| position (J1900) | RA: 10h 22min 6,1sec | DEC: +37° 13' 11'' |
| proper motion (J2000) | RA: -0,118 arcsec/a | DEC: -0,101 arcsec/a |
| radial velocity | 6 km/s note: spectroscopic binaries note: orbital data avaible |
|
| rotational velocity | <19 km/s | |
| trigonometric parallax | 0,022 arcsec | |
| note (category: dynamical parallaxes): | 0.017". |
magnitude
| visual magnitude | 4,21 (V on UBV Johnson system) |
spectral / color information
| spectral class | G9IIIab |
| B-V-magnitude | 0,9 |
| U-B-magnitude | 0,64 |
| R-I-magnitude | 0,46 |
double/multiple star system information
| separation | 0,5 arcsec |
| mag difference (of double or brightest multiple) | 1,7 |
| note (category: double and multiple data): | 4.40 G8III-IV, 6.12 F8V, 37.92y, a = 0.340". Combined mag., colors. |
| note (category: spectroscopic binaries): | ADS 7780A, 37.9y, K 3.2k/s, V0 +5.7k/s, asini 476. Masses 2.1 and 0.5 solar. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 10h 27min 53,009sec | DEC: +36° 42' 26,06'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0,0098 arcsec/a | DEC: -0,101 arcsec/a | source: 25 | |
| radial velocity | 6 km/s | source: 25 | ||
| trigonometric parallax | 0,022 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 186,29° | latitude: 58,28° | ||
| GCI unit vector (J2000) | X: -0,737809 | Y: 0,313624 | Z: 0,597726 | |
magnitude:
| visual | 4,21 (observed) | source: 25 |
| photovisual | 4,4 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | G9IIIab | source: 25 | |
| B-magnitude | 5,11 ±0,05 | B-V-magnitude | 0,9 |
| U-magnitude | 5,75 ±0,05 | U-B-magnitude | 0,64 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 2 |
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: 10h 24min 59,888sec | DEC: +36° 57' 50,88'' | ±0,005 arcsec |
| position (J2000) | RA: 10h 27min 53,009sec | DEC: +36° 42' 26,2'' | |
| proper motion J1950 (FK4) | RA: -0,01 arcsec/a | DEC: -0,105 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0099 arcsec/a | DEC: -0,1 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 390 |
| Durchmusterung | BD+37 2080 |
| Boss General Catalogue | 14358 |
| Henry Draper Catalogue | 90537 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 10h 27,9min | DEC: +36° 42' |
| proper motion (J2000) | RA: -0,118 arcsec/a | DEC: -0,101 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 |
| - | 1904 | often | ° | '' | 4,4 | 6,4 | G8III | HU 879 |
discoverer information:
| discoverer code | discoverer | reference |
| HU 879 | Hussey, W.J. | - |
notes:
| note | Beta LMi. P = 37.9yr., a = 0.34", motion direct in a highly-inclined orbit. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (J1900) | RA: 10h 22,1min | DEC: +37° 13' |
magnitudes, spectral classes, orbital elements:
| author: | W.D. Heintz |
| date of observation: | 1981 |
| magnitude of component A: | 4,4 |
| magnitude of component B: | 4,4 |
| spectral class component B: | G9III |
| spectral class component B: | G9III |
| period [y]: | 37,92 |
| semi-major axis [arcsec]: | 0,34 |
| inclination [deg]: | 77 |
| node [deg]: | 39 (ascending) |
| equinox of node: | 2000 |
| eccentricity: | 0,748 |
| time of periastron passage: | 1960,98 |
| grade: | good |
| reference: | Circ. Inf. No. 84, 1981. |
| notes | Combined visual-spectroscopic orbit. Visual observations alone only cover a narrow apastron arc. |