SV Leonis Minoris
catalogues and names
| catalogues and names | SV LMi, 11 LMi, HR 3815, HD 82885, SAO 61586, BD +36 1979, WDS 09357+3549 |
| constellation | Leo Minor |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 9h 35min 39.6sec | DEC: +35° 48' 37'' | ||
| position (B1900) | RA: 9h 29min 39.7sec | DEC: +36° 15' 45'' | ||
| proper motion (J2000) | RA: -0.706 arcsec/a | DEC: -0.241 arcsec/a | ||
| radial velocity | 13 km/s note: suspected variable radial velocity |
|||
| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.109 arcsec | |||
| galactic coordinates | longitude: 188.49° | latitude: 47.81° | ||
| note (category: dynamical parallaxes): | 0.14". |
magnitude
| visual magnitude | 5.41 (V on UBV Johnson system) |
spectral / color information
| spectral class | G8V |
| B-V-magnitude | 0.77 |
| U-B-magnitude | 0.44 |
| R-I-magnitude |
variability information
| variable star identification | SV LMi |
| note (category: variability): | Amp. 0.033y, 18.0d, possibly due to rotational modulation. |
double/multiple star system information
| separation | 3.3 arcsec |
| mag difference (of double or brightest multiple) | 8.5 |
| note (category: double and multiple data): | Binary? |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 9h 35min 39.509sec | DEC: +35° 48' 36.79'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0595 arcsec/a | DEC: -0.239 arcsec/a | source: 25 | |
| radial velocity | 13 km/s | source: 25 | ||
| trigonometric parallax | 0.109 arcsec | ±0.011 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 188.5° | latitude: 47.81° | ||
magnitude:
| visual | 5.41 (observed) | source: 25 |
| photovisual | 5.5 | source: 2 |
| photographic | 6.5 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | G8IV-V | source: 25 | |
| B-magnitude | 6.18 ±0.05 | B-V-magnitude | 0.77 |
| U-magnitude | 6.62 ±0.05 | U-B-magnitude | 0.44 |
variability information:
| variability type | 273 |
| var. amplitude | 0 |
double/multiple star system information:
| separation between brightest and second brightest component | 3.3 arcsec |
| magnitude difference between brightest and second brightest component | 7.7 |
| position angle | 55 ° |
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 | |
| 27 | Catalog of Red Magnitudes (CRM) |
| Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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: 9h 32min 39.993sec | DEC: +36° 2' 14.72'' | ±0.02 arcsec |
| position (J2000) | RA: 9h 35min 39.598sec | DEC: +35° 48' 36.69'' | |
| proper motion B1950 (FK4) | RA: -0.0582 arcsec/a | DEC: -0.248 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.058 arcsec/a | DEC: -0.241 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K0 |
| 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: 13242 |
| Durchmusterung | BD+36 1979 |
| Boss General Catalogue | 13242 |
| Henry Draper Catalogue | 82885 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 9h 35.7min | DEC: +35° 49' |
| proper motion (J2000) | RA: -0.716 arcsec/a | DEC: -0.24 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 |
| - | 1905 | 18 | 35° | 5.8'' | 4.8 | 12.5 | G8V | HU 1128 |
| 1988 | 55° | 3.3'' |
discoverer information:
| discoverer code | discoverer | reference |
| HU 1128 | Hussey, W.J. | - |
notes:
| note | 11 LMi. Companion not seen 1941-1958 (Van Biesbroesk 82-inch). P = 201yr., a = 3.84", motion retrograde. Proper motion of B -724 -239. A is slightly variable, SV LMi, P = 18d, probably due to starspots. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 9h 32min 40sec | DEC: +36° 2' 15'' |
variability informations:
| variability type | RS: | eruptive variable star |
| magnitute at max. brightness | 5.39 | |
| magnitute amplitude | 0.04 | |
| photometric system | visual, photovisual or Johnson's V |
references
| to a study | B.A.Skiff, G.W.Lockwood, PASP 98,No.601,338,1986. |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 47/22 |
| constellation | Leo Minor |
| notes on existence | The star is equivalent to '69146'. |
variability type description
| variability type | description |
| RS | Eruptive variables of the RS Canum Venaticorum type. This type is ascribed to close binary systems with spectra showing Ca II H and K in emission, their components having enhanced chromospheric activity that causes quasi-periodic light variability. The period of variation is close to the orbital one, and the variability amplitude is usually as great as 0.2 mag in V (UX Ari). They are X-ray sources and rotating variables. RS CVn itself is also an eclipsing system. |