e Lupi
| catalogues and names | e Lup, NSV 20302, HR 5708, HD 136504, SAO 225712, WDS 15227-4441A |
| constellation | Lupus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 15h 22min 40,9sec | DEC: -44° 41' 22'' |
| position (J1900) | RA: 15h 15min 53,3sec | DEC: -44° 19' 47'' |
| proper motion (J2000) | RA: -0,019 arcsec/a | DEC: -0,013 arcsec/a |
| radial velocity | 8 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
|
| rotational velocity | 133 km/s (uncertain) (variable) | |
| dynamical parallax | 0,009 arcsec | |
| note (category: radial and/or rotational velocities): | Comp. C, -26k/s. |
magnitude
| visual magnitude | 3,37 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2IV-V |
| B-V-magnitude | -0,18 |
| U-B-magnitude | -0,75 |
| R-I-magnitude | -0,16 |
variability information
| variable star identification | Var? |
| note (category: variability): | Var? Amp. 0.015b. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0,4 arcsec |
| mag difference (of double or brightest multiple) | 1,5 |
| component ID | AB |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | AB binary. Combined mag., colors. C, 9v at 27" probably optical. |
| note (category: spectroscopic binaries): | Primary of visual system, 4.5598d, K 56.1k/s, V0 +7.9k/s, msin3i 0.404, asini 3.40. |
miscellaneous information
| note (category: group membership): | Upper Cen group of Sco-Cen assoc. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 15h 22min 40,869sec | DEC: -44° 41' 22,63'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0016 arcsec/a | DEC: -0,028 arcsec/a | source: 25 | |
| radial velocity | 8 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 329,23° | latitude: 10,32° | ||
| GCI unit vector (J2000) | X: -0,450573 | Y: -0,54991 | Z: -0,703266 | |
magnitude:
| visual | 3,37 (observed) | source: 25 |
| photovisual | 2,8 | source: 16 |
| photographic | 3,6 | source: 2 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B2IV-V | source: 25 | |
| B-magnitude | 3,19 ±0,05 | B-V-magnitude | -0,18 |
| U-magnitude | 2,44 ±0,05 | U-B-magnitude | -0,75 |
double/multiple star system information:
| separation between brightest and second brightest component | 0,3 arcsec |
| magnitude difference between brightest and second brightest component | 1,7 |
| position angle | 176 ° |
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: 15h 19min 16,513sec | DEC: -44° 30' 40,2'' | ±0,034 arcsec |
| position (J2000) | RA: 15h 22min 40,863sec | DEC: -44° 41' 21,92'' | |
| proper motion J1950 (FK4) | RA: -0,0018 arcsec/a | DEC: -0,015 arcsec/a | ±0,006 arcsec/a in RA ±0,004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0018 arcsec/a | DEC: -0,013 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B3 |
| 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: 20659 |
| Durchmusterung | CD-4410066 |
| Boss General Catalogue | 20659 |
| Henry Draper Catalogue | 136504 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 15h 22,7min | DEC: -44° 41' |
| proper motion (J2000) | RA: -0,014 arcsec/a | DEC: -0,018 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 | 1896 | 30 | 282° | 1,3'' | 3,6 | 5,3 | B2IV-V | COP 2 |
| 1992 | 176° | 0,3'' | ||||||
| AC | 1826 | 12 | 174° | 26,4'' | 3,6 | 9,1 | - | DUN 182 |
| 1980 | 169° | - |
discoverer information:
| discoverer code | discoverer | reference |
| COP 2 | - | - |
| DUN 182 | Dunlop, J. | - |
notes:
| note | Epsilon Lup. A is a spectroscopic binary. |