e Normae
| catalogues and names | e Nor, HR 6115, HD 147971, SAO 226773, WDS 16272-4733A |
| constellation | Norma |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 27min 11,1sec | DEC: -47° 33' 18'' |
| position (J1900) | RA: 16h 19min 50,9sec | DEC: -47° 19' 36'' |
| proper motion (J2000) | RA: -0,005 arcsec/a | DEC: -0,03 arcsec/a |
| radial velocity | -12 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
|
| rotational velocity | 165 km/s (uncertain) (variable) | |
magnitude
| visual magnitude | 4,47 (V on UBV Johnson system) |
spectral / color information
| spectral class | B4V |
| B-V-magnitude | -0,07 |
| U-B-magnitude | -0,53 |
| R-I-magnitude | -0,04 |
double/multiple star system information
| separation | 22,8 arcsec |
| mag difference (of double or brightest multiple) | 2,7 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Companion 7.46v B9V, CPM, possibly binary with the SB. |
| note (category: spectroscopic binaries): | Primary of visual double, B2, B9.5, 3.2617d, K 122.5k/s, V0 -12.5k/s, asini 5.45. Equal components. |
miscellaneous information
| note (category: group membership): | Sco-Cen assoc. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 27min 11,01sec | DEC: -47° 33' 17,68'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0021 arcsec/a | DEC: -0,033 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 336,01° | latitude: 0,98° | ||
| GCI unit vector (J2000) | X: -0,265909 | Y: -0,62029 | Z: -0,737924 | |
magnitude:
| visual | 4,46 (observed) | source: 25 |
| photovisual | 4,8 | source: 16 |
| photographic | 4,7 | source: 2 |
spectral information:
| spectral class | B5 | source: 96 | |
| Morgan-Keenan | B4V | source: 25 | |
| B-magnitude | 4,39 ±0,05 | B-V-magnitude | -0,07 |
| U-magnitude | 3,86 ±0,05 | U-B-magnitude | -0,53 |
double/multiple star system information:
| separation between brightest and second brightest component | 22,8 arcsec |
| magnitude difference between brightest and second brightest component | 2,66 |
| position angle | 335 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,46 | B5 | e Normae, HR 6115, HD 147971, SAO 226773 |
| B | 7,57 | A7 |
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: 16h 23min 30,537sec | DEC: -47° 26' 34,34'' | ±0,03 arcsec |
| position (J2000) | RA: 16h 27min 11,083sec | DEC: -47° 33' 18,2'' | |
| proper motion J1950 (FK4) | RA: -0,0004 arcsec/a | DEC: -0,03 arcsec/a | ±0,007 arcsec/a in RA ±0,005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0005 arcsec/a | DEC: -0,029 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 | B5 |
| 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: 22106 |
| Durchmusterung | CD-4710765 |
| Boss General Catalogue | 22106 |
| Henry Draper Catalogue | 147971 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 27,2min | DEC: -47° 33' |
| proper motion (J2000) | RA: -0,009 arcsec/a | DEC: -0,009 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 |
| - | 1836 | 14 | 335° | 22,8'' | 4,54 | 7,2 | B2V | HJ 4853 |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 4853 | Herschel, J. | - |
notes:
| note | Epsilon Nor. The primary is a spectroscopic binary. B is CD-47@10764. Proper motion of B -010 -026. |