b Muscae
| catalogues and names | b Mus, HR 4844, HD 110879, SAO 252019, WDS 12463-6806 |
| constellation | Musca |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 12h 46min 16,9sec | DEC: -68° 6' 29'' |
| position (J1900) | RA: 12h 40min 8,7sec | DEC: -67° 33' 38'' |
| proper motion (J2000) | RA: -0,039 arcsec/a | DEC: -0,017 arcsec/a |
| radial velocity | 42 km/s note: variable radial velocity |
|
| rotational velocity | 184 km/s (uncertain) (variable) | |
| dynamical parallax | 0,015 arcsec | |
magnitude
| visual magnitude | 3,05 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2.5V |
| B-V-magnitude | -0,18 |
| U-B-magnitude | -0,74 |
| R-I-magnitude | -0,21 |
double/multiple star system information
| separation | 1,3 arcsec |
| mag difference (of double or brightest multiple) | 0,2 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | 3.7 B2V, 4.0 B3V, 383.12y, a = 1.735". Combined mag., colors. |
miscellaneous information
| note (category: group membership): | Sco-Cen assoc. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 12h 46min 16,833sec | DEC: -68° 6' 28,67'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0064 arcsec/a | DEC: -0,011 arcsec/a | source: 25 | |
| radial velocity | 42 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 302,45° | latitude: -5,24° | ||
| GCI unit vector (J2000) | X: -0,365282 | Y: -0,074783 | Z: -0,927888 | |
magnitude:
| visual | 3,05 (observed) | source: 25 |
| photovisual | 3,3 | source: 2 |
| photographic | 3,1 | source: 2 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B2.5V | source: 25 | |
| B-magnitude | 2,87 ±0,05 | B-V-magnitude | -0,18 |
| U-magnitude | 2,13 ±0,05 | U-B-magnitude | -0,74 |
double/multiple star system information:
| separation between brightest and second brightest component | 1,2 arcsec |
| magnitude difference between brightest and second brightest component | 0,3 |
| position angle | 35 ° |
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: 12h 43min 11,492sec | DEC: -67° 50' 5,16'' | ±0,022 arcsec |
| position (J2000) | RA: 12h 46min 16,897sec | DEC: -68° 6' 29,47'' | |
| proper motion J1950 (FK4) | RA: -0,0056 arcsec/a | DEC: -0,024 arcsec/a | ±0,004 arcsec/a in RA ±0,004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,007 arcsec/a | DEC: -0,017 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,3 (accuracy: 2 decimals) |
| source of visual magnitude data | Combined magnitude of component stars. |
spectral information:
| spectral class | B3 |
| source of spectral data | Taken from the HD with M stars reclassified by Miss Cannon. |
remarks for duplicity and variability
| Double star - see source catalog for source |
catalogues
| source catalogue | FK3, catalogue number: 480 |
| Durchmusterung | CP-67 2064 |
| Boss General Catalogue | 17348 |
| Henry Draper Catalogue | 110879 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 12h 46,3min | DEC: -68° 6' |
| proper motion (J2000) | RA: -0,036 arcsec/a | DEC: -0,011 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 |
| - | 1880 | 70 | 317° | 0,6'' | 3,6 | 3,9 | B2.5V | R 207 |
| 1991 | 35° | 1,2'' |
discoverer information:
| discoverer code | discoverer | reference |
| R 207 | Russell, H.C. | - |
notes:
| note | Beta Mus. P = 383yr., a = 1.74", motion direct. A has variable radial velocity. |