b Microscopii
| catalogues and names | b Mic, HR 7979, HD 198529, SAO 212499 |
| constellation | Microscopium |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 20h 51min 58,8sec | DEC: -33° 10' 38'' |
| position (J1900) | RA: 20h 45min 46,1sec | DEC: -33° 33' 7'' |
| proper motion (J2000) | RA: 0,015 arcsec/a | DEC: 0,014 arcsec/a |
| radial velocity | -12 km/s note: suspected variable radial velocity |
|
magnitude
| visual magnitude | 6,04 (V on UBV Johnson system) |
spectral / color information
| spectral class | A2Vn |
| B-V-magnitude | 0,03 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 20h 51min 58,763sec | DEC: -33° 10' 40,53'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0003 arcsec/a | DEC: 0,001 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 10,74° | latitude: -38,57° | ||
| GCI unit vector (J2000) | X: 0,570761 | Y: -0,612176 | Z: -0,547241 | |
magnitude:
| visual | 6,04 (observed) | source: 25 |
| photovisual | 6,4 | source: 16 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A2Vn | source: 25 | |
| B-magnitude | 6,07 ±0,05 | B-V-magnitude | 0,03 |
sources:
| 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 | |
| 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: 20h 48min 52,686sec | DEC: -33° 21' 57,72'' | ±0,046 arcsec |
| position (J2000) | RA: 20h 51min 58,797sec | DEC: -33° 10' 38,37'' | |
| proper motion J1950 (FK4) | RA: 0,0012 arcsec/a | DEC: 0,017 arcsec/a | ±0,009 arcsec/a in RA ±0,007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0012 arcsec/a | DEC: 0,014 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A2 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 29080 |
| Durchmusterung | CD-3315245 |
| Boss General Catalogue | 29080 |
| Henry Draper Catalogue | 198529 |