Azelfafage
catalogues and names |
The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) |
SKY2000 - Master Star Catalog |
Smithsonian Astrophysical Observatory Star Catalog |
catalogues and names
catalogues and names | Azelfafage, p1Cyg, 80 Cyg, HR 8301, HD 206672, SAO 33665, BD +50 3410, FK5: 3733 |
constellation | Cygnus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
note (category: star names): | Azelfafage. |
position, motion, parallax:
position (J2000) | RA: 21h 42min 5.7sec | DEC: +51° 11' 23'' | ||
position (B1900) | RA: 21h 38min 32.5sec | DEC: +50° 43' 59'' | ||
proper motion (J2000) | RA: 0.006 arcsec/a | DEC: -0.006 arcsec/a | ||
radial velocity | -8 km/s note: spectroscopic binaries note: orbital data avaible |
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rotational velocity | 109 km/s (uncertain) (variable) | |||
galactic coordinates | longitude: 95.48° | latitude: -1.3° |
magnitude
visual magnitude | 4.67 (V on UBV Johnson system) |
spectral / color information
spectral class | B3IV |
B-V-magnitude | -0.12 |
U-B-magnitude | -0.68 |
R-I-magnitude |
double/multiple star system information
note (category: spectroscopic binaries): | 26.33d, K 16.5k/s, V0 -8.2k/s, asini 5.97. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 21h 42min 5.655sec | DEC: +51° 11' 22.85'' | ±0.2 arcsec | source: 52 |
proper motion (J2000) | RA: 0.0001 arcsec/a | DEC: 0.001 arcsec/a | source: 25 | |
radial velocity | -8 km/s | source: 25 | ||
galactic coord. (B1950) | longitude: 95.49° | latitude: -1.3° |
magnitude:
visual | 4.67 (observed) | source: 25 |
photovisual | 4.8 | source: 2 |
photographic | 4.6 | source: 16 |
spectral information:
spectral class | B3 | source: 96 | |
Morgan-Keenan | B3IV | source: 25 | |
B-magnitude | 4.55 ±0.05 | B-V-magnitude | -0.12 |
U-magnitude | 3.87 ±0.05 | U-B-magnitude | -0.68 |
double/multiple star system information:
separation between brightest and second brightest component | 0.1 arcsec |
position angle | 68 ° |
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 | |
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: 21h 40min 18.952sec | DEC: +50° 57' 39.1'' | ±0.014 arcsec |
position (J2000) | RA: 21h 42min 5.659sec | DEC: +51° 11' 22.97'' | |
proper motion B1950 (FK4) | RA: 0.0001 arcsec/a | DEC: 0.004 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: 0.0004 arcsec/a | DEC: 0.001 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 | B3 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | GC, catalogue number: 30391 |
Durchmusterung | BD+50 3410 |
Boss General Catalogue | 30391 |
Henry Draper Catalogue | 206672 |