y Capricorni
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 | y Cap, 16 Cap, HR 7936, HD 197692, SAO 189664, CD -25 15018, FK5: 779 |
constellation | Capricornus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
position (J2000) | RA: 20h 46min 5.7sec | DEC: -25° 16' 15'' | ||
position (B1900) | RA: 20h 40min 10.5sec | DEC: -25° 37' 49'' | ||
proper motion (J2000) | RA: -0.05 arcsec/a | DEC: -0.157 arcsec/a | ||
radial velocity | 26 km/s note: variable radial velocity |
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rotational velocity | 37 km/s (uncertain) (variable) | |||
trigonometric parallax | 0.098 arcsec | |||
galactic coordinates | longitude: 20.01° | latitude: -35.5° |
magnitude
visual magnitude | 4.14 (V on UBV Johnson system) |
spectral / color information
spectral class | F4V |
B-V-magnitude | 0.43 |
U-B-magnitude | 0.02 |
R-I-magnitude |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 20h 46min 5.742sec | DEC: -25° 16' 15.28'' | ±0.06 arcsec | source: 15 |
proper motion (J2000) | RA: -0.0037 arcsec/a | DEC: -0.157 arcsec/a | source: 25 | |
radial velocity | 26 km/s | source: 25 | ||
trigonometric parallax | 0.098 arcsec | ±0.01 arcsec | source: 25 | |
galactic coord. (B1950) | longitude: 20.01° | latitude: -35.5° |
magnitude:
visual | 4.14 (observed) | source: 25 |
photovisual | 4.3 | source: 2 |
photographic | 4.8 | source: 2 |
spectral information:
spectral class | F8 | source: 96 | |
Morgan-Keenan | F4V | source: 25 | |
B-magnitude | 4.57 ±0.05 | B-V-magnitude | 0.43 |
U-magnitude | 4.59 ±0.05 | U-B-magnitude | 0.02 |
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 | |
15 | FK5, FK5 Extension and FK5 Supplement |
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991 | |
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 (B1950) | RA: 20h 43min 8.301sec | DEC: -25° 27' 7.14'' | ±0.006 arcsec |
position (J2000) | RA: 20h 46min 5.746sec | DEC: -25° 16' 15.4'' | |
proper motion B1950 (FK4) | RA: -0.0036 arcsec/a | DEC: -0.156 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0.0036 arcsec/a | DEC: -0.158 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 4.3 (accuracy: 2 decimals) |
source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
spectral class | F8 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | FK4, catalogue number: 779 |
Durchmusterung | CD-2515018 |
Boss General Catalogue | 28929 |
Henry Draper Catalogue | 197692 |