Fornacis
| catalogues and names | Fornacis, a For, HR 963, HD 20010, SAO 168373, WDS 03121-2859 |
| constellation | Fornax |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Fornacis; 12 Eri in For. |
position, motion, parallax:
| position (J2000) | RA: 3h 12min 4,3sec | DEC: -28° 59' 13'' |
| position (J1900) | RA: 3h 7min 49,3sec | DEC: -29° 22' 52'' |
| proper motion (J2000) | RA: 0,339 arcsec/a | DEC: 0,64 arcsec/a |
| radial velocity | -21 km/s | |
| rotational velocity | 0 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,075 arcsec | |
| note (category: dynamical parallaxes): | 0.070". |
magnitude
| visual magnitude | 3,87 (V on UBV Johnson system) |
spectral / color information
| spectral class | F8V |
| B-V-magnitude | 0,52 |
| U-B-magnitude | 0,02 |
| R-I-magnitude | 0,31 |
variability information
| variable star identification | 1074 |
| note (category: variability): | ADS 2402B, 7.0 - 9.03v. |
double/multiple star system information
| separation | 3,6 arcsec |
| mag difference (of double or brightest multiple) | 2,7 |
| note (category: double and multiple data): | 3.9 F8IV, 6.5 G7V, 314y, a = 4.367". Combined mag., colors. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 3h 12min 4,474sec | DEC: -28° 59' 14,5'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0285 arcsec/a | DEC: 0,62 arcsec/a | source: 25 | |
| radial velocity | -21 km/s | source: 25 | ||
| trigonometric parallax | 0,075 | ±0,007 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 224,74° | latitude: -59,04° | ||
| GCI unit vector (J2000) | X: 0,585095 | Y: 0,650239 | Z: -0,484617 | |
magnitude:
| visual | 3,87 (observed) | source: 25 |
| photovisual | 4 | source: 2 |
| photographic | 4,5 | source: 2 |
spectral information:
| spectral class | F8 | source: 96 | |
| Morgan-Keenan | F8V | source: 25 | |
| B-magnitude | 4,39 ±0,05 | B-V-magnitude | 0,52 |
| U-magnitude | 4,41 ±0,05 | U-B-magnitude | 0,02 |
variability information:
| variability type | 9 |
| var. amplitude | 2 |
double/multiple star system information:
| separation between brightest and second brightest component | 4,4 arcsec |
| position angle | 299 ° |
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: 3h 9min 56,75sec | DEC: -29° 10' 59,42'' | ±0,014 arcsec |
| position (J2000) | RA: 3h 12min 4,268sec | DEC: -28° 59' 13,36'' | |
| proper motion J1950 (FK4) | RA: 0,0254 arcsec/a | DEC: 0,644 arcsec/a | ±0,002 arcsec/a in RA ±0,003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0259 arcsec/a | DEC: 0,64 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4 (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 HD with M stars reclassified by Miss Cannon. |
catalogues
| source catalogue | FK3, catalogue number: 117 |
| Durchmusterung | CD-29 1177 |
| Boss General Catalogue | 3831 |
| Henry Draper Catalogue | 20010 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 3h 12,1min | DEC: -28° 59' |
| proper motion (J2000) | RA: 0,374 arcsec/a | DEC: 0,642 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 | 81 | 310° | 5,3'' | 4 | - | F8V | HJ 3555 |
| 1994 | 299° | 4,4'' |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 3555 | Herschel, J. | - |
notes:
| note | Alpha For. P = 314yr., a = 4.37", motion direct. B is probably variable. |