32 Eridani
catalogues and names
| catalogues and names | NSV 15841, 32 Eri, HR 1212, HD 24555, SAO 130806, BD -3 631 A, WDS 03543-0257A |
| constellation | Eridanus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 3h 54min 17,5sec | DEC: -2° 57' 17'' | ||
| position (2001,21) | RA: 3h 54min 22sec | DEC: -2° 57' 4'' | ||
| position (B1900) | RA: 3h 49min 16,1sec | DEC: -3° 15' 1'' | ||
| proper motion (J2000) | RA: 0,029 arcsec/a | DEC: 0,002 arcsec/a | ||
| radial velocity | 27 km/s note: spectroscopic binaries |
|||
| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0,004 arcsec | |||
| galactic coordinates | longitude: 192,1° | latitude: -40,1° | ||
| note (category: dynamical parallaxes): | 0.006". |
magnitude
| visual magnitude | 4,79 (V on UBV Johnson system) |
spectral / color information
| spectral class | G8III |
| B-V-magnitude | 0,94 |
| U-B-magnitude | 0,69 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 6,8 arcsec |
| mag difference (of double or brightest multiple) | 1,5 |
| component ID | AB |
| note (category: double and multiple data): | Binary with HR 1211. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 3h 54min 17,51sec | DEC: -2° 57' 16,7'' | ±0,76 arcsec | source: 18 |
| position (2001,21) | RA: 3h 54min 22sec | DEC: -2° 57' 4'' | JD: 2451987,37 | |
| proper motion (J2000) | RA: 0,0016 arcsec/a | DEC: 0,007 arcsec/a | source: 25 | |
| radial velocity | 27 km/s | source: 25 | ||
| trigonometric parallax | 0,004 arcsec | - | source: 25 | |
| galactic coord. (B1950) | longitude: 192,1° | latitude: -40,1° | ||
magnitude:
| visual | 4,79 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 5,7 | source: 2 |
spectral information:
| spectral class | G5 | source: 96 | |
| Morgan-Keenan | G8III | source: 25 | |
| B-magnitude | 5,73 ±0,05 | B-V-magnitude | 0,94 |
| U-magnitude | 6,42 ±0,05 | U-B-magnitude | 0,69 |
double/multiple star system information:
| separation between brightest and second brightest component | 6,8 arcsec |
| magnitude difference between brightest and second brightest component | 1,37 |
| position angle | 347 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,79 | G5 | 32 Eri, HR 1212, HD 24555, SAO 130806 |
| B | 6,14 | A2 | 32 Eri, HR 1211, HD 24554, SAO 130805 |
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 | |
| 18 | Hipparcos Input Catalog Version 2 Annex |
| Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 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 (B1950) | RA: 3h 51min 46,679sec | DEC: -3° 6' 4,36'' | ±0,02 arcsec |
| position (2001,21) | RA: 3h 54min 21sec | DEC: -2° 57' 4'' | JD: 2451987,37 |
| position (J2000) | RA: 3h 54min 17,517sec | DEC: -2° 57' 16,93'' | |
| proper motion B1950 (FK4) | RA: 0,0016 arcsec/a | DEC: 0,005 arcsec/a | ±0,003 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0019 arcsec/a | DEC: 0,002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | G5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 4706 |
| Durchmusterung | BD-03 631A |
| Boss General Catalogue | 4706 |
| Henry Draper Catalogue | 24555 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 3h 54,3min | DEC: -2° 57' |
| proper motion (J2000) | RA: 0,027 arcsec/a | DEC: 0,019 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 |
| AB | 1822 | 96 | 347° | 6,8'' | 4,77 | 6,14 | G8III A2V | STF 470 |
| AC | 1886 | 5 | 5° | 165,7'' | 4,76 | 11,6 | - | STF 470 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 470 | Struve, F.G.W. | - |
notes:
| note | 32 Eri. A is a spectroscopic binary. |