39 Eridani
catalogues and names
| catalogues and names | 39 Eri, HR 1318, HD 26846, SAO 149478, BD -10 867, WDS 04144-1015A |
| constellation | Eridanus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 4h 14min 23.7sec | DEC: -10° 15' 23'' | ||
| position (B1900) | RA: 4h 9min 38.2sec | DEC: -10° 30' 16'' | ||
| proper motion (J2000) | RA: -0.009 arcsec/a | DEC: -0.162 arcsec/a | ||
| radial velocity | 7 km/s | |||
| rotational velocity | <19 km/s | |||
| trigonometric parallax | 0.015 arcsec | |||
| galactic coordinates | longitude: 203.58° | latitude: -39.45° | ||
| note (category: dynamical parallaxes): | 0.016". |
magnitude
| visual magnitude | 4.87 (V on UBV Johnson system) |
spectral / color information
| spectral class | K3III |
| B-V-magnitude | 1.17 |
| U-B-magnitude | 1.15 |
| 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 | 6.4 arcsec |
| mag difference (of double or brightest multiple) | 3.7 |
| component ID | AB |
| note (category: double and multiple data): | AB binary, B is G2V. |
miscellaneous information
| note (category: group membership): | Wolf 630 group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 14min 23.71sec | DEC: -10° 15' 23.46'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0006 arcsec/a | DEC: -0.17 arcsec/a | source: 25 | |
| radial velocity | 7 km/s | source: 25 | ||
| trigonometric parallax | 0.015 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 203.58° | latitude: -39.45° | ||
magnitude:
| visual | 4.87 (observed) | source: 25 |
| photovisual | 4.2 | source: 16 |
| photographic | 6.1 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K3III | source: 25 | |
| B-magnitude | 6.04 ±0.05 | B-V-magnitude | 1.17 |
| U-magnitude | 7.19 ±0.05 | U-B-magnitude | 1.15 |
double/multiple star system information:
| separation between brightest and second brightest component | 6.4 arcsec |
| magnitude difference between brightest and second brightest component | 3 |
| position angle | 144 ° |
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 (B1950) | RA: 4h 12min 0.832sec | DEC: -10° 22' 44.97'' | ±0.013 arcsec |
| position (J2000) | RA: 4h 14min 23.684sec | DEC: -10° 15' 22.69'' | |
| proper motion B1950 (FK4) | RA: -0.001 arcsec/a | DEC: -0.162 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0006 arcsec/a | DEC: -0.162 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K0 |
| 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: 5114 |
| Durchmusterung | BD-10 867 |
| Boss General Catalogue | 5114 |
| Henry Draper Catalogue | 26846 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 4h 14.4min | DEC: -10° 15' |
| proper motion (J2000) | RA: -0.005 arcsec/a | DEC: -0.17 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 | 1831 | 54 | 154° | 6.3'' | 5.2 | 8.2 | K2III | STF 516 |
| 1991 | 144° | 6.4'' | ||||||
| AC | 1911 | 1 | 159° | 148.9'' | 5.1 | 9.7 | - | STF 516 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 516 | Struve, F.G.W. | - |
notes:
| note | 39 Eri. |