y Eridani
| 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 Eri, NSV 16224, 65 Eri, HR 1617, HD 32249, SAO 131700, BD -7 948 |
| constellation | Eridanus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 1min 26.3sec | DEC: -7° 10' 26'' | ||
| position (B1900) | RA: 4h 56min 35.4sec | DEC: -7° 19' 14'' | ||
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: 0.008 arcsec/a | ||
| radial velocity | 25 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 74 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 206.59° | latitude: -27.69° | ||
magnitude
| visual magnitude | 4.81 (V on UBV Johnson system) |
spectral / color information
| spectral class | B3V |
| B-V-magnitude | -0.19 |
| U-B-magnitude | -0.74 |
| R-I-magnitude |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 1min 26.307sec | DEC: -7° 10' 26.35'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0009 arcsec/a | DEC: 0.009 arcsec/a | source: 25 | |
| radial velocity | 25 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 206.6° | latitude: -27.69° | ||
magnitude:
| visual | 4.81 (observed) | source: 25 |
| photovisual | 5 | source: 16 |
| photographic | 4.8 | source: 2 |
spectral information:
| spectral class | B8 | source: 96 | |
| Morgan-Keenan | B3V | source: 25 | |
| B-magnitude | 4.62 ±0.05 | B-V-magnitude | -0.19 |
| U-magnitude | 3.88 ±0.05 | U-B-magnitude | -0.74 |
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 | |
| 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 59min 0.759sec | DEC: -7° 14' 44.98'' | ±0.019 arcsec |
| position (J2000) | RA: 5h 1min 26.347sec | DEC: -7° 10' 26.08'' | |
| proper motion B1950 (FK4) | RA: -0.0002 arcsec/a | DEC: 0.008 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0002 arcsec/a | DEC: 0.008 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 | B8 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 6138 |
| Durchmusterung | BD-07 948 |
| Boss General Catalogue | 6138 |
| Henry Draper Catalogue | 32249 |