HR 644
| 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 | HR 644, HD 13522, SAO 75203, BD +23 297 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 12min 37.5sec | DEC: +24° 10' 4'' | ||
| position (B1900) | RA: 2h 6min 58sec | DEC: +23° 41' 53'' | ||
| proper motion (J2000) | RA: 0.041 arcsec/a | DEC: -0.006 arcsec/a | ||
| radial velocity | -1 km/s | |||
| galactic coordinates | longitude: 145.69° | latitude: -35.09° | ||
magnitude
| visual magnitude | 5.96 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0 |
| B-V-magnitude | 1.37 |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 12min 37.558sec | DEC: +24° 10' 3.64'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0033 arcsec/a | DEC: -0.009 arcsec/a | source: 25 | |
| radial velocity | -1 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 145.69° | latitude: -35.09° | ||
magnitude:
| visual | 5.96 (observed) | source: 25 |
| photovisual | 6.2 | source: 2 |
| photographic | 7.3 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| B-magnitude | 7.33 ±0.05 | B-V-magnitude | 1.37 |
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: 2h 9min 47.478sec | DEC: +23° 56' 1.7'' | ±0.045 arcsec |
| position (J2000) | RA: 2h 12min 37.531sec | DEC: +24° 10' 3.68'' | |
| proper motion B1950 (FK4) | RA: 0.003 arcsec/a | DEC: -0.002 arcsec/a | ±0.008 arcsec/a in RA ±0.007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.003 arcsec/a | DEC: -0.007 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.2 (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. |
catalogues
| source catalogue | GC, catalogue number: 2638 |
| Durchmusterung | BD+23 297 |
| Boss General Catalogue | 2638 |
| Henry Draper Catalogue | 13522 |