NSV 02770
catalogues and names
| catalogues and names | NSV 02770, HR 2113, HD 40657, SAO 132732, BD -3 1256, FK5: 2457 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 6h 0min 3.4sec | DEC: -3° 4' 27'' | ||
| position (B1900) | RA: 5h 55min 3.1sec | DEC: -3° 4' 41'' | ||
| proper motion (J2000) | RA: 0.012 arcsec/a | DEC: -0.076 arcsec/a | ||
| radial velocity | 26 km/s | |||
| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.022 arcsec | |||
| galactic coordinates | longitude: 209.79° | latitude: -12.83° | ||
magnitude
| visual magnitude | 4.53 (V on UBV Johnson system) |
spectral / color information
| spectral class | K1.5IIIFe-1.5 |
| B-V-magnitude | 1.22 |
| U-B-magnitude | 1.21 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | 2770 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 6h 0min 3.35sec | DEC: -3° 4' 27.32'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0006 arcsec/a | DEC: -0.073 arcsec/a | source: 25 | |
| radial velocity | 26 km/s | source: 25 | ||
| trigonometric parallax | 0.022 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 209.79° | latitude: -12.83° | ||
magnitude:
| visual | 4.53 (observed) | source: 25 |
| photovisual | 4.7 | source: 2 |
| photographic | 5.7 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K1.5IIIFe-1.5 | source: 25 | |
| B-magnitude | 5.75 ±0.05 | B-V-magnitude | 1.22 |
| U-magnitude | 6.96 ±0.05 | U-B-magnitude | 1.21 |
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: 5h 57min 33.162sec | DEC: -3° 4' 28.77'' | ±0.026 arcsec |
| position (J2000) | RA: 6h 0min 3.345sec | DEC: -3° 4' 27.05'' | |
| proper motion B1950 (FK4) | RA: 0.0003 arcsec/a | DEC: -0.071 arcsec/a | ±0.005 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0006 arcsec/a | DEC: -0.071 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.7 (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: 7587 |
| Durchmusterung | BD-03 1256 |
| Boss General Catalogue | 7587 |
| Henry Draper Catalogue | 40657 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 5h 57min 33.2sec | DEC: -3° 4' 29'' |
variability informations:
| magnitute at max. brightness | 4.54 |
| magnitute at min. brightness | 4.58 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K2 |
references
| to a study | 0807D (designation: 161G ORI) |