HR 1978
catalogues and names
| catalogues and names | HR 1978, HD 38309, SAO 113099, BD +3 1025, WDS 05450+0400A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 45min 1.9sec | DEC: +4° 0' 29'' | ||
| position (B1900) | RA: 5h 39min 45.1sec | DEC: +3° 57' 57'' | ||
| proper motion (J2000) | RA: 0.02 arcsec/a | DEC: -0.019 arcsec/a | ||
| radial velocity | 8 km/s | |||
| rotational velocity | 82 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 201.57° | latitude: -12.81° | ||
magnitude
| visual magnitude | 6.09 (V on UBV Johnson system) |
spectral / color information
| spectral class | gF0n |
| B-V-magnitude | 0.31 |
| U-B-magnitude | 0.09 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 15.7 arcsec |
| mag difference (of double or brightest multiple) | 4.2 |
| component ID | AB |
| note (category: double and multiple data): | BC, 9.5, 13.0v, sep. 1.3" at 17" from A, optical. |
miscellaneous information
| note (category: group membership): | Ori OB1. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 45min 1.802sec | DEC: +4° 0' 29.32'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0006 arcsec/a | DEC: -0.018 arcsec/a | source: 25 | |
| radial velocity | 8 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 201.57° | latitude: -12.81° | ||
magnitude:
| visual | 6.09 (observed) | source: 25 |
| photovisual | 6.1 | source: 2 |
| photographic | 6.2 | source: 16 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | gF0n | source: 25 | |
| B-magnitude | 6.4 ±0.05 | B-V-magnitude | 0.31 |
| U-magnitude | 6.49 ±0.05 | U-B-magnitude | 0.09 |
double/multiple star system information:
| separation between brightest and second brightest component | 15.7 arcsec |
| magnitude difference between brightest and second brightest component | 2.6 |
| position angle | 150 ° |
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: 5h 42min 23.423sec | DEC: +3° 59' 18.96'' | ±0.038 arcsec |
| position (J2000) | RA: 5h 45min 1.888sec | DEC: +4° 0' 29.16'' | |
| proper motion B1950 (FK4) | RA: 0.0011 arcsec/a | DEC: -0.019 arcsec/a | ±0.007 arcsec/a in RA ±0.006 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0013 arcsec/a | DEC: -0.019 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F0 |
| 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: 7198 |
| Durchmusterung | BD+03 1025 |
| Boss General Catalogue | 7198 |
| Henry Draper Catalogue | 38309 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 45min | DEC: +4° 0' |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.021 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 | 1905 | 8 | 150° | 17.5'' | 6.09 | 8.7 | gF0n | STF 789 |
| 1958 | - | 15.7'' | ||||||
| BC | 1913 | 3 | 108° | 1.2'' | 8.7 | 12.2 | - | A 2655 |
| 1958 | 112° | 1.1'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF 789 | Struve, F.G.W. | - |
| A 2655 | Aitken, R.G. | - |
notes:
| note | Proper motion of B -005 +008. |