HR 7307
catalogues and names
| catalogues and names | HR 7307, HD 180555, SAO 104668, BD +14 3852, WDS 19164+1433 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 19h 16min 26.8sec | DEC: +14° 32' 41'' | ||
| position (B1900) | RA: 19h 11min 52sec | DEC: +14° 22' 3'' | ||
| proper motion (J2000) | RA: 0.01 arcsec/a | DEC: 0.009 arcsec/a | ||
| radial velocity | -19 km/s note: suspected variable radial velocity |
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| rotational velocity | 147 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.021 arcsec | |||
| galactic coordinates | longitude: 48.69° | latitude: 1.19° | ||
magnitude
| visual magnitude | 5.63 (V on UBV Johnson system) |
spectral / color information
| spectral class | B9.5V |
| B-V-magnitude | -0.02 |
| U-B-magnitude | -0.16 |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 8.2 arcsec |
| mag difference (of double or brightest multiple) | 3.8 |
| component ID | AB |
| note (category: double and multiple data): | AB CPM, B is 9.07V, +0.14(B-V), -0.05(U-B), F8V or G0IV, optical? Speckle interferometry indicates a fourth companion at 0.051" from A. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 19h 16min 26.792sec | DEC: +14° 32' 40.66'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0006 arcsec/a | DEC: 0.004 arcsec/a | source: 25 | |
| radial velocity | -19 km/s | source: 25 | ||
| trigonometric parallax | 0.021 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 48.7° | latitude: 1.19° | ||
magnitude:
| visual | 5.63 (observed) | source: 25 |
| photovisual | 5.5 | source: 2 |
| photographic | 5.5 | source: 16 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | B9.5V | source: 25 | |
| B-magnitude | 5.61 ±0.05 | B-V-magnitude | -0.02 |
| U-magnitude | 5.45 ±0.05 | U-B-magnitude | -0.16 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.1 arcsec |
| position angle | 58 ° |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
| 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: 19h 14min 9.339sec | DEC: +14° 27' 17.34'' | ±0.026 arcsec |
| position (J2000) | RA: 19h 16min 26.802sec | DEC: +14° 32' 41.22'' | |
| proper motion B1950 (FK4) | RA: 0.0006 arcsec/a | DEC: 0.01 arcsec/a | ±0.005 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0007 arcsec/a | DEC: 0.009 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A0 |
| 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: 26572 |
| Durchmusterung | BD+14 3852 |
| Boss General Catalogue | 26572 |
| Henry Draper Catalogue | 180555 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 19h 16.4min | DEC: +14° 33' |
| proper motion (J2000) | RA: 0.009 arcsec/a | DEC: 0.004 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 |
| Aa | 1985 | 2 | 54° | 0.1'' | 5.68 | - | B9.5V | CHR 85 |
| 1991 | 58° | - | ||||||
| Aa-B | 1828 | 19 | 349° | 8.2'' | 5.68 | 9.28 | - | STF2489 |
| 1973 | 346° | - |
discoverer information:
| discoverer code | discoverer | reference |
| CHR 85 | - | - |
| STF2489 | Struve, F.G.W. | - |