q1Tauri
| catalogues and names | q1Tau, NSV 16016, 77 Tau, HR 1411, HD 28307, SAO 93955, WDS 04287+1552B |
| constellation | Taurus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 4h 28min 34,5sec | DEC: +15° 57' 44'' |
| position (J1900) | RA: 4h 22min 51,6sec | DEC: +15° 44' 25'' |
| proper motion (J2000) | RA: 0,103 arcsec/a | DEC: -0,027 arcsec/a |
| radial velocity | 40 km/s note: spectroscopic binaries, single lined spectra |
|
| rotational velocity | =<8 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,038 arcsec | |
magnitude
| visual magnitude | 3,84 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0IIIbFe-0.5 |
| B-V-magnitude | 0,95 |
| U-B-magnitude | 0,73 |
| R-I-magnitude | 0,47 |
| note (category: colors): | Color excess E(B-V) = +0.09. |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 337,4 arcsec |
| mag difference (of double or brightest multiple) | 0,4 |
| component ID | AB |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | CPM with HR 1412. Not clear if there are one or two occultation companions: mag. diff 3.8v, sep. 0.082", another possible mag. diff 8v, sep. 0.2". |
| note (category: spectroscopic binaries): | 6000 or 3000d. Unresolved by speckle interferometry 1983.93. |
miscellaneous information
| note (category: group membership): | In Hyades cluster; Mel 25 #71. |
| note (category: stellar radii or diameters): | Diam. 0.0026". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 28min 34,477sec | DEC: +15° 57' 43,46'' | ±0,2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0,0069 arcsec/a | DEC: -0,032 arcsec/a | source: 25 | |
| radial velocity | 40 km/s | source: 25 | ||
| trigonometric parallax | 0,038 | ±0,004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 180,26° | latitude: -21,97° | ||
| GCI unit vector (J2000) | X: 0,373446 | Y: 0,885953 | Z: 0,275001 | |
magnitude:
| visual | 3,84 (observed) | source: 25 |
| photovisual | 4 | source: 2 |
| photographic | 5 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | G9IIIFe-0.5 | source: 25 | |
| B-magnitude | 4,79 ±0,05 | B-V-magnitude | 0,95 |
| U-magnitude | 5,52 ±0,05 | U-B-magnitude | 0,73 |
double/multiple star system information:
| separation between brightest and second brightest component | 0,2 arcsec |
| position angle | 348 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 3,4 | F0 | q2Tauri, 78 Tau, HR 1412, HD 28319, SAO 93957 |
| B | 3,84 | K0 | q1Tauri, 77 Tau, HR 1411, HD 28307, SAO 93955 |
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 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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 (J1950) | RA: 4h 25min 42,882sec | DEC: +15° 51' 10,15'' | ±0,014 arcsec |
| position (J2000) | RA: 4h 28min 34,479sec | DEC: +15° 57' 43,83'' | |
| proper motion J1950 (FK4) | RA: 0,0071 arcsec/a | DEC: -0,026 arcsec/a | ±0,003 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0071 arcsec/a | DEC: -0,027 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4 (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: 5433 |
| Durchmusterung | BD+15 631 |
| Boss General Catalogue | 5433 |
| Henry Draper Catalogue | 28307 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 4h 28,7min | DEC: +15° 52' |
| proper motion (J2000) | RA: 0,108 arcsec/a | DEC: -0,025 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 |
| - | 1836 | 8 | 346° | 337,4'' | 3,4 | - | A7III | STF 10 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 10 | Struve, F.G.W. | - |
notes:
| note | Theta (2) Tau. B is BD+15@631. Proper motion of B +082 -026. A spectroscopic and occultation binary. Also, variable, probably of Delta Scuti type. |