88 Tauri
catalogues and names
| catalogues and names | NSV 01658, 88 Tau, HR 1458, HD 29140, SAO 94026, BD +9 607, WDS 04357+1010A |
| constellation | Taurus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 4h 35min 39.3sec | DEC: +10° 9' 39'' | ||
| position (B1900) | RA: 4h 30min 9.5sec | DEC: +9° 57' 20'' | ||
| proper motion (J2000) | RA: 0.055 arcsec/a | DEC: -0.046 arcsec/a | ||
| radial velocity | 29 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
|||
| rotational velocity | 35 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.036 arcsec | |||
| galactic coordinates | longitude: 186.4° | latitude: -24.13° | ||
magnitude
| visual magnitude | 4.25 (V on UBV Johnson system) |
spectral / color information
| spectral class | A5m |
| B-V-magnitude | 0.18 |
| U-B-magnitude | 0.11 |
| R-I-magnitude |
| note (category: spectra): | Also classified A6-7III-IVmw. |
variability information
| variable star identification | 1658 |
| note (category: variability): | ADS 3317A, E?, 4.23 - 4.30V. |
double/multiple star system information
| separation | 69.7 arcsec |
| mag difference (of double or brightest multiple) | 3.6 |
| note (category: double and multiple data): | CPM. Companion 7.84V, +0.54(B-V), +0.04(U-B), F8V. vsini =<25k/s. |
| note (category: spectroscopic binaries): | ADS 3317A, 3.57124d, K 76.3k/s, V0 +28.7k/s, asini 3.75. |
miscellaneous information
| note (category: group membership): | Hyades group. |
| note (category: stellar radii or diameters): | Diam. relative to Sun = 2.2. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 35min 39.255sec | DEC: +10° 9' 39.08'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0034 arcsec/a | DEC: -0.047 arcsec/a | source: 25 | |
| radial velocity | 29 km/s | source: 25 | ||
| trigonometric parallax | 0.036 arcsec | ±0.004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 186.41° | latitude: -24.13° | ||
magnitude:
| visual | 4.25 (observed) | source: 25 |
| photovisual | 4.4 | source: 2 |
| photographic | 4.5 | source: 16 |
spectral information:
| spectral class | A3 | source: 96 | |
| Morgan-Keenan | A5m | source: 25 | |
| B-magnitude | 4.43 ±0.05 | B-V-magnitude | 0.18 |
| U-magnitude | 4.54 ±0.05 | U-B-magnitude | 0.11 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.2 arcsec |
| position angle | 330 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.25 | A3 | 88 Tau, HR 1458, HD 29140, SAO 94026 |
| B | 7.83 | G0 |
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: 4h 32min 54.25sec | DEC: +10° 3' 35.26'' | ±0.022 arcsec |
| position (J2000) | RA: 4h 35min 39.269sec | DEC: +10° 9' 39.12'' | |
| proper motion B1950 (FK4) | RA: 0.0036 arcsec/a | DEC: -0.044 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0037 arcsec/a | DEC: -0.046 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A3 |
| 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: 5599 |
| Durchmusterung | BD+09 607 |
| Boss General Catalogue | 5599 |
| Henry Draper Catalogue | 29140 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 4h 35.7min | DEC: +10° 10' |
| proper motion (J2000) | RA: 0.051 arcsec/a | DEC: -0.047 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 | 11 | 196° | 0.1'' | 4.25 | - | A5m | CHR 18 |
| 1991 | 330° | 0.2'' | ||||||
| Aa-B | 1822 | 10 | 299° | 69.7'' | 4.25 | 7.82 | - | SHJ 45 |
discoverer information:
| discoverer code | discoverer | reference |
| CHR 18 | - | - |
| SHJ 45 | South & Herschel | - |
notes:
| note | 88 Tau. A is an Alpha CVn-type variable, and spectro- scopic binary, now resolved by speckle interferometry. B is BD+09@606, with proper motion +053 -048. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 4h 32min 54.3sec | DEC: +10° 3' 35'' |
variability informations:
| variability type | E: | close binary eclipsing system |
| magnitute at max. brightness | 4.23 | |
| magnitute at min. brightness | 4.3 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | AM |
references
| to a study | 131450D (designation: 88 TAU) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |
variability type description
| variability type | description |
| E |
Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion. EA Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes. EB Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V. EW W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later. |