Maia
| catalogues and names | Maia, NSV 01279, 20 Tau, HR 1149, HD 23408, SAO 76155 |
| constellation | Taurus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Maia. |
position, motion, parallax:
| position (J2000) | RA: 3h 45min 49,6sec | DEC: +24° 22' 4'' |
| position (J1900) | RA: 3h 39min 52,4sec | DEC: +24° 3' 19'' |
| proper motion (J2000) | RA: 0,02 arcsec/a | DEC: -0,046 arcsec/a |
| radial velocity | 8 km/s note: spectroscopic binaries |
|
| rotational velocity | 39 km/s (uncertain) (variable) | |
magnitude
| visual magnitude | 3,87 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8III |
| B-V-magnitude | -0,07 |
| U-B-magnitude | -0,4 |
| R-I-magnitude | -0,06 |
| note (category: spectra): | C1 neutral carbon continuum shows discontinuities in UV. |
| note (category: colors): | Color excess E(B-V) = +0.02. |
variability information
| variable star identification | 1279 |
| note (category: variability): | Probably cst. Var. helium lines. |
double/multiple star system information
| separation | 0 arcsec |
| mag difference (of double or brightest multiple) | 0 |
| note | doublicity discoverd by occultation |
| note (category: double and multiple data): | Sep. 0.003". Unresolved by speckle interferometry 1981.69. Duplicity questioned. |
miscellaneous information
| note (category: group membership): | Pleiades cluster; Mel 22 #785; in reflection nebula. Pleiades nebula. Member assoc. Tau R1 at 110 pc. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 3h 45min 49,566sec | DEC: +24° 22' 3,63'' | ±0,43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0005 arcsec/a | DEC: -0,05 arcsec/a | source: 25 | |
| radial velocity | 8 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 166,18° | latitude: -23,51° | ||
| GCI unit vector (J2000) | X: 0,503345 | Y: 0,759219 | Z: 0,412591 | |
magnitude:
| visual | 3,87 (observed) | source: 25 |
| photovisual | 4 | source: 2 |
| photographic | 3,9 | source: 16 |
spectral information:
| spectral class | B5 | source: 96 | |
| Morgan-Keenan | B8III | source: 25 | |
| B-magnitude | 3,8 ±0,05 | B-V-magnitude | -0,07 |
| U-magnitude | 3,4 ±0,05 | U-B-magnitude | -0,4 |
double/multiple star system information:
| separation between brightest and second brightest component | 0 arcsec |
| magnitude difference between brightest and second brightest component | 0 |
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 (J1950) | RA: 3h 42min 50,756sec | DEC: +24° 12' 47,01'' | ±0,016 arcsec |
| position (J2000) | RA: 3h 45min 49,595sec | DEC: +24° 22' 3,85'' | |
| proper motion J1950 (FK4) | RA: 0,0015 arcsec/a | DEC: -0,043 arcsec/a | ±0,003 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0014 arcsec/a | DEC: -0,046 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 | B5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 4500 |
| Durchmusterung | BD+23 516 |
| Boss General Catalogue | 4500 |
| Henry Draper Catalogue | 23408 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 3h 42min 50,8sec | DEC: +24° 12' 47'' |
variability informations:
| variability type | - |
| magnitute at max. brightness | 3,87 |
| magnitute at min. brightness | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B7 |
references
| to a study | 2058D (designation: MAIA) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |