t2Aquarii
catalogues and names
| catalogues and names | t2Aqr, NSV 14329, 71 Aqr, HR 8679, HD 216032, SAO 165321, BD -14 6354, FK5: 861, WDS 22495-1335A |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Sometimes called Tau2 Aqr; usually without superscript. |
position, motion, parallax:
| position (J2000) | RA: 22h 49min 35.5sec | DEC: -13° 35' 33'' | ||
| position (B1900) | RA: 22h 44min 17.9sec | DEC: -14° 7' 14'' | ||
| proper motion (J2000) | RA: -0.012 arcsec/a | DEC: -0.038 arcsec/a | ||
| radial velocity | 1 km/s | |||
| trigonometric parallax | 0.021 arcsec | |||
| galactic coordinates | longitude: 52.27° | latitude: -58.52° | ||
magnitude
| visual magnitude | 4.01 (V on UBV Johnson system) |
spectral / color information
| spectral class | M0III |
| B-V-magnitude | 1.57 |
| U-B-magnitude | 1.95 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | 14329 |
double/multiple star system information
| separation | 132.5 arcsec |
| mag difference (of double or brightest multiple) | 4.5 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 22h 49min 35.506sec | DEC: -13° 35' 33.45'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.0008 arcsec/a | DEC: -0.038 arcsec/a | source: 25 | |
| radial velocity | 1 km/s | source: 25 | ||
| trigonometric parallax | 0.021 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 52.28° | latitude: -58.52° | ||
magnitude:
| visual | 4.01 (observed) | source: 25 |
| photovisual | 4.2 | source: 2 |
| photographic | 5.4 | source: 2 |
spectral information:
| spectral class | K5 | source: 96 | |
| Morgan-Keenan | M0III | source: 25 | |
| B-magnitude | 5.58 ±0.05 | B-V-magnitude | 1.57 |
| U-magnitude | 7.53 ±0.05 | U-B-magnitude | 1.95 |
double/multiple star system information:
| separation between brightest and second brightest component | 132.5 arcsec |
| magnitude difference between brightest and second brightest component | 5.8 |
| position angle | 293 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.01 | K5 | t2Aquarii, 71 Aqr, HR 8679, HD 216032, SAO 165321 |
| B | 9.34 | K2 |
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 | |
| 15 | FK5, FK5 Extension and FK5 Supplement |
| Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 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: 22h 46min 56.751sec | DEC: -13° 51' 25.17'' | ±0.005 arcsec |
| position (J2000) | RA: 22h 49min 35.511sec | DEC: -13° 35' 33.32'' | |
| proper motion B1950 (FK4) | RA: -0.001 arcsec/a | DEC: -0.033 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0008 arcsec/a | DEC: -0.036 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 861 |
| Durchmusterung | BD-14 6354 |
| Boss General Catalogue | 31836 |
| Henry Draper Catalogue | 216032 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 22h 46min 56.8sec | DEC: -13° 51' 25'' |
variability informations:
| magnitute at max. brightness | 3.98 |
| magnitute at min. brightness | 4.04 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | M0 |
references
| to a study | 1535D (designation: 1TAU AQR) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |