y Andromedae
catalogues and names
| catalogues and names | y And, 20 And, HR 9003, HD 223047, SAO 53355, BD +45 4321, FK5: 1622, WDS 23460+4625A |
| constellation | Andromeda |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 46min 2.1sec | DEC: +46° 25' 13'' | ||
| position (B1900) | RA: 23h 41min 4.5sec | DEC: +45° 51' 54'' | ||
| proper motion (J2000) | RA: 0.011 arcsec/a | DEC: -0.005 arcsec/a | ||
| radial velocity | -25 km/s note: variable radial velocity |
|||
| rotational velocity | <19 km/s | |||
| trigonometric parallax | 0.001 arcsec | |||
| galactic coordinates | longitude: 111.34° | latitude: -14.97° | ||
magnitude
| visual magnitude | 4.95 (V on UBV Johnson system) |
spectral / color information
| spectral class | G5Ib+A0V |
| B-V-magnitude | 1.11 |
| U-B-magnitude | 0.82 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 184 arcsec |
| mag difference (of double or brightest multiple) | 4 |
| component ID | AD |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Component A has composite spectrum but star unresolved by interferometer. vsini of G5 component <19:k/s, A0 component =<50k/s. Component B, 14.6v at 25"; C, 13.1v at 62". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 46min 2.058sec | DEC: +46° 25' 13.1'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.001 arcsec/a | DEC: -0.005 arcsec/a | source: 25 | |
| radial velocity | -25 km/s | source: 25 | ||
| trigonometric parallax | 0.001 arcsec | - | source: 25 | |
| galactic coord. (B1950) | longitude: 111.35° | latitude: -14.97° | ||
magnitude:
| visual | 4.99 (observed) | source: 25 |
| photovisual | 5.1 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | G3Ib-II | source: 25 | |
| B-magnitude | 6.1 ±0.5 | B-V-magnitude | 1.11 |
| U-magnitude | 6.91 ±0.5 | U-B-magnitude | 0.81 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.3 arcsec |
| position angle | 102 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.99 | K0 | y Andromedae, 20 And, HR 9003, HD 223047, SAO 53355 |
| B | 9.25 | K0 |
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: 23h 43min 32.875sec | DEC: +46° 8' 33.55'' | ±0.004 arcsec |
| position (J2000) | RA: 23h 46min 2.062sec | DEC: +46° 25' 13.11'' | |
| proper motion B1950 (FK4) | RA: 0.0009 arcsec/a | DEC: 0 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0011 arcsec/a | DEC: -0.005 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | +++ |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1622 |
| Durchmusterung | BD+45 4321 |
| Boss General Catalogue | 32988 |
| Henry Draper Catalogue | 223047 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 46min | DEC: +46° 25' |
| proper motion (J2000) | RA: 0.011 arcsec/a | DEC: -0.005 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 | 1976 | 21 | 108° | 0.3'' | 4.95 | - | G5Ib+A0V | MCA 75 |
| 1991 | 102° | - | ||||||
| Ab | 1981 | 2 | 180° | 0.1'' | 5 | - | - | MCA 75 |
| 1991 | 172° | - | ||||||
| Aa-B | 1908 | 1 | 218° | 24.8'' | 5.1 | 14.6 | - | BU 1532 |
| Aa-C | 1908 | 1 | 17° | 62'' | 5.1 | 13.1 | - | BU 1532 |
| Aa-D | 1879 | 3 | 152° | 184'' | 5.1 | 9.1 | K0 | BU 1532 |
discoverer information:
| discoverer code | discoverer | reference |
| MCA 75 | McAlister, H.A. | - |
| BU 1532 | Burnham, S.W. | - |
notes:
| note | Psi And. R. H. Wilson reported a wide, faint companion. H. McAlister resolved the primary into a triple system. |