y Pegasi
catalogues and names
| catalogues and names | y Peg, NSV 14777, 84 Peg, HR 9064, HD 224427, SAO 91611, BD +24 4865, FK5: 1629, WDS 23578+2508 |
| constellation | Pegasus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 57min 45.5sec | DEC: +25° 8' 29'' | ||
| position (B1900) | RA: 23h 52min 39.7sec | DEC: +24° 35' 8'' | ||
| proper motion (J2000) | RA: -0.034 arcsec/a | DEC: -0.033 arcsec/a | ||
| radial velocity | -4 km/s note: suspected variable radial velocity |
|||
| trigonometric parallax | 0.005 arcsec | |||
| galactic coordinates | longitude: 107.85° | latitude: -36.15° | ||
magnitude
| visual magnitude | 4.66 (V on UBV Johnson system) |
spectral / color information
| spectral class | M3III |
| B-V-magnitude | 1.59 |
| U-B-magnitude | 1.68 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | 14777 |
| note (category: variability): | 4.63 - 4.69V. |
miscellaneous information
| note (category: group membership): | UMa stream. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 57min 45.535sec | DEC: +25° 8' 28.98'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.0025 arcsec/a | DEC: -0.033 arcsec/a | source: 25 | |
| radial velocity | -4 km/s | source: 25 | ||
| trigonometric parallax | 0.005 arcsec | - | source: 25 | |
| galactic coord. (B1950) | longitude: 107.86° | latitude: -36.15° | ||
magnitude:
| visual | 4.66 (observed) | source: 25 |
| photovisual | 4.8 | source: 2 |
spectral information:
| spectral class | M0 | source: 96 | |
| Morgan-Keenan | M3III | source: 25 | |
| B-magnitude | 6.25 ±0.05 | B-V-magnitude | 1.59 |
| U-magnitude | 7.93 ±0.05 | U-B-magnitude | 1.68 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.1 arcsec |
| position angle | 63 ° |
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 55min 12.376sec | DEC: +24° 51' 48.72'' | ±0.005 arcsec |
| position (J2000) | RA: 23h 57min 45.54sec | DEC: +25° 8' 29.07'' | |
| proper motion B1950 (FK4) | RA: -0.0024 arcsec/a | DEC: -0.027 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0024 arcsec/a | DEC: -0.033 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.8 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | M0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1629 |
| Durchmusterung | BD+24 4865 |
| Boss General Catalogue | 33230 |
| Henry Draper Catalogue | 224427 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 57.8min | DEC: +25° 8' |
| proper motion (J2000) | RA: -0.034 arcsec/a | DEC: -0.033 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 |
| - | 1980 | 2 | 54° | 0.2'' | 4.66 | - | M3III | MCA 76 |
| 1988 | 63° | 0.1'' |
discoverer information:
| discoverer code | discoverer | reference |
| MCA 76 | McAlister, H.A. | - |
notes:
| note | Psi Peg. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 23h 55min 12.4sec | DEC: +24° 51' 49'' |
variability informations:
| magnitute at max. brightness | 4.63 |
| magnitute at min. brightness | 4.69 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | M3 |
references
| to a study | 300015D (designation: HR 9064) |