Matar
| catalogues and names | Matar, h Peg, NSV 14285, 44 Peg, HR 8650, HD 215182, SAO 90734, FK5: 857, WDS 22430+3013A |
| constellation | Pegasus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Matar. |
position, motion, parallax:
| position (J2000) | RA: 22h 43min 0,1sec | DEC: +30° 13' 17'' |
| position (J1900) | RA: 22h 38min 18,8sec | DEC: +29° 41' 53'' |
| proper motion (J2000) | RA: 0,015 arcsec/a | DEC: -0,025 arcsec/a |
| radial velocity | 4 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible |
|
| rotational velocity | 9 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,017 arcsec | |
magnitude
| visual magnitude | 2,94 (V on UBV Johnson system) |
spectral / color information
| spectral class | G2II-III+F0V |
| B-V-magnitude | 0,86 |
| U-B-magnitude | 0,55 |
| R-I-magnitude | 0,48 |
variability information
| variable star identification | 14285 |
| note (category: variability): | ADS 16211A. |
double/multiple star system information
| number of components of multiple star system | 6 |
| separation | 90,4 arcsec |
| mag difference (of double or brightest multiple) | 5,1 |
| component ID | AxBC |
| note (category: double and multiple data): | A* 2.94 G2II-III, 2.23y, a = 0.022". Speckle interferometry measures range from unresolved to sep. 0.059". BC, 10.0, 10.0v sep. 0.2" at 90" from A, physical. |
| note (category: spectroscopic binaries): | ADS 16211A, 818.0d, K 14.2k/s, V0 +4.3k/s, asini 158, vsini of G8 component 9k/s, F0 component =<50k/s. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 22h 43min 0,143sec | DEC: +30° 13' 16,52'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0011 arcsec/a | DEC: -0,025 arcsec/a | source: 25 | |
| radial velocity | 4 km/s | source: 25 | ||
| trigonometric parallax | 0,017 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 92,5° | latitude: -24,95° | ||
| GCI unit vector (J2000) | X: 0,815779 | Y: -0,284873 | Z: 0,503341 | |
magnitude:
| visual | 2,94 (observed) | source: 25 |
| photovisual | 3,1 | source: 2 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G2II-III | source: 25 | |
| B-magnitude | 3,8 ±0,05 | B-V-magnitude | 0,86 |
| U-magnitude | 4,35 ±0,05 | U-B-magnitude | 0,55 |
double/multiple star system information:
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 2,94 | G0 | Matar, h Pegasi, 44 Peg, HR 8650, HD 215182, SAO 90734 |
| B | 9,96 | G5 |
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 (J1950) | RA: 22h 40min 39,264sec | DEC: +29° 57' 33,42'' | ±0,004 arcsec |
| position (J2000) | RA: 22h 43min 0,139sec | DEC: +30° 13' 16,49'' | |
| proper motion J1950 (FK4) | RA: 0,001 arcsec/a | DEC: -0,021 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0011 arcsec/a | DEC: -0,026 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | G0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 857 |
| Durchmusterung | BD+29 4741 |
| Boss General Catalogue | 31706 |
| Henry Draper Catalogue | 215182 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 22h 43min | DEC: +30° 13' |
| proper motion (J2000) | RA: 0,015 arcsec/a | DEC: -0,025 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 | 1975 | 5 | ° | '' | 3 | - | - | BLA |
| Aa-BC | 1824 | 13 | 339° | 90,4'' | 3 | 10,3 | - | BU 1144 |
| BC | 1889 | 18 | 83° | 0,2'' | 10,1 | 10,1 | - | BU 1144 |
| BC-D | 1916 | 1 | 320° | 62,9'' | 10,3 | 14 | - | BU 1144 |
| DE | 1916 | 1 | 181° | 5,7'' | 14 | 16 | - | BU 1144 |
discoverer information:
| discoverer code | discoverer | reference |
| BLA | Blazit, A. et al | |
| BU 1144 | Burnham, S.W. | - |
notes:
| note | Eta Peg. A spectroscopic binary resolved by speckle interferometry. Spectrum of Aa composite; G2II-III+F0IV. Hence a quadruple system. Aa-BC: B is BD+29@4740. Proper motion of B -005 -006. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (J1900) | RA: 22h 38,3min | DEC: +29° 42' |
magnitudes, spectral classes, orbital elements:
| author: | P. van de Kamp |
| date of observation: | 1950 |
| magnitude of component A: | 2,94 |
| magnitude of component B: | 2,94 |
| spectral class component B: | G2II- |
| spectral class component B: | G2II- |
| period [y]: | 2,23 |
| semi-major axis [arcsec]: | 0,022 |
| inclination [deg]: | 77 |
| node [deg]: | 24 |
| eccentricity: | 0,15 |
| time of periastron passage: | 1900,74 |
| reference: | Astron. J. 62, 393; 1957. |
| notes | The elements P, T, e in the astrometric solution have been taken from the spectroscopic orbit by Crawford. The astrometric amplitude is marginal, and not certainly real. The pair BC (mags. 10.1-10.1, 0.3") is 91" distant and probably physical; Aa-BC = BU 1144. |