Miram
| catalogues and names | Miram, h Per, NSV 15587, 15 Per, HR 834, HD 17506, SAO 23655, FK5: 99, WDS 02507+5554A |
| other names | Miram in Becvar |
| constellation | Perseus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Miram in Becvar; Allen says unnamed. |
position, motion, parallax:
| position (J2000) | RA: 2h 50min 41,8sec | DEC: +55° 53' 44'' |
| position (J1900) | RA: 2h 43min 23,8sec | DEC: +55° 28' 50'' |
| proper motion (J2000) | RA: 0,017 arcsec/a | DEC: -0,014 arcsec/a |
| radial velocity | -1 km/s note: spectroscopic binaries |
|
| rotational velocity | =<54 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,006 arcsec | |
magnitude
| visual magnitude | 3,76 (V on UBV Johnson system) |
spectral / color information
| spectral class | K3-Ib-IIa |
| B-V-magnitude | 1,68 |
| U-B-magnitude | 1,89 |
| R-I-magnitude | 0,89 |
| note (category: spectra): | Ultraviolet FeII emission. Also classified K3Ib. |
| note (category: colors): | Large infrared excess. |
double/multiple star system information
| number of components of multiple star system | 6 |
| separation | 28,3 arcsec |
| mag difference (of double or brightest multiple) | 4,7 |
| component ID | AB |
| note (category: double and multiple data): | Component B, B9V, CPM, vsini 149k/s. |
miscellaneous information
| note (category: group membership): | Red star Pleiades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 50min 41,811sec | DEC: +55° 53' 43,8'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,002 arcsec/a | DEC: -0,014 arcsec/a | source: 25 | |
| radial velocity | -1 km/s | source: 25 | ||
| trigonometric parallax | 0,006 | ±0,001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 139,15° | latitude: -3,18° | ||
| GCI unit vector (J2000) | X: 0,412241 | Y: 0,380061 | Z: 0,828016 | |
magnitude:
| visual | 3,76 (observed) | source: 25 |
| photovisual | 3,9 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K3-Ib-IIa | source: 25 | |
| B-magnitude | 5,44 ±0,05 | B-V-magnitude | 1,68 |
| U-magnitude | 7,33 ±0,05 | U-B-magnitude | 1,89 |
double/multiple star system information:
| separation between brightest and second brightest component | 28,3 arcsec |
| magnitude difference between brightest and second brightest component | 4,74 |
| position angle | 301 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 3,76 | K0 | Miram, h Persei, 15 Per, HR 834, HD 17506, SAO 23655 |
| B | 8,5 | A0 |
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: 2h 47min 1,935sec | DEC: +55° 41' 22,43'' | ±0,004 arcsec |
| position (J2000) | RA: 2h 50min 41,826sec | DEC: +55° 53' 43,73'' | |
| proper motion J1950 (FK4) | RA: 0,0023 arcsec/a | DEC: -0,011 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0022 arcsec/a | DEC: -0,015 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 99 |
| Durchmusterung | BD+55 714 |
| Boss General Catalogue | 3390 |
| Henry Draper Catalogue | 17506 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 50,7min | DEC: +55° 54' |
| proper motion (J2000) | RA: 0,017 arcsec/a | DEC: -0,014 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 |
| AB | 1836 | 23 | 301° | 28,3'' | 3,76 | 8,5 | M3Ib-IIa | STF 307 |
| AC | 1878 | 5 | 268° | 66,6'' | 3,9 | 9,9 | - | STF 307 |
| AE | 1821 | 2 | 205° | 238,1'' | 3,9 | - | - | SHJ 34 |
| CD | 1878 | 6 | 114° | 5,2'' | 9,9 | 10,4 | - | WAR 1 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 307 | Struve, F.G.W. | - |
| SHJ 34 | South & Herschel | - |
| WAR 1 | Warren, O.C.R. | (Pub. Wanganui Astron. Soc. No. 1; 1992.) |
notes:
| note | Eta Per. A is a spectroscopic binary. B is BD+55@712. Proper motion of B +016 -012. |