Marfik
catalogues and names
| catalogues and names | Marfik, l Oph, NSV 07784, 10 Oph, HR 6149, HD 148857, SAO 121658, BD +2 3118, WDS 16309+0159A |
| other names | Marfic, Marsic |
| constellation | Ophiuchus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Marfic; Marfik; Marsic. |
position, motion, parallax:
| position (J2000) | RA: 16h 30min 54.8sec | DEC: +1° 59' 2'' | ||
| position (B1900) | RA: 16h 25min 52.1sec | DEC: +2° 12' 10'' | ||
| proper motion (J2000) | RA: -0.027 arcsec/a | DEC: -0.073 arcsec/a | ||
| radial velocity | -14 km/s note: spectroscopic binaries |
|||
| rotational velocity | 127 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.01 arcsec | |||
| galactic coordinates | longitude: 17.12° | latitude: 31.85° | ||
| note (category: dynamical parallaxes): | 0.019". |
magnitude
| visual magnitude | 3.82 (V on UBV Johnson system) |
spectral / color information
| spectral class | A0V+A4V |
| B-V-magnitude | 0.01 |
| U-B-magnitude | 0.01 |
| R-I-magnitude |
variability information
| variable star identification | 7784 |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 1.2 arcsec |
| mag difference (of double or brightest multiple) | 1 |
| component ID | AB |
| note (category: double and multiple data): | AB 4.16 A1V, 5.22 A4V. 129.87y, a = 0.970" or 126.78y, a = 0.95", combined mag., colors. Component C, 11.0v, 120" CPM. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 30min 54.801sec | DEC: +1° 59' 2.1'' | ±0.19 arcsec | source: 33 |
| proper motion (J2000) | RA: -0.0024 arcsec/a | DEC: -0.079 arcsec/a | source: 25 | |
| radial velocity | -14 km/s | source: 25 | ||
| trigonometric parallax | 0.023 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 17.13° | latitude: 31.85° | ||
magnitude:
| visual | 3.82 (observed) | source: 25 |
| photovisual | 3.9 | source: 2 |
| photographic | 3.9 | source: 2 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | A0V+A4V | source: 25 | |
| B-magnitude | 3.83 ±0.05 | B-V-magnitude | 0.01 |
| U-magnitude | 3.84 ±0.05 | U-B-magnitude | 0.01 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 2.1 |
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 | |
| 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 | |
| 33 | Hipparcos Main Input Catalogue Version 2 |
| Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993 | |
| 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: 16h 28min 23.341sec | DEC: +2° 5' 31.06'' | ±0.01 arcsec |
| position (J2000) | RA: 16h 30min 54.833sec | DEC: +1° 59' 2.44'' | |
| proper motion B1950 (FK4) | RA: -0.002 arcsec/a | DEC: -0.075 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0018 arcsec/a | DEC: -0.073 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Combined magnitude of component stars. |
spectral information:
| spectral class | A0 |
| source of spectral data | Taken from the HD with M stars reclassified by Miss Cannon. |
remarks for duplicity and variability
| Double star - see source catalog for source |
catalogues
| source catalogue | FK3, catalogue number: 617 |
| Durchmusterung | BD+02 3118 |
| Boss General Catalogue | 22203 |
| Henry Draper Catalogue | 148857 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 30.9min | DEC: +1° 59' |
| proper motion (J2000) | RA: -0.03 arcsec/a | DEC: -0.074 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 | 1825 | often | ° | '' | 3.9 | 6 | A0V+A4V | STF2055 |
| AB-C | 1912 | 4 | 170° | 118.8'' | 3.82 | 11 | - | STF2055 |
| 1960 | - | 119.2'' | ||||||
| AD | 1918 | 2 | 246° | 313.8'' | 3.82 | 9.8 | - | STF2055 |
discoverer information:
| discoverer code | discoverer | reference |
| STF2055 | Struve, F.G.W. | - |
notes:
| note | Lambda Oph. P = 130yr., a = 0.97", motion direct. C is physical. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 16h 25.9min | DEC: +2° 12' |
magnitudes, spectral classes, orbital elements:
| author: | C. Finzi, M. Giannuzzi |
| date of observation: | 1947 |
| magnitude of component A: | 4.16 |
| magnitude of component B: | 4.16 |
| spectral class component B: | A0V |
| spectral class component B: | A0V |
| period [y]: | 129.87 |
| semi-major axis [arcsec]: | 0.97 |
| inclination [deg]: | 26.8 |
| node [deg]: | 52.5 |
| equinox of node: | 1950 |
| eccentricity: | 0.618 |
| time of periastron passage: | 1939.54 |
| dates of ephemeris: | 1950-1970 |
| grade: | good |
| reference: | Oss. Astron. Monte Mario Cont. 222; 1955. |
| notes | RV possibly variable. A companion (mag. 10.7, 120") has common proper motion (C. Worley, Astron. J. 72, 901; 1967). |
| other name(s) | STF 2055, Lambda Oph |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 16h 28min 23.3sec | DEC: +2° 5' 31'' |
variability informations:
| magnitute at max. brightness | 3.8 |
| magnitute at min. brightness | 3.83 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | A1 |
references
| to a study | 661340D (designation: ADS 10087) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |