r Ophiuchi
| catalogues and names | r Oph, 5 Oph, HR 6112, HD 147933, SAO 184382, WDS 16256-2327A |
| constellation | Ophiuchus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 25min 35,2sec | DEC: -23° 26' 50'' |
| position (J1900) | RA: 16h 19min 35,2sec | DEC: -23° 13' 1'' |
| proper motion (J2000) | RA: 0,002 arcsec/a | DEC: -0,018 arcsec/a |
| radial velocity | -10 km/s note: variable radial velocity |
|
| rotational velocity | 303 km/s (uncertain) (variable) | |
| dynamical parallax | 0,013 arcsec | |
| note (category: radial and/or rotational velocities): | Rapidly rotating star, candidate for becoming a Be star. |
magnitude
| visual magnitude | 5,02 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2IV |
| B-V-magnitude | 0,24 |
| U-B-magnitude | -0,55 |
| R-I-magnitude | 0,31 |
| note (category: spectra): | Sp. shows interstellar K1 line at 4044A. Interstellar SO emission features. |
double/multiple star system information
| number of components of multiple star system | 5 |
| separation | 3,2 arcsec |
| mag difference (of double or brightest multiple) | 0,7 |
| component ID | AB |
| note (category: double and multiple data): | Binary with HR 6113, combined colors. Combined mag. 4.63V. Component C, CoD-23d12862, 7.13v, B9n, 152" CPM, vsini 180k/s; D, 6.56 B3V at 156", vsini 167k/s. E, 8.1v, 0.6" from D. DE is ADS 10045. |
miscellaneous information
| note (category: group membership): | Sco OB2; upper Sco region; in reflection nebula; assoc. Sco R1; IC 4604. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 25min 35,158sec | DEC: -23° 26' 49,71'' | ±1,48 arcsec | source: 29 |
| proper motion (J2000) | RA: 0,0002 arcsec/a | DEC: -0,018 arcsec/a | source: 25 | |
| radial velocity | -10 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 353,69° | latitude: 17,69° | ||
| GCI unit vector (J2000) | X: -0,367343 | Y: -0,840674 | Z: -0,397903 | |
magnitude:
| visual | 5,06 (observed) | source: 25 |
| photovisual | 5,2 | source: 2 |
| photographic | 5,1 | source: 2 |
spectral information:
| spectral class | B5 | source: 29 | |
| Morgan-Keenan | B2IV | source: 25 | |
| B-magnitude | 5,28 ±0,05 | B-V-magnitude | 0,22 |
| U-magnitude | 4,7 ±0,05 | U-B-magnitude | -0,58 |
double/multiple star system information:
| separation between brightest and second brightest component | 3,1 arcsec |
| magnitude difference between brightest and second brightest component | 0,7 |
| position angle | 340 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5,06 | B5 | r Ophiuchi, 5 Oph, HR 6112, HD 147933, SAO 184382 |
| B | 5,74 | B5 | r Ophiuchi, 5 Oph, HR 6113, HD 147934, SAO 184381 |
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 | |
| 29 | SAOJ2000 |
| SAO on FK5 at J2000, 1989 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (J1950) | RA: 16h 22min 34,963sec | DEC: -23° 20' 1,41'' | ±0,015 arcsec |
| position (J2000) | RA: 16h 25min 35,158sec | DEC: -23° 26' 49,71'' | |
| proper motion J1950 (FK4) | RA: 0,0002 arcsec/a | DEC: -0,021 arcsec/a | ±0,003 arcsec/a in RA ±0,003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0002 arcsec/a | DEC: -0,018 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 22079 |
| Durchmusterung | CD-2312861A |
| Boss General Catalogue | 22079 |
| Henry Draper Catalogue | 147933 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 25,6min | DEC: -23° 27' |
| proper motion (J2000) | RA: -0,004 arcsec/a | DEC: -0,004 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 | 1822 | 71 | 3° | 4,1'' | 5,2 | 5,9 | B2IV B2V | H 19 |
| 1991 | 340° | 3,1'' | ||||||
| AC | 1846 | 4 | 0° | 151'' | 5,2 | 7,27 | B5V | H 19 |
| AD | 1846 | 6 | 253° | 156'' | 5,2 | 6,74 | - | H 19 |
| DE | 1889 | 17 | 26° | 0,9'' | 6,7 | 8,1 | B5V | BU 1115 |
| 1978 | 336° | 0,6'' |
discoverer information:
| discoverer code | discoverer | reference |
| H 19 | Herschel, W. | - |
| BU 1115 | Burnham, S.W. | - |
notes:
| note | H II 19. Rho Oph. Spectrum of D: B3/4V. |