r Ophiuchi


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0


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:

source of data: 19
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.