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{{Starbox observe
{{Starbox observe
| epoch = [[J2000.0]]
| epoch = [[J2000.0]]
| equinox = [[J2000.0]]
| constell = [[Ophiuchus]]
| constell = [[Ophiuchus]]
| ra = {{RA|16|25|35.11766}}<ref name=HIP>{{cite journal|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|display-authors=etal|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|date=2007|arxiv=0708.1752|bibcode=2007A&A...474..653V|doi=10.1051/0004-6361:20078357}}</ref>
| pronounce =
⚫
| dec = {{DEC|-23|26|49.8150}}<ref name=HIP/>
| ra = {{RA|16|25|35.118}}<ref name=van_Leeuwen_07>{{Cite journal|bibcode=2007ASSL..350.....V|title=van Leeuwen, F. 2007, Hipparcos, the New Reduction of the Raw Data|journal=Hipparcos|volume=350|author1=Van Leeuwen|first1=Floor|year=2007}}</ref>
⚫
| dec = {{DEC|-23|26|49.81}}<ref name=van_Leeuwen_07 />
| appmag_v = 4.63<ref name=Ducati_02>{{Cite journal|bibcode=2002yCat.2237....0D|title=Ducati, J. R. 2002, CDS/ADC Collection of Electronic Catalogues|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|author1=Ducati|first1=J. R.|year=2002}}</ref>
| appmag_v = 4.63<ref name=Ducati_02>{{Cite journal|bibcode=2002yCat.2237....0D|title=Ducati, J. R. 2002, CDS/ADC Collection of Electronic Catalogues|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|author1=Ducati|first1=J. R.|year=2002}}</ref>
}}
}}
{{Starbox character
{{Starbox character
⚫
| component1 = ρ Oph AB
| class = {{nowrap|B2/B3V (ρ Oph A),}} {{nowrap|B2 V (ρ Oph B)<ref name=Houk_88>{{cite journal|bibcode=1988MSS...C04....0H|title=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0|journal=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4|author1=Houk|first1=N.|last2=Smith-Moore|first2=M.|year=1988}}}}</ref>}}
| class = B2/3V + B2V<ref name=Houk_88>{{cite journal|bibcode=1988MSS...C04....0H|title=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0|journal=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4|author1=Houk|first1=N.|last2=Smith-Moore|first2=M.|year=1988}}</ref>
| b-v = +0.24<ref name=UBV>{{cite journal|title=Catalogue of homogeneous data in the UBV photoelectric photometric system|date=1964|journal=Astronomy and Astrophysics, Supplement Series|volume=34|pages=1–49|author=Nicolet, B.|bibcode=1978A&AS...34....1N}}</ref>
| b-v = +0.24<ref name=UBV>{{cite journal|title=Catalogue of homogeneous data in the UBV photoelectric photometric system|date=1964|journal=Astronomy and Astrophysics, Supplement Series|volume=34|pages=1–49|author=Nicolet, B.|bibcode=1978A&AS...34....1N}}</ref>
| u-b = -0.56<ref name=UBV/>
| u-b = -0.56<ref name=UBV/>
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}}
}}
{{Starbox astrometry
{{Starbox astrometry
⚫
| component1 = ρ Oph AB
| radial_v =
| radial_v = -11.40 ± 3<ref name=Gontcharov>{{cite journal|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053}}</ref>
| prop_mo_ra = -5.53<ref name=van_Leeuwen_07 />
| prop_mo_dec = -21.74<ref name=van_Leeuwen_07 />
| prop_mo_ra = -5.53<ref name=HIP/>
| prop_mo_dec = -21.74<ref name=HIP/>
| parallax = 9.03
| p_error = 0.90
| parallax = 9.03
| p_error = 0.90
| parallax_footnote = <ref name=van_Leeuwen_07 />
| parallax_footnote = <ref name=HIP/>
⚫
| dist_ly = 360 (ρ Oph AB)
⚫
| absmag_v = -0.70{{cn|date=April 2017}}
⚫
| dist_pc = 111 (ρ Oph AB)
⚫
}}
⚫
| absmag_v = -0.70{{cn|date=April 2017}}
⚫
}}
{{Starbox orbit
{{Starbox orbit
| reference = <ref name=Novakovic>{{cite journal|title=Orbits of Five Visual Binary Stars|author=Novaković, B.|journal=Baltic Astronomy|volume=16|pages=435–442|date=2007|bibcode=2007BaltA..16..435N|arxiv=0712.4242}}</ref>
| reference = <ref name=Novakovic>{{cite journal|title=Orbits of Five Visual Binary Stars|author=Novaković, B.|journal=Baltic Astronomy|volume=16|pages=435–442|date=2007|bibcode=2007BaltA..16..435N|arxiv=0712.4242}}</ref>
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}}-->
}}-->
{{Starbox catalog
{{Starbox catalog
| names = {{odlist|B=ρ Oph|F=5 Oph}}
| names = [[Bayer designation|ρ]] Ophiuchi, [[Flamsteed designation|5]] Ophiuchi, [[Hipparcos Catalogue|HIP]]&nbsp;80473
| component1=ρ Oph A
| component1=ρ Oph A
| names1=[[Henry Draper Catalogue|HD]] 147933, [[Bright Star Catalogue|HR]] 6112, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 184382, {{nowrap|[[Cordoba Durchmusterung|CD]]–23 12861A}}
| names1={{odlist|HD=147933|HR=6112|HIP=80473A|SAO=184382|CD=-23° 12861A}}
| component2=ρ Oph B
| component2=ρ Oph B
| names2=[[Henry Draper Catalogue|HD]] 147934, [[Bright Star Catalogue|HR]] 6113, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 184381, {{nowrap|[[Cordoba Durchmusterung|CD]]–23 12861B}}
| names2={{odlist|HD=147934|HR=6113|HIP=80473|SAO=184381|CD=-23° 12861B}}
| component3=ρ Oph C
| component3=ρ Oph C
| names3=[[Hipparcos Catalogue|HIP]]&nbsp;80474, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 184383, {{nowrap|[[Cordoba Durchmusterung|CD]]–23 12862}}
| names3={{odlist|HIP=80474|SAO=184383|CD=-23° 12862}}
| component4=ρ Oph D
| component4=ρ Oph D
| names4=[[Henry Draper Catalogue|HD]] 147888, [[Hipparcos Catalogue|HIP]]&nbsp;80461, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 184377, {{nowrap|[[Cordoba Durchmusterung|CD]]–23 12860}}
| names4={{odlist|HD=147888|HIP=80461|SAO=184377|CD=-23° 12860}}
}}
}}
{{Starbox reference
{{Starbox reference
|Simbad=rho+Oph|sn=ρ Oph
| Simbad=rho+Oph|sn=ρ Oph
|Simbad2=rho+Oph+A|sn2=ρ Oph A
| Simbad2=rho+Oph+A|sn2=ρ Oph A
|Simbad3=rho+Oph+B|sn3=ρ Oph B
| Simbad3=rho+Oph+B|sn3=ρ Oph B
|Simbad4=rho+Oph+C|sn4=ρ Oph C
| Simbad4=rho+Oph+C|sn4=ρ Oph C
|Simbad5=rho+Oph+D|sn5=ρ Oph D
| Simbad5=rho+Oph+D|sn5=ρ Oph D
}}
}}
{{Starbox end}}
{{Starbox end}}
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Two to three other blue subgiants, ρ Oph C and ρ Oph DE, are found to be related to the star system, with sky-projected distances to ρ Oph AB of ~ 17,000 and ~ 19,000 AU, respectively. ρ Oph C and ρ Oph D are also of [[stellar classification|class]] B. {{cn|date=April 2017}}
Two to three other blue subgiants, ρ Oph C and ρ Oph DE, are found to be related to the star system, with sky-projected distances to ρ Oph AB of ~ 17,000 and ~ 19,000 AU, respectively. ρ Oph C and ρ Oph D are also of [[stellar classification|class]] B. {{cn|date=April 2017}}


The [[Apparent Magnitude|apparent brightness]] of the star system has been dimmed by about 2 magnitudes{{Citation needed|date=May 2014}}, as a result of interstellar [[Extinction (astronomy)|extinction]], due to its location within the [[Ophiuchus cloud]]. The star system, ρ Oph AB, is located about 360 [[light years]] away.<ref name=van_Leeuwen_07 />
The [[Apparent Magnitude|apparent brightness]] of the star system has been dimmed by about 2 magnitudes{{Citation needed|date=May 2014}}, as a result of interstellar [[Extinction (astronomy)|extinction]], due to its location within the [[Ophiuchus cloud]]. The star system, ρ Oph AB, is located about 360 [[light years]] away.<ref name=HIP/>


==References==
==References==

Revision as of 08:38, 2 July 2017

This article is about the star. For the dark cloud star forming region, see Rho Ophiuchi cloud complex.
ρ Ophiuchi
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ophiuchus
Right ascension 16h 25m 35.11766s[1]
Declination −23° 26′ 49.8150″[1]
Apparent magnitude (V) 4.63[2]
Characteristics
ρ Oph AB
Spectral type B2/3V + B2V[3]
U−B color index -0.56[4]
B−V color index +0.24[4]
Astrometry
ρ Oph AB
Radial velocity (Rv)-11.40 ± 3[5] km/s
Proper motion (μ) RA: -5.53[1] mas/yr
Dec.: -21.74[1] mas/yr
Parallax (π)9.03 ± 0.90 mas[1]
Distance360 ± 40 ly
(110 ± 10 pc)
Absolute magnitude (MV)-0.70[citation needed]
Orbit[6]
Primaryρ Oph A
Companionρ Oph B
Period (P)2398 ± 326 yr
Semi-major axis (a)4.25 ± 0.79″
Eccentricity (e)0.675 ± 0.322
Inclination (i)135.3 ± 6.0°
Longitude of the node (Ω)77.5 ± 13.5°
Periastron epoch (T)B 2327 ± 343
Argument of periastron (ω)
(secondary)		226.1 ± 15.3°
Orbit[6]
Primaryρ Oph D
Companionρ Oph E
Period (P)675.5 ± 32.5 yr
Semi-major axis (a)1.01 ± 0.15″
Eccentricity (e)0.707 ± 0.112
Inclination (i)134.8 ± 2.7°
Longitude of the node (Ω)152.7 ± 4.6°
Periastron epoch (T)B 2008.6 ± 34.2
Argument of periastron (ω)
(secondary)		260.4 ± 1.1°
Other designations
ρ Oph A: CD−23° 12861A, HD 147933, HIP 80473A, HR 6112, SAO 184382
ρ Oph B: CD−23° 12861B, HD 147934, HIP 80473, HR 6113, SAO 184381
ρ Oph C: CD−23° 12862, HIP 80474, SAO 184383
ρ Oph D: CD−23° 12860, HD 147888, HIP 80461, SAO 184377
Database references
SIMBADρ Oph
ρ Oph A
ρ Oph B
ρ Oph C
ρ Oph D
ρ Ophiuchi region (N is down): Antares is the bright yellow star, σ Scorpii the red star, and M4 the globular cluster in between. ρ Ophiuchi is the close pair in blue nebulosity near the centre of the image.

Rho Ophiuchi (ρ Ophiuchi) is a multiple star system in the constellation Ophiuchus. It consists of at least two blue subgiants, ρ Oph A and ρ Oph B, both of which are of class B.[7] ρ Oph AB is a visual binary, and the sky-projected distance between ρ Oph A and ρ Oph B is 3.1" (or 344 AU at the 111 pc distance of ρ Oph AB).[7]

Two to three other blue subgiants, ρ Oph C and ρ Oph DE, are found to be related to the star system, with sky-projected distances to ρ Oph AB of ~ 17,000 and ~ 19,000 AU, respectively. ρ Oph C and ρ Oph D are also of class B. [citation needed]

The apparent brightness of the star system has been dimmed by about 2 magnitudes[citation needed], as a result of interstellar extinction, due to its location within the Ophiuchus cloud. The star system, ρ Oph AB, is located about 360 light years away.[1]

References

  1. ^ a b c d e f van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. ^ Ducati, J. R. (2002). "Ducati, J. R. 2002, CDS/ADC Collection of Electronic Catalogues". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4. Bibcode:1988MSS...C04....0H.
  4. ^ a b Nicolet, B. (1964). "Catalogue of homogeneous data in the UBV photoelectric photometric system". Astronomy and Astrophysics, Supplement Series. 34: 1–49. Bibcode:1978A&AS...34....1N.
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  6. ^ a b Novaković, B. (2007). "Orbits of Five Visual Binary Stars". Baltic Astronomy. 16: 435–442. arXiv:0712.4242. Bibcode:2007BaltA..16..435N.
  7. ^ a b Cordiner, M. A.; Fossey, S. J.; Smith, A. M.; Sarre, P. J. (2013). "Cordiner, M. A., Fossey, S. J., Smith, A. M. and Sarre, P. J. 2013, ApJ, 764, L10". The Astrophysical Journal Letters. 764: L10. Bibcode:2013ApJ...764L..10C. doi:10.1088/2041-8205/764/1/L10.
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