Astronomy:Upsilon Ophiuchi

From HandWiki
Revision as of 04:07, 9 December 2025 by Gametune (talk | contribs) (update)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Short description: Multiple star in the constellation Ophiuchus
Upsilon Ophiuchi
Location of υ Ophiuchi (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Ophiuchus[1]
Right ascension  16h 27m 48.17331s[2]
Declination −08° 22′ 18.4156″[2]
Apparent magnitude (V) 4.62[1]
Characteristics
Spectral type kA2hA5VmA5[3]
U−B color index +0.06[4]
B−V color index +0.16[4]
Astrometry
Radial velocity (Rv)−30.60[5] km/s
Proper motion (μ) RA: −97.526[2] mas/yr
Dec.: −33.97[2] mas/yr
Parallax (π)25.0819 ± 0.2300[2] mas
Distance130 ± 1 ly
(39.9 ± 0.4 pc)
Absolute magnitude (MV)1.75[1]
Orbit[6]
PrimaryAa1
CompanionAa2
Period (P)27.218±0.0005 d
Semi-major axis (a)≥ 0.0583 astronomical unit|AU
Eccentricity (e)0.744±0.002
Periastron epoch (T)2,438,914.84±0.01 JD
Argument of periastron (ω)
(secondary)		333.7±0.7°
Semi-amplitude (K1)
(primary)		34.9±0.3 km/s
Semi-amplitude (K2)
(secondary)		41.1±0.3 km/s
Orbit[7]
PrimaryAa
CompanionAb
Period (P)82.8±1.4 yr
Semi-major axis (a)0.79±0.03″
Eccentricity (e)0.45±0.03
Inclination (i)31.2±5.7°
Longitude of the node (Ω)86.8±6.9°
Periastron epoch (T)B 1994.1±1.0
Argument of periastron (ω)
(secondary)		177.9±7.4°
Details
Aa1
Mass1.83[8] M☉
Radius1.6[8][lower-alpha 1] R☉
Luminosity16.56[1] L☉
Surface gravity (log g)4.45[9] cgs
Temperature8,364[9] K
Metallicity [Fe/H]+0.14[1] dex
Rotational velocity (v sin i)44[10] km/s
Age50[8] Myr
Aa2
Mass1.47[8] M☉
Radius1.4[8][lower-alpha 1] R☉
Age50[8] Myr
Ab1
Mass0.82[8] M☉
Radius0.86[8][lower-alpha 1] R☉
Age45[8] Myr
Ab2
Mass0.70[8] M☉
Radius0.69[8][lower-alpha 1] R☉
Age45[8] Myr
Other designations
Alkarab, υ Oph, 3 Ophiuchi, BD−08°4243, FK5 3299, GC 22134, HD 148367, HIP 80628, HR 6129, SAO 141187, CCDM J16278-0822AB, WDS J16278-0822[11]
Database references
SIMBADdata
Aa1
Period = 27.s d
Ab2
Period = 82.8 yr
Ab1
Sep = 0.06 au
Ab2

Hierarchy of orbits[8]

Upsilon Ophiuchi is a quadruple star system in the equatorial constellation of Ophiuchus. It has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.62. The distance to this system is approximately 130 light years based on parallax. It is drifting closer with a radial velocity of −30.6 km/s.

The variable radial velocity of the brighter component was first observed by H. A. Abt in 1961. It is a double-lined spectroscopic binary system with an orbital period of 27.2 days and an eccentricity of 0.74.[6] They have a combined magnitude of 4.71. Both components are similar stars with a combined stellar classification of kA2hA5VmA5, and one or both are Am stars.[3] The fainter component has an 82.8 year orbit with the brighter pair at an eccentricity of 0.45,[7] and is itself binary, making the system a quadruple.[8] The system is a source for X-ray emission.[12]

This system forms part of the Upsilon Ophiuchi cluster, a small group of six stars which share similar kinematics and are spread over about eight degrees. The two brightest stars, apart from Upsilon Ophiuchi itself, are sometimes listed as components B and C: B is HD 148300, and C is HD 144660.[8] Both are 9th-magnitude K-class dwarfs.[13]

Notes

  1. ↑ 1.0 1.1 1.2 1.3 Calculated using angular diameters (0.37, 0.33, 0.20 and 0.16 milliarcseconds) and a distance of 39.9 parsecs via the equation R/R☉ = (107.5Slovene pronunciation: [{{{1}}}]Thai pronunciation: [{{{1}}}]Neukirch, Jürgen; Schmidt, Alexander; Wingberg, Kay (2000), Cohomology of Number Fields, Grundlehren der Mathematischen Wissenschaften, 323, Berlin: Springer-Verlag, ISBN 978-3-540-66671-4 Template:ScribuntoPersian pronunciation: [{{{1}}}]{| class="wikitable" width="100%"

    ! rowspan="3" colspan="2" width="14%" style="border-bottom:2px solid grey;" | Date/Time (UTC) ! Configuration ! Serial number ! Launch site ! Outcome |-

    |style="text-align:center;background-color:#e3e9e9;" | Payload |style="text-align:center;background-color:#e3e9e9;" | Separation orbit |style="text-align:center;background-color:#e3e9e9;" | Operator |style="text-align:center;background-color:#e3e9e9;" | Function |- | colspan="4" style="text-align:center;background-color:#e4dfdf;border-bottom:2px solid grey;" | Remarks |-

    Parameter 1=time required!
    Documentation[view] [edit] [history] [purge]

    This is a navigational template created using {{navbox}}. It can be transcluded on pages by placing {{Upsilon Ophiuchi}} below the standard article appendices.

    Initial visibility

    This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.

    To change this template's initial visibility, the |state= parameter may be used:

    • {{Upsilon Ophiuchi|state=collapsed}} will show the template collapsed, i.e. hidden apart from its title bar.
    • {{Upsilon Ophiuchi|state=expanded}} will show the template expanded, i.e. fully visible.

    Templates using the classes class=navbox ({{navbox}}) or class=nomobile ({{sidebar}}) are not displayed in article space on the mobile web site of English Wikipedia. Mobile page views accounted for 60% to 70% of all page views from 2020 through 2025. Briefly, these templates are not included in articles because 1) they are not well designed for mobile, and 2) they significantly increase page sizes—bad for mobile downloads—in a way that is not useful for the mobile use case. You can review/watch phab:T124168 for further discussion.

    TemplateData

    A navigational box that can be placed at the bottom of articles.

    Template parameters[Edit template data]

    ParameterDescriptionTypeStatus
    Statestate

    The initial visibility of the navbox

    Suggested values
    collapsed expanded autocollapse
    		Stringsuggested

    Template transclusions

    Transclusion maintenance
    Check completeness of transclusions
    The above documentation is transcluded from Template:Navbox documentation. (edit | history)
    Hawaiian pronunciation: [{{{1}}}]German pronunciation: [{{{1}}}]Dutch pronunciation: [{{{1}}}]Belarusian pronunciation: [{{{1}}}]Catalan pronunciation: [{{{1}}}]{{{1}}}Mongolian pronunciation: [{{{1}}}]Javanese pronunciation: [{{{1}}}]☒N Not doneLatin pronunciation: [{{{1}}}]

    | rowspan="1" colspan="2" style="border-top:2px solid #aabbcc;" |

    | style="border-top:2px solid #aabbcc;" | | style="border-top:2px solid #aabbcc;" | | style="border-top:2px solid #aabbcc;" | | style="border-top:2px solid #aabbcc;" |

    |-

    |-

    Vietnamese pronunciation: [{{{1}}}]Piedmontese pronunciation: [{{{1}}}]Slovak pronunciation: [{{{1}}}]text-align: auto;Expression error: Unrecognized punctuation character "{"./Expression error: Unrecognized punctuation character "{". (age Expression error: Unrecognized punctuation character "{".–Expression error: Unrecognized punctuation character "{".)Occitan pronunciation: [{{{1}}}]data-sort-value="" style="background: #ececec; color: #2C2C2C; vertical-align: middle; font-size: smaller; text-align: center; " class="table-na" | VariesHejazi pronunciation: [{{{1}}}]Spanish pronunciation: [{{{1}}}]Portuguese pronunciation: [{{{1}}}]Irish pronunciation: [{{{1}}}]Mayan pronunciation: [{{{1}}}]Nahuatl pronunciation: [{{{1}}}]Kyrgyz pronunciation: [{{{1}}}]Scottish Gaelic pronunciation: [{{{1}}}]Ukrainian pronunciation: [{{{1}}}]Burmese pronunciation: [{{{1}}}]Hindi pronunciation: [{{{1}}}]checkY DoneTo do To doRussian pronunciation: [{{{1}}}]Greek pronunciation: [{{{1}}}]Green tickYDanish pronunciation: [{{{1}}}]Northern Sami pronunciation: [{{{1}}}]Mandarin pronunciation: [{{{ipa}}}]Cantonese pronunciation: [{{{1}}}]Entry from Upsilon Ophiuchi from TCI Europe, retrieved on {{{Date}}}
    Documentation[view] [edit] [history] [purge]

    This is a navigational template created using {{navbox}}. It can be transcluded on pages by placing {{Upsilon Ophiuchi}} below the standard article appendices.

    Initial visibility

    This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.

    To change this template's initial visibility, the |state= parameter may be used:

    • {{Upsilon Ophiuchi|state=collapsed}} will show the template collapsed, i.e. hidden apart from its title bar.
    • {{Upsilon Ophiuchi|state=expanded}} will show the template expanded, i.e. fully visible.

    Templates using the classes class=navbox ({{navbox}}) or class=nomobile ({{sidebar}}) are not displayed in article space on the mobile web site of English Wikipedia. Mobile page views accounted for 60% to 70% of all page views from 2020 through 2025. Briefly, these templates are not included in articles because 1) they are not well designed for mobile, and 2) they significantly increase page sizes—bad for mobile downloads—in a way that is not useful for the mobile use case. You can review/watch phab:T124168 for further discussion.

    TemplateData

    A navigational box that can be placed at the bottom of articles.

    Template parameters[Edit template data]

    ParameterDescriptionTypeStatus
    Statestate

    The initial visibility of the navbox

    Suggested values
    collapsed expanded autocollapse
    		Stringsuggested
    The above documentation is transcluded from Template:Navbox documentation. (edit | history)
    Chambers, Robert; Thomson, Thomas Napier (1857). "[[s:A biographical dictionary of eminent Scotsmen/|]]". A Biographical Dictionary of Eminent Scotsmen. Glasgow: Blackie and Son. {{{1}}}Polish pronunciation: [{{{1}}}]Malagasy pronunciation: [{{{1}}}]Japanese pronunciation: [{{{1}}}]Armenian pronunciation: [{{{1}}}]Czech pronunciation: [{{{1}}}]∶Manx pronunciation: [{{{1}}}]http://www.iucnredlist.org/apps/redlist/details/full/{{{1}}}/0 Alemannic German pronunciation: [{{{1}}}]Tagalog pronunciation: [{{{1}}}]Egyptian Arabic pronunciation: [{{{1}}}]French pronunciation: ​[{{{1}}}]Error: Invalid time.In progress In progressPalomares, M. L. D. and Pauly, D., eds. (2011). "{{{1}}} {{{2}}}" in SeaLifeBase. April 2011 version.Turkish pronunciation: [{{{1}}}]Finnish pronunciation: [{{{1}}}]Froese, Rainer and Pauly, Daniel, eds. (2006). "{{{1}}} {{{2}}}" in FishBase. April 2006 version.

    |- | ... | — | — | — | — | — | —

    |-Old Norse pronunciation: [{{{1}}}]Salish pronunciation: [{{{1}}}]Basque pronunciation: [{{{1}}}]{{{1}}}data-sort-value="" style="background: #ececec; color: #2C2C2C; vertical-align: middle; font-size: smaller; text-align: center; " class="table-na" | UnreleasedNorwegian pronunciation: [{{{1}}}] (aged {{{4}}})Hungarian pronunciation: [{{{1}}}]Quechua pronunciation: [{{{1}}}]Arabic pronunciation: [{{{1}}}]Punjabi pronunciation: [{{{1}}}]Afrikaans pronunciation: [{{{1}}}]Romanian pronunciation: [{{{1}}}]Hebrew pronunciation: [{{{1}}}][INVALID OR MISSING PARAMETER IN TEMPLATE Upsilon Ophiuchi]Uto-Aztecan pronunciation: [{{{1}}}]Tamil pronunciation: [{{{1}}}]Hindustani pronunciation: [{{{1}}}]Swedish pronunciation: [{{{1}}}]Kazakh pronunciation: [{{{1}}}]
    Lao pronunciation: [{{{1}}}]Tibetan pronunciation: [{{{1}}}]Khmer pronunciation: [{{{1}}}]data-sort-value="" style="vertical-align:middle; text-align:center" class="table-na" | —{{{1}}}Welsh pronunciation: [{{{1}}}]Incomplete Partially doneAthabaskan pronunciation: [{{{1}}}]Māori pronunciation: [{{{1}}}]IPA: [{{{1}}}]Bulgarian pronunciation: [{{{1}}}]Korean pronunciation: [{{{1}}}]Icelandic pronunciation: ​[{{{1}}}]Sanskrit pronunciation: [{{{1}}}]Bengali pronunciation: [{{{1}}}]Indonesian pronunciation: [{{{1}}}]Serbo-Croatian pronunciation: [{{{1}}}]CROSBI {{{1}}}θSlovene pronunciation: [{{{1}}}]Thai pronunciation: [{{{1}}}]Neukirch, Jürgen; Schmidt, Alexander; Wingberg, Kay (2000), Cohomology of Number Fields, Grundlehren der Mathematischen Wissenschaften, 323, Berlin: Springer-Verlag, ISBN 978-3-540-66671-4 Template:ScribuntoPersian pronunciation: [{{{1}}}]{| class="wikitable" width="100%"

    ! rowspan="3" colspan="2" width="14%" style="border-bottom:2px solid grey;" | Date/Time (UTC) ! Configuration ! Serial number ! Launch site ! Outcome |-

    |style="text-align:center;background-color:#e3e9e9;" | Payload |style="text-align:center;background-color:#e3e9e9;" | Separation orbit |style="text-align:center;background-color:#e3e9e9;" | Operator |style="text-align:center;background-color:#e3e9e9;" | Function |- | colspan="4" style="text-align:center;background-color:#e4dfdf;border-bottom:2px solid grey;" | Remarks |-

    Parameter 1=time required!
    Documentation[view] [edit] [history] [purge]

    This is a navigational template created using {{navbox}}. It can be transcluded on pages by placing {{Upsilon Ophiuchi}} below the standard article appendices.

    Initial visibility

    This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.

    To change this template's initial visibility, the |state= parameter may be used:

    • {{Upsilon Ophiuchi|state=collapsed}} will show the template collapsed, i.e. hidden apart from its title bar.
    • {{Upsilon Ophiuchi|state=expanded}} will show the template expanded, i.e. fully visible.

    Templates using the classes class=navbox ({{navbox}}) or class=nomobile ({{sidebar}}) are not displayed in article space on the mobile web site of English Wikipedia. Mobile page views accounted for 60% to 70% of all page views from 2020 through 2025. Briefly, these templates are not included in articles because 1) they are not well designed for mobile, and 2) they significantly increase page sizes—bad for mobile downloads—in a way that is not useful for the mobile use case. You can review/watch phab:T124168 for further discussion.

    TemplateData

    A navigational box that can be placed at the bottom of articles.

    Template parameters[Edit template data]

    ParameterDescriptionTypeStatus
    Statestate

    The initial visibility of the navbox

    Suggested values
    collapsed expanded autocollapse
    		Stringsuggested

    Template transclusions

    Transclusion maintenance
    Check completeness of transclusions
    The above documentation is transcluded from Template:Navbox documentation. (edit | history)
    Hawaiian pronunciation: [{{{1}}}]German pronunciation: [{{{1}}}]Dutch pronunciation: [{{{1}}}]Belarusian pronunciation: [{{{1}}}]Catalan pronunciation: [{{{1}}}]{{{1}}}Mongolian pronunciation: [{{{1}}}]Javanese pronunciation: [{{{1}}}]☒N Not doneLatin pronunciation: [{{{1}}}]

    | rowspan="1" colspan="2" style="border-top:2px solid #aabbcc;" |

    | style="border-top:2px solid #aabbcc;" | | style="border-top:2px solid #aabbcc;" | | style="border-top:2px solid #aabbcc;" | | style="border-top:2px solid #aabbcc;" |

    |-

    |-

    Vietnamese pronunciation: [{{{1}}}]Piedmontese pronunciation: [{{{1}}}]Slovak pronunciation: [{{{1}}}]text-align: auto;Expression error: Unrecognized punctuation character "{"./Expression error: Unrecognized punctuation character "{". (age Expression error: Unrecognized punctuation character "{".–Expression error: Unrecognized punctuation character "{".)Occitan pronunciation: [{{{1}}}]data-sort-value="" style="background: #ececec; color: #2C2C2C; vertical-align: middle; font-size: smaller; text-align: center; " class="table-na" | VariesHejazi pronunciation: [{{{1}}}]Spanish pronunciation: [{{{1}}}]Portuguese pronunciation: [{{{1}}}]Irish pronunciation: [{{{1}}}]Mayan pronunciation: [{{{1}}}]Nahuatl pronunciation: [{{{1}}}]Kyrgyz pronunciation: [{{{1}}}]Scottish Gaelic pronunciation: [{{{1}}}]Ukrainian pronunciation: [{{{1}}}]Burmese pronunciation: [{{{1}}}]Hindi pronunciation: [{{{1}}}]checkY DoneTo do To doRussian pronunciation: [{{{1}}}]Greek pronunciation: [{{{1}}}]Green tickYDanish pronunciation: [{{{1}}}]Northern Sami pronunciation: [{{{1}}}]Mandarin pronunciation: [{{{ipa}}}]Cantonese pronunciation: [{{{1}}}]Entry from Upsilon Ophiuchi from TCI Europe, retrieved on {{{Date}}}
    Documentation[view] [edit] [history] [purge]

    This is a navigational template created using {{navbox}}. It can be transcluded on pages by placing {{Upsilon Ophiuchi}} below the standard article appendices.

    Initial visibility

    This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.

    To change this template's initial visibility, the |state= parameter may be used:

    • {{Upsilon Ophiuchi|state=collapsed}} will show the template collapsed, i.e. hidden apart from its title bar.
    • {{Upsilon Ophiuchi|state=expanded}} will show the template expanded, i.e. fully visible.

    Templates using the classes class=navbox ({{navbox}}) or class=nomobile ({{sidebar}}) are not displayed in article space on the mobile web site of English Wikipedia. Mobile page views accounted for 60% to 70% of all page views from 2020 through 2025. Briefly, these templates are not included in articles because 1) they are not well designed for mobile, and 2) they significantly increase page sizes—bad for mobile downloads—in a way that is not useful for the mobile use case. You can review/watch phab:T124168 for further discussion.

    TemplateData

    A navigational box that can be placed at the bottom of articles.

    Template parameters[Edit template data]

    ParameterDescriptionTypeStatus
    Statestate

    The initial visibility of the navbox

    Suggested values
    collapsed expanded autocollapse
    		Stringsuggested
    The above documentation is transcluded from Template:Navbox documentation. (edit | history)
    Chambers, Robert; Thomson, Thomas Napier (1857). "[[s:A biographical dictionary of eminent Scotsmen/|]]". A Biographical Dictionary of Eminent Scotsmen. Glasgow: Blackie and Son. {{{1}}}Polish pronunciation: [{{{1}}}]Malagasy pronunciation: [{{{1}}}]Japanese pronunciation: [{{{1}}}]Armenian pronunciation: [{{{1}}}]Czech pronunciation: [{{{1}}}]∶Manx pronunciation: [{{{1}}}]http://www.iucnredlist.org/apps/redlist/details/full/{{{1}}}/0 Alemannic German pronunciation: [{{{1}}}]Tagalog pronunciation: [{{{1}}}]Egyptian Arabic pronunciation: [{{{1}}}]French pronunciation: ​[{{{1}}}]Error: Invalid time.In progress In progressPalomares, M. L. D. and Pauly, D., eds. (2011). "{{{1}}} {{{2}}}" in SeaLifeBase. April 2011 version.Turkish pronunciation: [{{{1}}}]Finnish pronunciation: [{{{1}}}]Froese, Rainer and Pauly, Daniel, eds. (2006). "{{{1}}} {{{2}}}" in FishBase. April 2006 version.

    |- | ... | — | — | — | — | — | —

    |-Old Norse pronunciation: [{{{1}}}]Salish pronunciation: [{{{1}}}]Basque pronunciation: [{{{1}}}]{{{1}}}data-sort-value="" style="background: #ececec; color: #2C2C2C; vertical-align: middle; font-size: smaller; text-align: center; " class="table-na" | UnreleasedNorwegian pronunciation: [{{{1}}}] (aged {{{4}}})Hungarian pronunciation: [{{{1}}}]Quechua pronunciation: [{{{1}}}]Arabic pronunciation: [{{{1}}}]Punjabi pronunciation: [{{{1}}}]Afrikaans pronunciation: [{{{1}}}]Romanian pronunciation: [{{{1}}}]Hebrew pronunciation: [{{{1}}}][INVALID OR MISSING PARAMETER IN TEMPLATE Upsilon Ophiuchi]Uto-Aztecan pronunciation: [{{{1}}}]Tamil pronunciation: [{{{1}}}]Hindustani pronunciation: [{{{1}}}]Swedish pronunciation: [{{{1}}}]Kazakh pronunciation: [{{{1}}}]
    Lao pronunciation: [{{{1}}}]Tibetan pronunciation: [{{{1}}}]Khmer pronunciation: [{{{1}}}]data-sort-value="" style="vertical-align:middle; text-align:center" class="table-na" | —{{{1}}}Welsh pronunciation: [{{{1}}}]Incomplete Partially doneAthabaskan pronunciation: [{{{1}}}]Māori pronunciation: [{{{1}}}]IPA: [{{{1}}}]Bulgarian pronunciation: [{{{1}}}]Korean pronunciation: [{{{1}}}]Icelandic pronunciation: ​[{{{1}}}]Sanskrit pronunciation: [{{{1}}}]Bengali pronunciation: [{{{1}}}]Indonesian pronunciation: [{{{1}}}]Serbo-Croatian pronunciation: [{{{1}}}]CROSBI {{{1}}}d)/1000, where θ is the angular diameter and d is the distance.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement 99: 135. doi:10.1086/192182. Bibcode: 1995ApJS...99..135A. 
  4. ↑ 4.0 4.1 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode: 2014JAVSO..42..443M. Vizier catalog entry
  5. ↑ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication (Carnegie Institution for Science). ISBN 9780598216885. Bibcode: 1953GCRV..C......0W. 
  6. ↑ 6.0 6.1 Gutmann, F. (1965). "A study of the spectroscopic binary 3nu Ophiuchi (HD 148367)". Publications of the Dominion Astrophysical Observatory Victoria 12: 391–399. Bibcode: 1965PDAO...12..391G. 
  7. ↑ 7.0 7.1 "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6. 
  8. ↑ 8.00 8.01 8.02 8.03 8.04 8.05 8.06 8.07 8.08 8.09 8.10 8.11 8.12 8.13 8.14 Waisberg, Idel; Klein, Ygal; Katz, Boaz (2025-01-01). "Hidden Companions to Intermediate-mass Stars. Upgraded Multiplicity 3 → 4. XXIV. Discovery of a 0.70 M⊙, 0.06 au Companion to Upsilon Ophiuchi Ab (Plus Discovery of the υ Oph Mini-cluster)". Research Notes of the American Astronomical Society 9 (1): 1. doi:10.3847/2515-5172/ada35c. ISSN 2515-5172. Bibcode: 2025RNAAS...9....1W. 
  9. ↑ 9.0 9.1 David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal 804 (2): 146. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D.  Vizier catalog entry
  10. ↑ Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H. 
  11. ↑ "ups Oph". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ups+Oph. 
  12. ↑ Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars", Astronomy and Astrophysics 475 (2): 677–684, doi:10.1051/0004-6361:20077429, Bibcode: 2007A&A...475..677S 
  13. ↑ Kharchenko, N. V. (2001). "All-sky compiled catalogue of 2.5 million stars". Kinematika I Fizika Nebesnykh Tel 17 (5): 409. Bibcode: 2001KFNT...17..409K. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:Upsilon_Ophiuchi&oldid=3948605"