| 词条 | Psi1 Draconis |
| 释义 |
|name=ψ¹ Draconis}}{{Starbox image | image = | caption = ψ¹ Draconis in optical light }}{{Starbox observe 2s |constell=Draco |epoch=J2000 |component1=ψ¹ Dra A |ra1={{RA|17|41|56.35536}}[1] |dec1={{DEC|+72|08|55.8481}}[1] |appmag_v1=4.58[2] |component2=ψ¹ Dra B |ra2={{RA|17|41|58.10460}}[1] |dec2={{DEC|+72|09|24.8581}}[1] |appmag_v2=5.82[3] }}{{Starbox character |component1=ψ¹ Dra A |class=F5IV-V[7] |b-v=+0.43[2] |u-b=+0.01[2] |component2=ψ¹ Dra B |class2=F8V[10] |b-v2=+0.525[2] |u-b2=+0.04[2] }}{{Starbox astrometry |component1=ψ¹ Dra A |radial_v=-13.30 ± 0.2[4] |prop_mo_ra=25.32[1] |prop_mo_dec=-268.47[1] |parallax=43.79 |p_error=0.45 |parallax_footnote=[1] |component2=ψ¹ Dra B |radial_v2=-11.20 ± 0.3[4] |prop_mo_ra2=34.89[1] |prop_mo_dec2=-275.94[1] |parallax2=43.36 |p_error2=0.51 |parallax_footnote2=[1] }}{{Starbox orbit |reference=[21] |primary=ψ¹ Dra Aa |name=ψ¹ Dra Ab |period_unitless={{val|6774|+271|-167}} d |axis_unitless={{val|9.1|+0.4|-0.3}} AU |inclination=31 ± 1 |eccentricity={{val|0.679|+0.006|-0.004}} |periarg=32.6 ± 0.7 |periastron={{val|2450388|+169|-273}} |k1={{val|5.18|+0.04|-0.03}} |k2=11.1 ± 0.2 }}{{Starbox detail |component1=ψ¹ Dra A |mass={{val|1.38|+0.15|-0.08}} / 0.70 ± 0.07[5] |radius=1.2—1.3[6] |temperature=6544 ± 42 / 4400 ± 300[5] |gravity=3.90 ± 0.11[25] |metal_fe=−0.10 ± 0.05[25] |component2=ψ¹ Dra B |temperature2=6212 ± 75[7] |gravity2=4.20 ± 0.12[7] |radius2=1.5[6] |metallicity2=0.01 ± 0.06[7] |mass2=1.19 ± 0.07[7] |age2=3.3 ± 1.0[7] }}{{Starbox catalog |names=31 Dra, ADS 10759 AB, Gliese 694.1 |component1=ψ¹ Dra A |names1=BD+72° 804, HD 162003, HIP 86614, HR 6636, SAO 8890[8] |component2=ψ¹ Dra B |names2=BD+72° 805, HD 162004, HIP 86620, HR 6637, SAO 8891[9] }}{{Starbox reference |Simbad=*+psi01+Dra|sn=ψ¹ Dra AB |Simbad2=*+psi01+Dra+A|sn2=ψ¹ Dra A |Simbad3=*+psi01+Dra+B|sn3=ψ¹ Dra B }}{{Starbox end}}Psi¹ Draconis (ψ¹ Draconis, abbreviated Psi¹ Dra, ψ¹ Dra), also designated 31 Draconis, is a triple star system in the northern constellation of Draco. The system is fairly close, and is located about 75 light-years (23 parsecs) from the Sun, based on its parallax.[1] Psi¹ Draconis was considered a binary star consisting of a F-type subgiant and a F-type main-sequence star, designated Psi¹ Draconis A (also named Dziban[10]) and Psi¹ Draconis B, respectively. In 2015, Psi¹ Draconis A was itself found to be a double-lined spectroscopic binary, making the system a triple. The companion to Psi¹ Draconis A was designated Psi¹ Draconis C by its discoverers.[5] Also in 2015, Psi¹ Draconis B was discovered to be orbited by an exoplanet, designated Psi¹ Draconis Bb.[7] Nomenclatureψ¹ Draconis (Latinised to Psi¹ Draconis) is the system's Bayer designation and 31 Draconis its Flamsteed designation. The designation of the components – ψ¹ Draconis A and B – derives from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[11]Psi¹ Draconis bore the traditional name of Dziban or Dsiban, derived from the Arabic Adh-Dhi'ban, meaning "The two wolves" or "The two jackals".[12] In 2016, the IAU organized a Working Group on Star Names (WGSN)[13] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[14] It approved the name Dziban for the component Psi¹ Draconis A on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.[10]In Chinese astronomy, Psi¹ Draconis is called 女史, Pinyin: Nǚshǐ, meaning Female Protocol, because this star is marking itself and stands alone in the asterism Female Protocol in the Purple Forbidden enclosure (see Chinese constellation).[15] 女史 (Nǚshǐ) has been Latinised into Niu She by R.H. Allen, meaning "the Palace Governess", or "a Literary Woman".[12] Propertiesψ¹ Draconis AC and ψ¹ Draconis B are separated by about 31 arcseconds. Only a very small fraction of the orbit has been observed: an orbit of with a period 10,000 years has been calculated,[16] but it is extremely preliminary and likely to be in high error. ψ¹ Draconis A and C have varying radial velocities in respect to Earth, indicating that there must be orbital motion. The orbital period is estimated to be around 20 years, and the eccentricity must be fairly high, around 0.679.[5] ExoplanetPsi¹ Draconis Bb is a Jupiter-like exoplanet orbiting Psi¹ Draconis B, the secondary star. The planet was discovered when periodic Doppler shifts in the star's spectrum revealed the presence of a planet, similar to the spectroscopic binary nature of Psi¹ Draconis AC. Its minimum mass is {{jupiter mass|1.53|link=yes}}, and it orbits its host star every 8.5 years taking a relatively eccentric orbit.[7] {{OrbitboxPlanet begin| name = ψ¹ Draconis B | table_ref = [7] }}{{OrbitboxPlanet | exoplanet = b | mass = ≥1.53 ± 0.10 | semimajor = 4.43 ± 0.04 | period = 3117 ± 42s | eccentricity = 0.40 ± 0.05 }}{{Orbitbox end}} References1. ^1 2 3 4 5 6 7 8 9 10 {{cite journal|title=Validation of the new Hipparcos reduction|url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL|author1=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}} {{Stars of Draco}}2. ^1 2 3 4 {{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}} 3. ^{{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV data|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1|date=1986|bibcode= 1986EgUBV........0M}} 4. ^1 {{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}} 5. ^1 2 3 4 {{cite journal|doi=10.1088/0004-637X/815/1/62|arxiv=1511.01903|title= Mining Planet Search Data for Binary Stars: The ψ1 Draconis system |journal=The Astrophysical Journal|volume=815|pages=62|year=2015|last1=Gullikson|first1=Kevin|last2=Endl|first2=Michael|last3=Cochran|first3=William D.|last4=MacQueen|first4=Phillip J.|bibcode=2015ApJ...815...62G}} 6. ^1 {{cite journal|display-authors=1|author1=Pasinetti Fracassini, L. E.|author2=Pastori, L.|author3=Covino, S.|author4=Pozzi, A.|title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) – Third edition – Comments and statistics|journal=Astronomy & Astrophysics|volume=367|issue=2|pages=521–24|date=2001|bibcode=2001A&A...367..521P|doi=10.1051/0004-6361:20000451|arxiv=astro-ph/0012289}} 7. ^1 2 3 4 5 6 7 8 9 {{cite journal|doi=10.3847/0004-637X/818/1/34|arxiv=1512.02965|title=Two New Long-Period Giant Planets from the Mcdonald Observatory Planet Search and Two Stars with Long-Period Radial Velocity Signals Related to Stellar Activity Cycles|journal=The Astrophysical Journal|volume=818|pages=34|year=2016|last1=Endl|first1=Michael|last2=Brugamyer|first2=Erik J.|last3=Cochran|first3=William D.|last4=MacQueen|first4=Phillip J.|last5=Robertson|first5=Paul|last6=Meschiari|first6=Stefano|last7=Ramirez|first7=Ivan|last8=Shetrone|first8=Matthew|last9=Gullikson|first9=Kevin|last10=Johnson|first10=Marshall C.|last11=Wittenmyer|first11=Robert|last12=Horner|first12=Jonathan|last13=Ciardi|first13=David R.|last14=Horch|first14=Elliott|last15=Simon|first15=Attila E.|last16=Howell|first16=Steve B.|last17=Everett|first17=Mark|last18=Caldwell|first18=Caroline|last19=Castanheira|first19=Barbara G.|bibcode = 2016ApJ...818...34E }} 8. ^1 {{cite simbad|title=psi01 Dra A|access-date=17 March 2017}} 9. ^1 {{cite simbad|title=psi01 Dra B|access-date=17 March 2017}} 10. ^1 {{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |accessdate=16 December 2017}} 11. ^{{cite arXiv |title=On the naming convention used for multiple star systems and extrasolar planets |date=2010 |eprint=1012.0707 |class=astro-ph.SR |last1= Hessman |first1=F. V. |last2= Dhillon |first2=V. S. |last3= Winget |first3=D. E. |last4= Schreiber |first4=M. R. |last5= Horne |first5=K. |last6= Marsh |first6=T. R. |last7= Guenther |first7=E. |last8= Schwope |first8=A. |last9= Heber |first9=U. }} 12. ^1 Star Name – R.H. Allen p.212 13. ^{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}} 14. ^{{cite web | url=https://www.iau.org/static/science/scientific_bodies/working_groups/280/wg-starnames-triennial-report-2015-2018.pdf | page=5 | title=WG Triennial Report (2015-2018) - Star Names |accessdate=2018-07-14}} 15. ^{{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 10 日 16. ^{{cite web|url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars|work=United States Naval Observatory}} 13 : Draco (constellation)|Bayer objects|Flamsteed objects|Hypothetical planetary systems|F-type main-sequence stars|F-type subgiants|Hipparcos objects|HR objects|Henry Draper Catalogue objects|Durchmusterung objects|Gliese and GJ objects|Spectroscopic binaries|Triple star systems |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。