| 词条 | HD 162020 |
| 释义 |
| name = HD 162020 }}{{Starbox observe | epoch = J2000 | constell = Scorpius | ra = {{RA|17|50|38.3562}}[1] | dec = {{DEC|−40|19|06.066}}[1] | appmag_v = 9.12[3] }}{{Starbox character | class = K3V[3] | b-v = | u-b = | variable = }}{{Starbox astrometry | radial_v = | prop_mo_ra = {{val|19.057|0.140}}[1] | prop_mo_dec = {{val|−26.278|0.101}}[1] | parallax = 32.52 | p_error = 0.24 | parallax_footnote = [1] | absmag_v = }}{{Starbox detail | source = [8] | mass = 0.75 | radius = | luminosity = | luminosity_bolometric = | luminosity_visual = | gravity = {{val|4.76|0.25}} | temperature = {{val|4830|80}} | metal_fe = {{val|0.01|0.11}} | rotation = | rotational_velocity = 1.9 | age_gyr = }}{{Starbox catalog | names = CD−40 11894, HIP 87330[3] }}{{Starbox reference | Simbad = HD+162020 | NSTED = HD+162020 }}{{Starbox end}} HD 162020 is an orange dwarf star in Scorpius constellation with a brown dwarf companion. HD 162020 b{{Infobox planet| name = HD 162020 b | discoverer = Udry et al. | discovered = April 15, 2000 | discovery_method = Doppler Spectroscopy | apsis = astron | semimajor = {{convert|00751|AU|km|abbr=on}} | eccentricity = 0.277 ± 0.02 | period = 8.428198 ± 0.000056 d | time_periastron = 2451990.6768 ± 0.0050 | arg_peri = 28.40 ± 0.23 | semi-amplitude = 1813 ± 4 | mass = >15.0 {{Jupiter mass|link=y}} }} HD 162020 b is a brown dwarf with mass 15.0 MJ. The mass is minimum since inclination is not known. This planetar orbits very close to the star at a distance of 0.075 AU. Despite of this, it has an eccentric orbit of 27.7%. The distance from the star ranges from 0.054 to 0.096 AU. It has an extremely high semi-amplitude of 1.813 km/s. The discovery was announced on April 15, 2000 by the Geneva Extrasolar Planet Search Team.[8] References1. ^1 2 3 4 5 {{cite journal | title=Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties | url=https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html | last1=Brown | first1=A. G. A | last2=Vallenari | first2=A | last3=Prusti | first3=T | last4=De Bruijne | first4=J. H.J | last5=Mignard | first5=F | last6=Drimmel | first6=R | last7=Babusiaux | first7=C | last8=Bailer-Jones | first8=C. A.L | last9=Bastian | first9=U | last10=Biermann | first10=M | last11=Evans | first11=D. W | last12=Eyer | first12=L | last13=Jansen | first13=F | last14=Jordi | first14=C | last15=Katz | first15=D | last16=Klioner | first16=S. A | last17=Lammers | first17=U | last18=Lindegren | first18=L | last19=Luri | first19=X | last20=o'Mullane | first20=W | last21=Panem | first21=C | last22=Pourbaix | first22=D | last23=Randich | first23=S | last24=Sartoretti | first24=P | last25=Siddiqui | first25=H. I | last26=Soubiran | first26=C | last27=Valette | first27=V | last28=Van Leeuwen | first28=F | last29=Walton | first29=N. A | last30=Aerts | first30=C | display-authors=1 | journal=Astronomy and Astrophysics | volume=595 | at=A2 | year=2016 | arxiv=1609.04172 | bibcode=2016A&A...595A...2G | doi=10.1051/0004-6361/201629512 }}Gaia Data Release 1 catalog entry [1][2][3]2. ^1 2 3 {{cite simbad | title=HD 162020 | access-date=2018-04-02}} 3. ^1 2 {{cite journal | title=The CORALIE survey for southern extra-solar planets VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443, HD 202206: Brown dwarfs or "superplanets"? | url=http://www.aanda.org/articles/aa/full/2002/28/aa2416/aa2416.html | last1=Udry | first1=M. | last2=Mayor | first2=M. | last3=Naef | first3=D. | last4=Pepe | first4=F. | last5=Queloz | first5=D. | last6=Santos | first6=N. C. | last7=Burnet | first7=M. | display-authors=1 | journal=Astronomy and Astrophysics | volume=390 | issue=1 | pages=267–279 | year=2002 | arxiv=astro-ph/0202458 | bibcode=2002A&A...390..267U | doi=10.1051/0004-6361:20020685 }} }} External links
7 : Henry Draper Catalogue objects|Hipparcos objects|Scorpius (constellation)|K-type main-sequence stars|Brown dwarfs|Exoplanets discovered in 2000|Durchmusterung objects |
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