| 词条 | HD 210702 |
| 释义 |
| name = HD 210702 }}{{Starbox observe | epoch = J2000 | constell = Pegasus | ra = {{RA|22|11|51.33}}[1] | dec = {{DEC|+16|02|26.0}}[1] | appmag_v = 5.939 }}{{Starbox character | class = K1IV | r-i = 0.49 | v-r = | b-v = 0.951[3] | u-b = 0.73 | variable = }}{{Starbox astrometry | radial_v = 10.9 ± 2 | prop_mo_ra = -3.15 ± 0.34[1] | prop_mo_dec = -18.02 ± 0.33[1] | parallax = 18.20 | p_error = 0.39 | parallax_footnote = [1] | absmag_v = 2.201 }}{{Starbox detail | mass = 1.68 (1.50–1.84)[3] | radius = {{val|5.2314|0.1171}}[8] | luminosity = {{val|12.838|0.5569}}[8] | temperature = {{val|4780|18}}[8] | metal_fe = 0.03 [8] | gravity = 3.19 ± 0.08[3] | rotation = | age_gyr = 5.0[8] }} |- bgcolor = "#FFFAFA"{{Starbox catalog | names = BD+15º4592, HIP 109577, HR 8461, SAO 107729. }}{{Starbox reference | Simbad = HD+210702 | EPE = HD+210702 }}{{Starbox end}} HD 210702 is an orange subgiant star located approximately 179 light-years away in the constellation of Pegasus. With a mass of 1.8 times that of the Sun, the star spent its main-sequence life as an A-type star. The visual luminosity is 11.38 times that of the Sun and it is 182.4 light years away. The magnitude is near the naked-eye limit, but binoculars can easily see it. The star shows variability in its radial velocity consistent with a planet-mass companion in a Keplerian orbit, and one was duly discovered in April 2007, from observations at Lick and Keck Observatories in Mount Hamilton (California) and Mauna Kea (Hawai'i), United States. {{OrbitboxPlanet begin| table_ref = [3] }}{{OrbitboxPlanet | exoplanet = b | mass = >1.9 | period = 354.8 ± 1.1 | semimajor = 1.2 | eccentricity = 0.094 ± 0.052 }}{{Orbitbox end}} See also
References1. ^1 2 3 4 {{cite journal | title=Substellar Companions to Seven Evolved Intermediate-Mass Stars | last1=Sato | first1=Bun'ei | last2=Omiya | first2=Masashi | last3=Harakawa | first3=Hiroki | last4=Izumiura | first4=Hideyuki | last5=Kambe | first5=Eiji | last6=Takeda | first6=Yoichi | last7=Yoshida | first7=Michitoshi | last8=Itoh | first8=Yoichi | last9=Ando | first9=Hiroyasu | last10=Kokubo | first10=Eiichiro | last11=Ida | first11=Shigeru | display-authors=1 | journal=Publications of the Astronomical Society of Japan | volume=64 | issue=6 | at=135 | year=2012 | arxiv=1207.3141 | bibcode=2012PASJ...64..135S | doi=10.1093/pasj/64.6.135 }} [1][2][3]2. ^1 2 3 4 5 {{cite journal | title=Stellar diameters and temperatures – V. 11 newly characterized exoplanet host stars | last1=von Braun | first1=Kaspar | last2=Boyajian | first2=Tabetha S. | last3=Van Belle | first3=Gerard T. | last4=Kane | first4=Stephen R. | last5=Jones | first5=Jeremy | last6=Farrington | first6=Chris | last7=Schaefer | first7=Gail | last8=Vargas | first8=Norm | last9=Scott | first9=Nic | last10=Ten Brummelaar | first10=Theo A. | last11=Kephart | first11=Miranda | last12=Gies | first12=Douglas R. | last13=Ciardi | first13=David R. | last14=López-Morales | first14=Mercedes | last15=Mazingue | first15=Cassidy | last16=McAlister | first16=Harold A. | last17=Ridgway | first17=Stephen | last18=Goldfinger | first18=P. J. | last19=Turner | first19=Nils H. | last20=Sturmann | first20=Laszlo | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society | volume=438 | issue=3 | pages=2413–2425 | year=2014 | arxiv=1312.1792 | bibcode=2014MNRAS.438.2413V | doi=10.1093/mnras/stt2360 }} 3. ^1 2 3 4 5 {{cite journal | title=Validation of the new Hipparcos reduction | url=https://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }} Vizier catalog entry }}
7 : K-type subgiants|Henry Draper Catalogue objects|Hipparcos objects|Pegasus (constellation)|Planetary systems|Durchmusterung objects|HR objects |
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