| 词条 | HD 108147 |
| 释义 |
| name = HD 108147 }}{{Starbox image | image = |caption=Star map shows star position on the southern edge of the constellation Crux }}{{Starbox observe | epoch = J2000 | constell = Crux | ra = {{RA|12|25|46.2673}}[1] | dec = {{DEC|−64|01|19.516}}[1] | appmag_v = 6.994[3] }}{{Starbox character | class = F8/G0V[3] | b-v = 0.537[5] | u-b = | variable = }}{{Starbox astrometry | radial_v = | prop_mo_ra = {{val|−182.635|0.030}}[1] | prop_mo_dec = {{val|−60.724|0.027}}[1] | parallax = 25.84 | p_error = 0.31 | parallax_footnote = [1] | absmag_v = }}{{Starbox detail | source = [5] | mass = {{val|1.27|0.02}} | radius = | luminosity = 1.93 | luminosity_bolometric = | luminosity_visual = | gravity = {{val|4.59|0.15}} | temperature = {{val|6265|40}} | metal_fe = {{val|0.2|0.06}} | rotation = 8.7 days | rotational_velocity = 5.13 | age_gyr = 2.17 }}{{Starbox catalog | names = CD−63°757, CPD−63°2270, GC 16944, HIP 60644, LTT 4696, SAO 251899[3] }}{{Starbox reference | Simbad = HD+108147 | NSTED = HD+108147 }}{{Starbox end}} HD 108147 is a 7th magnitude star in the constellation of Crux in direct line with and very near to the bright star Acrux or Alpha Crucis. It is either a yellow-white or yellow dwarf (the line is arbitrary and the colour difference is only from classification, not real), slightly brighter and more massive than our Sun. The spectral type is F8 V or G0 V. The star is also younger than the Sun. Due to its distance, about 126 light years, it is too dim to be visible with unaided eye; with binoculars it is an easy target. However, due to its southerly location it is not visible in the northern hemisphere except for the tropics. An extrasolar planet was detected orbiting it in 2000 by the Geneva Extrasolar Planet Search Team. This exoplanet is "a gas giant smaller than Jupiter that screams around its primary [star] in 11 days at only 0.1 AU." This is much closer than the orbit of Mercury in the Solar System.[1] It should not be confused with HD 107148, which also has an extrasolar planet discovered in 2006 in the Virgo constellation. {{OrbitboxPlanet begin| table_ref = [5] }}{{OrbitboxPlanet | exoplanet = b | mass = >0.40 | period = 10.901 ± 0.001 | semimajor = 0.104 | eccentricity = 0.498 ± 0.025 }}{{Orbitbox end}} See also
References1. ^Musgrave, Ian, “Starhopping - The Crux of the Matter” in ‘Sky & Space’ magazine, September–October 2006, Galaxy publishing. [2][3][4]2. ^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 3. ^1 2 3 {{cite journal | title=The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD 108147 and HD 168746 | url=https://www.aanda.org/articles/aa/full/2002/23/aah3477/aah3477.html | last1=Pepe | first1=F. | last2=Mayor | first2=M. | last3=Galland | first3=F. | last4=Naef | first4=D. | last5=Queloz | first5=D. | last6=Santos | first6=N. C. | last7=Udry | first7=S. | last8=Burnet | first8=M. | display-authors=1 | journal=Astronomy and Astrophysics | volume=388 | issue=2 | pages=632–638 | year=2002 | arxiv=astro-ph/0202457 | bibcode=2002A&A...388..632P | doi=10.1051/0004-6361:20020433 }} 4. ^1 2 3 {{cite simbad | title=HD 108147 | access-date=2018-04-03}} }} External links{{Sky|12|25|46.2686|-|64|01|19.516|125.7}}{{Stars of Crux}}{{main-star-stub}} 7 : F-type main-sequence stars|G-type main-sequence stars|Henry Draper Catalogue objects|Hipparcos objects|Crux (constellation)|Planetary systems|Durchmusterung objects |
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