| 词条 | CHXR 73 |
| 释义 |
| name = CHXR 73 }}{{Starbox image | image = | caption = HST image of CHXR 73 and its companion }}{{Starbox observe | epoch = J2000.0 | constell = Chamaeleon | ra = {{RA|11|06|28.7626}} | dec = {{DEC|−77|37|33.1444}} }}{{Starbox character | class = M3[1] }}{{Starbox astrometry | radial_v = | prop_mo_ra = {{val|−22.193|0.233}} | prop_mo_dec = {{val|0.215|0.206}} | parallax = 5.2343 | p_error = 0.1759 | parallax_footnote = | absmag_v = }}{{Starbox detail | source=[2] | temperature=3490 ± 180 | luminosity=0.09 ± 0.07 | age_myr={{val|8|+70|-5}} | mass=0.32 ± 0.11 | radius=0.83 ± 0.04 }}{{Starbox catalog | names = 2MASS J11062877-7737331[8] }}{{Starbox reference | Simbad = CHXR+73 }}{{Starbox end}}CHXR 73 is a star in the constellation Chamaeleon, about 620 light-years away from Earth.[3] The star is located within Cha I, a molecular cloud.[8] It has a low temperature of 3,490 K typical of red dwarfs, but unlike typical red dwarfs it has an unusually large radius of {{solar radius|0.83}}—this is because of its young age, only 8 million years.[2] A companion, CHXR 73 b, has been found via direct imaging. CHXR 73 has a mass of about 12 Jupiters.[4] This is close to the upper mass limit for planets, making its classification difficult. {{OrbitboxOnePlanet| exoplanet = b | mass = {{val|12|8|5}} | separation = 200 | year = 2006 }} References1. ^{{cite web|url=http://exoplanet.eu/catalog/chxr_73_b/|title=Notes on CHXR 73 b|accessdate=24 December 2016}} [5]2. ^1 {{cite journal|bibcode=2013A&A...554A..43D|doi=10.1051/0004-6361/201321220|arxiv=1304.1150|title=Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I|journal=Astronomy & Astrophysics|volume=554|pages=A43|year=2013|last1=Daemgen|first1=S.|last2=Petr-Gotzens|first2=M. G.|last3=Correia|first3=S.|last4=Teixeira|first4=P. S.|last5=Brandner|first5=W.|last6=Kley|first6=W.|last7=Zinnecker|first7=H.}} 3. ^{{cite news|title= Newfound Object Further Blurs Planet Definition |url=http://www.space.com/2858-newfound-object-blurs-planet-definition.html |publisher=Space.com |accessdate=13 November 2016}} 4. ^{{cite journal | title=Discovery of a Young Substellar Companion in Chamaeleon | url= http://iopscience.iop.org/article/10.1086/506517/meta;jsessionid=9741E3B1B4D8BABD346C63A0ADA0B125.ip-10-40-2-223 | last1=Luhman | first1=K. | journal=The Astrophysical Journal | volume=649 | issue=2 | year=2006 | doi=10.1086/506517 | bibcode=2006ApJ...649..894L | pages=894–899|arxiv = astro-ph/0609187 }} 5. ^1 2 {{cite simbad | title=CHXR 73 | accessdate=13 November 2016}} }}{{Stars of Chamaeleon}}{{reddwarf-star-stub}} 4 : Chamaeleon (constellation)|M-type main-sequence stars|Emission-line stars|2MASS objects |
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