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| {{Starbox begin
| | Greetings! I am Marvella and I feel comfy when people use the full name. For a whilst I've been in South Dakota and my mothers and fathers live nearby. Body building is one of the things I adore most. I am a meter reader but I plan on altering it.<br><br>Here is my web-site ... std home test [[http://www.egitimpark.net/siir/groups/clear-up-a-candida-with-these-tips/ just click the up coming internet site]] |
| | name = [[Henry Draper Catalogue|HD]] 28185
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| }}
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| {{Starbox observe
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| | epoch = J2000.0
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| | constell = [[Eridanus (constellation)|Eridanus]]
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| | ra = {{RA|04|26|26.32}}<ref name="van Leeuwen2007"/>
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| | dec = {{DEC|–10|33|02.9}}<ref name="van Leeuwen2007"/>
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| | appmag_v = +7.81
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| | appmag_b = +8.52
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| }}
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| {{Starbox character
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| | class = G5V
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| | b-v = 0.750
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| | u-b = ?
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| | variable = none
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| }}
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| {{Starbox astrometry
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| | radial_v = 49.6
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| | prop_mo_ra = 84.42 ± 0.84<ref name="van Leeuwen2007"/>
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| | prop_mo_dec = –57.66 ± 0.72<ref name="van Leeuwen2007"/>
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| | parallax = 23.62
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| | p_error = 0.87
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| | parallax_footnote = <ref name="van Leeuwen2007"/>
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| | absmag_v = +4.68<ref group="note">Derived from apparent magnitude and parallax: <math>\scriptstyle M_V=m_V-5\log_{10}\left(\frac{100}{\pi}\right)</math></ref>
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| }}
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| {{Starbox detail
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| | metal = 173%
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| | mass = 0.99 ± 0.07
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| | radius = 1.04
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| | rotation = 30 days
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| | luminosity_visual = 1.15<ref group="note">Derived from absolute visual magnitude: <math>\scriptstyle \frac{L_\ast}{L_{\odot}}=100^{(M_{V_\odot}-M_{V_\ast})/5}</math></ref>
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| | temperature = 5705
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| | age_gyr = 7.5
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| }}
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| {{Starbox catalog
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| | names = [[Durchmusterung|BD]]–10°919, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 149631, [[Hipparcos#Published catalogues|HIP]] 20723, [[Guide Star Catalog|GSC]] 05317-00733
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| }}
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| {{Starbox reference
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| | Simbad = HD+28185
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| | EPE = HD+28185
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| }}
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| {{Starbox end}}
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| '''HD 28185''' is a [[yellow dwarf]] [[star]] similar to our [[Sun]] located about 138 [[light-years]] away from Earth in the [[constellation]] [[Eridanus (constellation)|Eridanus]]. The designation HD 28185 refers to its entry in the [[Henry Draper catalogue]]. The star is known to possess one long-[[orbital period|period]] [[extrasolar planet]].
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| ==Distance and visibility==
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| According to measurements from the [[Hipparcos]] [[astrometry|astrometric]] [[satellite]], HD 28185 has a [[parallax]] of 23.62 [[Minute of arc|milliarcsecond]]s,<ref name="van Leeuwen2007"/> which corresponds to a distance of 42 [[parsec]]s (138 [[light-year]]s). Since the star is located further than 25 parsecs from Earth, it is not listed in the [[Gliese Catalogue of Nearby Stars]]. With an [[apparent magnitude]] of 7.81, the star is not visible with the [[naked eye]], though it can be seen using [[binoculars]].
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| ==Stellar characteristics==
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| HD 28185 is similar to our Sun in terms of [[mass]], [[radius]], and [[luminosity]]. The star is on the [[main sequence]] and is generating [[energy]] by [[nuclear fusion|fusing]] [[hydrogen]] in its core. The [[stellar classification|spectral type]] of G5V implies HD 28185 is cooler than the Sun. Like the majority of extrasolar planet host stars, HD 28185 is [[metal-rich]] relative to the Sun, containing around 173% of the solar abundance of [[iron]]. The star rotates slower than the Sun, with a period of around 30 days, compared to 25.4 days for the Sun.
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| Based on the star's [[chromosphere|chromospheric activity]], HD 28185 is estimated to have an age of around 2,900 million years. On the other hand, [[stellar evolution|evolutionary models]] give an age of around 7,500 million years and a mass 0.99 times that of our Sun.<ref name="santos">{{cite journal | url=http://www.aanda.org/articles/aa/full/2001/45/aah3054/aah3054.html | author=Santos, N. et al. | title=The CORALIE survey for southern extra-solar planets VI. New long-period giant planets around HD 28185 and HD 213240 | journal=[[Astronomy and Astrophysics]] | volume=379 | year=2001 | issue=3 | pages=999–1004 | doi=10.1051/0004-6361:20011366 | bibcode=2001A&A...379..999S}}</ref> The higher luminosity and longer rotation period favour an older age for the star.
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| ==Planetary system==
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| In 2001 an [[extrasolar planet]] similar in size to Jupiter designated [[HD 28185 b]] was discovered in orbit around the star with a period of 1.04 years.<ref name="santos"/><ref name="eso0114"/> Unlike many long-period extrasolar planets, it has a low [[eccentricity (orbit)|orbital eccentricity]].<ref name="Butler2006"/> The planet experiences similar [[insolation]] to [[Earth]], which has led to speculations about the possibilities for [[planetary habitability|habitable]] [[natural satellite|moon]]s.<ref>{{cite web|url=http://nai.nasa.gov/news_stories/news_detail.cfm?ID=126|title=Extrasolar Planets with Earth-like Orbits|author=Mullen, L.|accessdate=22 July 2006|year=2001}}</ref><ref>{{cite journal|bibcode=2006ApJ...649.1010J|author=Jones, Barrie W.; Sleep, P. Nick; Underwood, David R.|title=Habitability of Known Exoplanetary Systems Based on Measured Stellar Properties|journal=[[The Astrophysical Journal]]|volume=649|issue=2|year=2006|pages=1010–1019|doi=10.1086/506557|arxiv = astro-ph/0603200 }}</ref> In addition, numerical simulations suggest that low-mass planets located in the gas giant's [[Trojan point]]s would be stable for long periods.<ref>{{cite journal|bibcode=2007A&A...474.1023S|title=Survey of the stability region of hypothetical habitable Trojan planets|author=Schwarz, R.; Dvorak, R.; Süli, Á.; Érdi, B.|journal=[[Astronomy and Astrophysics]]|volume=474|issue=3|pages=1023–1029|doi=10.1051/0004-6361:20077994|year=2007}}</ref> The planet's existence was independently confirmed by the [[Magellan Planet Search Program]] in 2008.<ref>{{cite journal | title=Low-Mass Companions for Five Solar-Type Stars From the Magellan Planet Search Program | journal=[[The Astrophysical Journal]] | url=http://iopscience.iop.org/0004-637X/693/2/1424/fulltext | year=2009 | volume=693 | issue=2 | pages=1424–1430 | doi=10.1088/0004-637X/693/2/1424 | display-authors=1 | last1=Minniti | first1=Dante | last2=Butler | first2=R. Paul | last3=López-Morales | first3=Mercedes | last4=Shectman | first4=Stephen A. | last5=Adams | first5=Fred C. | last6=Arriagada | first6=Pamela | last7=Boss | first7=Alan P. | last8=Chambers | first8=John E. | bibcode=2009ApJ...693.1424M|arxiv = 0810.5348 }}</ref>
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| The star also shows evidence of a long-term radial velocity trend, which may indicate the presence of an additional outer companion.<ref>{{cite journal|author=Chauvin, G.; Lagrange, A.-M.; Udry, S.; Fusco, T.; Galland, F.; Naef, D.; Beuzit, J.-L.; Mayor, M.|year=2006|journal=[[Astronomy and Astrophysics]]|volume=456|issue=3|pages=1165–1172|title=Probing long-period companions to planetary hosts. VLT and CFHT near infrared coronographic imaging surveys|bibcode=2006A&A...456.1165C|doi=10.1051/0004-6361:20054709|arxiv = astro-ph/0606166 }}</ref>
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| {{OrbitboxPlanet begin
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| | table_ref = <ref name="santos"/>}}
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| {{OrbitboxPlanet
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| | exoplanet = [[HD 28185 b|b]]
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| | mass = ≥5.7
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| | period = 383 ± 2
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| | semimajor = 1.031 ± 0.060
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| | eccentricity = 0.07 ± 0.04
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| }}
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| {{Orbitbox end}}
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| ==See also==
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| * [[51 Pegasi]]
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| * [[Iota Horologii]]
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| ==Notes==
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| <references group="note"/>
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| ==References==
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| {{Reflist|refs=
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| <ref name="Butler2006">{{cite journal | title=Catalog of Nearby Exoplanets | url=http://iopscience.iop.org/0004-637X/646/1/505/fulltext/ | last1=Butler | first1=R. P. | last2=Wright | first2=J. T. | last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A. | last5=Vogt | first5=S. S. | last6=Tinney | first6=C. G. | last7=Jones | first7=H. R. A. | last8=Carter | first8=B. D. | last9=Johnson | first9=J. A. | last10=McCarthy | first10=C. | last11=Penny | first11=A. J. | display-authors=1 | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505–522 | year=2006 | doi=10.1086/504701 | bibcode=2006ApJ...646..505B | arxiv=astro-ph/0607493 }}</ref>
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| <ref name="eso0114">{{cite press release | title=Exoplanets: The Hunt Continues! | date=April 4, 2001 | publisher=European Southern Observatory | location=Garching, Germany | url=http://www.eso.org/public/news/eso0114/ | accessdate=December 27, 2012 }}</ref>
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| <ref name="van Leeuwen2007">{{cite journal | title=Validation of the new Hipparcos reduction | url=http://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 }}[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=20670 Vizier catalog entry ] </ref>
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| }}
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| ==External links==
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| * [http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=130 '''Extrasolar Visions''': HD 28185]
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| {{Sky|04|26|26.3205|-|10|33|02.955|138}}
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| {{Good article}}
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| {{Stars of Eridanus}}
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| [[Category:Eridanus (constellation)]]
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| [[Category:G-type main-sequence stars]]
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| [[Category:Henry Draper Catalogue objects|028185]]
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| [[Category:Hipparcos objects|020723]]
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| [[Category:Planetary systems]]
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Greetings! I am Marvella and I feel comfy when people use the full name. For a whilst I've been in South Dakota and my mothers and fathers live nearby. Body building is one of the things I adore most. I am a meter reader but I plan on altering it.
Here is my web-site ... std home test [just click the up coming internet site]