Editing Upsilon Andromedae (section)

{{Short description|Star in the constellation Andromeda}}
{{About|υ Andromedae|the variable star|U Andromedae}}
{{Starbox begin
| name = υ Andromedae / Titawin
}}
{{Starbox image
 | image=
{{Location mark
|image=Andromeda constellation map.svg|alt=|float=center|width=260
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=υ Andromedae
|x=306|y=396
}}
|caption=Location of υ Andromedae (circled)
}}
{{Starbox observe 2s
| epoch      = J2000.0
| constell   = [[Andromeda (constellation)|Andromeda]]
| component1 = υ And A
| ra1        = {{RA|01|36|47.84154}}<ref name="Gaia EDR3 for A"/>
| dec1       = {{DEC|+41|24|19.6514}}<ref name="Gaia EDR3 for A"/>
| appmag_v1  = 4.10<ref name=Belle/>
| component2 = υ And D{{efn|name=note}}
| ra2        = {{RA|01|36|50.40476}}<ref name="Gaia EDR3 for D"/>
| dec2       = {{DEC|+41|23|32.1228}}<ref name="Gaia EDR3 for D"/>
| appmag_v2  = 
}}
{{Starbox character
| class = F8V<ref name=mk/>&nbsp;+&nbsp;M4.5V<ref name="lowrance"/>
| appmag_1_passband = B
| appmag_1 = 4.63<ref name="SIMBAD"/>
| r-i = 0.30<ref name="McArthur2010">{{cite journal | url=http://hubblesite.org/pubinfo/pdf/2010/17/pdf.pdf |display-authors=1 | last1=McArthur |first1=Barbara E.| last2=Benedict |first2=G. Fritz| last3=Barnes |first3=Rory| last4=Martioli |first4=Eder| last5=Korzennik |first5=Sylvain| last6=Nelan |first6=Ed| last7=Butler |first7=R. Paul | title=New Observational Constraints on the ''υ'' Andromedae System with Data from the ''Hubble Space Telescope'' and ''Hobby Eberly Telescope'' |journal=The Astrophysical Journal |volume=715 |issue=2 |pages=1203 | date=2010 | doi=10.1088/0004-637X/715/2/1203 |bibcode=2010ApJ...715.1203M |s2cid=120127162 }}</ref>
| v-r = 0.30<ref name="McArthur2010"/>
| b-v = 0.54
| u-b = 0.06
}}
{{Starbox astrometry
| component1 = υ And A
| radial_v = {{val|−28.59|0.08}}<ref name=rv/>
| prop_mo_ra = {{val|−171.892}}<ref name="Gaia EDR3 for A"/>
| prop_mo_dec = {{val|−381.815}}<ref name="Gaia EDR3 for A"/>
| parallax = 74.1940
| p_error = 0.2083
| parallax_footnote = <ref name="Gaia EDR3 for A"/>
| absmag_v = {{val|3.44|0.02}}<ref name=aaa336_942/>
| component2 = υ And D{{efn|name=note}}
| radial_v2 =
| prop_mo_ra2 = {{val|−172.437}}<ref name="Gaia EDR3 for D"/>
| prop_mo_dec2 = {{val|−383.824}}<ref name="Gaia EDR3 for D"/>
| parallax2 = 74.1815
| p_error2 = 0.0356
| parallax_footnote2 = <ref name="Gaia EDR3 for D"/>
| absmag_v2 =
}}
{{Starbox detail
| component1 = υ And A
| mass = {{val|1.23|0.03|0.09}}<ref name=Baines2025/>
| radius = {{val|1.57|0.03}}<ref name=Baines2021/>
| gravity = {{val|4.0|0.1}}<ref name=aaa336_942/>
| luminosity = {{val|3.1|0.1}}<ref name=Baines2021/>
| temperature = {{val|6614|77|fmt=commas}}<ref name=Baines2021/>
| habitable_inner = {{val|1.43|0.05}}<ref name=Baines2025/> [[Astronomical unit|AU]]
| habitable_outer = {{Val|2.84|0.08}}<ref name=Baines2025/> AU
| metal_fe = 0.08<ref name=Baines2021/>
| rotation = {{val|7.3|0.04|u=days}}<ref name=mnras408_3_1666/>
| rotational_velocity = {{val|9.5|0.8}}<ref name=aaa336_942/>
| age_gyr = {{val|4.02|1.91|0.82}}<ref name=Baines2025/>
| component2 = υ And D{{efn|name=note}}
| mass2 = 0.2<ref name="lowrance"/>
}}
{{Starbox catalog
| names = Titawin,<ref name="IAU-CSN">{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |access-date=28 July 2016}}</ref> 50&nbsp;Andromedae, [[Bonner Durchmusterung|BD]]+40&nbsp;332, CCDM&nbsp;01367+4125, [[FK5]]&nbsp;1045, GC&nbsp;1948, [[General Catalogue of Trigonometric Parallaxes|GCTP]]&nbsp;331.00, [[Gliese Catalogue of Nearby Stars|Gl]]&nbsp;61, [[Henry Draper catalogue|HD]]&nbsp;9826, [[Hipparcos catalogue|HIP]]&nbsp;7513, [[Harvard Revised catalogue|HR]]&nbsp;458, [[Luyten Two-Tenths catalogue|LTT]]&nbsp;10561, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;37362, [[PPM Star Catalogue|PPM]]&nbsp;44216, [[Washington Double Star Catalog|WDS]]&nbsp;01368+4124A, 2MASS J01364784+4124200, Gaia DR2 348020448377061376
}}
{{Starbox reference
| Simbad = HD+9826
| Simbad2 = UCAC4+657-006214|sn2=υ And D
| NSTED = ups%20And
| ARICNS =
}}
{{Starbox end}}
'''Upsilon Andromedae''' ('''υ Andromedae''', abbreviated '''Upsilon And''', '''υ And''') is a [[binary star]] located 44 [[light-year]]s from Earth in the [[constellation]] of [[Andromeda (constellation)|Andromeda]]. The system consists of an [[F-type main-sequence star]] (designated υ Andromedae A, officially named '''Titawin''' in the [[Amazigh]] language {{IPAc-en|t|I|t|@|'|w|iː|n}}<!--the Berber allophone of /i/ before the pharyngealized C2 just happens to match the trisyllabic laxing expected for Latinized words-->) and a smaller [[red dwarf]].

{{As of|2015}}, three [[Exoplanet|extrasolar planet]]s (designated [[Upsilon Andromedae b]], [[Upsilon Andromedae c|c]], [[Upsilon Andromedae d|d]]; named Saffar, Samh and Majriti, respectively) are believed to orbit υ Andromedae A. All three are likely to be [[jovian planet]]s that are comparable in size to [[Jupiter]]. This was both the first multiple-[[planetary system|planet system]] to be discovered around a [[main-sequence star]], and the first multiple-planet system known in a multiple-[[star system]].