View source for Astronomy:SSSPM J1549-3544

{{Short description|Star}}
{{Starbox begin}}
{{Starbox observe
 | epoch=J2000 |
 | constell=[[Astronomy:Lupus (constellation)|Lupus]]
 | ra={{RA|15|48|40.172}}<ref name=dr3/>
 | dec={{DEC|-35|44|26.17}}<ref name=dr3/>
 | appmag_v=14.78<ref name="p2" />
}}
{{Starbox character
 | class=sdK5<ref name="p2">{{cite journal |bibcode=2005ApJ...627L..41F |title=SSSPM J1549-3544 is Not a White Dwarf |last1=Farihi |first1=J. |last2=Wood |first2=P. R. |last3=Stalder |first3=B. |journal=The Astrophysical Journal |year=2005 |volume=627 |issue=1 |pages=L41–L43 |doi=10.1086/432158 |arxiv=astro-ph/0505525 |s2cid=10645235 }}</ref>
}}
{{Starbox astrometry
| radial_v=
| prop_mo_ra=−597.714<ref name=dr3/>
| prop_mo_dec=−535.841<ref name=dr3/>
| parallax=10.4127
| p_error=0.0214
| parallax_footnote = <ref name=dr3>{{cite Gaia DR3|6011514923622712192}}</ref>
| absmag_v=9.5
}}
{{Starbox detail
| mass=
| radius=0.30<ref name=dr3/>
| luminosity=0.02<ref name=dr3/>
| temperature=3,956<ref name=dr3/>
| metal_fe=−1.28<ref name=dr3/>
| gravity=5.0<ref name=dr3/>
| rotation=
| age=
}}
{{Starbox catalog
 | names=SSSPM&nbsp;J1549-3544, 2MASS&nbsp;J15484023-3544254
}}
{{Starbox reference
 | Simbad=2MASS%20J15484023-3544254
}}
{{Starbox end}}

'''SSSPM J1549-3544''' is a [[Astronomy:Star|star]] in the [[Astronomy:Constellation|constellation]] [[Astronomy:Lupus (constellation)|Lupus]] with high [[Astronomy:Proper motion|proper motion]].  It was initially found to have high proper motion in a 2003 survey of images taken by the optical SuperCOSMOS Sky Surveys and by the near-infrared sky surveys [[Astronomy:2MASS|2MASS]] and DENIS.  It was then thought to be a cool [[Astronomy:White dwarf|white dwarf]] close to the [[Astronomy:Sun|Sun]].<ref name="p1">{{cite journal |bibcode=2004A&A...425..519S |title=The nearest cool white dwarf (D ∼4 pc), the coolest M-type subdwarf (SdM9.5), and other high proper motion discoveries |last1=Scholz |first1=R. -D |last2=Lehmann |first2=I. |last3=Matute |first3=I. |last4=Zinnecker |first4=H. |journal=Astronomy and Astrophysics |year=2004 |volume=425 |pages=519–527 |doi=10.1051/0004-6361:20041059 |arxiv=astro-ph/0406457 |s2cid=9352481 }}</ref>  However, more detailed spectroscopic observations in 2005 appear to show that it is not a white dwarf, but a high-velocity [[Astronomy:Galactic halo|halo]] [[Astronomy:Metallicity|metal-poor]] [[Astronomy:Subdwarf|subdwarf]].<ref name="p2" />

==References==
{{reflist}}

{{Stars of Lupus}}

[[Category:Lupus (constellation)]]



{{Sourceattribution|SSSPM J1549-3544}}