ULAS J003402.77−005206.7

{{Short description|Brown dwarf star in the constellation Cetus}}

{{Starbox begin

| name = ULAS J003402.77-005206.7}}

{{Starbox image

| image = 250px

| caption = ULAS J0034-00 (red object in the center)

| credit = legacy surveys

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Cetus

| ra = {{RA|00|34|02.771}}{{SIMBAD link|ULAS+J003402.77-005206.7|CFBDS J003402.77-005206.7 -- Brown Dwarf (M<0.08solMass)}}, database entry, SIMBAD. Accessed on line June 24, 2009.

| dec = {{DEC|−00|52|06.78}}

}}

{{Starbox character

| class = Y0

}}

{{Starbox astrometry

|parallax=79.6

|p_error=3.8

|parallax_footnote={{r|Faherty2012}}

}}

{{Starbox detail

| source=

| temperature = 550–600

| gravity = 4.0–4.5

| mass = 0.005–0.019

| age_gyr = 0.1–2.0

}}

{{Starbox reference

| Simbad=ULAS+J003402.77-005206.7}}

{{Starbox catalog

| names=ULAS J003402.77-005206.7
ULAS J0034-00}}

{{Starbox end}}

ULAS J003402.77-005206.7 (also ULAS J0034-00) is a T9-type{{Cite journal |last1=Suárez |first1=Genaro |last2=Metchev |first2=Stanimir |date=2022-07-01 |title=Ultracool dwarfs observed with the Spitzer infrared spectrograph - II. Emergence and sedimentation of silicate clouds in L dwarfs, and analysis of the full M5-T9 field dwarf spectroscopic sample |journal=Monthly Notices of the Royal Astronomical Society |volume=513 |issue=4 |pages=5701–5726 |doi=10.1093/mnras/stac1205 |doi-access=free |issn=0035-8711|arxiv=2205.00168 |bibcode=2022MNRAS.513.5701S }} brown dwarf in the constellation of Cetus.

ULAS J0034-00 is one of the coolest brown dwarfs known. It was first identified in data from the UK Infrared Telescope (UKIRT) Infrared

Deep Sky Survey (UKIDSS). Infrared spectra subsequently taken with the IRS instrument on the Spitzer Space Telescope give an estimated effective temperature of between 550 and 600 K and does not emit any visible light. Its mass is estimated at between 5 and 20 Jupiter masses and its age at between 0.1 and 2.0 billion years.{{cite journal |doi=10.1088/0004-637X/695/2/1517 |last1=Leggett |first1=Sandy K. |last2=Cushing |first2=Michael C. |last3=Saumon |first3=Didier |last4=Marley |first4=Mark S. |last5=Roellig |first5=Thomas L. |last6=Warren |first6=Stephen J. |last7=Burningham |first7=Ben |last8=Jones |first8=Hugh R. A. |last9=Kirkpatrick |first9=J. Davy |last10=Lodieu |first10=Nicolas |last11=Lucas |first11=Philip W. |last12=Mainzer |first12=Amy K. |last13=Martín |first13=Eduardo L. |last14=McCaughrean |first14=Mark J. |last15=Pinfield |first15=David J. |last16=Sloan |first16=Gregory C. |last17=Smart |first17=Richard L. |last18=Tamura |first18=Motohide |last19=Van Cleve |first19=Jeffrey E. |title=The Physical Properties of Four ~600 K T Dwarfs |date=2009 |journal=The Astrophysical Journal |volume=695 |issue=2 |pages=1517–1526 |arxiv=0901.4093 |bibcode=2009ApJ...695.1517L |s2cid=44050900 }}