U Microscopii

{{Short description|Star in the constellation Microscopium}}

{{Starbox begin

| name=U Microscopii

}}

{{Starbox image

| image = 250px

| caption = The visual band light curve of U Microscopii, from AAVSO data

}}

{{Starbox observe

| epoch=J2000

| ra={{RA|20|29|15.77460}}{{cite journal | first=F. | last=van Leeuwen | title=Validation of the New Hipparcos Reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–64 | date=2007 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752| s2cid=18759600 }}

| dec={{DEC|−40|25|01.3084}}

| appmag_v=7.0 - 14.4 {{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}

| constell=Microscopium

}}

{{Starbox character

| class=M5e-M7e

| b-v=

| u-b=

| variable=Mira

}}

{{Starbox astrometry

| radial_v=−54.00{{cite journal|bibcode=1993BICDS..43....5T|title=Version 2 of the HIPPARCOS Input Catalogue|journal=Bull. Inf. Cent. Donnees Astron. Strasbourg 43|volume=43|display-authors=etal|last1=Turon|first1=C.|last2=Creze|first2=M.|last3=Egret|first3=D.|last4=Gomez|first4=A.|last5=Grenon|first5=M.|last6=Jahreiß|first6=H.|last7=Requieme|first7=Y.|last8=Argue|first8=A. N.|last9=Bec-Borsenberger|first9=A.|last10=Dommanget|first10=J.|last11=Mennessier|first11=M. O.|last12=Arenou|first12=F.|last13=Chareton|first13=M.|last14=Crifo|first14=F.|last15=Mermilliod|first15=J. C.|last16=Morin|first16=D.|last17=Nicolet|first17=B.|last18=Nys|first18=O.|last19=Prevot|first19=L.|last20=Rousseau|first20=M.|last21=Perryman|first21=M. A. C.|year=1993|page=5}}

| prop_mo_ra=−13.68

| prop_mo_dec=−24.38

| parallax=1.5546

| p_error=0.1456

| parallax_footnote = {{cite DR2|6680697732008334336}}

| absmag_v= }}

{{Starbox detail

| mass=

| radius=

| luminosity=7,900{{cite journal|bibcode=2010A&A...510A..62U|title=Correlation between technetium and lithium in a sample of oxygen-rich AGB variables|journal=Astronomy and Astrophysics|volume=510|pages=A62|last1=Uttenthaler|first1=S.|last2=Lebzelter|first2=T.|year=2010|doi=10.1051/0004-6361/200912548|arxiv = 0911.3507 |s2cid=119231142}}

| temperature= 2,995{{cite journal|bibcode= 2012MNRAS.427..343M|title= Fundamental parameters and infrared excesses of Hipparcos stars|journal= Monthly Notices of the Royal Astronomical Society|volume= 427|pages= 343–357|last1= McDonald|first1= I.|last2= Zijlstra|first2= A. A.|last3= Boyer|first3= M. L.|year= 2012|issue= 1|doi= 10.1111/j.1365-2966.2012.21873.x|doi-access= free|arxiv = 1208.2037 |s2cid= 118665352}}

| metal=

| rotation=

| age=

}}

{{Starbox catalog

| names= U Microscopii, HIP 101063, HD 194814, CD−40°13888

}}

{{Starbox reference

|Simbad = U+Mic

}}

{{Starbox end}}

U Microscopii is a Mira variable star in the constellation Microscopium. It ranges from magnitude 7 to 14.4 over a period of 334 days.{{cite web|url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=19963 |title=U Microscopii |author =Watson, Christopher |date=4 January 2010 |work=AAVSO Website|publisher=American Association of Variable Star Observers|access-date=24 March 2015}} The Astronomical Society of Southern Africa in 2003 reported that observations of U Microscopii were very urgently needed as data on its light curve was incomplete.{{cite journal|last=Cooper|first=Tim|date=2003|title=Presidential address: Amateur Observations - Successes and Opportunities|journal=Monthly Notes of the Astronomical Society of Southern Africa|volume=62|pages=234–40|bibcode=2003MNSSA..62..234C}}