XO-5

{{Starbox begin

| name = XO-5 / Absolutno

}}

{{Starbox observe

| epoch = J2000

| constell = Lynx

| ra = {{RA|07|46|51.9615}}

| dec = {{DEC|+39|05|40.461}}

| appmag_v = 12.13 ± 0.03

}}

{{Starbox character

| class = G8V + M

| appmag_1_passband = V

| appmag_1 = 12.13 ± 0.03

| appmag_2_passband = R

| appmag_2 = 11.844

| appmag_3_passband = J

| appmag_3 = 10.774 ± 0.019

| appmag_4_passband = H

| appmag_4 = 10.443 ± 0.021

| appmag_5_passband = K

| appmag_5 = 10.345 ± 0.018

}}

{{Starbox astrometry

| radial_v = {{val|-9.47|0.65}}

| prop_mo_ra = {{val|−21.509|(18)}}

| prop_mo_dec = {{val|−23.910|(13)}}

| pm_footnote =

| parallax = 3.6517

| p_error = 0.0173

| parallax_footnote =

| absmag_v = 5.06 ± 0.12

}}

{{Starbox detail

| mass = {{val|1.04|0.03}}

| radius = {{val|1.13|0.03}}

| gravity = {{val|4.35|0.02}}

| luminosity = {{val|0.88|0.09}}

| temperature = {{val|5430|70}}

| metal_fe = {{val|+0.05|0.06}}

| rotation =

| rotational_velocity = {{val|0.7|0.5}}

| age_gyr = {{val|7.0|7.0}}

}}

{{Starbox catalog

| names = {{odlist | name=Absolutno | 2MASS=J07465196+3905404 | GSC=02959-00729 | TIC=9155187 | TOI=5373}}, UCAC2 45499774

}}

{{Starbox reference

| Simbad = XO-5

| NSTED = XO-5

}}

XO-5 is a likely binary star system, made up of a G-type dwarf and a red dwarf companion, located approximately 893 light-years away from Earth in the Lynx constellation. It has a magnitude of about 12 and cannot be seen with the naked eye but is visible through a small telescope.

XO-5 has a suspected red dwarf companion with a temperature of 3500{{±|250|150}} K, on a wide orbit.{{citation|arxiv=1510.08062|year=2015|doi=10.1088/0004-637X/814/2/148|last1=Piskorz|first1=Danielle|last2=Knutson|first2=Heather A.|last3=Ngo|first3=Henry|last4=Muirhead|first4=Philip S.|last5=Batygin|first5=Konstantin|last6=Crepp|first6=Justin R.|last7=Hinkley|first7=Sasha|last8=Morton|first8=Timothy D.|title=Friends of Hot Jupiters. III. An Infrared Spectroscopic Search for Low-Mass Stellar Companions|journal=The Astrophysical Journal|volume=814|issue=2|page=148|bibcode=2015ApJ...814..148P|s2cid=11525988}} A 2024 study also identified it as a very likely binary star, with 94% probability.

The star XO-5 is named Absolutno. The name was selected in the NameExoWorlds campaign by the Czech Republic, during the 100th anniversary of the IAU. Absolutno is a fictional miraculous substance in the Czech sci-fi novel Továrna na absolutno (The Factory for the Absolute).{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}

Planetary system

File:Exoplanet Comparison XO-5 b.png

The exoplanet XO-5b was discovered by the XO Telescope using the transit method in 2008. This planet is classified as a hot Jupiter. A search for transit timing variations caused by additional planets was negative.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b / Makropulos

| mass = {{val|1.19|0.03}}

| period = {{val|4.1877558|(6)}}

| semimajor = {{val|0.0515|0.0005}}

| eccentricity = 0

| inclination = {{val|86.8|0.2}}

| radius = {{val|1.14|0.03}}

}}

Notes

{{reflist|group="note"|refs=

{{refn|name="eccentricity"|group="note"|eccentricity is insignificant compared to its uncertainties}}

}}

References

{{Reflist|refs=

{{Cite journal |last1=Jing |first1=Yingjie |last2=Mao |first2=Tian-Xiang |last3=Wang |first3=Jie |last4=Liu |first4=Chao |last5=Chen |first5=Xiaodian |title=Half a Million Binary Stars Identified from the Low-resolution Spectra of LAMOST |journal=The Astrophysical Journal Supplement Series |date=2025 |volume=277 |issue=1 |page=15 |doi=10.3847/1538-4365/ada895 |doi-access=free |arxiv=2411.03994|bibcode=2025ApJS..277...15J }} Note: See [https://www.scidb.cn/en/detail?dataSetId=c09cbb947204413bbd95bedf0776f9c8 external tables]

{{cite web | url=http://vizier.u-strasbg.fr/viz-bin/VizieR-S?2MASS%20J07465196%2b3905404 | title=2MASS===07465196+3905404 | work=2MASS All-Sky Catalog of Point Sources | author=Cutri | display-authors=etal | year=2003 | access-date=2012-02-20 }}

{{cite journal | title=XO-5b: A Transiting Jupiter-sized Planet with a 4 day Period | last1=Burke | first1=Christopher J. | last2=McCullough | first2=P. R. | last3=Valenti | first3=Jeff A. | last4=Long | first4=Doug | last5=Johns-Krull | first5=Christopher M. | last6=Machalek | first6=P. | last7=Janes | first7=Kenneth A. | last8=Taylor | first8=B. | last9=Fleenor | first9=Michael L. | display-authors=1 | journal=The Astrophysical Journal | year=2008 | volume=686 | issue=2 | pages=1331–1340 | arxiv=0805.2399 | bibcode=2008ApJ...686.1331B | doi=10.1086/591497 | s2cid=14043772 }}

{{cite journal | title=Refining Parameters of the XO-5 Planetary System with High-Precision Transit Photometry | url=http://acta.astrouw.edu.pl/Vol61/n1/pdf/pap_61_1_2.pdf | last1=Maciejewski | first1=G. | last2=Seeliger | first2=M. | last3=Adam | first3=Ch. | last4=Raetz | first4=St. | last5=Neuhäuser | first5=R. | display-authors=1 | journal=Acta Astronomica | volume=61 | issue=1 | pages=25–35 | year=2011 | arxiv=1103.1325 | bibcode=2011AcA....61...25M }}

{{cite journal | title=Independent Confirmation and Refined Parameters of the Hot Jupiter XO-5b | last1=Pál | first1=A. | last2=Bakos | first2=G. Á. | last3=Fernandez | first3=J. | last4=Sipőcz | first4=B. | last5=Torres | first5=G. | last6=Latham | first6=D. W. | last7=Kovács | first7=Géza | last8=Noyes | first8=R. W. | last9=Marcy | first9=G. W. | display-authors=1 | journal=The Astrophysical Journal | volume=700 | issue=1 | pages=783–790 | year=2009 | arxiv=0810.0260 | bibcode=2009ApJ...700..783P | doi=10.1088/0004-637X/700/1/783 | s2cid=18318327 }}

{{cite simbad | title=GSC 02959-00729 | access-date=2009-04-26 }}

{{cite web | url=http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ4f43ef201ab7&-out.add=.&-source=I/315/out&3UC===259-099032 | title=3UC===259-099032 | work=Third U.S. Naval Observatory CCD Astrograph Catalog | author=Zacharias | display-authors=etal | year=2009 | access-date=2012-02-21 }}

{{cite journal |last1=Smith |first1=A. M. S. |date=March 2015 |title=The Properties of XO-5b and WASP-82b Redetermined Using New High-Precision Transit Photometry and Global Data Analyses |journal=Acta Astronomica |volume=65 |issue= |pages=117 |arxiv=1412.0451 |bibcode=2015AcA....65..117S}}

{{cite journal |last1=Bonomo |first1=A. S. |last2=Desidera |first2=S. |display-authors=etal |date=June 2017 |title=The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets |journal=Astronomy & Astrophysics |volume=602 |issue= |pages=A107 |doi=10.1051/0004-6361/201629882 |arxiv=1704.00373 |bibcode=2017A&A...602A.107B}}

}}

External links

{{cite web

| url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=XO-5

| title=XO-5

| work=Exoplanets

| access-date=2009-04-28

| archive-date=2016-03-03

| archive-url=https://web.archive.org/web/20160303183421/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=XO-5

| url-status=dead

}}

Category:G-type main-sequence stars

Category:Lynx (constellation)

Category:Planetary transit variables

Category:Planetary systems with one confirmed planet

Absolutno

5373

9155187