XO-1

{{Starbox begin

| name = XO-1 / Moldoveanu

}}

{{Starbox image

| image = 250px

| caption = This artist's impression shows a dramatic close-up of the extrasolar planet XO-1b passing in front of a Sun-like star 600 light-years from Earth. The Jupiter-sized planet is in a tight four-day orbit around the star.

| credit = NASA, ESA and G. Bacon (STScI)

}}

{{Starbox observe

| epoch = J2000.0

| constell = Corona Borealis

| ra = {{RA|16|02|11.8462}}

| dec = {{DEC|+28|10|10.420}}

| appmag_v = 11.19 ± 0.03

}}

{{Starbox character

| class = G1V

| appmag_1_passband = B

| appmag_1 = 11.85 ± 0.04

| appmag_2_passband = V

| appmag_2 = 11.19 ± 0.03

| appmag_3_passband = J

| appmag_3 = 9.939 ± 0.022

| appmag_4_passband = H

| appmag_4 = 9.601 ± 0.017

| appmag_5_passband = K

| appmag_5 = 9.527 ± 0.015

| variable = Planetary transit variable

}}

{{Starbox astrometry

| radial_v = {{val|2.49|0.32}}

| prop_mo_ra = {{val|−17.349|(12)}}

| prop_mo_dec = {{val|14.780|(15)}}

| pm_footnote =

| parallax = 6.1489

| p_error = 0.0136

| parallax_footnote =

| absmag_v = 5.02{{±|0.14|0.16}}

}}

{{Starbox detail

| mass = 1.027{{±|0.057|0.061}}

| radius = 0.94 ± 0.02

| luminosity = 0.86{{±|0.12|0.10}}

| gravity = 4.50 ± 0.01

| temperature = 5738 ± 65

| metal_fe = −0.06 ± 0.07

| rotational_velocity = 1.1 ± 1.0

| age_gyr = 1.0{{±|3.1|0.9}}

}}

{{Starbox catalog

| names = {{odlist | name=Moldoveanu | 2MASS=J16021184+2810105 | BD=+28 2507 | GSC=02041-01657 | TYC=2041-1657-1 | TIC=236312126 | TOI=2021}}

}}

{{Starbox reference

| Simbad = XO-1

| NSTED = XO-1

}}

XO-1 is a magnitude 11 G-type main-sequence star located approximately 530 light-years away in the constellation Corona Borealis. XO-1 has a mass and radius similar to the Sun.

In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope.

The star XO-1 is named Moldoveanu. The name was selected in the NameExoWorlds campaign by Romania, during the 100th anniversary of the IAU. Moldoveanu is the highest peak in Romania.{{cite web |url=http://www.nameexoworlds.iau.org/romania |url-status=dead |archive-url=https://web.archive.org/web/20191218192546/http://www.nameexoworlds.iau.org/romania |archive-date=2019-12-18 |title=Romania {{!}} NameExoworlds}}{{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

The XO Project is an international team of professional and amateur astronomers which discovered the Jupiter-sized planet orbiting around XO-1. The team, led by Peter R. McCullough of the Space Telescope Science Institute in Baltimore, includes four amateur astronomers from North America and Europe. The planet was confirmed using the Harlan J. Smith Telescope and Hobby-Eberly Telescope at McDonald Observatory of the University of Texas. An independent confirmation of the planet was made by the Wide Angle Search for Planets project. In 2019, the planet was named Negoiu, after Negoiu Peak in Romania.

Further observations with the NICMOS instrument on board the Hubble Space Telescope detected the presence of water vapor, methane, and carbon dioxide in the atmosphere of XO-1b. However an independent reinvestigation of the same data was unable to reproduce these results.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b / Negoiu

| mass = {{val|0.907|0.022}}

| semimajor = {{val|0.04914|0.00045}}

| period = {{val|3.94150514|(20)}}

| eccentricity = {{val|0.019|p=<}}

| inclination = {{val|88.84|0.22}}

| radius = {{val|1.199|0.017}}

}}

References

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{{cite simbad | title=TYC 2041-1657-1 | access-date=2018-10-14 }}

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{{cite journal | title=SuperWASP Observations of the Transiting Extrasolar Planet XO-1b | last1=Wilson | first1=D. M. | last2=Enoch | first2=B. | last3=Christian | first3=D. J. | last4=Clarkson | first4=W. I. | last5=Collier Cameron | first5=A. | last6=Deeg | first6=H. J. | last7=Evans | first7=A. | last8=Haswell | first8=C. A. | last9=Hellier | first9=C. | last10=Hodgkin | first10=S. T. | last11=Horne | first11=K. | last12=Irwin | first12=J. | last13=Kane | first13=S. R. | last14=Lister | first14=T. A. | last15=Maxted | first15=P. F. L. | last16=Norton | first16=A. J. | last17=Pollacco | first17=D. | last18=Skillen | first18=I. | last19=Street | first19=R. A. | last20=West | first20=R. G. | last21=Wheatley | first21=P. J. | display-authors=1 | journal=The Publications of the Astronomical Society of the Pacific | volume=118 | issue=847 | pages=1245–1251 | year=2006 | arxiv=astro-ph/0607591 | bibcode=2006PASP..118.1245W | bibcode-access=free | doi=10.1086/507957 | doi-access=free | s2cid=118916713 }}

}}

External links

[http://www.spacedaily.com/reports/Astronomers_Catch_Planet_By_Unusual_Means.html SpaceDaily: Astronomers Catch Planet By Unusual Means (May 19, 2006)]
{{cite web

| url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=XO-1

| title=XO-1

| work=Exoplanets

| access-date=2009-04-28

| archive-date=2016-03-03

| archive-url=https://web.archive.org/web/20160303230425/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=XO-1

| url-status=dead

}}

Category:Corona Borealis

Category:G-type main-sequence stars

Category:Planetary transit variables

Category:Planetary systems with one confirmed planet