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{{Infobox planet
{{Planetbox begin
| name = ] (XO-2Bb) | name = ] (XO-2Bb)
⚫ | image = Exoplanet Comparison XO-2 b.png
⚫ | caption = Size comparison of XO-2 b (gray) with Jupiter.
<!-- DISCOVERY -->
⚫ | discoverer = Burke et al.
| discovered = 2007
⚫ | discovery_method = ] (including secondary eclipse)
<!-- DESIGNATIONS -->
<!-- ORBITAL -->
| apsis = astron
| semimajor = {{convert|0.0369|±|0.002|AU|km|abbr=on}}
⚫ | eccentricity = 0
⚫ | period = 2.61586178 ± 0.00000075<ref name="Sing2011"/> ]
⚫ | inclination = 87.62 ± 0.51<ref name="Sing2011"/>
⚫ | time_periastron = 2454147.74902 ± 0.00002
⚫ | arg_peri = ?
⚫ | semi-amplitude = 80.2
⚫ | star = ] (XO-2B)
<!-- PHYS CHARS -->
| mean_radius = 0.973 ± 0.03 {{Jupiter radius|link=y}}
| mass = 0.57 ± 0.06 {{Jupiter mass|link=y}}
| density = {{cvt|820|kg/m3|g/cm3|lk=on|disp=out}}{{fact|date=July 2024}}
| surface_grav = {{convert|1.42|m/s2|g0|lk=on|abbr=on}}{{fact|date=July 2024}}
| single_temperature = {{cvt|1208|K|C|lk=in}}
<!-- ATMOSPHERE -->
<!-- NOTES -->
}} }}
⚫ '''XO-2Nb''' (or rarely XO-2Bb) is an ] orbiting the ] ], the fainter component of XO-2 wide binary star in the ] ].<ref name="SIMBAD">{{cite simbad
{{Planetbox image
| title =XO-2b
⚫ | image = Exoplanet Comparison XO-2 b.png
⚫ | access-date=2009-04-26 }}</ref> This planet was found by the ] in 2007 by Burke et al. This was the second such planet found by the ].
⚫ | caption = Size comparison of XO-2 b (gray) with Jupiter.
}}
{{Planetbox star
⚫ | star = ] (XO-2B)
| constell = ]<ref name="Roman1987"/>
| RA = {{RA|07|48|06.468}} <ref name="Tycho-2"/>
| DEC = {{DEC|+50|13|32.96}} <ref name="Tycho-2"/>
| dist_ly = {{convert|148|+/-|10|pc|ly|disp=output number only}} <ref name="Torres2008"/>
| dist_pc = 148 ± 10 <ref name="Torres2008"/>
| class = K0V <ref name="Burke2007"/>
}}
{{Planetbox orbit
| semimajor = 0.0369 ± 0.002
⚫ | eccentricity = 0
⚫ | period = 2.61586178 ± 0.00000075<ref name="Sing2011"/>
⚫ | inclination = 87.62 ± 0.51<ref name="Sing2011"/>
⚫ | arg_peri = ?
⚫ | t_peri = 2454147.74902 ± 0.00002
⚫ | semi-amp = 80.2
}}
{{Planetbox character
| mass = 0.57 ± 0.06
| radius = 0.973 ± 0.03
| density = 820
| gravity = 1.42
| temperature = 1208
}}
{{Planetbox discovery
| discovery_date = 2007
⚫ | discoverers = Burke et al.
⚫ | discovery_method = ] (including secondary eclipse)
| detection_methods = Radial velocity
| discovery_status=Published
}}
{{Planetbox reference
| star=XO-2N
| planet=b
}}
{{Planetbox end}}

⚫ '''XO-2Nb''' (or rarely XO-2Bb) is an ] orbiting the ] ], the fainter component of XO-2 wide binary star in the ] ].<ref name="SIMBAD">{{cite web
| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident= XO-2 b
| title =SIMBAD query result:XO-2b -- Extra-solar Planet Candidate
| publisher=Centre de Données astronomiques de Strasbourg
⚫ | accessdate=2009-04-26 }}</ref> This planet was found by ] in 2007 by Burke et al. This was the second such planet found by the ].


] ]


Like most planets found by the transit method, it is a roughly ] sized planet that orbits very close to its host star; in this case, it has a surface ] of about 1200 ], so it belongs to a group of exoplanets known as ]s. The planet takes 2.6 days to orbit the star at the average distance of 0.0369 AU. The planet has mass of 57% of Jupiter and radius of 97% of Jupiter. The radius is relatively large for its mass, probably due to its intense heating from its nearby star that bloats the planet’s ]. The large radius for its mass gives a low density of 820&nbsp;kg/m<sup>3</sup>.<ref name="Burke2007"/> Like most planets found by the transit method, it is a roughly ] sized planet that orbits very close to its host star; in this case, it has a surface ] of about 1200 ], so it belongs to a group of exoplanets known as ]s. The planet takes 2.6 days to orbit the star at the average distance of 0.0369 AU. The planet has mass of 57% of Jupiter and radius of 97% of Jupiter. The radius is relatively large for its mass, probably due to its intense heating from its nearby star that bloats the planet's ]. The large radius for its mass gives a low density of 820&nbsp;kg/m<sup>3</sup>.<ref name="Burke2007"/>


==See also== ==See also==
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==References== ==References==
{{Reflist|colwidth=30em|refs= {{Reflist|refs=

⚫ <ref name="Burke2007">{{cite journal | title=XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary | url=http://iopscience.iop.org/0004-637X/671/2/2115/fulltext/ | last1=Burke | first1=Christopher J. | last2=McCullough | first2=P. R. | last3=Valenti | first3=Jeff A. | last4=Johns‐krull | first4=Christopher M. | last5=Janes | first5=Kenneth A. | last6=Heasley | first6=J. N. | last7=Summers | first7=F. J. | last8=Stys | first8=J. E. | last9=Bissinger | first9=R. | display-authors=1 | journal=The Astrophysical Journal | year=2007 | volume=671 | issue=2 | pages=2115–2128 | arxiv=0705.0003 | bibcode=2007ApJ...671.2115B | doi=10.1086/523087 }}</ref>

<ref name="Roman1987">{{cite journal | title=Identification of a Constellation From a Position | last1=Roman | first1=Nancy G. | journal=Publications of the Astronomical Society of the Pacific | volume=99 | issue=617 | pages=695–699 | year=1987 | bibcode=1987PASP...99..695R | doi=10.1086/132034 }} </ref>

<ref name="Sing2011">{{cite journal | title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry | last1=Sing | first1=D. K. | last2=Désert | first2=J.-M. | last3=Fortney | first3=J. J. | last4=Lecavelier Des Etangs | first4=A. | last5=Ballester | first5=G. E. | last6=Cepa | first6=J. | last7=Ehrenreich | first7=D. | last8=López-Morales | first8=M. | last9=Pont | first9=F. | display-authors=1 | journal=Astronomy and Astrophysics | year=2011 | volume=527 | at=article number A73 | arxiv=1008.4795 | bibcode=2011A&A...527A..73S | doi=10.1051/0004-6361/201015579 }}</ref>


<ref name="Torres2008">{{cite journal | title=Improved Parameters for Extrasolar Transiting Planets | url=http://iopscience.iop.org/0004-637X/677/2/1324/fulltext/ | last1=Torres | first1=Guillermo | last2=Winn | first2=Joshua N. | last3=Holman | first3=Matthew J. | display-authors=1 | journal=The Astrophysical Journal | year=2008 | volume=677 | issue=2 | pages=1324–1342 | arxiv=0801.1841 | bibcode=2008ApJ...677.1324T | doi=10.1086/529429 }}</ref> <ref name="Burke2007">{{cite journal | title=XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary | last1=Burke | first1=Christopher J. | last2=McCullough | first2=P. R. | last3=Valenti | first3=Jeff A. | last4=Johns‐krull | first4=Christopher M. | last5=Janes | first5=Kenneth A. | last6=Heasley | first6=J. N. | last7=Summers | first7=F. J. | last8=Stys | first8=J. E. | last9=Bissinger | first9=R. | display-authors=1 | journal=The Astrophysical Journal | year=2007 | volume=671 | issue=2 | pages=2115–2128 | arxiv=0705.0003 | bibcode=2007ApJ...671.2115B | doi=10.1086/523087 | s2cid=13468914 }}</ref>


⚫ <ref name="Sing2011">{{cite journal | title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry | last1=Sing | first1=D. K. | last2=Désert | first2=J.-M. | last3=Fortney | first3=J. J. | last4=Lecavelier Des Etangs | first4=A. | last5=Ballester | first5=G. E. | last6=Cepa | first6=J. | last7=Ehrenreich | first7=D. | last8=López-Morales | first8=M. | last9=Pont | first9=F. | display-authors=1 | journal=Astronomy and Astrophysics | year=2011 | volume=527 | at=article number A73 | arxiv=1008.4795 | bibcode=2011A&A...527A..73S | doi=10.1051/0004-6361/201015579 | s2cid=56545385 }}</ref>
<ref name="Tycho-2">{{cite web | url=http://vizier.u-strasbg.fr/viz-bin/VizieR-S?TYC%203413-5-1 | title=Tyc 3413-5-1 | work=The Tycho-2 Catalogue | author=Hog ''et al.'' | year=2000 | accessdate=2012-01-07 }}</ref>


}} }}
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{{Sky|07|48|07|+|50|13|33|486}} {{Sky|07|48|07|+|50|13|33|486}}


]
] ]
] ]
] ]
] ]
] ]

Latest revision as of 22:42, 29 July 2024

XO-2Nb (XO-2Bb)
Size comparison of XO-2 b (gray) with Jupiter.
Discovery
Discovered byBurke et al.
Discovery date2007
Detection methodTransit (including secondary eclipse)
Orbital characteristics
Semi-major axis0.0369 ± 0.002 AU (5,520,000 ± 300,000 km)
Eccentricity0
Orbital period (sidereal)2.61586178 ± 0.00000075 d
Inclination87.62 ± 0.51
Time of periastron2454147.74902 ± 0.00002
Argument of periastron?
Semi-amplitude80.2
StarXO-2N (XO-2B)
Physical characteristics
Mean radius0.973 ± 0.03 RJ
Mass0.57 ± 0.06 MJ
Mean density0.82 g/cm
Surface gravity1.42 m/s (0.145 g0)
Temperature1,208 K (935 °C)

XO-2Nb (or rarely XO-2Bb) is an extrasolar planet orbiting the star XO-2N, the fainter component of XO-2 wide binary star in the constellation Lynx. This planet was found by the transit method in 2007 by Burke et al. This was the second such planet found by the XO telescope.

The radial velocity of XO-2 over time, caused by the presence of XO-2 b.

Like most planets found by the transit method, it is a roughly Jupiter sized planet that orbits very close to its host star; in this case, it has a surface temperature of about 1200 K, so it belongs to a group of exoplanets known as hot Jupiters. The planet takes 2.6 days to orbit the star at the average distance of 0.0369 AU. The planet has mass of 57% of Jupiter and radius of 97% of Jupiter. The radius is relatively large for its mass, probably due to its intense heating from its nearby star that bloats the planet's atmosphere. The large radius for its mass gives a low density of 820 kg/m.

See also

References

  1. ^ Sing, D. K.; et al. (2011). "Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry". Astronomy and Astrophysics. 527. article number A73. arXiv:1008.4795. Bibcode:2011A&A...527A..73S. doi:10.1051/0004-6361/201015579. S2CID 56545385.
  2. "XO-2b". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-26.
  3. Burke, Christopher J.; et al. (2007). "XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary". The Astrophysical Journal. 671 (2): 2115–2128. arXiv:0705.0003. Bibcode:2007ApJ...671.2115B. doi:10.1086/523087. S2CID 13468914.

External links

Media related to XO-2b at Wikimedia Commons


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