XO-2 | NASA Exoplanet Archive

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
XO-2 N
XO-2 N b	2.62 d	> 188.79 M_⨁	Transit	2007	Burke et al. 2007	Confirmed Planet
XO-2 S
XO-2 S b	18.22 d	> 82.64 M_⨁	Radial Velocity	2014	Desidera et al. 2014	Confirmed Planet
XO-2 S c	120.06 d	> 438.6 M_⨁	Radial Velocity	2014	Desidera et al. 2014	Confirmed Planet
XO-2 S d	4696 d	> 1179.14 M_⨁	Radial Velocity	2024	Ruggieri et al. 2024	Confirmed Planet

Exoplanet Archive Notes (4)

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XO-2

This reference contains discussion regarding the stellar multiplicity of this system. (Damasso et al. 2015)
This reference contains discussion regarding the stellar multiplicity of this system. (Mugrauer 2019)

XO-2 N

The Iron-line-only with Solar Reference model is chosen since it includes uncertainties. (Ramírez et al. 2015)

XO-2 S

The Iron-line-only with Solar Reference model is chosen since it includes uncertainties. (Ramírez et al. 2015)

XO-2 N Stellar Parameters (18 Solutions)

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RA: 07h48m06.42s

Dec: +50d13m30.53s

Distance: 154.273+1.459-1.433
pc

Parallax: 6.4539500±0.0602777 mas

Ecliptic Latitude: 28.58414 deg

Ecliptic Longitude: 109.32981 deg

Galactic Latitude: 29.32831 deg

Galactic Longitude: 168.28983 deg

Total Proper Motion: 157.1107895±0.0516932 mas/yr

Proper Motion (RA): -29.7313000±0.0825528 mas/yr

Proper Motion (Dec): -154.2720000±0.0501829 mas/yr

Photometry: m_V
11.246±0.011; m_TESS
10.4467±0.0061; m_J
9.744±0.022; m_H
9.340±0.026; m_Ks
9.308±0.021; m_W1
9.240±0.022; m_W2
9.310±0.019; m_W3
9.236±0.038; m_W4
8.833±0.443; m_Ic
10.243±0.012; m_Gaia
10.971800±0.000514; m_B
11.947±0.161; m_g
14.8008000±0.0100065; m_i
10.8006000±0.0004149; m_r
14.4984000±0.0114432; m_u
14.9353000±0.0067085; m_z
13.0957000±0.0152614

Abundances (Hypatia Catalog): [Fe/H] 0.41±0.06 dex; [C/H] 0.44±0.10 dex; [O/H] 0.29±0.03 dex; [Na/H] 0.35±0.03 dex; [Mg/H] 0.34±0.06 dex; [Al/H] 0.35±0.04 dex; [Si/H] 0.34±0.06 dex; [Ca/H] 0.40±0.02 dex; [Y/H] 0.27±0.08 dex; [BaII/H] 0.39±0.19 dex

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; TOI; Stellar Hosts

Source	Yalçınkaya et al. 2024	Ruggieri et al. 2024	TICv8	Gaia DR2	Bonomo et al. 2017	Zellem et al. 2015	Ramírez et al. 2015	Damasso et al. 2015	Knutson et al. 2014	Mortier et al. 2013	Teske et al. 2013	Crouzet et al. 2012	Southworth 2012	Southworth 2010	Fernandez et al. 2009	Torres et al. 2008	Burke et al. 2007	ExoFOP
T_eff (K)	5340±32	5290±18	5267.000+190.150-115.327	5167.900+80.133-106.500	5332±57	5343	5307±19	5332±57	---	5350±72	5343±78	---	5340±50	5340±50	---	5340±80	---	5267.0±152.7
L_✶ (log₁₀(L_⦿))	---	---	-0.08823480+0.02141575-0.01451242	-0.10751163+0.00530122-0.00536674	---	---	---	-0.155 +0.024-0.026	---	---	---	---	---	---	---	-0.162±0.049	---	---
Metallicity (dex)	---	0.37±0.07 [Fe/H]	0.38±0.10 [M/H]	---	0.430±0.050	0.39 [Fe/H]	0.41±0.02 [Fe/H]	0.43±0.05 [Fe/H]	0.35±0.08 [Fe/H]	0.42±0.07 [Fe/H]	0.39±0.14 [Fe/H]	---	0.45±0.05 [Fe/H]	0.45±0.05 [Fe/H]	---	---	---	---
ρ_✶ (g/cm³)	---	---	0.99574060+0.29120950-0.27233610	---	---	---	---	---	---	1.03±0.09	---	1.410+0.040-0.039	1.457+0.179-0.082	1.461+0.180-0.082	---	---	---	---
M_✶ (M_⦿)	---	0.960±0.050	0.9020000+0.1321010-0.0971225	---	0.960±0.050	---	---	0.97±0.05	0.98±0.02	1.08±0.13	---	0.971	0.9240+0.0930-0.1740	0.9460+0.0710-0.0770	0.971±0.034	---	---	---
R_✶ (R_⦿)	---	0.9980±0.0330	1.0849500+0.0869678-0.0690573	1.1022209+0.0468730-0.0334030	0.9980±0.0330	0.964	---	1.01 +0.1-0.07	---	1.48±0.51	---	0.990±0.009	0.9620+0.0370-0.0700	0.9700+0.0330-0.0410	0.976±0.024	---	---	1.08±0.08
log g (log₁₀(cm/s²))	---	4.43±0.10	4.322460+0.106443-0.091619	---	---	4.49	4.30±0.05	4.44±0.08	---	4.14±0.22	4.49±0.25	4.433±0.008	4.436+0.039-0.040	4.440+0.038-0.023	---	---	---	4.32±0.10
γ (km/s)	---	---	---	47.682192406248646±0.240100362850442	---	---	---	46.9329±0.0017	---	---	---	---	---	---	---	---	---	---
v sin i (km/s)	---	---	---	---	1.070±0.090	---	---	1.07±0.09	---	---	---	---	---	---	---	---	---	---
Age (Gyr)	---	---	---	---	7.8+1.2-1.3	---	---	7.9 +2.3-3.0	---	---	---	---	6.50+23.80-5.20	1.9+6.5-2.7	---	---	---	---
P_rot (days)	---	---	---	---	28.6±1.3	---	---	---	---	---	---	---	---	---	---	---	---	---
Sp. T	---	G8 V	---	---	---	---	---	---	---	---	---	---	---	---	---	---	K0 V	---

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XO-2 N b Planetary Parameters (16 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity, Transit

Tools: Planetary Systems; Transit Prediction Service; TOI; Transit; Atmospheric Spectroscopy

Source	Ruggieri et al. 2024	Yalçınkaya et al. 2024	Kokori et al. 2023	Ivshina & Winn 2022	Kokori et al. 2022	Bonomo et al. 2017	Zellem et al. 2015	Baluev et al. 2015	Damasso et al. 2015	Knutson et al. 2014	Crouzet et al. 2012	Southworth 2012	Southworth 2010	Fernandez et al. 2009	Torres et al. 2008	ExoFOP
a/R_✶	---	---	7.93+0.10-0.09	---	---	---	7.986	---	---	---	7.986+0.074-0.073	8.0841+0.3193-0.1539	8.0841+0.3193-0.1539	---	8.2+0.1-0.2	---
e	0	---	---	---	---	<0.0060	0	---	<0.006	0.028+0.038-0.022	---	---	---	---	---	---
i (deg)	---	---	88.0+0.4-0.3	---	---	87.96+0.42-0.34	88.01	---	---	---	88.01+0.33-0.28	88.8±1.2	88.8±1.2	---	88.90+0.60-0.75	---
P (days)	2.615859060±0.000000252	2.615859462±0.000000054	2.61585982±0.00000017	2.61585906±0.00000025	2.61585978±0.00000019	2.61585922±0.00000028	2.61586178	2.61585779±0.00000043	2.61585922±0.00000028	---	2.61586178	2.6158640±0.0000016	2.6158640±0.0000016	2.6158640±0.0000016	2.615857	2.6158597±0.0000009
T_C (days)	---	2458843.218463±0.000069 (BJD-TDB)	2457417.57469±0.00013 (BJD-TDB)	2456737.45107±0.00020 (BJD-TDB)	2456923.17711±0.00015 (BJD-TDB)	2455565.546480±0.000054 (BJD-TDB)	---	2455139.16092±0.00013 (BJD-TDB)	2455565.546480±0.000054 (BJD-TDB)	---	2454508.73829+0.00014-0.00016 (HJD)	---	---	2454466.88467±0.00012 (HJD)	---	2459957.5744120±0.0002035 (BJD)
M_p (M_⨁)	---	---	---	---	---	189+7-7	---	---	189.737±6.674	200±5	180±8	188+13-25	176+21-20	179.566±17.162	180±17	---
M_p (M_Jup)	---	---	---	---	---	0.595+0.022-0.021	---	---	0.597±0.021	0.629±0.017	0.566±0.025	0.593+0.041-0.079	0.555+0.065-0.062	0.565±0.054	0.566±0.055	---
ρ (g/cm³)	---	---	---	---	---	0.698+0.073-0.066	---	---	0.70 +0.072-0.064	---	0.715+0.041-0.040	0.77406+0.15827-0.06517	0.75677+0.15960-0.09709	---	0.741+0.100-0.091	---
R_p (R_⨁)	---	---	---	---	---	11.42±0.35	---	---	11.422±0.347	---	11.13±0.13	11.03+0.46-0.94	11.12+0.44-0.68	11.164 +0.347-0.202	11.02+0.33-0.31	13.120400±0.946292
R_p (R_Jup)	---	---	---	---	---	1.019±0.031	---	---	1.019±0.031	---	0.9930±0.0120	0.9840+0.0410-0.0840	0.9920+0.0390-0.0610	0.996 +0.031-0.018	0.9830+0.0290-0.0280	1.1705257±0.0844227
K (m/s)	90.0±1.0	---	---	---	---	90.17±0.82	---	---	90.17±0.82	93.9+2.1-2.2	---	92.2±1.7	85±8	---	85±8	---
a (au)	0.03666±0.00065	---	---	---	---	0.03665±0.00064	---	---	0.03673±0.00064	---	0.0368	0.03616+0.00119-0.00247	0.03647+0.00091-0.00100	0.0368±0.0004	0.03684+0.00040-0.00043	---
λ (deg)	---	---	---	---	---	---	---	---	7±11	---	---	---	---	---	---	---
ψ (deg)	---	---	---	---	---	---	---	---	27 +12-27	---	---	---	---	---	---	---
T_p (days)	2458843.2176±0.0003 (BJD)	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
ω (deg)	90	---	---	---	---	---	---	---	---	261+11-71	---	---	---	---	---	---
M_p sin i (M_⨁)	189±7	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
M_p sin i (M_Jup)	0.594±0.022	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
T_eq (K)	---	---	---	---	---	---	---	---	---	---	---	1328+17-28	1328+17-28	---	1319+24-23	1267
b	---	---	---	---	---	---	---	0.0894	---	---	0.280+0.036-0.044	---	---	---	0.158+0.110-0.085	---
R_p/R_✶	---	---	0.1049±0.0006	---	---	---	---	0.1036±0.0013	---	---	0.10304±0.00037	---	---	---	0.10395+0.00090-0.00085	---
T₁₄ (hours)	---	---	---	---	---	---	---	2.6712±0.0154	---	---	2.6839+0.0066-0.0077	---	---	---	---	2.517±0.060
δ (%)	---	---	---	---	---	---	---	---	---	---	---	---	---	1.099 +0.015-0.013	---	1.3363000±0.0135919
S (S_⨁)	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	428.036

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XO-2 S Stellar Parameters (8 Solutions)

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RA: 07h48m07.43s

Dec: +50d13m00.86s

Distance: 151.398+0.955-0.944
pc

Parallax: 6.5765500±0.0411226 mas

Ecliptic Latitude: 28.57663 deg

Ecliptic Longitude: 109.33474 deg

Galactic Latitude: 29.3298 deg

Galactic Longitude: 168.29963 deg

Total Proper Motion: 157.1566271±0.0445912 mas/yr

Proper Motion (RA): -29.3166000±0.0627735 mas/yr

Proper Motion (Dec): -154.3980000±0.0437949 mas/yr

Photometry: m_V
11.196±0.012; m_TESS
10.4164±0.0061; m_J
9.742±0.022; m_H
9.371±0.027; m_Ks
9.272±0.021; m_W1
9.239±0.022; m_W2
9.306±0.019; m_W3
9.272±0.041; m_W4
8.256; m_Ic
10.216±0.013; m_Gaia
10.927800±0.000421; m_B
12.051±0.162; m_g
10.9208000±0.0003161; m_i
14.5936000±0.0125255; m_r
10.9759000±0.0005358; m_u
14.7371000±0.0062489; m_z
11.0220000±0.0021831

Abundances (Hypatia Catalog): [Fe/H] 0.32±0.02 dex; [C/H] 0.31±0.06 dex; [O/H] 0.24±0.08 dex; [Na/H] 0.35±0.02 dex; [Mg/H] 0.36±0.06 dex; [Al/H] 0.30±0.04 dex; [Si/H] 0.36±0.08 dex; [Ca/H] 0.35±0.02 dex; [Y/H] 0.19±0.08 dex; [BaII/H] 0.31±0.19 dex

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; Stellar Hosts

Source	Ruggieri et al. 2024	TICv8	Gaia DR2	Stassun et al. 2017	Ramírez et al. 2015	Damasso et al. 2015	Desidera et al. 2014	Teske et al. 2013
T_eff (K)	5325±37	5547.000+118.141-114.646	5444.175+102.825-179.725	5399±55	5374±16	---	5399±55	5547±59
Metallicity (dex)	0.32±0.08 [Fe/H]	0.28±0.14 [M/H]	---	0.39 [Fe/H]	0.35±0.02 [Fe/H]	---	0.39±0.05 [Fe/H]	0.28±0.14 [Fe/H]
log g (log₁₀(cm/s²))	4.420±0.094	4.4606600+0.0796017-0.0721716	---	4.43±0.08	4.33±0.04	---	4.43±0.08	4.22±0.24
M_✶ (M_⦿)	0.980±0.050	0.9770000+0.1184070-0.1184690	---	0.980±0.200	---	---	0.982±0.054	---
R_✶ (R_⦿)	1.02±0.09	0.96305000+0.05062060-0.04593720	0.975617650+0.067750900-0.035835000	1.00±0.04	---	---	1.02 +0.09-0.07	---
L_✶ (log₁₀(L_⦿))	---	-0.1017747+0.0142648-0.0142618	-0.1230177+0.0039235-0.0039593	---	---	---	---	---
γ (km/s)	---	---	46.84828798172646±0.44187266439643	---	---	---	46.543±0.001	---
v sin i (km/s)	---	---	---	---	---	1.5±0.3	1.7±0.4	---
Age (Gyr)	---	---	---	---	---	---	7.1 +2.5-2.9	---
ρ_✶ (g/cm³)	---	1.5420962+0.3580479-0.2909473	---	---	---	---	---	---
Sp. T	G8 V	---	---	---	---	---	---	---

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XO-2 S b Planetary Parameters (3 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Ruggieri et al. 2024	Stassun et al. 2017	Desidera et al. 2014
M_p sin i (M_⨁)	83±3	83±13	82.315±4.449
M_p sin i (M_Jup)	0.26±0.01	0.26±0.04	0.259±0.014
e	0.15±0.02	0.18±0.04	0.180±0.035
P (days)	18.220±0.001	18.15700±0.03400	18.157±0.034
K (m/s)	20.40±0.43	20.6±0.9	20.64±0.85
a (au)	0.1347±0.0025	0.13±0.00	0.1344±0.0025
T_p (days)	2458834.8±0.4 (BJD)	---	2456413.11 +0.82-0.86
ω (deg)	-59.1±7.0	---	311.9±9.5

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XO-2 S c Planetary Parameters (2 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Ruggieri et al. 2024	Desidera et al. 2014
T_p (days)	2458813.3±1.0 (BJD)	2456408.1 +1.8-1.9
ω (deg)	-88.6±2.8	264.5±4.9
M_p sin i (M_⨁)	439±16	435.409±16.844
M_p sin i (M_Jup)	1.38±0.05	1.370±0.053
e	0.149±0.006	0.1528 +0.0094-0.0098
P (days)	120.059±0.013	120.80±0.34
K (m/s)	58.0±0.4	57.68±0.69
a (au)	0.4737+0.0085-0.0088	0.4756±0.0087

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XO-2 S d Planetary Parameters (1 Solution)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Ruggieri et al. 2024
T_p (days)	2459923+131-489 (BJD)
ω (deg)	115+22-50
M_p sin i (M_⨁)	1179+381-162
M_p sin i (M_Jup)	3.71+1.20-0.51
e	0.0910+0.0280-0.0180
i (deg)	>4
P (days)	4696+1133-489
K (m/s)	45.6+10.0-4.4
a (au)	5.46+0.85-0.40

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Ancillary Information (45 Unique Files)

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+ XO-2 N (3 File Types, 45 Files)

Literature Time Series (3 File Types, 45 Files)

File Type	Data Points	Filter	Reference
Photometric Light Curve	593	Clear, no filter	Fernandez et al. 2009
Photometric Light Curve	516	z (Sloan)	Fernandez et al. 2009
Photometric Light Curve	465	z (Sloan)	Fernandez et al. 2009
Photometric Light Curve	450	z (Sloan)	Fernandez et al. 2009
Photometric Light Curve	425	z (Sloan)	Fernandez et al. 2009
Photometric Light Curve	181	z (Sloan)	Fernandez et al. 2009
Photometric Light Curve	76	B (Johnson)	Burke et al. 2007
Photometric Light Curve	13	B (Johnson)	Burke et al. 2007
Photometric Light Curve	499	BB (XO)	Burke et al. 2007
Photometric Light Curve	229	Clear, no filter	Burke et al. 2007
Photometric Light Curve	45	Clear, no filter	Burke et al. 2007
Photometric Light Curve	163	Ic (Cousins)	Burke et al. 2007
Photometric Light Curve	13	Ic (Cousins)	Burke et al. 2007
Photometric Light Curve	734	Rc (Cousins)	Burke et al. 2007
Photometric Light Curve	715	Rc (Cousins)	Burke et al. 2007
Photometric Light Curve	675	Rc (Cousins)	Burke et al. 2007
Photometric Light Curve	519	Rc (Cousins)	Burke et al. 2007
Photometric Light Curve	392	Rc (Cousins)	Burke et al. 2007
Photometric Light Curve	222	Rc (Cousins)	Burke et al. 2007
Photometric Light Curve	344	V (Johnson)	Burke et al. 2007
Photometric Light Curve	162	V (Johnson)	Burke et al. 2007
Photometric Light Curve	13	V (Johnson)	Burke et al. 2007
Photometric Light Curve	1619	W (XO)	Burke et al. 2007
Photometric Light Curve	1404	W (XO)	Burke et al. 2007
Photometric Light Curve	7936	Clear, no filter	SuperWASP Consortium
Radial Velocity Curve	30	Optical Spectra	Thomas et al. 2016
Radial Velocity Curve	30	Optical Spectra	Thomas et al. 2016
Radial Velocity Curve	16	Optical Spectra	Burke et al. 2007
Amateur Light Curve	464	B (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	568	Clear, no filter	Amateur-Contributed Light Curves
Amateur Light Curve	352	Clear, no filter	Amateur-Contributed Light Curves
Amateur Light Curve	269	Clear, no filter	Amateur-Contributed Light Curves
Amateur Light Curve	217	Clear, no filter	Amateur-Contributed Light Curves
Amateur Light Curve	216	Clear, no filter	Amateur-Contributed Light Curves
Amateur Light Curve	165	Clear, no filter	Amateur-Contributed Light Curves
Amateur Light Curve	519	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	439	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	275	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	194	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	190	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	180	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	148	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	65	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	53	R (Generic)	Amateur-Contributed Light Curves
Amateur Light Curve	36	R (Generic)	Amateur-Contributed Light Curves

XO-2 N Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 1 Confirmed Planets; 2 2MASS Point Source Catalog

Data Files: 2 SuperWASP Time Series; 1 Associated Literature Data

XO-2 S Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 1 Confirmed Planets; 2 2MASS Point Source Catalog

Data Files: 2 SuperWASP Time Series; 1 Associated Literature Data

Bibliography (34 References)

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Looking for timing variations in the transits of 16 exoplanets
Yalçınkaya et al. 2024 Reference Overview
The GAPS Programme at TNG. LIII. New insights on the peculiar XO-2 system
Ruggieri et al. 2024 Reference Overview
ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations
Kokori et al. 2023 Reference Overview
Emergent Spectral Fluxes of Hot Jupiters: An Abrupt Rise in Dayside Brightness Temperature Under Strong Irradiation
Deming et al. 2023 Reference Overview
TESS Transit Timing of Hundreds of Hot Jupiters
Ivshina & Winn 2022 Reference Overview
ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides
Kokori et al. 2022 Reference Overview
Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release
Mugrauer 2019 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Ground-based Spectroscopy of the Exoplanet XO-2b Using a Systematic Wavelength Calibration
Pearson et al. 2019 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
ExoFOP TOI Table
ExoFOP
The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets
Bonomo et al. 2017 Reference Overview
Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes
Stassun et al. 2017 Reference Overview
MARVELS 1D Pipeline Development, Optimization, and Performance
Thomas et al. 2016 Reference Overview
XO-2b: A Hot Jupiter with a Variable Host Star That Potentially Affects Its Measured Transit Depth
Zellem et al. 2015 Reference Overview
The Dissimilar Chemical Composition of the Planet-hosting Stars of the XO-2 Binary System
Ramírez et al. 2015 Reference Overview
Benchmarking the power of amateur observatories for TTV exoplanets detection
Baluev et al. 2015 Reference Overview
The GAPS programme with HARPS-N at TNG. V. A comprehensive analysis of the XO-2 stellar and planetary systems
Damasso et al. 2015 Reference Overview
The GAPS programme with HARPS-N at TNG. IV. A planetary system around XO-2S
Desidera et al. 2014 Reference Overview
Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
Knutson et al. 2014 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
New and updated stellar parameters for 90 transit hosts. The effect of the surface gravity
Mortier et al. 2013 Reference Overview
Carbon and Oxygen Abundances in the Hot Jupiter Exoplanet Host Star XO-2B and Its Binary Companion
Teske et al. 2013 Reference Overview
Transmission Spectroscopy of Exoplanet XO-2b Observed with Hubble Space Telescope NICMOS
Crouzet et al. 2012 Reference Overview
Homogeneous studies of transiting extrasolar planets - V. New results for 38 planets
Southworth 2012 Reference Overview
Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry
Sing et al. 2011 Reference Overview
Homogeneous studies of transiting extrasolar planets - III. Additional planets and stellar models
Southworth 2010 Reference Overview
Exoplanet Archive Help: Amateur Light Curves
Amateur-Contributed Light Curves
Detection of Thermal Emission of XO-2b: Evidence for a Weak Temperature Inversion
Machalek et al. 2009 Reference Overview
The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b
Fernandez et al. 2009 Reference Overview
Improved Parameters for Extrasolar Transiting Planets
Torres et al. 2008 Reference Overview
XO-2b: Transiting Hot Jupiter in a Metal-Rich Common Proper Motion Binary
Burke et al. 2007 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview
SuperWASP: Wide Angle Search for Planets
SuperWASP Consortium

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False Positive Planet
Controversial
False Positive

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Kepler | K2

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XO-2 Overview

XO-2 Architecture & Discovery Information