KOI-8238 | NASA Exoplanet Archive

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
KOI-8238
KOI-8238.01	495.66 d	---	Transit	2017	Q1-Q17 DR25 KOI Table	Candidate Planet

KOI-8238 Stellar Parameters (4 Solutions)

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RA: 19h16m21.82s

Dec: +51d31m55.67s

Distance: 696.443+10.264-9.975
pc

Parallax: 1.407200±0.020703 mas

Ecliptic Latitude: 72.21083 deg

Ecliptic Longitude: 311.75215 deg

Galactic Latitude: 17.27278 deg

Galactic Longitude: 82.57058 deg

Total Proper Motion: 28.4691528±0.0338310 mas/yr

Proper Motion (RA): 11.8616000±0.0368638 mas/yr

Proper Motion (Dec): 25.8804000±0.0331587 mas/yr

Photometry: m_V
14.553±0.137; m_TESS
13.8153±0.0078; m_J
13.067±0.022; m_H
12.697±0.029; m_Ks
12.608±0.025; m_Kep
14.322; m_W1
12.421±0.023; m_W2
12.490±0.022; m_W3
12.160±0.197; m_W4
9.581; m_Gaia
14.337300±0.000282; m_B
15.704±0.067; m_g
14.888; m_i
14.079; m_r
14.275; m_z
13.982

Mission

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; KOI; Kepler Stellar Data; Kepler Positional Probabilities; Q1-Q17 DR25 False Positive Probabilities; Kepler Certified False Positive; Q1-Q16 DR25 TCE; Kepler Time Series; Kepler TCE Time Series

Source	TICv8	Latham et al. 2005	Q1-Q17 DR25 Supplemental KOI Table	Q1-Q17 DR25 KOI Table
T_eff (K)	5403.0±122.0	5311	---	5515±193
Metallicity (dex)	---	-0.343 [Fe/H]	---	-0.34 +0.35-0.3 [Fe/H]
R_✶ (R_⦿)	1.00161	0.906	---	0.82 +0.17-0.099
log g (log₁₀(cm/s²))	4.4098	4.52	---	4.509 +0.077-0.132
L_✶ (log₁₀(L_⦿))	-0.1133685	---	---	---
ρ_✶ (g/cm³)	1.3188587	---	---	3.13843 +99.19381-1.62880
M_✶ (M_⦿)	0.94	---	---	0.791 +0.108-0.063

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KOI-8238.01 Candidate Planet Parameters (2 Solutions)

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Status: Candidate Planet
Detected By: Transit

Tools: Transit Prediction Service; KOI

Source	Q1-Q17 DR25 Supplemental KOI Table	Q1-Q17 DR25 KOI Table
P (days)	495.662346±0.006736	495.662346±0.006736
T_C (days)	2455394.413±0.00823	2455394.413±0.00823
a/R_✶	---	344±170
T_eq (K)	---	207
b	---	0.949 +0.018-0.679
S (S_⨁)	---	0.43 +0.29-0.14
e	---	0
i (deg)	---	89.84
R_p (R_⨁)	---	2.73 +0.56-0.33
R_p (R_Jup)	---	0.244+0.050-0.029
R_p/R_✶	---	0.030468 +0.001593-0.008092
a (au)	---	1.1347
δ (%)	---	0.06757±0.00776
T₁₄ (hours)	---	4.428±0.35

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Ancillary Information (7 Unique Files, 2 Candidate Records)

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+ KOI-8238 (4 File Types, 7 Files)

Kepler Detection Products (4 File Types, 7 Files)

Kepler Pipeline Data Validation Reports	q1_q17_dr25_tce
Kepler Pipeline Data Validation Summaries	q1_q17_dr25_tce
Kepler TCERT Reports	q1_q17_dr25_tce
Kepler Planet Detection Metrics	q1_q17_dr24_stellar	q1_q17_dr24_stellar	q1_q17_dr25_stellar	q1_q17_dr25_stellar

+ KOI-8238.01 (1 File Type, 1 File)

Kepler Detection Products

Kepler Pipeline Data Validation Summaries	q1_q17_dr25_tce

Kepler Object of Interest

+ KOI-8238.01 (2 Candidate Records)

KepID	12554485	12554485
KOI Name	K08238.01	K08238.01
Exoplanet Archive Disposition	CANDIDATE	CANDIDATE
Vetting Status	Done	Done
Date of Last Parameter Update	2018-08-16	2017-08-31
Disposition Using Kepler Data	CANDIDATE	CANDIDATE
Not Transit-Like False Positive Flag	0	0
Stellar Eclipse False Positive Flag	0	0
Centroid Offset False Positive Flag	0	0
Ephemeris Match Indicates Contamination False Positive Flag	0	0
Disposition Provenance	q1_q17_dr25_sup_koi	q1_q17_dr25_koi
Orbital Period [days]	495.662346±0.006736	495.662346±0.006736
Transit Epoch [BKJD]	561.4127±0.00823	561.4127±0.00823
Transit Epoch [BJD]	2455394.413±0.00823	2455394.413±0.00823
Parameters Provenance	q1_q17_dr25_sup_koi	q1_q17_dr25_koi
Number of Planets	1	1
TCE Delivery	q1_q17_dr25_tce	q1_q17_dr25_tce
Link to DV Report	kplr012554485-20160209194854_dvr.pdf	kplr012554485-20160209194854_dvr.pdf
RA [decimal degrees]	289.09082	289.09082
Dec [decimal degrees]	51.532008999999995	51.532008999999995
Kepler-band [mag]	14.322000000000001	14.322000000000001
g'-band [mag]	14.888	14.888
r'-band [mag]	14.275	14.275
i'-band [mag]	14.079	14.079
z'-band [mag]	13.982000000000001	13.982000000000001
J-band [mag]	13.067	13.067
H-band [mag]	12.697000000000001	12.697000000000001
K-band [mag]	12.608	12.608
Disposition Score	---	0.444
Comment	---	CENT_FEW_DIFFS
Eccentricity	---	0
Impact Parameter	---	0.949 +0.018-0.679
Transit Duration [hrs]	---	4.428±0.35
Transit Depth [ppm]	---	675.7±77.6
Planet-Star Radius Ratio	---	0.030468 +0.001593-0.008092
Fitted Stellar Density [g/cm**3]	---	3.13843 +99.19381-1.62880
Planetary Fit Type	---	LS+MCMC
Planetary Radius [Earth radii]	---	2.73 +0.56-0.33
Orbit Semi-Major Axis [au]	---	1.1347
Inclination [deg]	---	89.84
Equilibrium Temperature [K]	---	207
Insolation Flux [Earth flux]	---	0.43 +0.29-0.14
Planet-Star Distance over Star Radius	---	344±170
Limb Darkening Model	---	Claret (2011 A&A 529 75) ATLAS LS
Limb Darkening Coeff. 4	---	0.0
Limb Darkening Coeff. 3	---	0.0
Limb Darkening Coeff. 2	---	0.2521
Limb Darkening Coeff. 1	---	0.42100000000000004
Maximum Single Event Statistic	---	5.451124
Maximum Multiple Event Statistic	---	8.735097999999999
Transit Signal-to-Noise	---	10.200000000000001
Number of Transits	---	3
TCE Planet Number	---	1
Quarters	---	00011111111111111000000000000000
Odd-Even Depth Comparision Statistic	---	0.7302000000000001
Transit Model	---	Mandel and Agol (2002 ApJ 580 171)
Link to DV Summary	---	kplr012554485-001-20160209194854_dvs.pdf
Stellar Effective Temperature [K]	---	5515±193
Stellar Surface Gravity [log10(cm/s**2)]	---	4.509 +0.077-0.132
Stellar Metallicity [dex]	---	-0.34 +0.35-0.3
Stellar Radius [Solar radii]	---	0.82 +0.17-0.099
Stellar Mass [Solar mass]	---	0.791 +0.108-0.063
Stellar Parameter Provenance	---	q1_q17_dr25_stellar
FW Offset Significance [percent]	---	0.08800000000000001
FW Source α(OOT) [hrs]	---	19.272702±0.000037
FW Source δ(OOT) [deg]	---	51.53152±0.0004
FW Source Δα(OOT) [sec]	---	-0.7±1.2
FW Source Δδ(OOT) [arcsec]	---	-1.8±1.4
FW Δα(OOT) [sec]	---	0.0003±0.00085
FW Δδ(OOT) [arcsec]	---	0.00106±0.00099
PRF Δα_SQ(OOT) [arcsec]	---	-0.29±0.31
PRF Δδ_SQ(OOT) [arcsec]	---	-0.14±0.34
PRF Δθ_SQ(OOT) [arcsec]	---	0.32±0.31
PRF Δα_SQ(KIC) [arcsec]	---	-0.25±0.31
PRF Δδ_SQ(KIC) [arcsec]	---	0.26±0.34
PRF Δθ_SQ(KIC) [arcsec]	---	0.36±0.32

Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 1 Kepler Objects of Interest (KOIs); 1 Threshold Crossing Events (TCEs); 4 2MASS Point Source Catalog

Data Files: 2 Kepler Time Series; 2 SuperWASP Time Series

Bibliography (6 References)

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The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Kepler KOI delivery, Q1-Q17 DR25 supplement
Q1-Q17 DR25 Supplemental KOI Table
Kepler KOI delivery, Q1-Q17 DR25
Q1-Q17 DR25 KOI Table
All WISE Data Release
Cutri et al. 2014 Reference Overview
The Kepler Input Catalog
Latham et al. 2005 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview

Legend

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System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

Aliases
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Transit Prediction Service
Time Series
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KOI-8238 Overview

KOI-8238 Architecture & Discovery Information