K2-172 Overview

K2-172 0.87 R_⦿ 5569.00 K

K2-172 b

0.149 R_Jup

K2-172 c

0.286 R_Jup

Overview Notes 1 Parameters Nearby Data Bibliography 9 Legend Expand All

K2-172 Architecture & Discovery Information

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
K2-172
K2-172 b	14.32 d	1.67 R_⨁	Transit	2018	Mayo et al. 2018	Confirmed Planet
K2-172 c	29.63 d	3.21 R_⨁	Transit	2018	Mayo et al. 2018	Confirmed Planet

Exoplanet Archive Notes (1)

K2-172 c

Typo in Table 2; transit durations mis-reported in hours. See literature discrepancies page. (Schmitt et al. 2016)

K2-172 Stellar Parameters (7 Solutions)

RA: 22h21m13.95s

Dec: -12d33m25.13s

Distance: 249.742+2.942-2.876
pc

Parallax: 3.975970±0.046282 mas

Ecliptic Latitude: -2.13639 deg

Ecliptic Longitude: 332.55088 deg

Galactic Latitude: -51.9848 deg

Galactic Longitude: 47.92889 deg

Total Proper Motion: 56.0911787±0.0856007 mas/yr

Proper Motion (RA): -52.9323000±0.0866974 mas/yr

Proper Motion (Dec): -18.5578000±0.0760931 mas/yr

Photometry: m_V
12.50±0.08; m_TESS
11.7920±0.0061; m_J
11.098±0.024; m_H
10.760±0.023; m_Ks
10.661±0.019; m_Kep
12.308; m_W1
10.631±0.023; m_W2
10.679±0.021; m_W3
10.529±0.100; m_W4
8.495±0.340; m_Gaia
12.280900±0.000235; m_B
13.191±0.026

Abundances (Hypatia Catalog): [Fe/H] -0.14±0.04 dex; [C/H] -0.12±0.09 dex

Mission: K2 : Observed in Campaign 3

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; K2 Names; K2 Planets and Candidates; K2 Targets; Stellar Hosts; K2 Time Series

Source	TICv8	Gaia DR2	Mayo et al. 2018	Kruse et al. 2019	Kruse et al. 2019	Schmitt et al. 2016	Vanderburg et al. 2016
T_eff (K)	5547.000+120.228-127.026	5564.00+382.14-181.00	5569.0±50.0	---	---	---	5449
Metallicity (dex)	---	---	-0.06±0.08 [Fe/H]	---	---	---	---
M_✶ (M_⦿)	0.9770000+0.1145230-0.1268350	---	0.934356 +0.025884-0.026995	---	---	---	---
R_✶ (R_⦿)	0.8579490+0.0413151-0.0477955	0.82353806+0.05631300-0.10245100	0.868889 +0.038272-0.029057	0.824 +0.102-0.056	0.824 +0.102-0.056	---	0.86
log g (log₁₀(cm/s²))	4.5610400+0.0556859-0.0968785	---	4.61±0.1	---	---	---	---
L_✶ (log₁₀(L_⦿))	-0.2021502+0.0159414-0.0143585	-0.23238942+0.00703366-0.00714942	---	---	---	---	---
γ (km/s)	---	22.444124352976445±0.830626486593375	---	---	---	---	---
ρ_✶ (g/cm³)	2.1811000+0.5294814-0.4084112	---	---	---	---	---	---

K2-172 b Planetary Parameters (3 Solutions)

Status: Confirmed Planet

Detected By: Transit

Tools: Planetary Systems; Transit Prediction Service; K2 Names; K2 Planets and Candidates; Transit

Source	Mayo et al. 2018	Kruse et al. 2019	Vanderburg et al. 2016
b	---	---	0.00
P (days)	14.316941 +0.001445-0.001411	14.3181 +0.0017-0.0016	14.317001
R_p (R_⨁)	1.66608078922 +0.159594885664-0.0952304336092	1.69 +0.24-0.28	1.8
R_p (R_Jup)	0.1486377723 +0.0142381020-0.0084958902	0.151 +0.021-0.025	0.161
R_p/R_✶	0.017579 +0.001495-0.000815	0.0188 +0.0012-0.0028	0.01714
δ (%)	---	0.0375 +0.002-0.0021	0.0364
T₁₄ (hours)	---	3.84000+0.19200-0.28800	3.90000
T_C (days)	2456982.29487 +0.003444-0.003431	2456982.2891 +0.0042-0.0046 (BJD)	2456982.295 (BJD)
a/R_✶	25.147602 +3.117793-8.474158	25.0 +9.7-4.2	---
i (deg)	88.913519 +0.780488-1.720420	---	---

K2-172 c Planetary Parameters (4 Solutions)

Status: Confirmed Planet

Detected By: Transit

Tools: Planetary Systems; Transit Prediction Service; K2 Names; K2 Planets and Candidates; Transit

Source	Mayo et al. 2018	Kruse et al. 2019	Schmitt et al. 2016	Vanderburg et al. 2016
a/R_✶	44.208935 +3.396005-7.766886	43.1 +7.7-3.6	36.8 +9.9-11.9	---
b	---	---	0.09 +0.74-0.86	0.25
i (deg)	89.497255 +0.348449-0.527766	---	89.0 +0.7-1.0	---
P (days)	29.626820 +0.001555-0.001607	29.6245 +0.0016-0.0015	29.626 +0.0016-0.0017	29.626402
R_p/R_✶	0.033824 +0.001324-0.000936	0.0336 +0.0013-0.0025	0.0348 +0.0036-0.0022	0.03282
T₁₄ (hours)	---	4.99200+0.12000-0.12000	4.65600+0.14400-0.09600	4.92000
T_C (days)	2456993.53984 +0.001098-0.001154	2456993.541 +0.0011-0.0013 (BJD)	2456993.5402±0.0011 (BJD)	2456993.540 (BJD)
R_p (R_⨁)	3.2056909733 +0.188901591219-0.139117676478	3.02 +0.39-0.30	---	3.41
R_p (R_Jup)	0.2859925929 +0.0168526712-0.0124112478	0.269 +0.035-0.03	---	0.304
δ (%)	---	0.1302 +0.0026-0.0027	---	0.131

Nearby Data (within 30 arcseconds) Browse Nearby Data

+

Known Objects: 2 Confirmed Planets; 1 K2 Targets; 1 2MASS Point Source Catalog

Data Files: 1 K2 Time Series; 2 Associated Literature Data

Bibliography (9 References)

The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Detection of Hundreds of New Planet Candidates and Eclipsing Binaries in K2 Campaigns 0-8
Kruse et al. 2019 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
275 Candidates and 149 Validated Planets Orbiting Bright Stars in K2 Campaigns 0-10
Mayo et al. 2018 Reference Overview
Planet Hunters. X. Searching for Nearby Neighbors of 75 Planet and Eclipsing Binary Candidates from the K2 Kepler extended mission
Schmitt et al. 2016 Reference Overview
The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
EPIC Catalog Reference Overview
Planetary Candidates from the First Year of the K2 Mission
Vanderburg et al. 2016 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview

System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

Aliases
Data Access
Transit Prediction Service
Time Series
Kepler | K2

External Link
Search
Browse
Download