K2-146 | NASA Exoplanet Archive

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
K2-146
K2-146 b	2.64 d	2.05 R_⨁	Transit	2018	Hirano et al. 2018	Confirmed Planet
K2-146 c	4 d	2.19 R_⨁	Transit	2019	Hamann et al. 2019	Confirmed Planet

Exoplanet Archive Notes (1)

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K2-146 c

Planet also independently announced in this ref. (Lam et al. 2020)

K2-146 Stellar Parameters (11 Solutions)

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RA: 08h40m06.41s

Dec: +19d05m32.43s

Distance: 79.3002+0.4780-0.4723
pc

Parallax: 12.5821000±0.0749898 mas

Ecliptic Latitude: .70247 deg

Ecliptic Longitude: 127.42763 deg

Galactic Latitude: 32.21884 deg

Galactic Longitude: 206.52797 deg

Total Proper Motion: 129.9980836±0.0777051 mas/yr

Proper Motion (RA): -15.916700±0.117628 mas/yr

Proper Motion (Dec): -129.0200000±0.0769376 mas/yr

Photometry: m_V
16.7±0.2; m_TESS
13.7247000±0.0073796; m_J
12.183±0.021; m_H
11.605±0.018; m_Ks
11.370±0.023; m_Kep
15.031; m_W1
11.175±0.023; m_W2
11.030±0.021; m_W3
10.980±0.191; m_W4
8.451; m_Gaia
14.983400±0.000523; m_B
17.873±0.168

Mission: K2 : Observed in Campaigns 5, 16, 18

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

Source	Lam et al. 2020	TICv8	Hamann et al. 2019	Livingston et al. 2018	Gaia DR2	Hirano et al. 2018	Kruse et al. 2019	Petigura et al. 2018	Dressing et al. 2017	Libralato et al. 2016	Pope et al. 2016
T_eff (K)	3385±70	3359.0±157.0	3385±70	3398±47	3679.00+370.46-421.00	3385±70	---	---	---	---	---
L_✶ (log₁₀(L_⦿))	-1.8+0.1-0.1	-1.91475+0.09670-0.12459	---	---	---	-1.8+0.1-0.1	---	---	---	---	---
Metallicity (dex)	-0.020±0.120 [Fe/H]	---	---	-0.010±0.150 [Fe/H]	---	-0.020±0.120 [Fe/H]	---	---	---	---	---
M_✶ (M_⦿)	0.358±0.042	0.3061610±0.0203377	0.331±0.009	0.33±0.01	---	0.358±0.042	---	---	---	---	---
R_✶ (R_⦿)	0.350±0.035	0.3257290±0.0099422	0.330±0.010	0.33±0.01	---	0.350±0.035	0.226 +0.040-0.049	0.50	---	0.225	---
log g (log₁₀(cm/s²))	4.906±0.041	4.8983000±0.0023719	---	4.92±0.01	---	4.906±0.041	---	---	---	---	---
Sp. T	M3.0 V	---	---	---	---	M3.0 V	---	---	---	---	---
ρ_✶ (g/cm³)	---	12.4895384±0.3128997	13.1±1.1	2.352+5.371-2.030	---	---	---	---	---	---	---
Age (Gyr)	---	---	5+4-2	---	---	---	---	---	---	---	---
γ (km/s)	40.6±0.2	---	---	---	---	---	---	---	---	---	---
v sin i (km/s)	<2.00	---	---	---	---	---	---	---	---	---	---

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K2-146 b Planetary Parameters (9 Solutions)

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Status: Confirmed Planet

Detected By: Transit Timing Variations, Transit

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

Source	Hamann et al. 2019	Lam et al. 2020	Livingston et al. 2018	Hirano et al. 2018	Kruse et al. 2019	Petigura et al. 2018	Dressing et al. 2017	Libralato et al. 2016	Pope et al. 2016
a/R_✶	---	15.250±0.126	9.540+5.310-4.080	15.5+0.9-2.5	14.0 +4.2-2.4	---	14.03	---	---
b	---	0.391±0.069	0.800+0.190-0.470	---	---	1.13 +0.52-0.29	---	---	0
ω (deg)	-64±6	191+11-15	---	---	---	---	---	---	---
M_p (M_⨁)	5.77±0.18	5.6±0.7	---	---	---	---	---	---	---
M_p (M_Jup)	0.01816±0.00024	0.018±0.002	---	---	---	---	---	---	---
e	0.129±0.019	0.14±0.07	---	---	---	---	---	---	---
i (deg)	88.93±0.11	88.5±0.3	---	---	---	---	88.79	90.00±0.12	---
P (days)	2.64460±0.00006	2.6698±0.0001	2.644661+0.000132-0.000130	2.644646±0.000043	2.643528 +0.000058-0.000061	2.644845 +0.000128-0.000137	2.64484±0.00011	2.644259±0.000047	2.645
ρ (g/cm³)	3.69±0.21	2.702±0.494	---	---	---	---	---	---	---
R_p (R_⨁)	2.05±0.06	2.25±0.10	2.15±0.86	2.20±0.23	1.47 +0.28-0.37	10.7 +24.3-8.4	1.83 +0.25-0.21	1.38	---
R_p (R_Jup)	0.183±0.005	0.201±0.009	0.192±0.077	0.196±0.021	0.131 +0.025-0.033	0.95 +2.17-0.75	0.163 +0.022-0.019	0.123	---
R_p/R_✶	0.0572±0.0005	0.0589±0.0014	0.05980+0.04240-0.00630	0.0577+0.0021-0.0012	0.0595 +0.0043-0.0079	0.1951 +0.4378-0.1330	0.052 +0.002-0.001	0.0563±0.0005	0.048634
a (au)	---	0.0248±0.0002	0.0259±0.0002	0.0266±0.0010	---	---	---	---	---
T_C (days)	2458204.5902±0.0005 (BJD)	2458300.4345±0.0007 (BJD)	2457144.64233+0.00169-0.00176 (BJD)	2457139.35327±0.00085 (BJD)	2457142.00628 +0.00085-0.00077 (BJD)	2457144.64143 +0.001724-0.001696 (BJD)	2457144.641±0.001 (BJD)	2457142.002608±0.000650 (BJD)	2457141.999 (BJD)
δ (%)	---	---	---	---	0.386 +0.011-0.012	---	---	0.3274±0.0167	0.2365
S (S_⨁)	---	---	---	20.7±4.8	---	---	---	---	---
T₁₄ (hours)	---	---	---	---	1.32000+0.07200-0.10800	1.53120+0.24960-1.53120	---	---	1.40400
T_eq (K)	---	---	534±10	---	---	---	---	---	---

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K2-146 c Planetary Parameters (2 Solutions)

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Status: Confirmed Planet

Detected By: Transit Timing Variations, Transit

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

Source	Hamann et al. 2019	Lam et al. 2020
a/R_✶	---	20.064±0.412
b	---	0.9300±0.0970
ω (deg)	130±5	2.0+12.0-10.0
M_p (M_⨁)	7.49±0.24	7.1±0.9
M_p (M_Jup)	0.02358±0.00031	0.022±0.003
e	0.075±0.016	0.16±0.07
i (deg)	87.54±0.04	87.3±0.3
P (days)	4.00498±0.00011	3.96630+0.00020-0.00002
ρ (g/cm³)	3.92±0.27	2.246+1.883-1.846
R_p (R_⨁)	2.19±0.07	2.59+1.81-0.39
R_p (R_Jup)	0.195±0.006	0.231+0.161-0.035
R_p/R_✶	0.0612±0.0009	0.06800+0.12260-0.02540
a (au)	---	0.0327±0.0006
T_C (days)	2458204.1316±0.0007 (BJD)	2458299.6019±0.0009 (BJD)

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Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 2 Confirmed Planets; 3 K2 Targets; 1 2MASS Point Source Catalog

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

Bibliography (14 References)

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It Takes Two Planets in Resonance to Tango around K2-146
Lam et al. 2020 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
K2-146: Discovery of Planet c, Precise Masses from Transit Timing, and Observed Precession
Hamann et al. 2019 Reference Overview
Detection of Hundreds of New Planet Candidates and Eclipsing Binaries in K2 Campaigns 0-8
Kruse et al. 2019 Reference Overview
Sixty Validated Planets from K2 Campaigns 5-8
Livingston et al. 2018 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
Exoplanets around Low-mass Stars Unveiled by K2
Hirano et al. 2018 Reference Overview
Planet Candidates from K2 Campaigns 5─8 and Follow-up Optical Spectroscopy
Petigura et al. 2018 Reference Overview
Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. II. Planetary Systems Observed During Campaigns 1-7
Dressing et al. 2017 Reference Overview
A PSF-based approach to Kepler/K2 data - II. Exoplanet candidates in Praesepe (M 44)
Libralato et al. 2016 Reference Overview
Transiting exoplanet candidates from K2 Campaigns 5 and 6
Pope 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
All WISE Data Release
Cutri et al. 2014 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
Kepler | K2

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K2-146 Overview

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