K2-216 | NASA Exoplanet Archive

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
K2-216
K2-216 b	2.17 d	1.75 R_⨁	Transit	2018	Mayo et al. 2018	Confirmed Planet

K2-216 Stellar Parameters (9 Solutions)

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RA: 00h45m55.26s

Dec: +06d20m49.31s

Distance: 115.461+0.710-0.701
pc

Parallax: 8.6324600±0.0525101 mas

Ecliptic Latitude: 1.30322 deg

Ecliptic Longitude: 13.02957 deg

Galactic Latitude: -56.49811 deg

Galactic Longitude: 120.44792 deg

Total Proper Motion: 10.7859024±0.0625931 mas/yr

Proper Motion (RA): -1.9698400±0.0971848 mas/yr

Proper Motion (Dec): 10.6045000±0.0610507 mas/yr

Photometry: m_V
12.403±0.103; m_TESS
11.375±0.006; m_J
10.394±0.023; m_H
9.856±0.032; m_Ks
9.721±0.018; m_Kep
12.100; m_W1
9.650±0.021; m_W2
9.744±0.019; m_W3
9.731±0.083; m_W4
7.809; m_Gaia
12.057600±0.000207; m_B
13.563±0.024

Mission: K2 : Observed in Campaign 8

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

Source	Howard et al. 2025	TICv8	Livingston et al. 2018	Persson et al. 2018	Gaia DR2	Mayo et al. 2018	Kruse et al. 2019	Petigura et al. 2018	ExoFOP
T_eff (K)	4495.0±70.0	4542.000+120.047-124.767	4658±56	4503±69	4703.2676+81.8027-116.1980	4591.0±50.0	---	---	4542.0±122.4
L_✶ (log₁₀(L_⦿))	---	-0.7088230+0.0276476-0.0141427	---	-0.72+0.02-0.02	-0.74646033+0.00357182-0.00360144	---	---	---	---
γ (km/s)	---	---	---	---	-26.162508106384397±0.465658347308593	---	---	---	---
R_✶ (R_⦿)	0.699±0.023	0.7140800+0.0577683-0.0522266	0.69±0.01	0.72±0.03	0.63770986+0.03271760-0.02161750	0.665648 +0.021695-0.019044	0.638 +0.022-0.033	0.71	0.71±0.05
Metallicity (dex)	0.080±0.120 [Fe/H]	---	-0.060±0.050 [Fe/H]	0.0±0.1 [Fe/H]	---	-0.18±0.08 [Fe/H]	---	---	---
ρ_✶ (g/cm³)	---	2.7684195+0.9813787-0.6014206	2.590+1.160-0.891	2.3+0.8-1.4	---	---	---	---	---
M_✶ (M_⦿)	0.72±0.03	0.7150000+0.0965902-0.0711479	0.74±0.02	0.70±0.03	---	0.699496 +0.022526-0.022713	---	---	---
log g (log₁₀(cm/s²))	4.6±0.2	4.5848800+0.1228750-0.0702706	4.63±0.01	4.57±0.09	---	4.59±0.1	---	---	4.58±0.10
v sin i (km/s)	---	---	---	1.8±1.0	---	---	---	---	---
Sp. T	---	---	---	K5 V	---	---	---	---	---
S Index	0.612	---	---	---	---	---	---	---	---
CAII LOG RHK	-4.627	---	---	---	---	---	---	---	---

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K2-216 b Planetary Parameters (7 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity, Transit

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

Source	Persson et al. 2018	Howard et al. 2025	Livingston et al. 2018	Mayo et al. 2018	Kruse et al. 2019	Petigura et al. 2018	ExoFOP
a/R_✶	8.30+0.90-2.30	---	8.650+0.690-1.870	8.677734 +0.891125-2.119382	8.1 +2.3-1.0	---	---
T_eq (K)	1103+180-56	967.0+24.0-23.0	992.0±14.0	---	---	---	1013
b	0.45±0.31	---	0.39+0.31-0.28	---	---	0.49 +0.31-0.33	---
P (days)	2.17480±0.00005	2.174789±0.000056	2.174782+0.000072-0.000074	2.174789 +0.000039-0.000038	2.174829 +0.000047-0.000049	2.174769 +0.000075-0.000077	2.1747824±0.0000063
R_p (R_⨁)	1.75+0.17-0.10	1.66+0.13-0.05	1.63±0.09	1.67844825403 +0.1008224259-0.0760271317416	1.63 +0.11-0.24	1.7±0.3	1.791050±0.142077
R_p (R_Jup)	0.156+0.015-0.009	0.148+0.012-0.004	0.145±0.008	0.1497411236 +0.0089947744-0.0067826864	0.145 +0.0098-0.021	0.15±0.03	0.1597871±0.0126753
R_p/R_✶	0.0221+0.0022-0.0007	---	0.0216+0.0017-0.0007	0.023117 +0.001166-0.000812	0.0235 +0.0013-0.0032	0.0222 +0.0029-0.0012	---
a (au)	0.028+0.003-0.007	---	0.0298+0.0002-0.0003	---	---	---	---
T_C (days)	2457394.0417±0.0009 (BJD)	2457394.0417±0.0011 (BJD)	2457394.04235+0.00157-0.00153 (BJD)	2457394.04171 +0.000745-0.000809	2457394.04121 +0.00081-0.00078 (BJD)	2457394.04281 +0.001668-0.001600 (BJD)	2459494.8812470±0.0060093 (BJD)
δ (%)	---	---	---	---	0.062 +0.0014-0.0015	---	0.0560000000±0.0000187547
T₁₄ (hours)	1.84+0.05-0.04	---	---	---	1.85520+0.05280-0.08400	1.82880+0.05040-0.05040	1.654±0.090
S (S_⨁)	248+220-48	207.0+21.0-19.0	---	---	---	---	174.942
M_p (M_⨁)	8.0±1.6	6.1±1.5	---	---	---	---	---
M_p (M_Jup)	0.025±0.005	0.019±0.005	---	---	---	---	---
ρ (g/cm³)	8.20+2.80-2.20	7.0±2.0	---	---	---	---	---
i (deg)	86.9+2.2-4.0	---	---	87.006586 +2.090327-3.538187	---	---	---
e	0	---	---	---	---	---	---
K (m/s)	5.0±1.0	---	---	---	---	---	---

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Nearby Data (within 30 arcseconds) Browse Nearby Data

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

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

Bibliography (12 References)

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Planet Masses, Radii, and Orbits from NASA's K2 Mission
Howard et al. 2025 Reference Overview
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
Sixty Validated Planets from K2 Campaigns 5-8
Livingston et al. 2018 Reference Overview
Super-Earth of 8 M_⊕ in a 2.2-day orbit around the K5V star K2-216
Persson et al. 2018 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 Candidates from K2 Campaigns 5─8 and Follow-up Optical Spectroscopy
Petigura et al. 2018 Reference Overview
ExoFOP TOI Table
ExoFOP
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

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System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

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Time Series
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K2-216 Overview

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