K2-73

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
K2-73
K2-73 b	7.5 d	2.58 R_⨁	Transit	2016	Crossfield et al. 2016	Confirmed Planet
K2-73 c	1000 d	> 1142 M_⨁	Radial Velocity	2025	Howard et al. 2025	Confirmed Planet

Exoplanet Archive Notes (1)

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K2-73 b

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

K2-73 Stellar Parameters (9 Solutions)

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RA: 22h20m06.16s

Dec: -09d03m21.92s

Distance: 269.183+2.539-2.493
pc

Parallax: 3.6864300±0.0344589 mas

Ecliptic Latitude: 1.22851 deg

Ecliptic Longitude: 333.55638 deg

Galactic Latitude: -49.98864 deg

Galactic Longitude: 52.5209 deg

Total Proper Motion: 50.2007714±0.0615324 mas/yr

Proper Motion (RA): 49.2720000±0.0615905 mas/yr

Proper Motion (Dec): 9.6118400±0.0599855 mas/yr

Photometry: m_V
11.345±0.034; m_TESS
11.2821±0.0061; m_J
10.695±0.026; m_H
10.382±0.022; m_Ks
10.322±0.021; m_Kep
11.745; m_W1
10.293±0.023; m_W2
10.335±0.020; m_W3
10.223±0.070; m_W4
8.891; m_Gaia
11.714600±0.000289; m_B
12.433±0.356; m_g
12.4143000±0.0014095; m_i
13.2337000±0.0047745; m_r
11.8450000±0.0011792; m_u
14.3929000±0.0045608; m_z
12.5888000±0.0045115

Abundances (Hypatia Catalog): [Fe/H] 0.08±0.06 dex; [C/H] 0.03±0.09 dex; [O/H] -0.07±0.09 dex; [Na/H] -0.10±0.04 dex; [Mg/H] 0.09±0.07 dex; [Al/H] -0.09±0.06 dex; [Si/H] -0.03±0.05 dex; [Ca/H] 0.05±0.06 dex; [Y/H] 0.09±0.08 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	Howard et al. 2025	TICv8	Gaia DR2	Mayo et al. 2018	Crossfield et al. 2016	Kruse et al. 2019	Barros et al. 2016	Schmitt et al. 2016	Vanderburg et al. 2016
T_eff (K)	5867.0±100.0	5865.0000+128.1910-95.1484	5732.6665+70.0835-151.5170	5844.0±50.0	5922±76	---	---	---	6634
M_✶ (M_⦿)	1.02±0.04	1.061000+0.140148-0.112087	---	1.043192 +0.025665-0.027360	1.050±0.030	---	---	---	---
R_✶ (R_⦿)	1.058±0.039	1.0572100+0.0533608-0.0415136	1.0788460+0.0593720-0.0259024	1.051008 +0.131147-0.070573	1.060±0.070	1.079 +0.026-0.059	---	---	1.77
log g (log₁₀(cm/s²))	4.390±0.081	4.4154600+0.0897971-0.0555310	---	4.35±0.1	4.409±0.057	---	---	---	---
Metallicity (dex)	0.040±0.044 [Fe/H]	0.030±0.100 [M/H]	---	0.09±0.08 [Fe/H]	---	---	---	---	---
L_✶ (log₁₀(L_⦿))	---	0.076089308+0.015768170-0.019348606	0.054040320+0.006171783-0.006260757	---	---	---	---	---	---
γ (km/s)	---	---	-38.40547541026231±0.93157576652786	---	---	---	---	---	---
ρ_✶ (g/cm³)	---	1.2658929+0.3389744-0.1732521	---	---	---	---	---	---	---
v sin i (km/s)	2.0±1.0	---	---	---	---	---	---	---	---
S Index	0.1586	---	---	---	---	---	---	---	---
CAII LOG RHK	-4.999	---	---	---	---	---	---	---	---

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K2-73 b Planetary Parameters (7 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity, Transit

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

Source	Howard et al. 2025	Mayo et al. 2018	Crossfield et al. 2016	Kruse et al. 2019	Barros et al. 2016	Schmitt et al. 2016	Vanderburg et al. 2016
a/R_✶	---	15.108184 +1.394212-3.187118	---	14.9 +3.3-1.4	---	11.8 +3.6-3.7	---
i (deg)	---	88.443035 +1.107666-1.798170	---	---	---	86.7 +2.4-2.9	---
P (days)	7.49556±0.00029	7.495692 +0.000279-0.000283	7.49543±0.00059	7.49569±0.00025	7.49491004	7.495 +0.0084-0.0069	7.4956613
R_p (R_⨁)	2.58+0.13-0.06	2.6253911509 +0.362051901362-0.190863836641	2.45±0.21	2.71 +0.11-0.29	---	---	4.74
R_p (R_Jup)	0.230+0.012-0.005	0.2342217103 +0.0323001072-0.0170277310	0.219±0.019	0.242 +0.0098-0.026	---	---	0.423
R_p/R_✶	---	0.022901 +0.001345-0.000638	0.0210±0.0012	0.02300 +0.00080-0.00212	---	0.0239 +0.0035-0.0021	0.02273
T_C (days)	2456987.6726±0.0012 (BJD)	2456980.17657 +0.001433-0.001327	2456987.6741±0.0023 (BJD-TDB)	2456980.1755±0.0012 (BJD)	2456987.675542 (BJD)	2456987.6728 +0.0013-0.0018 (BJD)	2456980.177 (BJD)
b	---	---	---	---	---	0.28 +0.57-1.01	0.20
δ (%)	---	---	---	0.0589 +0.0012-0.0013	0.058±0.001	---	0.0603
T₁₄ (hours)	---	---	3.620±0.085	3.59040+0.06720-0.08880	3.83000+0.13500-0.13500	3.52800+0.07200-0.12000	3.51000
S (S_⨁)	209.0+23.0-21.0	---	213±30	---	---	---	---
a (au)	---	---	0.07619±0.00072	---	---	---	---
T_eq (K)	968.0±25.0	---	---	---	---	---	---
M_p (M_⨁)	9.20+3.80-3.70	---	---	---	---	---	---
M_p (M_Jup)	0.0289+0.0120-0.0116	---	---	---	---	---	---
ρ (g/cm³)	2.8+1.3-1.2	---	---	---	---	---	---

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K2-73 c Planetary Parameters (1 Solution)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems; K2 Names

Source	Howard et al. 2025
T_eq (K)	186.1+6.6-7.2
S (S_⨁)	0.285±0.042
M_p sin i (M_⨁)	1142.0+53.0-45.0
M_p sin i (M_Jup)	3.5931+0.1668-0.1416
P (days)	1000.00±100.00
T_C (days)	2456905.0+62.0-99.0 (BJD)

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Nearby Data (within 30 arcseconds) Browse Nearby Data

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

Data Files: 1 K2 Time Series; 2 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
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
New planetary and eclipsing binary candidates from campaigns 1-6 of the K2 mission
Barros et al. 2016 Reference Overview
197 Candidates and 104 Validated Planets in K2’s First Five Fields
Crossfield et al. 2016 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

Legend

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System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

Aliases
Data Access
Transit Prediction Service
Time Series
Kepler | K2

External Link
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Download

Debug Info

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https://vmexoweb2.ipac.caltech.edu/data/Overviews_2.0/9/K2-73.json

Catalog Parameters

RA

ra

22h20m06.16s

Dec

dec

-09d03m21.92s

β

elat

1.22851

λ

elon

333.55638

b

glat

-49.98864

l

glon

52.5209

m_V

sy_vmag

11.345±0.034

m_TESS

sy_tmag

11.2821±0.0061

m_J

sy_jmag

10.695±0.026

m_H

sy_hmag

10.382±0.022

m_Ks

sy_kmag

10.322±0.021

m_Kep

sy_kepmag

11.745

m_W1

sy_w1mag

10.293±0.023

m_W2

sy_w2mag

10.335±0.020

m_W3

sy_w3mag

10.223±0.070

m_W4

sy_w4mag

8.891

sy_icmag

no_data

m_Gaia

sy_gaiamag

11.714600±0.000289

m_B

sy_bmag

12.433±0.356

m_g

sy_gmag

12.4143000±0.0014095

m_i

sy_imag

13.2337000±0.0047745

m_r

sy_rmag

11.8450000±0.0011792

m_u

sy_umag

14.3929000±0.0045608

m_z

sy_zmag

12.5888000±0.0045115

μ

sy_pm

50.2007714±0.0615324

μ_δ

sy_pmdec

9.6118400±0.0599855

μ_α

sy_pmra

49.2720000±0.0615905

π

sy_plx

3.6864300±0.0344589

Distance

sy_dist

269.183+2.539-2.493

Set Parameters

R_✶

st_rad

1.060±0.070

T_eff

st_teff

5922±76

K2-73 Overview

K2-73 Architecture & Discovery Information

K2-73