HD 181342

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
HD 181342
HD 181342 b	564.1 d	> 807.29 M_⨁	Radial Velocity	2009	Johnson et al. 2010	Confirmed Planet

HD 181342 Stellar Parameters (11 Solutions)

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RA: 19h21m04.18s

Dec: -23d37m10.92s

Distance: 120.391±0.694 pc

Parallax: 8.2777800±0.0475449 mas

Ecliptic Latitude: -1.47344 deg

Ecliptic Longitude: 288.50716 deg

Galactic Latitude: -16.7282 deg

Galactic Longitude: 14.50487 deg

Total Proper Motion: 55.5049316±0.0842696 mas/yr

Proper Motion (RA): -46.5970000±0.0882746 mas/yr

Proper Motion (Dec): -30.1582000±0.0738352 mas/yr

Photometry: m_V
7.55±0.03; m_TESS
6.69734±0.00620; m_J
5.853±0.018; m_H
5.370±0.026; m_Ks
5.251±0.020; m_Kep
7.375; m_W1
5.244±0.172; m_W2
5.100±0.067; m_W3
5.255±0.016; m_W4
5.153±0.031; m_Gaia
7.284050±0.000249; m_B
8.566±0.023

Abundances (Hypatia Catalog): [Fe/H] 0.27±0.10 dex; [C/H] 0.14±0.10 dex; [O/H] 0.07±0.05 dex; [Na/H] 0.34±0.10 dex; [Mg/H] 0.10±0.19 dex; [Al/H] 0.32±0.09 dex; [Si/H] 0.35±0.18 dex; [Ca/H] 0.24±0.04 dex; [Y/H] 0.43±0.08 dex; [BaII/H] 0.05±0.19 dex

Mission: K2 : Observed in Campaign 7

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

Source	Jenkins et al. 2025	TICv8	Luhn et al. 2019	Gaia DR2	Stassun et al. 2017	Jones et al. 2016	Jofré et al. 2015	Mortier et al. 2013	Johnson et al. 2010	Michigan Catalog, Vol. 4	Cannon & Pickering 1918
T_eff (K)	5008±50	4945.0±25.0	4945	4936.5850+32.9150-45.8184	5005±18	5040±100	4976±26	4965±56	5014±44	---	---
Metallicity (dex)	0.13±0.05 [Fe/H]	0.26±0.10 [M/H]	---	---	0.21 [Fe/H]	0.20±0.08 [Fe/H]	0.22±0.05 [Fe/H]	0.15±0.04 [Fe/H]	0.26±0.03 [Fe/H]	---	---
M_✶ (M_⦿)	1.64±0.09	---	1.69	---	2.25±0.31	1.89±0.11	1.78±0.11	1.70±0.09	1.84±0.13	---	---
log g (log₁₀(cm/s²))	3.13±0.10	---	3.28	---	3.38±0.05	3.3±0.2	3.42±0.07	3.27±0.19	3.40±0.06	---	---
R_✶ (R_⦿)	5.31±0.06	5.2988	4.71	5.267829+0.099164-0.069551	5.09±0.20	5.12±0.49	4.55±0.49	---	4.6±0.1	---	---
L_✶ (log₁₀(L_⦿))	1.17±0.01	---	---	1.1716645+0.0034609-0.0034887	---	1.176+0.066-0.078	1.21±0.13	---	1.08+0.02-0.02	---	---
v sin i (km/s)	3.33±0.54	---	---	---	---	1.90±0.90	1.92±0.23	---	---	---	---
Sp. T	K0 III	---	---	---	---	K0 III	---	---	---	K0 III	K0
γ (km/s)	---	---	---	-0.70019727673555998±0.14545785260063598	---	---	---	---	---	---	---
Age (Gyr)	2.00±0.37	---	---	---	---	---	1.56±0.28	---	1.8±0.4	---	---

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HD 181342 b Planetary Parameters (5 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Luhn et al. 2019	Jenkins et al. 2025	Stassun et al. 2017	Jones et al. 2016	Johnson et al. 2010
ω (deg)	290±110	0	---	311.8±35.8	281.0±30.0
M_p sin i (M_⨁)	807±60	763+48-51	1205±140	922±64	1048.79±63.5633
M_p sin i (M_Jup)	2.54±0.19	2.40+0.15-0.16	3.79±0.44	2.9±0.2	3.3±0.2
e	0.022±0.051	0	0.18±0.06	0.10±0.07	0.177±0.057
P (days)	564.1±4.1	563.60+5.71-3.72	663.00000±29.00000	562.1±6.0	663.0±29.0
K (m/s)	44.1±3.3	42.61+2.08-2.30	52.3±3.7	46.5±1.8	---
T_p (days)	2461090±220 (JD)	---	---	2459915.5±54.3 (JD)	2454881.0±50.0
a (au)	1.592±0.091	---	1.78±0.06	1.65±0.04	1.78±0.07

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Ancillary Information (2 Unique Files)

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+ HD 181342 (2 File Types, 2 Files)

Literature Time Series (2 File Types, 2 Files)

File Type	Data Points	Filter	Reference
Photometric Light Curve	66	Hp (Hipparcos)	Hipparcos and Tycho Catalogs
Radial Velocity Curve	17	Optical Spectra	Johnson et al. 2010

Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 1 Confirmed Planets; 1 K2 Targets; 8 2MASS Point Source Catalog

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

Bibliography (16 References)

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Sub-Jupiter gas giants orbiting giant stars uncovered using a Bayesian framework
Jenkins et al. 2025 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts
Luhn et al. 2019 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes
Stassun et al. 2017 Reference Overview
Four new planets around giant stars and the mass-metallicity correlation of planet-hosting stars
Jones 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
Stellar parameters and chemical abundances of 223 evolved stars with and without planets
Jofré et al. 2015 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
New and updated stellar parameters for 71 evolved planet hosts. On the metallicity-giant planet connection
Mortier et al. 2013 Reference Overview
Retired A Stars and Their Companions IV. Seven Jovian Exoplanets from Keck Observatory
Johnson et al. 2010 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview
The Tycho-2 catalog of the 2.5 million brightest stars
The Tycho-2 Catalog Reference Overview
The Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs Reference Overview
Michigan Catalog of two-dimensional spectral types for the HD stars, Vol 4
Michigan Catalog, Vol. 4 Reference Overview
The Henry Draper catalogue 0h, 1h, 2h, and 3h
Cannon & Pickering 1918 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
Search
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Debug Info

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https://vmexoweb2.ipac.caltech.edu/data/Overviews_2.0/4/HD_181342.json

Catalog Parameters

RA

ra

19h21m04.18s

Dec

dec

-23d37m10.92s

β

elat

-1.47344

λ

elon

288.50716

b

glat

-16.7282

l

glon

14.50487

m_V

sy_vmag

7.55±0.03

m_TESS

sy_tmag

6.69734±0.00620

m_J

sy_jmag

5.853±0.018

m_H

sy_hmag

5.370±0.026

m_Ks

sy_kmag

5.251±0.020

m_Kep

sy_kepmag

7.375

m_W1

sy_w1mag

5.244±0.172

m_W2

sy_w2mag

5.100±0.067

m_W3

sy_w3mag

5.255±0.016

m_W4

sy_w4mag

5.153±0.031

sy_icmag

no_data

m_Gaia

sy_gaiamag

7.284050±0.000249

m_B

sy_bmag

8.566±0.023

sy_gmag

no_data

sy_imag

no_data

sy_rmag

no_data

sy_umag

no_data

sy_zmag

no_data

μ

sy_pm

55.5049316±0.0842696

μ_δ

sy_pmdec

-30.1582000±0.0738352

μ_α

sy_pmra

-46.5970000±0.0882746

π

sy_plx

8.2777800±0.0475449

Distance

sy_dist

120.391±0.694

Set Parameters

R_✶

st_rad

5.09±0.20

T_eff

st_teff

4965±56

HD 181342 Overview

HD 181342 Architecture & Discovery Information

HD 181342