HN Peg Overview

HN Peg 1.04 R_⦿ 5974.00 K

HN Peg b

1.051 R_Jup

Overview Notes 1 Parameters Ancillary 1 Nearby Data Bibliography 20 Legend Expand All

HN Peg Architecture & Discovery Information

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
HN Peg
HN Peg b	773 au	11.78 R_⨁	Imaging	2006	Luhman et al. 2007	Confirmed Planet

Exoplanet Archive Notes (1)

HN Peg

Stellar rotation period value/uncertainties estimated from range given in ref. (Luhman et al. 2007)

HN Peg Stellar Parameters (32 Solutions)

RA: 21h44m31.58s

Dec: +14d46m17.23s

Distance: 18.1186±0.0201 pc

Parallax: 55.1631000±0.0607768 mas

Ecliptic Latitude: 26.63305 deg

Ecliptic Longitude: 333.91578 deg

Galactic Latitude: -28.27039 deg

Galactic Longitude: 69.85975 deg

Total Proper Motion: 257.2932473±0.1023726 mas/yr

Proper Motion (RA): 231.086000±0.103103 mas/yr

Proper Motion (Dec): -113.1330000±0.0992672 mas/yr

Photometry: m_V
5.97707±0.02300; m_TESS
5.4198±0.0067; m_J
4.793±0.035; m_H
4.598±0.036; m_Ks
4.559±0.038; m_W1
4.506±0.221; m_W2
4.294±0.133; m_W3
4.558±0.015; m_W4
4.488±0.029; m_Gaia
5.823630±0.001848; m_B
6.533±0.023

Abundances (Hypatia Catalog): [Fe/H] -0.02±0.12 dex; [C/H] -0.06±0.10 dex; [O/H] 0.02±0.16 dex; [Na/H] -0.14±0.15 dex; [Mg/H] -0.09±0.20 dex; [Al/H] -0.06±0.22 dex; [Si/H] -0.03±0.10 dex; [Ca/H] 0.02±0.10 dex; [Y/H] 0.15±0.18 dex; [BaII/H] 0.09±0.19 dex

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; Stellar Hosts

Source	Swastik et al. 2021	TICv8	Gaia DR2	Turnbull 2015	Luhman et al. 2007	Gray et al. 2006	Valenti & Fischer 2005	Nordstrom et al. 2004	Gray et al. 2003	Reiners & Schmitt 2003a	Pizzolato et al. 2003	Nidever et al. 2002	Henry et al. 1996	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Cannon & Pickering 1918
S Index	---	---	---	---	---	---	---	---	---	---	---	---	0.325	0.3153±0.0119	0.3439±0.0091	0.3217±0.0102	0.3388±0.0194	0.3381±0.0130	0.3352±0.0128	0.3441±0.0069	0.3310±0.0136	0.3179±0.0090	0.3052±0.0108	0.3153±0.0119	0.3439±0.0091	0.3217±0.0102	0.3388±0.0194	0.3381±0.0130	0.3352±0.0128	0.3441±0.0069	0.3310±0.0136	---
CAII LOG RHK	---	---	---	---	---	---	---	---	---	---	---	---	-4.42	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
T_eff (K)	6186+14-7	5927.140+136.221-155.333	5955.0+87.0-89.3	5974	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
L_✶ (log₁₀(L_⦿))	---	0.055197465+0.013053944-0.012546125	0.060240873+0.000820150-0.000821701	0.072 +0.022-0.023	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Metallicity (dex)	0.0+0.0-0.0 [Fe/H]	-0.0360186±0.0132691 [M/H]	---	-0.02 [Fe/H]	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Age (Gyr)	---	---	---	3.1	0.3±0.2	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
M_✶ (M_⦿)	---	1.080000+0.140394-0.140491	---	1.10	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
R_✶ (R_⦿)	---	1.0105600+0.0490683-0.0593136	1.0069538+0.0308932-0.0287899	1.04	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
log g (log₁₀(cm/s²))	4.48+0.03-0.02	4.4623700+0.0839275-0.0896122	---	4.48	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Sp. T	---	---	---	G0V	G0 V	G0 V CH-0.5	---	---	G0 IV-V	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	G0
γ (km/s)	---	---	-17.176225962148909±0.171938015619982	---	---	---	-16.2	-17.2±0.1	---	---	---	-16.8	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
v sin i (km/s)	8.73+0.06-0.05	---	---	---	10	---	10.6±0.5	10	---	10.4±0.4	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
P_rot (days)	---	---	---	---	4.5±0.5	---	---	---	---	---	4.70	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
ρ_✶ (g/cm³)	---	1.4753832+0.3342078-0.3777066	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---

HN Peg b Planetary Parameters (1 Solution)

Status: Confirmed Planet

Detected By: Imaging

Tools: Planetary Systems; Direct Imaging

Source	Luhman et al. 2007
M_p (M_⨁)	6991.57±2996.39
M_p (M_Jup)	21.9987±9.42803
R_p (R_⨁)	11.7768 +1.52663-0.654270
R_p (R_Jup)	1.05066 +0.136197-0.0583702
a (au)	773±+13

Ancillary Information (1 Unique File)

+ HN Peg (1 File Type, 1 File)

Literature Time Series (1 File Type, 1 File)

File Type	Data Points	Filter	Reference
Photometric Light Curve	61	Hp (Hipparcos)	Hipparcos and Tycho Catalogs

Nearby Data (within 30 arcseconds) Browse Nearby Data

+

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

Data Files: 1 Associated Literature Data

Bibliography (20 References)

Host Star Metallicity of Directly Imaged Wide-orbit Planets: Implications for Planet Formation
Swastik et al. 2021 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
ExoCat-1: The Nearby Stellar Systems Catalog for Exoplanet Imaging Missions
Turnbull 2015 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
Discovery of Two T Dwarf Companions with the Spitzer Space Telescope
Luhman et al. 2007 Reference Overview
Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
Gray et al. 2006 Reference Overview
Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs
Valenti & Fischer 2005 Reference Overview
The Geneva-Copenhagen survey of the Solar neighbourhood. Ages,metallicities and kinematix properties of ~14 000 F and G dwarfs
Nordstrom et al. 2004 Reference Overview
Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I
Gray et al. 2003 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview
Rotation and differential rotation in field F- and G-type stars
Reiners & Schmitt 2003a Reference Overview
The stellar activity-rotation relationship revisited: Dependence of saturated and non-saturated X-ray emission regimes on stellar mass for late-type dwarfs.
Pizzolato et al. 2003 Reference Overview
Radial Velocities of 889 late-type stars
Nidever et al. 2002 Reference Overview
Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
van Altena et al. 2001 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
A Survey of Ca II H and K Chromospheric Emission in Southern Solar-Type Stars
Henry et al. 1996 Reference Overview
CA II H and K measurements made at Mount Wilson Observatory, 1966-1983
Duncan et al. 1991 Reference Overview
The Henry Draper catalogue 0h, 1h, 2h, and 3h
Cannon & Pickering 1918 Reference Overview

System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

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Time Series
Kepler | K2

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