HD 154857 Overview

HD 154857 2.30 R_⦿ 5589.00 K

HD 154857 b

HD 154857 c

Overview Parameters Ancillary 3 Nearby Data Bibliography 17 Legend Expand All

HD 154857 Architecture & Discovery Information

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
HD 154857
HD 154857 b	408.6 d	> 778.68 M_⨁	Radial Velocity	2004	McCarthy et al. 2004	Confirmed Planet
HD 154857 c	3452 d	> 819.97 M_⨁	Radial Velocity	2014	Wittenmyer et al. 2014	Confirmed Planet

HD 154857 Stellar Parameters (10 Solutions)

RA: 17h11m15.89s

Dec: -56d40m51.74s

Distance: 63.4482+0.1565-0.1558
pc

Parallax: 15.7321000±0.0385045 mas

Ecliptic Latitude: -33.57957 deg

Ecliptic Longitude: 261.99744 deg

Galactic Latitude: -10.02581 deg

Galactic Longitude: 333.28825 deg

Total Proper Motion: 103.8983825±0.0523370 mas/yr

Proper Motion (RA): 87.5849000±0.0538587 mas/yr

Proper Motion (Dec): -55.8906000±0.0483975 mas/yr

Photometry: m_V
7.24±0.03; m_TESS
6.5859±0.0060; m_J
5.938±0.018; m_H
5.588±0.038; m_Ks
5.509±0.018; m_W1
5.503±0.172; m_W2
5.385±0.059; m_W3
5.505±0.015; m_W4
5.452±0.041; m_Gaia
7.048370±0.000218; m_B
7.905±0.000

Abundances (Hypatia Catalog): [Fe/H] -0.22±0.04 dex; [Na/H] -0.20±0.04 dex; [Si/H] -0.17±0.05 dex

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

Source	TICv8	Gaia DR2	Stassun et al. 2017	Wittenmyer et al. 2014	Takeda et al. 2007	Valenti & Fischer 2005	Nordstrom et al. 2004	Henry et al. 1996	Michigan Catalog, Vol. 1	Cannon & Pickering 1918
S Index	---	---	---	---	---	---	---	0.142	---	---
CAII LOG RHK	---	---	---	---	---	---	---	-5.14	---	---
T_eff (K)	5604.560+150.292-132.276	5582.5+38.5-115.4	5589±18	5605	---	---	---	---	---	---
Metallicity (dex)	-0.2236±0.0240 [M/H]	---	-0.22 [Fe/H]	-0.20 [Fe/H]	---	---	---	---	---	---
M_✶ (M_⦿)	0.9900000+0.1346350-0.1265380	---	1.96±0.12	1.718 +0.03-0.022	1.718+0.030-0.022	---	---	---	---	---
R_✶ (R_⦿)	2.274650+0.138611-0.121852	2.2993386+0.0980937-0.0313900	2.30±0.06	1.760±0.057	2.31+0.17-0.10	---	---	---	---	---
log g (log₁₀(cm/s²))	3.7198700+0.0721237-0.0961697	---	4.01±0.01	3.82	3.95+0.05-0.03	---	---	---	---	---
L_✶ (log₁₀(L_⦿))	0.66269061+0.00715663-0.01466332	0.66521551+0.00157138-0.00157705	---	---	---	---	---	---	---	---
γ (km/s)	---	28.058446433094662±0.152455991514070	---	---	---	27.9	27.9±0.2	---	---	---
v sin i (km/s)	---	---	---	1.4±0.5	---	1.4±0.5	2	---	---	---
Sp. T	---	---	---	G5 V	---	---	---	---	G5 V	G0
Age (Gyr)	---	---	---	---	5.64+0.80-0.92	---	---	---	---	---
ρ_✶ (g/cm³)	0.1185922+0.0369239-0.0199630	---	---	---	---	---	---	---	---	---

HD 154857 b Planetary Parameters (3 Solutions)

Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Stassun et al. 2017	Wittenmyer et al. 2014	McCarthy et al. 2004
M_p sin i (M_⨁)	779±35	711.91±15.89	570±100
M_p sin i (M_Jup)	2.45±0.11	2.24±0.05	1.8±0.4
e	0.46±0.02	0.46±0.02	0.47±0.02
P (days)	408.60001±0.50000	408.6±0.5	409.0±1
K (m/s)	48.3±1.0	48.3±1.0	---
a (au)	1.29±0.02	1.291±0.008	1.2±0.2
T_p (days)	---	2453572.5±2.4	2450346±5
ω (deg)	---	57±4	59±4

HD 154857 c Planetary Parameters (1 Solution)

Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Wittenmyer et al. 2014
T_p (days)	2455219±375
ω (deg)	352±37
M_p sin i (M_⨁)	819.97±50.85
M_p sin i (M_Jup)	2.58±0.16
e	0.06±0.05
P (days)	3452±105
K (m/s)	24.2±1.1
a (au)	5.36±0.09

Ancillary Information (3 Unique Files)

+ HD 154857 (2 File Types, 3 Files)

Literature Time Series (2 File Types, 3 Files)

File Type	Data Points	Filter	Reference
Photometric Light Curve	134	Hp (Hipparcos)	Hipparcos and Tycho Catalogs
Radial Velocity Curve	28	Optical Spectra	O'Toole et al. 2007
Radial Velocity Curve	18	Optical Spectra	McCarthy et al. 2004

Nearby Data (within 30 arcseconds) Browse Nearby Data

Known Objects: 2 Confirmed Planets; 7 2MASS Point Source Catalog

Data Files: 4 KELT Time Series; 2 Associated Literature Data

Bibliography (17 References)

The Revised TESS Input Catalog and Candidate Target List
TICv8 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
The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs
Wittenmyer et al. 2014 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
New Planets around Three G Dwarfs
O'Toole et al. 2007 Reference Overview
Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
Takeda et al. 2007 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
Multiple Companions to HD 154857 and HD 160691
McCarthy et al. 2004 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
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview
The Hipparcos and Tycho Photometric System Passbands
Tycho 2 converted using Bessell 2000 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
Michigan Catalog of two-dimensional spectral types for the HD stars, Vol 1
Michigan Catalog, Vol. 1 Reference Overview
The Henry Draper catalogue 0h, 1h, 2h, and 3h
Cannon & Pickering 1918 Reference Overview

Legend

System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

Aliases
Data Access
Transit Prediction Service
Time Series
Kepler | K2

External Link
Search
Browse
Download