J/AJ/159/243 Light curve of HD 118203 b from TESS (Pepper+, 2020)
TESS Reveals HD 118203 b to be a Transiting Planet.
Pepper J., Kane S.R., Rodriguez J.E., Hinkel N.R., Eastman J.D.,
Daylan T., Mocnik T., Dalba P.A., Gaudi B.S., Fetherolf T., Stassun K.G.,
Campante T.L., Vanderburg A., Huber D., Bossini D., Crossfield I.,
Howell S.B., Stephens A.W., Furlan E., Ricker G.R., Vanderspek R.,
Latham D.W., Seager S., Winn J.N., Jenkins J.M., Twicken J.D., Rose M.,
Smith J.C., Glidden A., Levine A.M., Rinehart S., Collins K.A., Mann A.W.,
Burt J.A., James D.J., Siverd R.J., Gunther M.N.
<Astron. J., 159, 243 (2020)>
=2020AJ....159..243P 2020AJ....159..243P
ADC_Keywords: Exoplanets; Photometry; Optical
Keywords: Exoplanet astronomy ; Exoplanet systems ; Transit photometry
Abstract:
The exoplanet HD 118203 b, orbiting a bright (V=8.05) host star, was
discovered using the radial velocity method by da Silva et al., but
was not previously known to transit. Transiting Exoplanet Survey
Satellite (TESS) photometry has revealed that this planet transits its
host star. Nine planetary transits were observed by TESS, allowing us
to measure the radius of the planet to be 1.136-0.028+0.029 RJ,
and to calculate the planet mass to be 2.166-0.079+0.074 MJ. The
host star is slightly evolved with an effective temperature of
Teff=5683-85+84K and a surface gravity of
log(g)=3.8890.0180.017. With an orbital period of
6.134985-0.000030+0.000029 days and an eccentricity of
0.314±0.017, the planet occupies a transitional regime between
circularized hot Jupiters and more dynamically active planets at
longer orbital periods. The host star is among the 10 brightest known
to have transiting giant planets, providing opportunities for both
planetary atmospheric and asteroseismic studies.
Description:
The star HD 118203 was observed by the Transiting Exoplanet Survey
Satellite (TESS) with a red-optical filter (600-1000nm) in Sectors 15
and 16 of the mission. TESS obtained 17,839 observations of HD 118203
in 2 minute cadence from 2019 August 15 to September 11, and 16,645
observations from September 11 to October 7.
Objects:
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RA (2000) DE Designation(s)
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13 34 02.53 +53 43 42.6 HD 118203 b = TOI-1271b
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 29 34484 The flattened TESS PDCSAP 2-minute cadence light
curve
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See also:
III/135 : Henry Draper Cat. & Extension (Cannon+ 1918-1924; ADC 1989)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/328 : AllWISE Data Release (Cutri+ 2013)
II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
J/AJ/106/773 : Mass-luminosity relation (Henry+, 1993)
J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000 A (Pickles 1998)
J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)
J/ApJ/640/1051 : 25pc sample of Sun-like stars (Grether+, 2006)
J/MNRAS/403/1368 : Li abund. & vsini for star-planet systems (Gonzalez+, 2010)
J/A+A/533/A114 : Transit of super-Earth 55 Cnc e (Demory+, 2011)
J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)
J/A+A/546/A27 : Radial velocity and photometry for GJ3470 (Bonfils+, 2012)
J/ApJ/754/37 : HD 192263 radial velocities and photometry (Dragomir+, 2012)
J/ApJ/772/L2 : Keck/HIRES radial velocities for HD 97658 (Dragomir+, 2013)
J/A+A/554/A84 : Abundances of evolved stars (Maldonado+, 2013)
J/AJ/148/54 : The Hypatia Catalog ((Hinkel+, 2014)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/MNRAS/445/2758 : KIC giants Bayesian dist. & extinctions (Rodrigues+ 2014)
J/A+A/576/A69 : Li abundances in F stars (Delgado Mena+, 2015)
J/A+A/584/A72 : A transiting rocky planet at 6.5pc from Sun (Motalebi+ 2015)
J/A+A/576/A94 : Northern bright planet host stars parameters (Sousa+, 2015)
J/A+A/588/A98 : Metallicities & abund. of evolved stars (Maldonado+, 2016)
J/ApJS/222/14 : Planetary candidat. from 1st yr K2 mission (Vanderburg+, 2016)
J/MNRAS/472/1618 : Kepler study of starspot lifetimes (Giles+, 2017)
J/AJ/153/21 : Abund. in the local region. II. F, G, & K dwarfs (Luck+, 2017)
J/A+A/625/A16 : HD 2685 TESS photometry (Jones+, 2019)
J/AJ/157/191 : Light curve & radial velocities for TOI-172 (Rodriguez+, 2019)
J/ApJS/241/12 : Asteroseismic Target List (ATL) for TESS (Schofield+, 2019)
J/AJ/159/60 : 8695 flares from 1228 stars in TESS sect. 1 & 2 (Gunther+, 2020)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.4 d BJD [1711/1764] Barycentric Julian Date,
BJD-2457000
11- 20 F10.8 --- Flux [0.99/1.01] Relative Flux
22- 29 F8.6 --- e_Flux [3.51e-4] Uncertainty in Flux
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History:
From electronic version of the journal
(End) Prepared by [AAS], Robin Leichtnam [CDS] 18-Sep-2025