Name | GJ 3470 b | ||
Planet Status | Confirmed | ||
Discovered in | 2012 | ||
Mass | 0.03958 ( -0.00403 +0.00412 ) MJ | ![]() |
|
Mass*sin(i) | — | ![]() |
+ |
Semi-Major Axis | 0.03557 (± 0.001) AU | ![]() |
+ |
Orbital Period | 3.336649 ( -8.1e-05 +8.4e-05 ) day | ![]() |
+ |
Eccentricity | 0.114 (± 0.052) | ![]() |
+ |
ω | 278.0 ( -2.3 +5.7 ) deg | ![]() |
|
Tperi | — | ![]() |
|
Radius | 0.3738074294 ( -0.0526363683404 +0.0526363683404 ) RJ | ![]() |
+ |
Inclination | 88.3 (± 0.5) deg | ![]() |
|
Update | 2023-05-05 | ||
Detection Method | Primary Transit | ||
Mass Detection Method | — | ||
Radius Detection Method | Primary Transit | ||
Primary transit | 2455953.663 (± 0.0035) JD | ![]() |
+ |
Secondary transit | — | ||
λ | 98.0 (± 15.0) deg | ![]() |
|
Impact Parameter b | — | ||
Time Vr=0 | — | ||
Velocity Semiamplitude K | 8.21 (± 0.47) m/s | ![]() |
|
Calculated temperature | — | ||
Measured temperature | — | ||
Hottest point longitude | — | ||
Geometric albedo | — | ||
Surface gravity log(g/gH) | — | ||
Alternate Names | — |
Name | GJ 3470 | ||
Distance | 30.7 ( -1.7 +2.1 ) pc | ![]() |
+ |
Spectral type | M1.5 | ||
Apparent magnitude V | 12.3 | ||
Mass | 0.51 (± 0.06) MSun | ![]() |
+ |
Age | 1.6 (± 1.3) Gyr | ![]() |
+ |
Effective temperature | 3652.0 (± 50.0) K | ![]() |
+ |
Radius | 0.48 (± 0.04) RSun | ![]() |
+ |
Metallicity [Fe/H] | 0.2 (± 0.1) | ![]() |
+ |
Detected Disc | — | ||
Magnetic Field | — | ||
RA2000 | 07:59:06.0 | ||
Dec2000 | +15:23:30 | ||
Alternate Names | |||
Planetary system | 1 planet |
Data Source | Type | Result Value | Result Figure | Notes | Reference |
Molecule | Data Source | Type | Result Value | Result Figure | Notes | Reference |
H | Measurements | Detected | 2018 - BOURRIER V. | |||
Modeling | 2020 - SHAIKHISLAMOV I. | |||||
H2O | Measurements | Detected 5σ | 2019 - BENNEKE B. | |||
He | Measurements | Detected | 2021 - LAMPON M. | |||
Measurements | Detected | 2020 - PALLE E. | ||||
Modeling | 2020 - SHAIKHISLAMOV I. | |||||
GJ3470-d and GJ3470-e: Discovery of Co-Orbiting Exoplanets in a Horseshoe Exchange Orbit
2023
SCOTT Ph., TAYLOR J., BEATTY L., EDLIN J., KEUBLER Ph. et al.
arxiv
No Evidence for Additional Planets at GJ 3470 from TESS and Archival Radial Velocities
2023
TARRANTS Th. & LI A.
Astron. J., submitted
arxiv
The Warm Neptune GJ 3470b has a Polar Orbit
2022
STEFANSSON G., MAHADEVAN S., PETROVICH C., WINN J., KANODIA M. et al.
ApJ. Letters, 931, L15
paper arxiv
Modelling the He I triplet absorption at 10830 Angstroms in the atmospheres of HD 189733 b and GJ 3470 b
2021
LAMPON M., LOPEZ-PUERTAS M., SANZ-PORCADA J., SANCHEZ-LOPEZ A., MOLAVERDIKHANI K. et al.
Astron. & Astrophys., 647, A129
paper arxiv
Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
2021
LAMPON M., LOPEZ-PUERTAS M., CZESLA S., SANCHEZ-LOPEZ A., LARA L. et al.
Astron. & Astrophys., 648, L7
paper arxiv
Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
2021
LAMPON M., LOPEZ-PUERTAS M., CZESLA S., SANCHEZ-LOPEZ A., LARA L. et al.
Astron. & Astrophys., in press
paper
The Hubble PanCET program: Long-term chromospheric evolution and flaring activity of the M dwarf host GJ 3470
2021
BOURRIER V., dos SANTOS L., SANZ-FOURCADA J. et al.
Astron. & Astrophys., in press
paper
Colour-magnitude diagrams of transiting Exoplanets -- III. A public code, nine strange planets, and the role of Phosphine
2020
DRANSFIELD G. & TRIAUD A.
MNRAS, in press
paper arxiv
GJ 3470 c: A Saturn-like Exoplanet Candidate in the Habitable Zone of GJ 3470
2020
SCOTT Ph., WALTER B., YE ., MITCHELL D. HEILAND L., GAO X. et al.
arxiv
A He I upper atmosphere around the warm Neptune GJ 3470b
2020
PALLE E., NORTMANN L., CASASAYAS-BARRIS N., LAMPON M., LOPEZ-PUERTS M. et al.
Astron. & Astrophys., 638, A61
paper arxiv
Why do warm Neptunes present nonzero eccentricity?
2020
CORREIA A., BOURRIER V. & DELISLE J.-B.
Astron. & Astrophys., 635, A37
paper arxiv
Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets
2020
AIRAPETIAN V., BARNES R., COHEN O., COLLINSON G., DANCHI W. et al.
Int. J. Astrobiol., 19, 136
paper
Beyond Equilibrium Temperature: How the Atmosphere/Interior Connection Affects the Onset of Methane, Ammonia, and Clouds in Warm Transiting Giant Planets
2020
FORTNEY J., VISSCHER Ch., MARLEY M., HOOD C., LINE M. et al.
Astron. J., 160, 288
paper arxiv
On the Temperature Profiles and Emission Spectra of Mini-Neptune Atmospheres
2020
PIETTE A. & MADHUSUDHAN N.
ApJ, accepted
arxiv
Global 3D hydrodynamic modeling of absorption in Lyα and He 10830 A lines at transits of GJ3470b
2020
SHAIKHISLAMOV I., KHODACHENKO M., LAMMER H., BEREZUTSKY A., MIROSHNICHENKOI. et al.
MNRAS, in press
paper
Evidence for He I 10830 Å~ absorption during the transit of a warm Neptune around the M-dwarf GJ 3470 with the Habitable-zone Planet Finder
2020
NINAN J., STEFANSON G., MAHADEVAN S., BENDER Ch.,ROBERTSON P.
ApJ., 894, 97
paper arxiv
Dusty outflows in planetary atmospheres: Understanding "super-puffs" and transmission spectra of sub-Neptunes
2019
WANG L. & DAI F.
ApJ. Letters, accepted
arxiv
A Sub-Neptune Exoplanet with a Low-Metallicity Methane-Depleted Atmosphere and Mie-Scattering Clouds
2019
BENNEKE B., KNUTSON H., LOTHRINGER J., CROSSFIELD I., MOSES J. et al.
Nature Astronomy, 3, 813
paper arxiv
Analyzing Eight Years of Transiting Exoplanet Observations Using WFC3's Spatial Scan Monitor
2019
STEVENSON K. & FOWLER J.
Instrument Science Report WFC3 2019-12
Exoplanet Spectroscopy and Photometry with the Twinkle Space Telescope
2018
EDWARDS B., RICE M., ZINGALES T., TESSENYI M., WALDMANN I. et al.
MNRAS, submitted
arxiv
Bright Opportunities for Atmospheric Characterization of Small Planets: Masses and Radii of K2-3 b, c, d and GJ3470 b from Radial Velocity Measurements and Spitzer Transits
2018
KOSIAREK M., CROSSFIELD I., HARDEGREE-ULLMAN K., LIVINGSTON J., BENNEKE B. et al.
Astron. J., accepted
arxiv
Hubble PanCET: An extended upper atmosphere of neutral hydrogen around the warm Neptune GJ 3470 b
2018
BOURRIER V., LECAVELIER DESC ETANGS A., EHRENREICH D., SANCHEZ-FORCADA J., ALLART R. et al.
Astron. & Astrophys., 620, A147
paper
arxiv
Trends in Atmospheric Properties of Neptune-Size Exoplanets
2017
CROSSFIELD I. & KREIDBERG L.
Astron. J., 154, 261
paper arxiv
Observing transiting planets with JWST -- Prime targets and their synthetic spectral observations
2017
MOLLIERE P., van BOEKEL R., BOUWMAN J., HENNING Th., LAGAGE P.-O. & MIN M.
Astron. & Astrophy., 600, A10
paper arxiv ADS
The GTC exoplanet transit spectroscopy survey. VI. A spectrally-resolved Rayleigh scattering slope in GJ 3470b
2017
CHEN G., GUENTHER E., PALLE E., NORTMANN L., NOWAK G. et al.
Astron. & Astrophys., 600, A138
paper arxiv ADS
Trigonometric Parallaxes and Proper Motions of 134 Southern Late M, L, and T Dwarfs from the Carnegie Astrometric Planet Search Program
2016
WEINBERGER A., BOSS A., KEISER S., ANGLADA-ESCUDE G., THOMPSON I. & BURLEY G.
Astron. J., 152, 24
paper arxiv ADS
Transit timing variation and transmission spectroscopy analyses of the hot Neptune GJ3470b
2016
AWIPHAN S., KERINS E., PICHADEE S., KOMONJINDA S., DHILLON V. et al.
MNRAS, 463, 2574
paper arxiv ADS
Energy-limited escape revised. The transition from strong planetary winds to stable thermospheres
2016
SALZ M., SCHNEIDER P., CZESLA S. & SCHMITT J.
Astron. & Astrophys., 585, L2
paper
arxiv
ADS
Marginalising instrument systematics in HST WFC3 transit lightcurves
2016
WAKEFORD H., SING D., EVANS T.,DEMING D. & MANDELL A.
ApJ, accepted
arxiv
Using near infra-red spectroscopy for characterization of transiting exoplanets
2015
ARONSON E., WALDEN P. & PISKUNOV N.
Astron. & Astrophys., 578, A133
paper arxiv ADS
Exoplanetary Geophysics -- An Emerging Discipline
2015
LAUGHLIN G. & LISSAUER J.
Review Chapter in Treatise on Geophysics, accepted
arxiv
Rayleigh Scattering in the Atmosphere of the Warm Exo-Neptune GJ 3470b
2015
DRAGOMIR D., BENNEKE B., PEARSON K., CROSSFIELD I. et al.
ApJ, 814, 102
paper arxiv ADS
The atmospheric chemistry of the warm Neptune GJ 3470b: influence of metallicity and temperature on the CH4/CO ratio
2014
VENOT O., AGUNDEZ M., SELSIS F., TESSENYI M. & IRO N.
Astron. & Astrophys., 562, A51
paper arxiv
Understanding the Mass-Radius Relation for Sub-Neptunes: Radius as a Proxy for Composition
2014
LOPEZ E. & FORTNEY J.
ApJ, 792, 1
paper arxiv ADS
Warm Ice Giant GJ 3470b. II Revised Planetary and Stellar Parameters from Optical to Near-infrared Transit Photometry
2014
BIDDLE L., PEARSON K., CROSSFIELD I., FULTON B., CICERI S. et al.
ApJ, submitted
arxiv
Near-infrared transmission spectrum of the warm-uranus GJ 3470b with the Wide Field Camera-3 on the Hubble Space Telescope
2014
EHRENREICH D., BONFILS X., LOVIS Ch., DELFOSSE X., FORVEILLE Th. et al.
Astron. & Astrophys., 570, A89
paper arxiv
Spitzer Observations of GJ3470b: a Very Low-density Neptune-size Planet Orbiting a Metal-rich M dwarf
2013
DEMORY B.-O., TORRES G., NEVES V., ROGERS L., GILLON M. & 11 additional authors
ApJ, submitted
arxiv
Optical-to-Near-Infrared Simultaneous Observations for the Hot Uranus GJ3470b: A Hint for Cloud-free Atmosphere
2013
FUKUI A., NARITA N., KUROSAKI K., IKOMA M., YANAGISAWA K. & 13 additional authors
ApJ, 770, 95
paper arxiv
Warm Ice Giant GJ 3470b. I. A Flat Transmission Spectrum Indicates a Hazy, Low-methane, and/or Metal-rich Atmosphere
2013
CROSSFIELD I., BARMAN, T. HANSEN B. &HOWARD A.
Astron. & Astrophys., 559, A33
paper arxiv
The blue sky of GJ3470b: the atmosphere of a low-mass planet unveiled by ground-based photometry
2013
NASCIMBENI V., PIOTTO G., PAGANO I., SCANDARIATO G., SANI E. & FUMANA M.
Astron. & Astrophys., 559, A32
paper arxiv
A hot Uranus transiting the nearby M dwarf GJ3470. Detected with HARPS velocimetry. Captured in transit with TRAPPIST photometry
2012
BONFILS X., GILLON M., UDRY S., ARMSTRONG D., BOUCHY F. & 13 additional authors
Astron. & Astrophys., 546, A27
paper arxiv