Planet GJ 3470 b
| 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 | 2018-12-21 | ||
| Detection Method | Primary Transit | ||
| Mass Detection Method | Radial Velocity | ||
| Radius Detection Method | Primary Transit | ||
| Primary transit | 2455953.663 (± 0.0035) JD | |
+ |
| Secondary transit | — | ||
| λ | — | ||
| 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 | — |
Star
GJ 3470| 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 |
Atmospheric parameters
Temperatures
| Data Source | Type | Result Value | Result Figure | Notes | Reference |
Molecules
| Molecule | Data Source | Type | Result Value | Result Figure | Notes | Reference |
| H | Measurements | Detected | 2018 - BOURRIER V. | |||
Observability Predictor 
Related publications
Dusty outflows in planetary atmospheres: Understanding "super-puffs" and transmission spectra of sub-Neptunes
2019
WANG L. & DAI F.
ApJ. Letters, accepted
arxiv
Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets
2019
AIRAPETIAN V., BARNES R., COHEN O., COLLINSON G., DANCHI W. et al.
Int. J. Astrobiol., submitted
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
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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
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
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
Trends in Atmospheric Properties of Neptune-Size Exoplanets
2017
CROSSFIELD I. & KREIDBERG L.
Astron. J., 154, 261
paper arxiv
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2017
MOLLIERE P., van BOEKEL R., BOUWMAN J., HENNING Th., LAGAGE P.-O. & MIN M.
Astron. & Astrophy., 600, A10
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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
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
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
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Marginalising instrument systematics in HST WFC3 transit lightcurves
2016
WAKEFORD H., SING D., EVANS T.,DEMING D. & MANDELL A.
ApJ, 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
Exoplanetary Geophysics -- An Emerging Discipline
2015
LAUGHLIN G. & LISSAUER J.
Review Chapter in Treatise on Geophysics, 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
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
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
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
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
