Key parameters at a glance
- A radius of 4.70 Earth radii
- A mass of 30.80 Earth masses
- Surface gravity around 1.39 g
- An orbital period of 4.052 days
- Semi-major axis 0.0417 AU
- Equilibrium temperature 700 K (427 °C)
- Distance from Earth 171.61 light-years
- Earth Similarity Index 0.300
- Travel time at Voyager 1 speed 3,026,346 years
- Almost certainly tidally locked to its host star given the close orbit
LP 714-47 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#432of 574
top 75.1%
This planet
4.70R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | LP 714-47 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.70 | 11.21 |
| Mass (M⊕) | 1.00 | 30.80 | 317.83 |
| Density (g/cm³) | 5.51 | 1.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.39 | 2.53 |
| Insolation (S⊕) | 1.00 | 38.54 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 30.800 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 70899085
Gaia DR2
Gaia DR2 3189306030970782208
Gaia DR3
Gaia DR3 3189306030970782208
System
LP 714-47
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.05 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0417 AU.
Transit Fingerprint
Depth
0.551 %
Duration
1.561 h
Impact parameter b
0.757
Rp / R★
0.075100
Transit midpoint (BJD)
2,458,774.7034
Photometric dip
Transit produces a flux drop of 5,512 ppm lasting ≈ 1.56 h.
Extended Orbital Architecture
Planet / star radius ratio
0.075100
Semi-major axis / stellar radius
15.900
Impact parameter (b)
0.757
RV semi-amplitude (K)
17.600 m/s
Transit mid-time (BJD)
2,458,774.7034
Long. of periastron (ω)
219.00°
Angular separation (arcsec)
0.79300
Eq. Temperature
700K
(427 °C)
Insolation (S⊕)
38.54
Earth = 1.00
Earth Similarity (ESI)
0.300
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Dreizler et al. 2020Instrument
TESS CCD Array
Publication
2020-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: LP 714-47
Spectral Class
M-type red dwarf
Effective Temperature
3,950 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.584 R☉
Stellar Mass
0.590 M☉
Metallicity [Fe/H]
0.41
Extended Stellar Properties
Surface gravity (log g)
4.640 dex
Stellar density
3.733 g/cm³
Systemic radial velocity
-8.04 km/s
Rotational v·sin i
2.00 km/s
Rotation period
33.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
18.977 mas
Total Proper Motion
203.434 mas/yr
PM Right Ascension
49.77 mas/yr
PM Declination
-197.25 mas/yr
Galactic Cartesian (pc)
x = 0.426 · y = 0.880 · z = -0.209
Equatorial (J2000)
RA 64.19022° · Dec -12.08486°
Galactic ℓ, b
206.041° · -39.734°
Ecliptic λ, β
59.552° · -32.837°
HTM-20 index
135833636
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