Key parameters at a glance
- A radius of 1.55 Earth radii
- A mass of 3.02 Earth masses
- Surface gravity around 1.26 g
- An orbital period of 19.288 days
- Semi-major axis 0.0830 AU
- Equilibrium temperature 234 K (-39 °C)
- Distance from Earth 138.31 light-years
- Earth Similarity Index 0.780
- Travel time at Voyager 1 speed 2,439,023 years
- Almost certainly tidally locked to its host star given the close orbit
Context from the literature
TOI-715 b is a super-Earth exoplanet in the habitable zone of its parent M-type star, TOI-715. The planet is 1.55 times larger than Earth, and is located at 0.083 astronomical units (12,400,000 km) from its star. The planet orbits in the habitable zone of its star and has an equilibrium temperature of 234 K (−39 °C). It was discovered by the Transiting Exoplanet Survey Satellite (TESS) in 2023; according to the authors of the discovery paper, it is the first TESS discovery in the conservative habitable zone.
Excerpted from Wikipedia · full article
TOI-715 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#652of 1176
top 55.4%
This planet
1.55R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-715 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.55 | 11.21 |
| Mass (M⊕) | 1.00 | 3.02 | 317.83 |
| Density (g/cm³) | 5.51 | 4.46 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.26 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.67 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271971130
Gaia DR2
Gaia DR2 5262666416118954368
Gaia DR3
Gaia DR3 5262666416118954368
System
TOI-715
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 19.29 Earth days (5.3% of a terrestrial year) at a mean orbital distance of 0.0830 AU.
Transit Fingerprint
Depth
0.448 %
Duration
1.980 h
Impact parameter b
0.195
Rp / R★
0.061800
Transit midpoint (BJD)
2,459,002.6305
Photometric dip
Transit produces a flux drop of 4,480 ppm lasting ≈ 1.98 h.
Extended Orbital Architecture
Planet / star radius ratio
0.061800
Impact parameter (b)
0.195
Transit mid-time (BJD)
2,459,002.6305
Angular separation (arcsec)
1.96000
Eq. Temperature
234K
(-39 °C)
Insolation (S⊕)
0.67
Earth = 1.00
Earth Similarity (ESI)
0.780
0 = alien, 1 = Earth-identical
Within the conservative habitable zone — surface water would be frozen. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Dransfield et al. 2023Instrument
TESS CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-715
Spectral Class
M-type red dwarf
Effective Temperature
3,075 K — cooler than the Sun (5,778 K)
Estimated Age
6.20 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.240 R☉
Stellar Mass
0.225 M☉
Metallicity [Fe/H]
-0.25
Extended Stellar Properties
Surface gravity (log g)
5.000 dex
Stellar density
23.154 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
23.553 mas
Total Proper Motion
83.236 mas/yr
PM Right Ascension
82.63 mas/yr
PM Declination
9.99 mas/yr
Galactic Cartesian (pc)
x = -0.114 · y = 0.259 · z = -0.959
Equatorial (J2000)
RA 113.85233° · Dec -73.57741°
Galactic ℓ, b
285.395° · -22.917°
Ecliptic λ, β
231.609° · -79.391°
HTM-20 index
2098874175
Similar Worlds
TOI-2266 b
Super-Earth · M-type red dwarf
Radius 1.54 R⊕ · 168.3 ly
Kepler-309 b
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 1,776.1 ly
K2-354 b
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 299.2 ly
Kepler-49 e
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 1,015.1 ly
HD 260655 c
Super-Earth · M-type red dwarf
Radius 1.53 R⊕ · 32.6 ly
Kepler-974 b
Super-Earth · M-type red dwarf
Radius 1.57 R⊕ · 438.1 ly