Key parameters at a glance
- A radius of 1.50 Earth radii
- A mass of 2.44 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 0.549 days
- Semi-major axis 0.0122 AU
- Equilibrium temperature 1,694 K (1421 °C)
- Distance from Earth 138.87 light-years
- Earth Similarity Index 0.161
- Travel time at Voyager 1 speed 2,448,956 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-1807 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#764of 1176
top 64.9%
This planet
1.50R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-1807 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.50 | 11.21 |
| Mass (M⊕) | 1.00 | 2.44 | 317.83 |
| Density (g/cm³) | 5.51 | 3.98 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,407.22 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2.440 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HIP
HIP 65469
TIC
TIC 180695581
Gaia DR2
Gaia DR2 1476485996883837184
Gaia DR3
Gaia DR3 1476485996883837184
System
TOI-1807
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 13.2 hours long on a nearly circular orbit at a mean orbital distance of 0.0122 AU.
Transit Fingerprint
Depth
0.037 %
Duration
0.977 h
Impact parameter b
0.489
Rp / R★
0.018395
Transit midpoint (BJD)
2,458,899.3450
Photometric dip
Transit produces a flux drop of 370 ppm lasting ≈ 0.98 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018395
Semi-major axis / stellar radius
2.570
Impact parameter (b)
0.489
RV semi-amplitude (K)
2.180 m/s
Transit mid-time (BJD)
2,458,899.3450
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.28700
Eq. Temperature
1,694K
(1421 °C)
Insolation (S⊕)
1,407.22
Earth = 1.00
Earth Similarity (ESI)
0.161
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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
Hedges et al. 2021Instrument
TESS CCD Array
Publication
2021-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1807
Spectral Class
K-type orange
Effective Temperature
4,914 K — cooler than the Sun (5,778 K)
Estimated Age
2.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.746 R☉
Stellar Mass
0.805 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.598 dex
Stellar density
2.717 g/cm³
Systemic radial velocity
-6.84 km/s
Rotational v·sin i
4.20 km/s
Rotation period
8.80 days
Activity index (log R'HK)
-4.363
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
23.458 mas
Total Proper Motion
127.683 mas/yr
PM Right Ascension
-124.71 mas/yr
PM Declination
-27.38 mas/yr
Galactic Cartesian (pc)
x = -0.725 · y = -0.282 · z = 0.628
Equatorial (J2000)
RA 201.28263° · Dec 38.92237°
Galactic ℓ, b
94.239° · 76.269°
Ecliptic λ, β
180.721° · 43.531°
HTM-20 index
2100905569
Similar Worlds
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Super-Earth · K-type orange
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Kepler-1968 b
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KMT-2021-BLG-0912L b
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Kepler-1614 b
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TOI-431 c
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