Key parameters at a glance
- A radius of 1.70 Earth radii
- A mass of 4.53 Earth masses
- Surface gravity around 1.56 g
- An orbital period of 3.817 days
- Semi-major axis 0.0422 AU
- Equilibrium temperature 871 K (598 °C)
- Distance from Earth 89.70 light-years
- Earth Similarity Index 0.340
- Travel time at Voyager 1 speed 1,581,872 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-836
TOI-836 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-836 b this | Super-Earth | 1.70 | 4.53 | 3.817 | 871 | 2023 |
| TOI-836.01 | Sub-Neptune | 2.59 | 9.60 | 8.595 | 665 | 2021 |
TOI-836 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#400of 1176
top 33.9%
This planet
1.70R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-836 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.70 | 11.21 |
| Mass (M⊕) | 1.00 | 4.53 | 317.83 |
| Density (g/cm³) | 5.51 | 5.02 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.56 | 2.53 |
| Insolation (S⊕) | 1.00 | 78.84 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4.530 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HIP
HIP 73427
TIC
TIC 440887364
Gaia DR2
Gaia DR2 6230733559097425152
Gaia DR3
Gaia DR3 6230733559097425152
System
TOI-836
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.82 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0422 AU.
Transit Fingerprint
Depth
0.058 %
Duration
1.805 h
Impact parameter b
0.580
Rp / R★
0.023500
Transit midpoint (BJD)
2,458,599.9953
Photometric dip
Transit produces a flux drop of 580 ppm lasting ≈ 1.81 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023500
Impact parameter (b)
0.580
RV semi-amplitude (K)
2.380 m/s
Transit mid-time (BJD)
2,458,599.9953
Long. of periastron (ω)
9.00°
Angular separation (arcsec)
1.53000
Eq. Temperature
871K
(598 °C)
Insolation (S⊕)
78.84
Earth = 1.00
Earth Similarity (ESI)
0.340
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
Hawthorn et al. 2023Instrument
TESS CCD Array
Publication
2023-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-836
Spectral Class
K-type orange
Effective Temperature
4,552 K — cooler than the Sun (5,778 K)
Estimated Age
5.40 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.665 R☉
Stellar Mass
0.678 M☉
Metallicity [Fe/H]
-0.28
Extended Stellar Properties
Surface gravity (log g)
4.743 dex
Stellar density
3.294 g/cm³
Rotational v·sin i
1.86 km/s
Rotation period
21.99 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
36.332 mas
Total Proper Motion
201.518 mas/yr
PM Right Ascension
-199.58 mas/yr
PM Declination
-27.91 mas/yr
Galactic Cartesian (pc)
x = -0.643 · y = -0.645 · z = -0.414
Equatorial (J2000)
RA 225.07988° · Dec -24.45420°
Galactic ℓ, b
336.931° · 29.777°
Ecliptic λ, β
229.626° · -7.089°
HTM-20 index
21880269
Similar Worlds
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