Key parameters at a glance
- A radius of 12.35 Earth radii
- A mass of 89.40 Earth masses
- Surface gravity around 0.59 g
- An orbital period of 9.574 days
- Semi-major axis 0.1000 AU
- Equilibrium temperature 1,200 K (926 °C)
- Distance from Earth 728.84 light-years
- Earth Similarity Index 0.096
- Travel time at Voyager 1 speed 12,853,172 years
TOI-1842 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1338of 1771
top 75.5%
This planet
12.35R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1842 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.35 | 11.21 |
| Mass (M⊕) | 1.00 | 89.40 | 317.83 |
| Density (g/cm³) | 5.51 | 0.26 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.59 | 2.53 |
| Insolation (S⊕) | 1.00 | 354.64 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 89.400 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 404505029
Gaia DR2
Gaia DR2 3719927426253118848
Gaia DR3
Gaia DR3 3719927426253118848
System
TOI-1842
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.57 Earth days (2.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1000 AU.
Transit Fingerprint
Depth
0.317 %
Duration
4.307 h
Impact parameter b
0.782
Rp / R★
0.055714
Transit midpoint (BJD)
2,458,933.3361
Photometric dip
Transit produces a flux drop of 3,170 ppm lasting ≈ 4.31 h.
Extended Orbital Architecture
Planet / star radius ratio
0.055714
Semi-major axis / stellar radius
16.200
Impact parameter (b)
0.782
RV semi-amplitude (K)
21.700 m/s
Transit mid-time (BJD)
2,458,933.3361
Long. of periastron (ω)
67.60°
Sky-projected obliquity (λ)
-68.10°
True obliquity (ψ)
73.30°
Angular separation (arcsec)
0.44700
Eq. Temperature
1,200K
(926 °C)
Insolation (S⊕)
354.64
Earth = 1.00
Earth Similarity (ESI)
0.096
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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
Wittenmyer et al. 2022Instrument
TESS CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1842
Spectral Class
F-type yellow-white
Effective Temperature
6,039 K — hotter than the Sun (5,778 K)
Estimated Age
2.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.032 R☉
Stellar Mass
1.464 M☉
Metallicity [Fe/H]
0.33
Extended Stellar Properties
Surface gravity (log g)
3.986 dex
Stellar density
0.243 g/cm³
Rotational v·sin i
4.23 km/s
Rotation period
13.40 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.447 mas
Total Proper Motion
25.127 mas/yr
PM Right Ascension
-23.98 mas/yr
PM Declination
-7.52 mas/yr
Galactic Cartesian (pc)
x = -0.916 · y = -0.369 · z = 0.157
Equatorial (J2000)
RA 201.96266° · Dec 9.03064°
Galactic ℓ, b
330.061° · 69.961°
Ecliptic λ, β
196.791° · 16.914°
HTM-20 index
-951132531
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