Key parameters at a glance
- A radius of 5.03 Earth radii
- A mass of 22.30 Earth masses
- Surface gravity around 0.88 g
- An orbital period of 10.509 days
- Semi-major axis 0.0843 AU
- Equilibrium temperature 635 K (362 °C)
- Distance from Earth 399.17 light-years
- Earth Similarity Index 0.296
- Travel time at Voyager 1 speed 7,039,350 years
- Almost certainly tidally locked to its host star given the close orbit
TIC 88785435 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#379of 574
top 65.9%
This planet
5.03R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TIC 88785435 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.03 | 11.21 |
| Mass (M⊕) | 1.00 | 22.30 | 317.83 |
| Density (g/cm³) | 5.51 | 0.96 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.88 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 88785435
Gaia DR2
Gaia DR2 6205812887538362624
Gaia DR3
Gaia DR3 6205812887538362624
System
TIC 88785435
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.51 Earth days (2.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0843 AU.
Transit Fingerprint
Duration
4.100 h
Rp / R★
0.050800
Transit midpoint (BJD)
2,458,609.2369
Extended Orbital Architecture
Planet / star radius ratio
0.050800
Semi-major axis / stellar radius
19.890
Transit mid-time (BJD)
2,458,609.2369
Long. of periastron (ω)
-25.00°
Angular separation (arcsec)
0.68900
Eq. Temperature
635K
(362 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.296
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Vach et al. 2025Instrument
TESS CCD Array
Publication
2025-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TIC 88785435
Spectral Class
K-type orange
Effective Temperature
3,998 K — cooler than the Sun (5,778 K)
Estimated Age
0.02 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.911 R☉
Stellar Mass
0.724 M☉
Metallicity [Fe/H]
-0.08
Extended Stellar Properties
Surface gravity (log g)
4.190 dex
Stellar density
1.082 g/cm³
Rotational v·sin i
10.00 km/s
Rotation period
8.49 days
Metallicity ratio
[m/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
8.142 mas
Total Proper Motion
36.106 mas/yr
PM Right Ascension
-24.51 mas/yr
PM Declination
-26.51 mas/yr
Galactic Cartesian (pc)
x = -0.614 · y = -0.599 · z = -0.513
Equatorial (J2000)
RA 224.28386° · Dec -30.88003°
Galactic ℓ, b
332.437° · 24.694°
Ecliptic λ, β
230.819° · -13.446°
HTM-20 index
-930167021
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