Key parameters at a glance
- A radius of 5.09 Earth radii
- A mass of 61.00 Earth masses
- Surface gravity around 2.35 g
- An orbital period of 5.057 days
- Semi-major axis 0.0633 AU
- Equilibrium temperature 1,493 K (1220 °C)
- Distance from Earth 691.87 light-years
- Earth Similarity Index 0.136
- Travel time at Voyager 1 speed 12,201,095 years
TOI-6651 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#371of 574
top 64.5%
This planet
5.09R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-6651 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.09 | 11.21 |
| Mass (M⊕) | 1.00 | 61.00 | 317.83 |
| Density (g/cm³) | 5.51 | 2.52 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.35 | 2.53 |
| Insolation (S⊕) | 1.00 | 817.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 61.000 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 60.700 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 174328045
Gaia DR2
Gaia DR2 363314964355784192
Gaia DR3
Gaia DR3 363314964357100800
System
TOI-6651
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.06 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0633 AU.
Transit Fingerprint
Depth
0.078 %
Duration
3.610 h
Impact parameter b
0.662
Rp / R★
0.027150
Transit midpoint (BJD)
2,459,857.7116
Photometric dip
Transit produces a flux drop of 784 ppm lasting ≈ 3.61 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027150
Semi-major axis / stellar radius
7.910
Impact parameter (b)
0.662
RV semi-amplitude (K)
18.900 m/s
Transit mid-time (BJD)
2,459,857.7116
Long. of periastron (ω)
116.00°
Angular separation (arcsec)
0.29800
Eq. Temperature
1,493K
(1220 °C)
Insolation (S⊕)
817.00
Earth = 1.00
Earth Similarity (ESI)
0.136
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
Baliwal et al. 2024Instrument
TESS CCD Array
Publication
2024-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-6651
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,940 K — hotter than the Sun (5,778 K)
Estimated Age
3.71 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.721 R☉
Stellar Mass
1.323 M☉
Metallicity [Fe/H]
0.23
Extended Stellar Properties
Surface gravity (log g)
4.087 dex
Stellar density
0.366 g/cm³
Rotational v·sin i
4.88 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.686 mas
Total Proper Motion
23.630 mas/yr
PM Right Ascension
10.40 mas/yr
PM Declination
-21.22 mas/yr
Galactic Cartesian (pc)
x = 0.784 · y = 0.222 · z = 0.579
Equatorial (J2000)
RA 15.78859° · Dec 35.38904°
Galactic ℓ, b
125.622° · -27.422°
Ecliptic λ, β
28.942° · 26.302°
HTM-20 index
46724138
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