Key parameters at a glance
- A radius of 13.51 Earth radii
- A mass of 687.15 Earth masses
- Surface gravity around 3.77 g
- An orbital period of 0.767 days
- Semi-major axis 0.0143 AU
- Equilibrium temperature 1,332 K (1059 °C)
- Distance from Earth 1,059.02 light-years
- Earth Similarity Index 0.110
- Travel time at Voyager 1 speed 18,675,889 years
- Almost certainly tidally locked to its host star given the close orbit
NGTS-10 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#669of 1771
top 37.7%
This planet
13.51R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | NGTS-10 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.51 | 11.21 |
| Mass (M⊕) | 1.00 | 687.15 | 317.83 |
| Density (g/cm³) | 5.51 | 1.43 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.77 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 687.148 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 37348844
Gaia DR2
Gaia DR2 2911987212510959232
Gaia DR3
Gaia DR3 2911987212510959232
System
NGTS-10
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 18.4 hours long on a nearly circular orbit at a mean orbital distance of 0.0143 AU.
Transit Fingerprint
Duration
1.091 h
Impact parameter b
0.852
Rp / R★
0.176500
Transit midpoint (BJD)
2,457,518.8438
Extended Orbital Architecture
Planet / star radius ratio
0.176500
Semi-major axis / stellar radius
4.447
Impact parameter (b)
0.852
RV semi-amplitude (K)
594.900 m/s
Transit mid-time (BJD)
2,457,518.8438
Angular separation (arcsec)
0.04400
Eq. Temperature
1,332K
(1059 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.110
0 = alien, 1 = Earth-identical
Insufficient insolation data — 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
Mccormac et al. 2020Instrument
NGTS CCD array
Publication
2020-03
Observation locale
Ground
Host System: NGTS-10
Spectral Class
K-type orange
Effective Temperature
4,600 K — cooler than the Sun (5,778 K)
Estimated Age
10.40 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.697 R☉
Stellar Mass
0.696 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.595 dex
Systemic radial velocity
39.09 km/s
Rotational v·sin i
4.00 km/s
Rotation period
17.29 days
Activity index (log R'HK)
-4.700
Metallicity ratio
[M/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
3.080 mas
Total Proper Motion
9.847 mas/yr
PM Right Ascension
9.71 mas/yr
PM Declination
1.65 mas/yr
Galactic Cartesian (pc)
x = -0.029 · y = 0.901 · z = -0.432
Equatorial (J2000)
RA 91.87228° · Dec -25.59490°
Galactic ℓ, b
232.005° · -20.485°
Ecliptic λ, β
92.571° · -49.017°
HTM-20 index
1423137279
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