Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,716.28 Earth masses
Surface gravity around 10.48 g
An orbital period of 26.468 days
Semi-major axis 0.2100 AU
Equilibrium temperature 1,350 K (1077 °C)
Distance from Earth 1,557.45 light-years
Earth Similarity Index 0.124
Travel time at Voyager 1 speed 27,465,578 years
Almost certainly tidally locked to its host star given the close orbit

TYC 3667-1280-1 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,716.28 M⊕

Mass (Jupiter)

5.400 M♃

Density

4.50 g/cm³

Surface Gravity

10.48 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.124

HZ Position Unknown

Controversial No

Discovery

Year 2016

Method Radial Velocity

Facility McDonald Observatory

Telescope 9.2 m Hobby-Eberly Telescope

Size rank in cohort

Rank by radius

#1063of 1771

top 60.0%

This planet

12.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 240210 b 12.80 R⊕ HD 29985 b 12.80 R⊕ HD 148164 c 12.80 R⊕

Metric	Earth	TYC 3667-1280-1 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,716.28	317.83
Density (g/cm³)	5.51	4.50	1.33
Surface Gravity (g)	1.00	10.48	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,716.282 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 312545949

Gaia DR2

Gaia DR2 424427538624760576

Gaia DR3

Gaia DR3 424427538624760576

System

TYC 3667-1280-1

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,716.282 M⊕ · percentile 77 / cohort 1747

Orbital period 26.47 d · percentile 49 / cohort 1533

Distance 477.52 pc · percentile 74 / cohort 1759

ESI 0.124 · percentile 33 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

26.468 days

Semi-major axis

0.2100 AU

Eccentricity

0.036

Inclination

— °

Year Length

A year here lasts approximately 26.47 Earth days (7.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2100 AU.

Eq. Temperature

1,350K

(1077 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.124

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Niedzielski et al. 2016

Instrument

High Resolution Spectrograph

Publication

2016-05

Observation locale

Ground

Host System: TYC 3667-1280-1

Spectral Class

K-type orange

Effective Temperature

5,130 K — cooler than the Sun (5,778 K)

Estimated Age

1.35 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

6.260 R☉

Stellar Mass

1.870 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

3.110 dex

Systemic radial velocity

9.54 km/s

Rotational v·sin i

3.20 km/s

Rotation period

99.00 days

Metallicity ratio

[Fe/H]

Distance

477.52 parsec

Light-years 1,557.45 ly

V-band magnitude

9.86 mag

Voyager-speed travel 27,465,578 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

2.066 mas

Total Proper Motion

26.878 mas/yr

PM Right Ascension

25.93 mas/yr

PM Declination

-7.09 mas/yr

Galactic Cartesian (pc)

x = 0.510 · y = 0.117 · z = 0.852

Equatorial (J2000)

RA 12.88758° · Dec 58.42615°

Galactic ℓ, b

122.947° · -4.446°

Ecliptic λ, β

41.146° · 47.325°

HTM-20 index

-1662262916

Similar Worlds

HD 99706 c

Gas Giant · K-type orange

Radius 12.80 R⊕ · 478.1 ly

HD 135872 b

Gas Giant · K-type orange

Radius 12.80 R⊕ · 268.8 ly

WASP-132 d

Gas Giant · K-type orange

Radius 12.80 R⊕ · 400.9 ly

gam Lib c

Gas Giant · K-type orange

Radius 12.80 R⊕ · 154.6 ly

HD 240210 b

Gas Giant · K-type orange

Radius 12.80 R⊕ · 1,214.6 ly

WISPIT 1 c

Gas Giant · K-type orange

Radius 12.80 R⊕ · 750.2 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries McDonald Observatory Mission K-type orange Hosts