Key parameters at a glance

A radius of 11.10 Earth radii
A mass of 85.70 Earth masses
Surface gravity around 0.70 g
An orbital period of 416.000 days
Semi-major axis 1.0700 AU
Distance from Earth 374.64 light-years
Earth Similarity Index 0.285
Travel time at Voyager 1 speed 6,606,760 years

1 sibling around TOI-1288

TOI-1288 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
TOI-1288 b	Neptune-like	4.97	44.10	2.700	1,203	2022
TOI-1288 c this	Gas Giant	11.10	85.70	416.000	—	2022

TOI-1288 c Planet Profile

Physical Specs

Radius

11.10 R⊕

Radius (Jupiter)

0.992 R♃

Mass

85.70 M⊕

Mass (Jupiter)

0.270 M♃

Density

0.34 g/cm³

Surface Gravity

0.70 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.285

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1649of 1771

top 93.1%

This planet

11.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 109749 b 11.10 R⊕ MOA-2010-BLG-353L b 11.10 R⊕ HD 168746 b 11.10 R⊕

Metric	Earth	TOI-1288 c	Jupiter
Radius (R⊕)	1.00	11.10	11.21
Mass (M⊕)	1.00	85.70	317.83
Density (g/cm³)	5.51	0.34	1.33
Surface Gravity (g)	1.00	0.70	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	85.700 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 365733349

Gaia DR2

Gaia DR2 2245652826430109184

Gaia DR3

Gaia DR3 2245652826430109184

System

TOI-1288

Percentile among Gas Giant cohort

Radius 11.100 R⊕ · percentile 7 / cohort 1771

Mass 85.700 M⊕ · percentile 4 / cohort 1747

Orbital period 416.00 d · percentile 65 / cohort 1533

Distance 114.87 pc · percentile 37 / cohort 1759

ESI 0.285 · percentile 53 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

416.000 days

Semi-major axis

1.0700 AU

Eccentricity

0.000

Inclination

— °

Year Length

A year here lasts about 1.14 Earth years on a nearly circular orbit at a mean orbital distance of 1.0700 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

7.540 m/s

Transit mid-time (BJD)

2,458,894.4000

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

9.32000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.285

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Knudstrup et al. 2022

Instrument

Multiple Instruments

Publication

2022-12

Observation locale

Multiple Locales

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial HD 93351 b · Super-Earth GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 213519 b · Sub-Neptune HD 191939 g · Sub-Neptune GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune

Host System: TOI-1288

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,388 K — cooler than the Sun (5,778 K)

Estimated Age

6.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.958 R☉

Stellar Mass

0.955 M☉

Metallicity [Fe/H]

0.26

Extended Stellar Properties

Surface gravity (log g)

4.453 dex

Stellar density

1.517 g/cm³

Systemic radial velocity

-68.10 km/s

Metallicity ratio

[Fe/H]

Distance

114.87 parsec

Light-years 374.64 ly

V-band magnitude

10.45 mag

Voyager-speed travel 6,606,760 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.677 mas

Total Proper Motion

81.109 mas/yr

PM Right Ascension

43.25 mas/yr

PM Declination

-68.61 mas/yr

Galactic Cartesian (pc)

x = 0.283 · y = -0.301 · z = 0.911

Equatorial (J2000)

RA 313.16703° · Dec 65.60878°

Galactic ℓ, b

101.443° · 13.286°

Ecliptic λ, β

16.913° · 72.825°

HTM-20 index

632623802