Key parameters at a glance

A radius of 12.29 Earth radii
A mass of 1,369.85 Earth masses
Surface gravity around 9.08 g
An orbital period of 2.508 days
Semi-major axis 0.0378 AU
Equilibrium temperature 1,681 K (1408 °C)
Distance from Earth 2,399.21 light-years
Earth Similarity Index 0.097
Travel time at Voyager 1 speed 42,310,010 years

Qatar-3 b Planet Profile

Physical Specs

Radius

12.29 R⊕

Radius (Jupiter)

1.096 R♃

Mass

1,369.85 M⊕

Mass (Jupiter)

4.310 M♃

Density

4.00 g/cm³

Surface Gravity

9.08 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.097

HZ Position Inner

Controversial No

Discovery

Year 2017

Method Transit

Facility Qatar

Telescope Canon 400mm f/2.8L

Size rank in cohort

Rank by radius

#1389of 1771

top 78.4%

This planet

12.29R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-170 b 12.29 R⊕ TOI-4127 b 12.29 R⊕ HATS-58 A b 12.27 R⊕

Metric	Earth	Qatar-3 b	Jupiter
Radius (R⊕)	1.00	12.29	11.21
Mass (M⊕)	1.00	1,369.85	317.83
Density (g/cm³)	5.51	4.00	1.33
Surface Gravity (g)	1.00	9.08	2.53
Insolation (S⊕)	1.00	1,330.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,369.847 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 291751373

Gaia DR2

Gaia DR2 2878641361300809856

Gaia DR3

Gaia DR3 2878641361300809856

System

Qatar-3

Percentile among Gas Giant cohort

Radius 12.285 R⊕ · percentile 22 / cohort 1771

Mass 1,369.847 M⊕ · percentile 73 / cohort 1747

Orbital period 2.51 d · percentile 11 / cohort 1533

Distance 735.60 pc · percentile 82 / cohort 1759

ESI 0.097 · percentile 25 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.508 days

Semi-major axis

0.0378 AU

Eccentricity

0.000

Inclination

86.80 °

Year Length

A year here lasts approximately 2.51 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0378 AU.

Transit Fingerprint

Depth

0.789 %

Duration

3.110 h

Impact parameter b

0.350

Rp / R★

0.088800

Transit midpoint (BJD)

2,457,302.4530

Photometric dip

Transit produces a flux drop of 7,890 ppm lasting ≈ 3.11 h.

Extended Orbital Architecture

Planet / star radius ratio

0.088800

Semi-major axis / stellar radius

6.390

Impact parameter (b)

0.350

RV semi-amplitude (K)

587.000 m/s

Transit mid-time (BJD)

2,457,302.4530

Angular separation (arcsec)

0.05140

Eq. Temperature

1,681K

(1408 °C)

Insolation (S⊕)

1,330.00

Earth = 1.00

Earth Similarity (ESI)

0.097

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

Alsubai et al. 2017

Instrument

FLI ProLine 4K CCD Sensor

Publication

2017-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2017 at Qatar (3 shown).

Qatar-6 b · Gas Giant Qatar-4 b · Gas Giant Qatar-5 b · Gas Giant

Host System: Qatar-3

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

6,007 K — hotter than the Sun (5,778 K)

Estimated Age

0.31 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.272 R☉

Stellar Mass

1.145 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.286 dex

Stellar density

0.780 g/cm³

Systemic radial velocity

6.04 km/s

Rotational v·sin i

10.20 km/s

Rotation period

6.31 days

Metallicity ratio

[Fe/H]

Distance

735.60 parsec

Light-years 2,399.21 ly

V-band magnitude

12.93 mag

Voyager-speed travel 42,310,010 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.332 mas

Total Proper Motion

11.499 mas/yr

PM Right Ascension

-7.76 mas/yr

PM Declination

-8.48 mas/yr

Galactic Cartesian (pc)

x = 0.807 · y = -0.012 · z = 0.591

Equatorial (J2000)

RA 359.15197° · Dec 36.21296°

Galactic ℓ, b

110.718° · -25.355°

Ecliptic λ, β

15.517° · 33.147°

HTM-20 index

-488990633