Key parameters at a glance

A radius of 18.05 Earth radii
A mass of 1,430.18 Earth masses
Surface gravity around 4.39 g
An orbital period of 2.486 days
Semi-major axis 0.0308 AU
Equilibrium temperature 2,034 K (1761 °C)
Distance from Earth 5,308.61 light-years
Earth Similarity Index 0.060
Travel time at Voyager 1 speed 93,617,383 years

OGLE2-TR-L9 b Planet Profile

Physical Specs

Radius

18.05 R⊕

Radius (Jupiter)

1.610 R♃

Mass

1,430.18 M⊕

Mass (Jupiter)

4.500 M♃

Density

1.25 g/cm³

Surface Gravity

4.39 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.060

HZ Position Inner

Controversial No

Discovery

Year 2008

Method Transit

Facility OGLE

Telescope 1.3 m Warsaw University Telescope

Size rank in cohort

Rank by radius

#72of 1771

top 4.0%

This planet

18.05R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

NGTS-31 b 18.05 R⊕ TrES-4 b 18.05 R⊕ HAT-P-65 b 18.06 R⊕

Metric	Earth	OGLE2-TR-L9 b	Jupiter
Radius (R⊕)	1.00	18.05	11.21
Mass (M⊕)	1.00	1,430.18	317.83
Density (g/cm³)	5.51	1.25	1.33
Surface Gravity (g)	1.00	4.39	2.53
Insolation (S⊕)	1.00	4,135.45	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,430.175 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 466840711

Gaia DR2

Gaia DR2 5337273743301313536

Gaia DR3

Gaia DR3 5337273743301313536

System

OGLE2-TR-L9

Percentile among Gas Giant cohort

Radius 18.046 R⊕ · percentile 96 / cohort 1771

Mass 1,430.175 M⊕ · percentile 73 / cohort 1747

Orbital period 2.49 d · percentile 10 / cohort 1533

Distance 1,627.63 pc · percentile 90 / cohort 1759

ESI 0.060 · percentile 9 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.486 days

Semi-major axis

0.0308 AU

Eccentricity

—

Inclination

79.80 °

Year Length

A year here lasts approximately 2.49 Earth days (0.7% of a terrestrial year) at a mean orbital distance of 0.0308 AU.

Transit Fingerprint

Depth

1.177 %

Duration

2.739 h

Transit midpoint (BJD)

2,454,492.7977

Photometric dip

Transit produces a flux drop of 11,770 ppm lasting ≈ 2.74 h.

Extended Orbital Architecture

Semi-major axis / stellar radius

5.807

RV semi-amplitude (K)

510.000 m/s

Transit mid-time (BJD)

2,454,492.7977

Angular separation (arcsec)

0.01890

Eq. Temperature

2,034K

(1761 °C)

Insolation (S⊕)

4,135.45

Earth = 1.00

Earth Similarity (ESI)

0.060

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

Snellen et al. 2009

Instrument

OGLE CCD Array

Publication

2009-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at OGLE (2 shown).

OGLE-2006-BLG-109L b · Gas Giant OGLE-2006-BLG-109L c · Gas Giant

Host System: OGLE2-TR-L9

Spectral Class

F-type yellow-white

Effective Temperature

6,933 K — hotter than the Sun (5,778 K)

Estimated Age

1.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.530 R☉

Stellar Mass

1.520 M☉

Metallicity [Fe/H]

-0.05

Extended Stellar Properties

Surface gravity (log g)

4.250 dex

Stellar density

0.597 g/cm³

Rotational v·sin i

39.33 km/s

Metallicity ratio

[Fe/H]

Distance

1,627.63 parsec

Light-years 5,308.61 ly

V-band magnitude

14.72 mag

Voyager-speed travel 93,617,383 yr

Multi-band Host Photometry — 7 bands

Astrometric Data

Parallax

0.587 mas

Total Proper Motion

5.161 mas/yr

PM Right Ascension

-4.52 mas/yr

PM Declination

2.49 mas/yr

Galactic Cartesian (pc)

x = -0.470 · y = 0.109 · z = -0.876

Equatorial (J2000)

RA 166.97988° · Dec -61.14625°

Galactic ℓ, b

290.771° · -0.743°

Ecliptic λ, β

207.868° · -57.868°

HTM-20 index

-1989560613