Key parameters at a glance

A radius of 17.82 Earth radii
A mass of 699.23 Earth masses
Surface gravity around 2.20 g
An orbital period of 2.692 days
Semi-major axis 0.0438 AU
Equilibrium temperature 2,131 K (1858 °C)
Distance from Earth 1,142.69 light-years
Earth Similarity Index 0.053
Travel time at Voyager 1 speed 20,151,351 years

HAT-P-49 b Planet Profile

Physical Specs

Radius

17.82 R⊕

Radius (Jupiter)

1.590 R♃

Mass

699.23 M⊕

Mass (Jupiter)

2.200 M♃

Density

0.75 g/cm³

Surface Gravity

2.20 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.053

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility HATNet

Telescope Canon 200mm f/1.8L

Size rank in cohort

Rank by radius

#82of 1771

top 4.6%

This planet

17.82R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-66 b 17.82 R⊕ WASP-33 b 17.86 R⊕ KELT-21 b 17.78 R⊕

Metric	Earth	HAT-P-49 b	Jupiter
Radius (R⊕)	1.00	17.82	11.21
Mass (M⊕)	1.00	699.23	317.83
Density (g/cm³)	5.51	0.75	1.33
Surface Gravity (g)	1.00	2.20	2.53
Insolation (S⊕)	1.00	4,392.03	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	699.226 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 340099

TIC

TIC 99224131

Gaia DR2

Gaia DR2 1835842749465226368

Gaia DR3

Gaia DR3 1835842749465226368

System

HAT-P-49

Percentile among Gas Giant cohort

Radius 17.822 R⊕ · percentile 95 / cohort 1771

Mass 699.226 M⊕ · percentile 57 / cohort 1747

Orbital period 2.69 d · percentile 12 / cohort 1533

Distance 350.35 pc · percentile 65 / cohort 1759

ESI 0.053 · percentile 6 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.692 days

Semi-major axis

0.0438 AU

Eccentricity

0.000

Inclination

86.20 °

Year Length

A year here lasts approximately 2.69 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0438 AU.

Transit Fingerprint

Depth

0.630 %

Duration

4.109 h

Impact parameter b

0.340

Rp / R★

0.079200

Transit midpoint (BJD)

2,458,684.7553

Photometric dip

Transit produces a flux drop of 6,300 ppm lasting ≈ 4.11 h.

Extended Orbital Architecture

Planet / star radius ratio

0.079200

Semi-major axis / stellar radius

5.150

Impact parameter (b)

0.340

RV semi-amplitude (K)

188.700 m/s

Transit mid-time (BJD)

2,458,684.7553

Long. of periastron (ω)

90.00°

Sky-projected obliquity (λ)

-97.70°

Angular separation (arcsec)

0.12500

Eq. Temperature

2,131K

(1858 °C)

Insolation (S⊕)

4,392.03

Earth = 1.00

Earth Similarity (ESI)

0.053

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

Bieryla et al. 2014

Instrument

2K CCD Sensor

Publication

2014-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at HATNet (3 shown).

HAT-P-44 b · Gas Giant HAT-P-46 b · Gas Giant HAT-P-45 b · Gas Giant

Host System: HAT-P-49

Spectral Class

F-type yellow-white

Effective Temperature

6,820 K — hotter than the Sun (5,778 K)

Estimated Age

1.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.060 R☉

Stellar Mass

2.220 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.100 dex

Stellar density

0.360 g/cm³

Systemic radial velocity

15.16 km/s

Rotational v·sin i

10.68 km/s

Metallicity ratio

[Fe/H]

Distance

350.35 parsec

Light-years 1,142.69 ly

V-band magnitude

10.21 mag

Voyager-speed travel 20,151,351 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

2.826 mas

Total Proper Motion

9.397 mas/yr

PM Right Ascension

-9.20 mas/yr

PM Declination

1.90 mas/yr

Galactic Cartesian (pc)

x = 0.518 · y = -0.728 · z = 0.449

Equatorial (J2000)

RA 305.44133° · Dec 26.69268°

Galactic ℓ, b

66.922° · -5.768°

Ecliptic λ, β

316.642° · 44.561°

HTM-20 index

-1976293007