Key parameters at a glance

A radius of 14.39 Earth radii
A mass of 156.68 Earth masses
Surface gravity around 0.76 g
An orbital period of 4.463 days
Semi-major axis 0.0577 AU
Equilibrium temperature 1,458 K (1185 °C)
Distance from Earth 948.25 light-years
Earth Similarity Index 0.075
Travel time at Voyager 1 speed 16,722,439 years

HAT-P-46 b Planet Profile

Physical Specs

Radius

14.39 R⊕

Radius (Jupiter)

1.284 R♃

Mass

156.68 M⊕

Mass (Jupiter)

0.493 M♃

Density

0.28 g/cm³

Surface Gravity

0.76 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.075

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

#293of 1771

top 16.5%

This planet

14.39R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-6029 b 14.39 R⊕ Qatar-8 b 14.40 R⊕ Kepler-485 b 14.41 R⊕

Metric	Earth	HAT-P-46 b	Jupiter
Radius (R⊕)	1.00	14.39	11.21
Mass (M⊕)	1.00	156.68	317.83
Density (g/cm³)	5.51	0.28	1.33
Surface Gravity (g)	1.00	0.76	2.53
Insolation (S⊕)	1.00	1,405.48	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	156.684 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 104866616

Gaia DR2

Gaia DR2 4177560894633502720

Gaia DR3

Gaia DR3 4177560894633502720

System

HAT-P-46

Percentile among Gas Giant cohort

Radius 14.392 R⊕ · percentile 83 / cohort 1771

Mass 156.684 M⊕ · percentile 13 / cohort 1747

Orbital period 4.46 d · percentile 33 / cohort 1533

Distance 290.74 pc · percentile 59 / cohort 1759

ESI 0.075 · percentile 16 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.463 days

Semi-major axis

0.0577 AU

Eccentricity

0.123

Inclination

85.50 °

Year Length

A year here lasts approximately 4.46 Earth days (1.2% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0577 AU.

Transit Fingerprint

Depth

0.798 %

Duration

3.098 h

Impact parameter b

0.626

Rp / R★

0.094200

Transit midpoint (BJD)

2,455,701.3365

Photometric dip

Transit produces a flux drop of 7,984 ppm lasting ≈ 3.10 h.

Extended Orbital Architecture

Planet / star radius ratio

0.094200

Semi-major axis / stellar radius

8.860

Impact parameter (b)

0.626

RV semi-amplitude (K)

52.200 m/s

Transit mid-time (BJD)

2,455,701.3365

Long. of periastron (ω)

70.00°

Angular separation (arcsec)

0.19800

Eq. Temperature

1,458K

(1185 °C)

Insolation (S⊕)

1,405.48

Earth = 1.00

Earth Similarity (ESI)

0.075

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

Hartman et al. 2014

Instrument

2K CCD Sensor

Publication

2014-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at HATNet (3 shown).

HAT-P-44 b · Gas Giant HAT-P-45 b · Gas Giant HAT-P-49 b · Gas Giant

Host System: HAT-P-46

Spectral Class

F-type yellow-white

Effective Temperature

6,120 K — hotter than the Sun (5,778 K)

Estimated Age

2.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.396 R☉

Stellar Mass

1.284 M☉

Metallicity [Fe/H]

0.30

Extended Stellar Properties

Surface gravity (log g)

4.250 dex

Stellar density

0.915 g/cm³

Systemic radial velocity

-20.91 km/s

Rotational v·sin i

4.90 km/s

Metallicity ratio

[Fe/H]

Distance

290.74 parsec

Light-years 948.25 ly

V-band magnitude

12.00 mag

Voyager-speed travel 16,722,439 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.412 mas

Total Proper Motion

6.353 mas/yr

PM Right Ascension

-4.57 mas/yr

PM Declination

-4.41 mas/yr

Galactic Cartesian (pc)

x = 0.008 · y = -0.999 · z = -0.052

Equatorial (J2000)

RA 270.44418° · Dec -2.97098°

Galactic ℓ, b

24.531° · 9.640°

Ecliptic λ, β

270.470° · 20.468°

HTM-20 index

1660469242