Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,913.34 Earth masses
Surface gravity around 11.68 g
An orbital period of 103.950 days
Semi-major axis 0.4500 AU
Distance from Earth 174.46 light-years
Earth Similarity Index 0.438
Travel time at Voyager 1 speed 3,076,525 years

Context from the literature

HD 145377 b is an extrasolar planet located approximately 180 light-years away This planet was discovered on October 26, 2008 by Moutou et al. using the HARPS spectrograph on ESO's 3.6 meter telescope installed at La Silla Observatory in Atacama Desert, Chile.

Excerpted from Wikipedia · full article

HD 145377 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,913.34 M⊕

Mass (Jupiter)

6.020 M♃

Density

5.01 g/cm³

Surface Gravity

11.68 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.438

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#1063of 1771

top 60.0%

This planet

12.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 240210 b 12.80 R⊕ HD 29985 b 12.80 R⊕ HD 148164 c 12.80 R⊕

Metric	Earth	HD 145377 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,913.34	317.83
Density (g/cm³)	5.51	5.01	1.33
Surface Gravity (g)	1.00	11.68	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,913.337 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 145377

HIP

HIP 79346

TIC

TIC 68165288

Gaia DR2

Gaia DR2 6042491773948918656

Gaia DR3

Gaia DR3 6042491773948918656

System

HD 145377

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,913.337 M⊕ · percentile 79 / cohort 1747

Orbital period 103.95 d · percentile 53 / cohort 1533

Distance 53.49 pc · percentile 22 / cohort 1759

ESI 0.438 · percentile 97 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

103.950 days

Semi-major axis

0.4500 AU

Eccentricity

0.310

Inclination

— °

Year Length

A year here lasts approximately 103.95 Earth days (28.5% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.4500 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.438

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Moutou et al. 2009

Instrument

HARPS Spectrograph

Publication

2009-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at La Silla Observatory (12 shown).

HD 285968 b · Sub-Neptune HD 47186 b · Neptune-like BD-17 63 b · Gas Giant HD 73267 b · Gas Giant HD 153950 b · Gas Giant HD 181433 d · Gas Giant HD 60532 c · Gas Giant HD 45364 b · Neptune-like HD 20868 b · Gas Giant HD 60532 b · Gas Giant HD 45364 c · Gas Giant HD 47186 c · Gas Giant

Host System: HD 145377

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

6,014 K — hotter than the Sun (5,778 K)

Estimated Age

1.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.050 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

1.209 g/cm³

Systemic radial velocity

11.45 km/s

Rotational v·sin i

5.00 km/s

Activity index (log R'HK)

-4.740

Metallicity ratio

[Fe/H]

Distance

53.49 parsec

Light-years 174.46 ly

V-band magnitude

9.24 mag

Voyager-speed travel 3,076,525 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.667 mas

Total Proper Motion

25.390 mas/yr

PM Right Ascension

21.79 mas/yr

PM Declination

13.04 mas/yr

Galactic Cartesian (pc)

x = -0.406 · y = -0.793 · z = -0.455

Equatorial (J2000)

RA 242.90197° · Dec -27.07812°

Galactic ℓ, b

348.639° · 17.539°

Ecliptic λ, β

245.934° · -5.874°

HTM-20 index

531555907

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