Key parameters at a glance

A radius of 12.90 Earth radii
A mass of 1,373.02 Earth masses
Surface gravity around 8.25 g
An orbital period of 578.380 days
Semi-major axis 1.4500 AU
Distance from Earth 407.54 light-years
Earth Similarity Index 0.422
Travel time at Voyager 1 speed 7,186,998 years

17 Sco b Planet Profile

Physical Specs

Radius

12.90 R⊕

Radius (Jupiter)

1.150 R♃

Mass

1,373.02 M⊕

Mass (Jupiter)

4.320 M♃

Density

3.51 g/cm³

Surface Gravity

8.25 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.422

HZ Position Unknown

Controversial No

Discovery

Year 2020

Method Radial Velocity

Facility Lick Observatory

Telescope Coude Auxiliary Telescope

Size rank in cohort

Rank by radius

#1011of 1771

top 57.0%

This planet

12.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 55696 b 12.90 R⊕ HD 24040 b 12.90 R⊕ BD-210397 c 12.90 R⊕

Metric	Earth	17 Sco b	Jupiter
Radius (R⊕)	1.00	12.90	11.21
Mass (M⊕)	1.00	1,373.02	317.83
Density (g/cm³)	5.51	3.51	1.33
Surface Gravity (g)	1.00	8.25	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,373.019 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 79540

TIC

TIC 135596590

Gaia DR2

Gaia DR2 4342464209753404416

Gaia DR3

Gaia DR3 4342464209753404416

System

17 Sco

Percentile among Gas Giant cohort

Radius 12.900 R⊕ · percentile 41 / cohort 1771

Mass 1,373.019 M⊕ · percentile 73 / cohort 1747

Orbital period 578.38 d · percentile 70 / cohort 1533

Distance 124.95 pc · percentile 40 / cohort 1759

ESI 0.422 · percentile 92 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

578.380 days

Semi-major axis

1.4500 AU

Eccentricity

0.060

Inclination

— °

Year Length

A year here lasts about 1.58 Earth years on a nearly circular orbit at a mean orbital distance of 1.4500 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.422

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Tala Pinto et al. 2020

Instrument

Hamilton Echelle Spectrograph

Publication

2020-12

Observation locale

Ground

Host System: 17 Sco

Spectral Class

K-type orange

Effective Temperature

4,157 K — cooler than the Sun (5,778 K)

Estimated Age

5.13 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

25.920 R☉

Stellar Mass

1.220 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

1.700 dex

Rotational v·sin i

3.98 km/s

Rotation period

329.49 days

Metallicity ratio

[Fe/H]

Distance

124.95 parsec

Light-years 407.54 ly

V-band magnitude

5.23 mag

Voyager-speed travel 7,186,998 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

7.981 mas

Total Proper Motion

10.668 mas/yr

PM Right Ascension

-5.63 mas/yr

PM Declination

-9.06 mas/yr

Galactic Cartesian (pc)

x = -0.437 · y = -0.876 · z = -0.205

Equatorial (J2000)

RA 243.46209° · Dec -11.83779°

Galactic ℓ, b

1.303° · 27.343°

Ecliptic λ, β

243.701° · 9.212°

HTM-20 index

649404373

Similar Worlds

HD 112640 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 1,054.6 ly

HIP 66074 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 115.6 ly

HIP 70849 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 78.5 ly

HD 111591 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 372.4 ly

HD 102272 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 1,132.1 ly

GJ 86 b

Gas Giant · K-type orange

Radius 12.90 R⊕ · 35.2 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Lick Observatory Mission K-type orange Hosts