Exoplanet

17 Sco b

Orbiting 17 Sco

Overview

17 Sco b is an exoplanet orbiting the star 17 Sco, discovered in 2020 using the Radial Velocity method.

Key Measurements

Minimum Mass (M sin i)

1373.02

Earth masses

0500 M⊕

Orbital Period

578.4

days

0.1d10,000d

Distance

125.0

parsecs

Nearby10,000 pc

What these measurements mean

These comparisons use the reported catalog values. They are interpretations and calculations, not additional observations.

A year on this world
One orbit lasts about 1.58 Earth years. This comparison uses the reported orbital period. It does not measure the planet's rotation or the length of its day.
What the mass can tell you
M sin i is a lower bound on the true mass because the viewing angle affects the radial-velocity measurement. Do not treat it as an exact mass or use it to claim a measured density.
Work through an exoplanet comparisonArchive measurement definitions

Radius (Earth radii)

Unknown

Minimum Mass, M sin(i) (Earth masses)

1373.02

Radial-velocity minimum

Equilibrium Temperature

Unknown

Parameter source: Tala Pinto et al. 2020

Orbital Period

578.380+2.010−2.090days

Semi-Major Axis

1.4500+0.0200−0.0200au

M sin(i) (Earth masses)

1373.02+47.67−38.14

M sin(i) (Jupiter masses)

4.3200+0.1500−0.1200

Eccentricity

0.0600+0.0300−0.0200

Epoch of Periastron

2453294.41+174.23−182.91days(JD)

Argument of Periastron

57.0+113.2−106.8deg

Radial Velocity Semi-Amplitude

92.40+3.90−3.84m/s

Distance from Earth

125.0 pc (~408 ly)

Spectral Type

K3 III

Temperature

4157 K

Mass (Solar)

1.22 M☉

Radius (Solar)

25.92 R☉

Luminosity

2.25 log L☉

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

243.4621°, -11.8378°

Discovery Method

Radial Velocity

Discovery Year

2020

Data Sources
NASA Exoplanet Archive

Source ID: 17 Sco b

System Context

17 Sco b orbits 17 Sco and was reported in 2020 and was detected with the Radial Velocity method.

Published measurements list a minimum mass of 1,373.02 Earth masses (M sin i) and an orbital period of 578.38 days.

Catalog data places the system at about 125 parsecs from Earth, a host star classified as K3 III, and 1 known planet in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open 17 Sco