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Star with planets

WASP-39

Also Malmok · V732 Vir

Open in Ouranos
WASP-39 — Artist's impression of WASP-39 b
Artist's impression, not a photograph.Artist's impression of WASP-39 b. Credit: NASA, ESA, CSA, R. Crawford (STScI). Licence: CC BY 4.0. Source

A star with a puffy hot Saturn, WASP-39b, one of the first planets JWST studied in detail.

Measured

Distance
702 light-years
Constellation
Virgo
Position (J2000)
RA 14h 29m 18s, Dec −3.44°

How far, from the Sun

702 light-years. To cross it:

  • Light702 years
  • Voyager 1's speed12.5 million years
  • Driving at 100 km/h7.58 billion years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Facts

  • JWST made the first clear detection of carbon dioxide in an exoplanet atmosphere here, in 2022.
  • WASP-39b has about Saturn's mass but is 1.27 times Jupiter's width.
  • It orbits its star every 4 days.

Where this comes from

  • Gaia DR3 parallax 4.6435 ± 0.0144 mas, Gaia DR3 3643098875168270592 (Gaia Collaboration 2023, A&A 674, A1)

Every catalogue Ouranos draws is credited on the credits page.