Kepler-37d

Kepler-37d
Discovery[1]
Discovery siteKepler space telescope
Discovery date2013
Transit
Orbital characteristics[2]
0.2109±0.0030 AU
Eccentricity<0.10
39.7922622(65) d
Inclination89.335°+0.043°
−0.047°
StarKepler-37
Physical characteristics[2]
2.030+0.030
−0.039 R🜨
Mass5.4±1.4 M🜨[3] or <2.0 M🜨[2]
Mean density
4.29+0.52
−0.74 g/cm3[3] or <1.3 g/cm3[2]
Temperature499±7 K (226 °C; 439 °F, equilibrium)

Kepler-37d is an exoplanet discovered by the Kepler space telescope in February 2013.[4] It is located 209 light years away,[5] in the constellation Lyra.[4] With an orbital period of 39.8 days,[3] it is the largest of the three known planets orbiting its parent star Kepler-37.[6]

A 2021 study detected Kepler-37d via radial velocity, finding a mass of about 5.4 ME,[3] but a 2023 study instead found an upper limit on its mass of only 2 ME.[2] In either case, it is not a rocky planet, but a low-density planet rich in volatiles.

In 2015, a grant was approved to further expand the Sagan Planet Walk by installing a Kepler-37d station on the Moon 384,500 kilometers (238,900 mi) away.[7][8]

  1. ^ Cite error: The named reference Barclay2013 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Bonomo2023 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Rajpaul2021 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Black was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Harwood was invoked but never defined (see the help page).
  7. ^ "Tompkins County Strategic Tourism Planning Board" (PDF). Tompkins County NY. April 15, 2015. Archived from the original (PDF) on December 27, 2016. Retrieved March 5, 2016.
  8. ^ "Kepler-37d".