XO-5b

XO-5b / Makropulos
Size comparison of Jupiter (left) with XO-5b (right).
Discovery
Discovered byXO Project[1]
Discovery siteXO Telescope at Maui, Hawaii[1]
Discovery date2008
Transit[1]
Orbital characteristics
0.0488 ± 0.0006 AU (7,300,000 ± 90,000 km)[2]
Eccentricity0[note 1]
4.1877545 ± 0.0000016[3] d
Inclination86.7 ± 0.4[2]
Semi-amplitude144.9 ± 2.0[2]
StarXO-5
Physical characteristics
1.109 ± 0.050[2] RJ
Mass1.059 ± 0.028[2] MJ
Mean density
0.96+0.14
−0.11[2] g cm−3
22 ± 5 m/s2 (72 ± 16 ft/s2)[1]
Temperature1221 ± 27 K[2]

XO-5b "Makropulos" is an extrasolar planet approximately 910 light years away in the constellation of Lynx. This planet was found by the transit method using the XO Telescope and announced in May 2008. It was also independently discovered by the HATNet Project. The planet has a mass and radius just slightly larger than that of Jupiter. This planet orbits very close to the G-type parent star, as it is typical for transiting planets, classing this as Hot Jupiter. It takes only 4.188 days (or 100.5 hours) to orbit at an orbital distance of 0.0488 AU).[1][2]

The planet XO-5b is named Makropulos. The name was selected in the NameExoWorlds campaign by the Czech Republic, during the 100th anniversary of the IAU. Makropulos is the name from Karel Čapek's play Věc Makropulos (The Makropulos Affair).[4][5]

  1. ^ a b c d e Cite error: The named reference Burke2008 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Pál2009 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Sada2012 was invoked but never defined (see the help page).
  4. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  5. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.


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