exoplanet_descriptions/nn_ser_abd.txt Saosier-delia (NN Ser (AB)d) - Astro
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Info for exoplanet "Saosier-delia"


Scientific (actual) data
NameNN Ser (AB)d
Planet statusConfirmed
Planet mass2.28
Orbital period2830
Semi major axis3.39
Orbit eccentricity0.2
Angular distance0.00678
Discovered2009
Updated2024-08-12
Omega74
Tperi2454520
PublicationPublished in a refereed paper
Detection typeTiming
Star nameNN Ser (AB)
Right ascension238.23°
Declination12.91°
Mag v16.6
Star distance500
Star mass0.646
Star sp typeDAO1+M4V
Star detected discIR Excess
Wikipedia articleNN Ser (AB)d

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Fictional info (?)
Suggested nameSaosier-delia
Planet typeLarge cold gas giant
Its orbital period around NN Ser (AB) of 2800 earth days is the longest of all the planets in its solar system.

Having almost no atmosphere to retain heat, it has surface temperatures that vary diurnally more than on any other planet in its solar system, ranging from 130°K (-143°C) at night to 1190°K (917°C) during the day across the equatorial regions.

It may have had hydrogen deuteride (HD) oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect.
AtmosphereWater vapor71%
2H2O25%
Hydrogen deuteride (HD)3.3%
Ammonium hydrosulfide (NH4SH)0.2%
Atmospheric pressure80 bar
artist's rendition
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