WISE 0855−0714
Brown dwarf in the constellation Hydra
WISE 0855−0714
WISE 0855−0714 (full designation WISE J085510.83−071442.5, or W0855 for short) is a brown dwarf of spectral class Y4, located 7.4 light-years (2.3 parsecs) from the Sun in the constellation Hydra. It is the fourth-closest stellar or substellar system to the Sun and was discovered by Kevin Luhman in 2013 using data from the Wide-field Infrared Survey Explorer (WISE). It is the coldest brown dwarf found yet, having a temperature of about 276 K (3 °C; 37 °F). It has an estimated mass between 3 and 10 Jupiter masses, which makes it a planetary-mass object below the 13-Jupiter-mass rough limit for deuterium fusion.
Read on Wikipedia · Image NASA/ESA/CSA JWST NIRCam; Alves de Oliveira et al. & Melina Thévenot, gif-animation: 文爻林夕, CC BY-SA 4.0
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