 ;indicator name="01-sky-coordinates" ; ;templatestyles src="Template:Sky/styles.css" / ;Coordinates: &amp;show_grid=1&amp;show_constellation_lines=1&amp;show_constellation_boundaries=1&amp;show_const_names=1&amp;show_galaxies=1&amp;img_source=IMG_all 18h 28m 31.10s, +26° 50′ 37.79″ ;/indicator ;
Rogue planet or brown dwarf in the constellation Lyra
Possible binarity.
Comparison between WISE 1828+2650 and WD 0806-661 B may suggest that WISE 1828+2650 is a system of two equal-mass objects. Observations with Hubble Space Telescope (HST) and Keck-II LGS-AO system had not revealed binarity, suggesting that if any such companion exists, it would have an orbit less than 0.5 AU, and no direct evidence for binarity yet exists. However, the spectrum of the system best fits a pair of brown dwarfs, each with an effective temperature of about 325 K and a mass of about 5 MJ.
JWST NIRCam imaging observations did not find a companion at a separation larger than 0.5 astronomical units. NIRSpec low resolution prism observations cannot be explained with existing Sonora Bobcat models of planetary objects, neither single nor multiple. The binary model fails to provide an improved fit for the existing photometric data. A newer analysis of the NIRSpec data compared radius determined with atmospheric retrieval framework CHIMERA and evolutionary model Sonora Bobcat. The CHIMERA radius for a single object ( RJ) compared with predicted radius from Sonora Bobcat (10 Gyrs, 33 MJ,0.87 RJ) is too large for its age, which might be an indication that WISE 1828+2650 is an equal mass binary with both objects having a radius of 0.87 RJ. The estimated semi-major axis of this binary is astronomical units or RJ. Sonora Bobcat however predicts a lower age (1.4 Gyrs) and mass (9.982 MJ) when using the temperature and gravity from Sonora Elf Owl atmospheric model grid. Future observations could look for radial velocity variations to confirm the binary.
See also.
The other six discoveries of brown dwarfs, published by Cushing et al. in 2011:
Lists:
Notes.
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References.
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