WISE 0855−0714

Hydra · Coldest known brown dwarf (~285 K). Invisible in optical, bright at 4.5 µm, fast-moving.

RA: 08h55m10.83s
Dec: −07°14′42.5″
RA (deg): 133.79513
Dec (deg): -7.24515
Motion: 41.98″/yr
Fit T_eff: 300 K

102-band SPHEREx spectrum (SED)

5-second sweep from 0.75 to 5.0 µm — higher pitch means brighter infrared flux.

?ra=133.79513&dec=-7.24515&fov=1

Multi-Survey Cross-Match

Same coordinates and field of view in every survey. If the object sits on the crosshair in SPHEREx but is offset or missing in older images, it has moved — or it's new.

SPHEREx · 0.75–5.0 µm · 2025–26 (simulated)

DSS2 Optical image at RA 133.795 Dec -7.245 — **DSS2 Optical** · Visible · 1980s–1990s

2MASS image at RA 133.795 Dec -7.245 — **2MASS** · Near-IR J/H/Ks · 1997–2001

AllWISE image at RA 133.795 Dec -7.245 — **AllWISE** · Mid-IR 3.4/4.6 µm · 2010–2011

unWISE / NEOWISE image at RA 133.795 Dec -7.245 — **unWISE / NEOWISE** · W1+W2 · 2010–2020 coadd

CDS Portal SIMBAD IRSA Finder Chart

Historical images: CDS HiPS, falling back to NASA SkyView. SPHEREx tile is the app's simulated field.