Both colours are modelled predictions, not photographs. The
full-spectrum swatch is our most complete model; the Roman view is coarser (four
bands).
For this Roman tech-demo target, the four-band view will be replaced by
real measured data once Roman observes it — the only real colour
data this planet will ever have.
Render fidelity + style are on the scope controls below. Spectrum engine:
the Cahoy et al. 2010 grid.
Model assumptions — cloud state: temperate, water/ammonia clouds;
metallicity: 3.0× solar;
phase angle: 0°.
◼ EXOSCOPEupsilon Andromedae d · reflected-light · 380–780 nmVIEW
Full spectrum — the colour computed from the complete 380–780 nm
reflected-light model. Roman 4-band — the same light as the Roman Space
Telescope's Coronagraph would see it, through just four filters. Both are
modelled, not photographs; flipping between them shows how much of a
planet's colour survives Roman's coarse filter set.Classic — surface colour and brightness taken straight from the physics
model (cloud bands are schematic). Stylised — that same colour restyled
into warm/cool bands and turbulence for looks: prettier, not more accurate. The palette
below is identical either way — only the picture changes.
CH1 FULL
CH2 ROMAN #d1caca
ΔE20001.4
Y BRIGHT
CONF
GAMUT
ΔE = perceptual distance (full vs Roman).
<575 nm: Roman blind, flat-held.