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51 Pegasi b

51 Pegasi · G5V · 5761 K
Modelled Radial Velocity

Planet data ()

Colour ·
Base hex
Reflected brightness (Y)
Confidence
Out of sRGB gamut
Planet
Equilibrium temp1329 K
Radius14.1 R⊕
Mass193.9 M⊕
Semi-major axis0.052 AU
DiscoveryRadial Velocity · 1995
Both colours are modelled predictions, not photographs. The full-spectrum swatch is our most complete model; the Roman view is coarser (four bands). This planet's light has never been isolated by any telescope.

Render fidelity + style are on the scope controls below. Spectrum engine: PICASO radiative transfer. Model assumptions — cloud state: hot, cloud-free, alkali (sodium) absorption; metallicity: 1.0× solar; phase angle: 0°.
◼ EXOSCOPE 51 Pegasi b · reflected-light · 380–780 nm VIEW
Roman is blind here 0.110.220.320.43 380 nm 780 nm
CH1 FULL
CH2 ROMAN #ffbab4
ΔE2000 41.3
Y BRIGHT
CONF
GAMUT
ΔE = perceptual distance (full vs Roman). <575 nm: Roman blind, flat-held.
RENDER CONTROLS
Style
Shape
PALETTE ▸
#002e5c
#0057ad
#0080ff
#70b8ff
#c2e1ff
#5c0700
#ad0e00
#ffbab4
#ff7c70
#ffc7c2
.ASE
Colours derived from reflected-light albedo models × host-star spectra via CIE 1931 colour matching. Modelled, not photographed. Data: NASA Exoplanet Archive.