What it’s like to stand here
HD 28109 d
weight
0.60 g
sun
3.5× wider
sky
bright white

Illustration computed from this world’s measured and derived values, not a photograph.

Sub-Neptune

HD 28109 d

ESI 0.34455 lyDiscovered in 2022 by Transiting Exoplanet Survey Satellite (TESS)

Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.

HD 28109 →
host star
3.11 R⊕
radius
5.80 M⊕
mass · measured
84 days
orbital period
288°C (550°F)
avg temp
What it's like to stand here
0.60 g
your weight (measured mass)
84 days
one year, in Earth time
3.5× wider
how big its sun looks vs ours
bright white
midday sky tint
1.7×
how high you could jump vs Earth
normal
day/night cycle (not tidally locked)
How long to get there · 455 ly away
Jet airliner
546 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
710,167 years
dies en route1000-yr cryo: fails
Light speed
455 years
dies en route1000-yr cryo: survives
Warp 10
166 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthHD 28109 d is 3.1× the width of Earth
Explore from here · roam the neighborhood
HD 28109 dSub-Neptune
PlanetHD 28109 bSub-Neptune
PlanetHD 28109 cIce / gas giant
PlanetKepler-1774 bsimilar world
SystemTIC 3882526589 ly
Sky regionHydrusthis direction
Host star
HD 28109
F8 · 3 planets
Explore →
Sibling worlds in this system
Nearby star systems
Similar worlds (size · gravity · star)

Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.

Can you see it tonight? · observe
BINOCULARS NEEDED
Host-star brightnessmag 9.4
ConstellationHydrus →
To see the host star50 mm binoculars
Gear bridge

Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.

Illustration generated from HD 28109 d's confirmed parameters, not a photograph.