What it’s like to stand here
HD 40307 f
weight
≥ 1.15 g
sun
2.9× wider
sky
amber-orange

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

Sub-Neptune

HD 40307 f

Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.

HD 40307
host star
2.13 R⊕
radius
5.20 M⊕
mass · minimum (m·sin i)
52 days
orbital period
125°C (257°F)
avg temp
What it's like to stand here
≥ 1.15 g
your weight (minimum mass only)
52 days
one year, in Earth time
2.9× wider
how big its sun looks vs ours
amber-orange
midday sky tint
0.9×
how high you could jump vs Earth
likely
likely tidally locked: probably eternal day on one side, night on the other
How long to get there · 42.2 ly away
Jet airliner
50.6 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
65,804 years
dies en route1000-yr cryo: fails
Light speed
42 years
arrives elderly
Warp 10
15 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthHD 40307 f is 2.1× the width of Earth
Explore from here · roam the neighborhood
Host star
HD 40307
K2.5 V · 5 planets
Explore →

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 7.2
ConstellationPictor
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 40307 f's confirmed parameters, not a photograph.