Complete world information

Teegarden's Star b

Its Earth-like minimum mass and nearby location make it an important candidate, though little is known about its atmosphere.

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Scientific status

No exoplanet is confirmed habitable or inhabited. Habitable-zone position only means that liquid surface water could be possible under the right atmospheric conditions. Rate the Earth percentages are editorial comparison scores, not scientific probabilities.

Rate the Earth habitability percentages are editorial comparison scores, not scientific proof of habitability or life.
NASA-style scientific artist conceptNearby green-blue rocky world concept
Rate the Earth habitability comparison61%
Potential candidate — not confirmed habitable
Probability of other life37%
Candidate for simple life
Distance modelApprox. 12.5 light-years

The listed value is the approximate present distance from Earth. Interstellar destinations move, but the difference is negligible compared with the enormous journey time at current spacecraft speeds.

One-way light time12.5 years

Minimum delay for information travelling at light speed.

Round-trip communication25 years

Approximate send-and-reply delay before processing time.

Real mission comparisonBeyond current mission capability

No spacecraft has travelled to this system

Host systemTeegarden's StarOpen the complete star-system information page →

Life potential

Could other life exist on Teegarden's Star b?

Teegarden's Star b is treated as a potentially habitable candidate, so this site assigns it a moderate editorial probability for simple non-human life.

Editorial probability of other life37%
Candidate for simple life

Why this score?

  • Rate the Earth habitability comparison score: 61%.
  • Atmosphere clue: Unknown.
  • Host-star context: M-type red dwarf.
  • The catalog flags this world as a potentially habitable candidate.

This probability is an editorial astrobiology estimate based on public characteristics, not a formal scientific measurement.

Complete data sheet

Everything listed for Teegarden's Star b

Measured values, estimates, discovery information and the main uncertainties are shown together below.

WorldTeegarden's Star b
ClassificationNearby rocky candidate
Host systemTeegarden's Star
Host starM-type red dwarf
Distance from EarthApprox. 12.5 light-years
RadiusAbout 1.05 × Earth (estimate)
MassAbout 1.16 × Earth
GravityLikely near Earth range
AtmosphereUnknown
TemperatureModel-dependent
Orbital period4.9 days
Discovery year2019
Discovery methodRadial velocity
Habitability statusPotential candidate — not confirmed habitable
Candidate classificationPotentially habitable candidate — not confirmed habitable
Image statusNo resolved surface image; displayed visual is a labelled artist concept
DistanceAbout 12.5 light-years
MassAbout 1.16 × Earth
Orbital periodAbout 4.9 days
Discovery2019

Travel calculation

How long would the journey take?

Straight-line arithmetic is compared with real mission history. Actual trajectories depend on orbital mechanics, acceleration, braking, launch windows and gravity assists.

At light speed12.5 years299,792 km/s

A physical reference only. A spacecraft with mass cannot reach light speed.

At 10% of light speed125 years29,979 km/s — hypothetical

No operational spacecraft can sustain this interstellar cruise speed.

At 1% of light speed1,250 years2,998 km/s — hypothetical

Still far beyond current spacecraft propulsion.

At Parker Solar Probe peak19,495 yearsAbout 692,000 km/h

Parker reaches this speed only very close to the Sun; it is not an interstellar cruise speed.

At New Horizons launch speed230,468 yearsAbout 58,536 km/h

A comparison using a real high-energy launch from Earth.

At Voyager 1 speed220,436 yearsAbout 61,200 km/h

A practical comparison with a spacecraft already moving into interstellar space.

Research guide

What we know, and what we do not know

What is directly known

The planet itself is not resolved as a detailed globe. Its existence and properties are inferred mainly through radial velocity, together with measurements of the host star.

What remains unknown

Surface geography, oceans, continents, clouds and living organisms have not been directly observed. Atmosphere and composition may also remain uncertain.

What is known

Teegarden's Star b was detected by radial velocity and has a minimum mass close to Earth's.

Habitability limits

Its atmosphere, rotation and surface conditions are not directly measured.

Why it stands out

It is nearby and compact, making it a strong target for future characterization.

Primary catalog source: NASA Science