UPSA Object Registry
Registry · exoplanet

TRAPPIST-1 e

Exoplanet 402 papers
harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.
Right ascension
23h 06m 30.33s
Declination
−05° 02′ 36.5″
Galactic l, b
69.715, -56.65
Magnitude V
17.02
Distance
12.43 pc

Also known as

1 identifiers

TRAPPIST-1e

Planet

NASA Exoplanet Archive, composite parameters
Host starTRAPPIST-1 · M7.5e
DiscoveryTransit, 2017 · Multiple Observatories
Orbital period6.10101 d
Semi-major axis0.02925 au
Eccentricity0.0051
Radius0.92 R⊕ · 0.08208 R♃
Mass0.692 M⊕ · 0.002177 M♃
Density4.902 g/cm³
Equilibrium temperature249.7 K
System distance12.43 pc

Published measurements

6 quantities measured more than once
One object can carry a dozen published estimates of the same quantity. The register keeps them side by side rather than picking a winner — the citation is part of the value.

Mass 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.692 M_earth ± 0.022 Transit NASA Exoplanet Archive Agol et al. 2021 2021
0.772 M_earth ± 0.079 Transit NASA Exoplanet Archive Grimm et al. 2018 2018
0.62 M_earth ± 0.58 Transit NASA Exoplanet Archive Gillon et al. 2017 2017

Radius 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.92 R_earth ± 0.013 Transit NASA Exoplanet Archive Agol et al. 2021 2021
0.91 R_earth ± 0.026 Transit NASA Exoplanet Archive Grimm et al. 2018 2018
0.918 R_earth ± 0.039 Transit NASA Exoplanet Archive Gillon et al. 2017 2017

Orbital period 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
6.101013 d ± 3.50e-05 Transit NASA Exoplanet Archive Agol et al. 2021 2021
6.09705 d ± 0.00096 Transit NASA Exoplanet Archive Hirano et al. 2020 2020
6.099565 d ± 1.78e-06 Transit NASA Exoplanet Archive Ducrot et al. 2020 2020
6.099615 d ± 1.10e-05 Transit NASA Exoplanet Archive Gillon et al. 2017 2017

Semi-major axis 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.02925 au ± 0.0025 Transit NASA Exoplanet Archive Agol et al. 2021 2021
0.02924 au ± 0.00025 Transit NASA Exoplanet Archive Ducrot et al. 2020 2020
0.02928285 au ± 3.40e-07 Transit NASA Exoplanet Archive Grimm et al. 2018 2018
0.02817 au ± 0.00083 Transit NASA Exoplanet Archive Gillon et al. 2017 2017

Eccentricity 2 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.0051 ± 0.00058 Transit NASA Exoplanet Archive Grimm et al. 2018 2018
0.085 Transit NASA Exoplanet Archive Gillon et al. 2017 2017

Equilibrium temperature 2 values

ValueUnitUncertainty Band / methodSourceReferenceYear
249.7 K ± 2.4 Transit NASA Exoplanet Archive Ducrot et al. 2020 2020
251.3 K ± 4.9 Transit NASA Exoplanet Archive Gillon et al. 2017 2017

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
TRAPPIST-1 b Exoplanet 0.003074″ 17.02
TRAPPIST-1 c Exoplanet 0.003074″ 17.02
TRAPPIST-1 d Exoplanet 0.003074″ 17.02
TRAPPIST-1 f Exoplanet 0.003074″ 17.02
TRAPPIST-1 g Exoplanet 0.003074″ 17.02
TRAPPIST-1 h Exoplanet 0.003074″ 17.02
TRAPPIST-1 Low-Mass* 16.23″ 18.8
4C -05.95 Blazar 280.4″ 19.5

Provenance

where this card came from
ArchiveRead at (UTC)Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/trappist-1-e · Registry entry updated 2026-08-14.