UPSA Object Registry
Registry · exoplanet

K2-100 b

Exoplanet 85 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
08h 38m 24.26s
Declination
+20° 06′ 21.6″
Galactic l, b
205.24, 32.2
Magnitude V
10.65
Distance
188.96 pc

Also known as

1 identifiers

K2-100b

Planet

NASA Exoplanet Archive, composite parameters
Host starK2-100 · G2
DiscoveryTransit, 2016 · K2
Orbital period1.6739 d
Semi-major axis0.0301 au
Eccentricity0
Radius3.88 R⊕ · 0.3462 R♃
Mass21.8 M⊕ · 0.06859 M♃
Density2.04 g/cm³
Equilibrium temperature1,841 K
System distance188.96 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 2 values

ValueUnitUncertainty Band / methodSourceReferenceYear
8 M_earth ± 15 Transit NASA Exoplanet Archive Howard et al. 2025 2025
21.8 M_earth ± 6.2 Transit NASA Exoplanet Archive Barragán et al. 2019 2019

Radius 9 values

ValueUnitUncertainty Band / methodSourceReferenceYear
3.57 R_earth ± 0.1 Transit NASA Exoplanet Archive Howard et al. 2025 2025
3.88 R_earth ± 0.16 Transit NASA Exoplanet Archive Barragán et al. 2019 2019
1.52 R_earth ± 0.11 Transit NASA Exoplanet Archive Kruse et al. 2019 2019
3.45 R_earth ± 0.16 Transit NASA Exoplanet Archive Stefansson et al. 2018 2018
3.59 R_earth ± 0.14 Transit NASA Exoplanet Archive Livingston et al. 2018 2018
3.6 R_earth ± 0.4 Transit NASA Exoplanet Archive Petigura et al. 2018 2018
3.5 R_earth ± 0.2 Transit NASA Exoplanet Archive Mann et al. 2017 2017
4.67 R_earth Transit NASA Exoplanet Archive Libralato et al. 2016 2016
3.44449 R_earth ± 0.1893 Transit NASA Exoplanet Archive ExoFOP 2016

Orbital period 12 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1.67389 d ± 1.70e-05 Transit NASA Exoplanet Archive Howard et al. 2025 2025
1.673903 d ± 4.00e-07 Transit NASA Exoplanet Archive Barragán et al. 2019 2019
1.673737 d ± 2.80e-05 Transit NASA Exoplanet Archive Kruse et al. 2019 2019
1.673902 d ± 1.00e-06 Transit NASA Exoplanet Archive Stefansson et al. 2018 2018
1.673833 d ± 4.90e-05 Transit NASA Exoplanet Archive Livingston et al. 2018 2018
1.673847 d ± 5.50e-05 Transit NASA Exoplanet Archive Petigura et al. 2018 2018
1.673916 d ± 1.20e-05 Transit NASA Exoplanet Archive Mann et al. 2017 2017
1.6739 d Transit NASA Exoplanet Archive Rizzuto et al. 2017 2017
1.673442 d Transit NASA Exoplanet Archive Barros et al. 2016 2016
1.674 d Transit NASA Exoplanet Archive Pope et al. 2016 2016
1.673918 d ± 6.00e-05 Transit NASA Exoplanet Archive Libralato et al. 2016 2016
1.673903 d ± 7.00e-07 Transit NASA Exoplanet Archive ExoFOP 2016

Semi-major axis 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.0301 au ± 0.0014 Transit NASA Exoplanet Archive Barragán et al. 2019 2019
0.0422 au ± 0.0033 Transit NASA Exoplanet Archive Stefansson et al. 2018 2018
0.0296 au ± 0.0002 Transit NASA Exoplanet Archive Livingston et al. 2018 2018

Eccentricity 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0 Transit NASA Exoplanet Archive Barragán et al. 2019 2019
0 ± 0 Transit NASA Exoplanet Archive Stefansson et al. 2018 2018
0.24 ± 0.19 Transit NASA Exoplanet Archive Mann et al. 2017 2017

Equilibrium temperature 5 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1,720 K ± 44 Transit NASA Exoplanet Archive Howard et al. 2025 2025
1,841 K ± 41 Transit NASA Exoplanet Archive Barragán et al. 2019 2019
1,094 K ± 65 Transit NASA Exoplanet Archive Stefansson et al. 2018 2018
1,748 K ± 23 Transit NASA Exoplanet Archive Livingston et al. 2018 2018
1,461 K Transit NASA Exoplanet Archive ExoFOP 2016

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
K2-100 Star 0.5927″ 10.52
2MASS J08382186+2005356 BrownD* Candidate 56.86″ —
2MASS J08382150+2008145 Star 119.4″ —
Cl* NGC 2632 ART 83 Star 134.9″ —
Cl* NGC 2632 KW 105 Star 144.6″ —
Cl* NGC 2632 S 41 Star 163.8″ 11.22
2MASS J08381244+2008026 Star 194.4″ —
Cl* NGC 2632 KW 85 Star 210.4″ —
SDSS J083820.98+201004.5 QSO 227.6″ —
2MASS J08380586+2007221 BrownD* Candidate 266″ —
Cl* NGC 2632 HSHJ 195 Eruptive* 274.3″ —

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/k2-100-b · Registry entry updated 2026-08-14.