Registry · exoplanet

L 98-59 b

Exoplanet 76 papers

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Right ascension: 08h 18m 07.89s
Declination: −68° 18′ 52.1″
Galactic l, b: 281.82, -17.59
Magnitude V: 11.69
Distance: 10.619 pc

Also known as

1 identifiers

L 98-59 b

Planet

NASA Exoplanet Archive, composite parameters

Host star	L 98-59 · M3V
Discovery	Transit, 2019 · Transiting Exoplanet Survey Satellite (TESS)
Orbital period	2.25311 d
Semi-major axis	0.0223 au
Eccentricity	0.031
Radius	0.837 R⊕ · 0.07467 R♃
Mass	0.46 M⊕ · 0.001447 M♃
Density	4.3 g/cm³
Equilibrium temperature	620 K
System distance	10.619 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 6 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.32	M_earth	± 0.12	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
0.45	M_earth	± 0.11	Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
0.46	M_earth	± 0.11	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
0.47	M_earth	± 0.13	Transit	NASA Exoplanet Archive	Rajpaul et al. 2024	2024
0.4	M_earth	± 0.16	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
1.01	M_earth		Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019

Radius 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.884	R_earth	± 0.025	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
0.83	R_earth	± 0.03	Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
0.837	R_earth	± 0.019	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
0.85	R_earth	± 0.061	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
0.826635	R_earth	± 0.3892	Transit	NASA Exoplanet Archive	ExoFOP	2019
0.8	R_earth	± 0.05	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
0.8	R_earth	± 0.05	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Orbital period 8 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.253114	d	± 1.70e-07	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
2.25	d		Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
2.253114	d	± 4.00e-07	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
2.253115	d	± 1.70e-06	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
2.253114	d	± 1.20e-06	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
2.253106	d	± 1.99e-06	Transit	NASA Exoplanet Archive	ExoFOP	2019
2.2531	d	± 0.0004	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
2.25314	d	± 2.00e-05	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Semi-major axis 5 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.02234	au	± 0.00049	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
0.0223	au	± 0.0007	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
0.02191	au	± 0.0008	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
0.02282	au	± 8.00e-05	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
0.0233	au	± 0.0017	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Eccentricity 7 values

Value	Uncertainty	Band / method	Source	Reference	Year
0.015	± 0.018	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
0.031	± 0.017	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
0.167	± 0.034	Transit	NASA Exoplanet Archive	Rajpaul et al. 2024	2024
0.103	± 0.117	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
0.103	± 0.117	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
0.12		Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
0.1	± 0.17	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Equilibrium temperature 6 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
617	K		Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
617	K	± 26	Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
620	K	± 13	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
627	K	± 33	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
567.3	K		Transit	NASA Exoplanet Archive	ExoFOP	2019
610	K	± 13	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
L 98-59 c	Exoplanet	0″	11.69
L 98-59 e	Exoplanet	0″	11.69
L 98-59 f	Exoplanet	0″	11.69
L 98-59 d	Exoplanet	0″	11.69
TIC 307210830e	Planet	5.472″	—
L 98-59	HighPM*	5.472″	11.69
TYC 9193-2451-1	SB*	359.7″	10.86
2MASS J08180386-6812140	LongPeriodV*	398.6″	12
TYC 9193-2077-1	SB*	429″	11.26
HD 70821	SB*	439.8″	8.41
HD 311289	SB*	501″	9.99

Provenance

where this card came from

Archive	Read at (UTC)	Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/l-98-59-b · Registry entry updated 2026-08-14.