Registry · exoplanet

L 98-59 c

Exoplanet 96 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 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 c

Planet

NASA Exoplanet Archive, composite parameters

Host star	L 98-59 · M3V
Discovery	Transit, 2019 · Transiting Exoplanet Survey Satellite (TESS)
Orbital period	3.69068 d
Semi-major axis	0.0309 au
Eccentricity	0.002
Radius	1.329 R⊕ · 0.1186 R♃
Mass	2 M⊕ · 0.006293 M♃
Density	4.7 g/cm³
Equilibrium temperature	526 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 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1.98	M_earth	± 0.13	Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
2.22	M_earth	± 0.17	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
2	M_earth	± 0.13	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
2.25	M_earth	± 0.24	Transit	NASA Exoplanet Archive	Rajpaul et al. 2024	2024
2.42	M_earth	± 0.35	Transit	NASA Exoplanet Archive	Luque & Pallé 2022	2022
2.22	M_earth	± 0.26	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
2.42	M_earth	± 0.35	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019

Radius 8 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1.32	R_earth	± 0.04	Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
1.358	R_earth	± 0.04	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
1.329	R_earth	± 0.029	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
1.34	R_earth	± 0.07	Transit	NASA Exoplanet Archive	Luque & Pallé 2022	2022
1.385	R_earth	± 0.095	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
1.35	R_earth	± 0.07	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
1.36751	R_earth	± 0.0448	Transit	NASA Exoplanet Archive	ExoFOP	2019
1.35	R_earth	± 0.08	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Orbital period 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
3.69	d		Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
3.690574	d	± 4.00e-07	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
3.690676	d	± 4.00e-07	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
3.690672	d	± 1.50e-06	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
3.690675	d	± 2.50e-06	Transit	NASA Exoplanet Archive	Luque & Pallé 2022	2022
3.690678	d	± 1.60e-06	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
3.6904	d	± 0.0003	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
3.690676	d	± 1.01e-06	Transit	NASA Exoplanet Archive	ExoFOP	2019
3.690621	d	± 1.30e-05	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Semi-major axis 5 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.03104	au	± 0.00069	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
0.0309	au	± 0.001	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
0.0304	au	± 0.0011	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
0.0317	au	± 0.0001	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
0.0324	au	± 0.0023	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Eccentricity 8 values

Value	Uncertainty	Band / method	Source	Reference	Year
0.02	± 0.024	Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
0.002	± 0.002	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
0.049	± 0.015	Transit	NASA Exoplanet Archive	Rajpaul et al. 2024	2024
0.103	± 0.045	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
0		Transit	NASA Exoplanet Archive	Luque & Pallé 2022	2022
0.103	± 0.045	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
0.07		Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
0.09	± 0.16	Transit	NASA Exoplanet Archive	Kostov et al. 2019	2019

Equilibrium temperature 6 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
524	K	± 22	Transit	NASA Exoplanet Archive	Weisserman et al. 2026	2026
524	K		Transit	NASA Exoplanet Archive	Schwarz et al. 2026	2026
526	K	± 11	Transit	NASA Exoplanet Archive	Cadieux et al. 2025	2025
553	K	± 27	Transit	NASA Exoplanet Archive	Demangeon et al. 2021	2021
517	K	± 11	Transit	NASA Exoplanet Archive	Cloutier et al. 2019	2019
479	K		Transit	NASA Exoplanet Archive	ExoFOP	2019

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
L 98-59 e	Exoplanet	0″	11.69
L 98-59 f	Exoplanet	0″	11.69
L 98-59 b	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-c · Registry entry updated 2026-08-14.