UPSA Object Registry
Registry · exoplanet

WASP-8 b

Exoplanet
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 59m 36.21s
Declination
−35° 01′ 52.8″
Galactic l, b
354.25, -76.4
Magnitude V
9.789
Distance
89.961 pc

Planet

NASA Exoplanet Archive, composite parameters
Host starWASP-8 · G8 V
DiscoveryTransit, 2010 · SuperWASP
Orbital period8.15872 d
Semi-major axis0.0801 au
Eccentricity0.31
Radius12.666 R⊕ · 1.13 R♃
Mass807.29 M⊕ · 2.54 M♃
Density2.1 g/cm³
Equilibrium temperature1,059 K
System distance89.961 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

ValueUnitUncertainty Band / methodSourceReferenceYear
696.0442 M_earth ± 19.07 Transit NASA Exoplanet Archive Borsato et al. 2021 2021
677.6136 M_earth ± 25.43 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
807.2882 M_earth ± 104.9 Transit NASA Exoplanet Archive Stassun et al. 2017 2017
699.2 M_earth Transit NASA Exoplanet Archive Salz et al. 2015 2015
711.9392 M_earth ± 34.96 Transit NASA Exoplanet Archive Knutson et al. 2014 2014
713.18 M_earth ± 25.11 Transit NASA Exoplanet Archive Queloz et al. 2010 2010

Radius 6 values

ValueUnitUncertainty Band / methodSourceReferenceYear
12.55406 R_earth ± 0.4484 Transit NASA Exoplanet Archive Borsato et al. 2021 2021
11.63494 R_earth ± 0.07846 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
12.66617 R_earth ± 0.5605 Transit NASA Exoplanet Archive Stassun et al. 2017 2017
11.2 R_earth Transit NASA Exoplanet Archive Salz et al. 2015 2015
11.635 R_earth ± 0.078 Transit NASA Exoplanet Archive Queloz et al. 2010 2010
12.7393 R_earth ± 0.7459 Transit NASA Exoplanet Archive ExoFOP 2010

Orbital period 11 values

ValueUnitUncertainty Band / methodSourceReferenceYear
8.158726 d ± 6.70e-07 Transit NASA Exoplanet Archive Yalçınkaya et al. 2024 2024
8.158727 d ± 7.80e-07 Transit NASA Exoplanet Archive Kokori et al. 2023 2023
8.158729 d ± 1.30e-06 Transit NASA Exoplanet Archive Ivshina & Winn 2022 2022
8.15872 d ± 1.00e-05 Transit NASA Exoplanet Archive Borsato et al. 2021 2021
8.158715 d ± 1.60e-05 Transit NASA Exoplanet Archive Bourrier et al. 2017 2017
8.158715 d ± 1.60e-05 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
8.15872 d ± 1.50e-05 Transit NASA Exoplanet Archive Stassun et al. 2017 2017
8.2 d Transit NASA Exoplanet Archive Salz et al. 2015 2015
8.158724 d ± 1.40e-05 Transit NASA Exoplanet Archive Knutson et al. 2014 2014
8.158715 d ± 1.60e-05 Transit NASA Exoplanet Archive Queloz et al. 2010 2010
8.158726 d ± 1.20e-06 Transit NASA Exoplanet Archive ExoFOP 2010

Semi-major axis 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.0801 au ± 0.0015 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
0.08 au Transit NASA Exoplanet Archive Salz et al. 2015 2015
0.0801 au ± 0.0014 Transit NASA Exoplanet Archive Queloz et al. 2010 2010

Eccentricity 8 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.31 ± 0.0029 Transit NASA Exoplanet Archive Kokori et al. 2023 2023
0.304 ± 0.004 Transit NASA Exoplanet Archive Borsato et al. 2021 2021
0.304 ± 0.004 Transit NASA Exoplanet Archive Bourrier et al. 2017 2017
0.3057 ± 0.0046 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
0.31 ± 0 Transit NASA Exoplanet Archive Stassun et al. 2017 2017
0.3 Transit NASA Exoplanet Archive Salz et al. 2015 2015
0.3044 ± 0.0039 Transit NASA Exoplanet Archive Knutson et al. 2014 2014
0.31 ± 0.0029 Transit NASA Exoplanet Archive Queloz et al. 2010 2010

Equilibrium temperature 2 values

ValueUnitUncertainty Band / methodSourceReferenceYear
950 K Transit NASA Exoplanet Archive Salz et al. 2015 2015
1,059 K Transit NASA Exoplanet Archive ExoFOP 2010

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
WASP-8 Star 0″ —
WASP-8 c Exoplanet 0″ 9.789
CD-35 16019 HighPM* 1.705″ 9.87
CD-35 16019c Planet 1.705″ —
CD-35 16019b Planet 1.705″ —
CD-35 16019B HighPM* 4.648″ —
HD 224664 HighPM* 140″ 9.03
LEDA 73193 Galaxy 241.4″ —
HD 224683 SB* 245.6″ 9.68
QSO B2357-3520 QSO 342.9″ 17.6
MCG-06-01-012 Galaxy 483.2″ —

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/wasp-8-b · Registry entry updated 2026-08-14.