UPSA Object Registry
Registry · deep sky

WASP-18

Star F6 IV-V
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
01h 37m 25.07s
Declination
−45° 40′ 40.1″
Galactic l, b
279.71, -69.32
Distance
123.48 pc

Published measurements

3 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 12 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1.245 M_sun ± 0.057 NASA Exoplanet Archive Deline et al. 2025 2025
1.294 M_sun ± 0.063 NASA Exoplanet Archive Cortés-Zuleta et al. 2020 2020
1.22 M_sun NASA Exoplanet Archive Pearson 2019 2019
1.2 M_sun ± 0.1805 NASA Exoplanet Archive TICv8 2019
1.46 M_sun ± 0.29 NASA Exoplanet Archive Shporer et al. 2019 2019
1.46 M_sun ± 0.29 NASA Exoplanet Archive Stassun et al. 2017 2017
1.25 M_sun ± 0.13 NASA Exoplanet Archive Bonomo et al. 2017 2017
1.28 M_sun ± 0.09 NASA Exoplanet Archive Knutson et al. 2014 2014
1.274 M_sun ± 0.06 NASA Exoplanet Archive Southworth 2012 2012
1.24 M_sun ± 0.04 NASA Exoplanet Archive Triaud et al. 2010 2010
1.256 M_sun ± 0.066 NASA Exoplanet Archive Southworth 2010 2010
1.281 M_sun ± 0.069 NASA Exoplanet Archive Southworth et al. 2009 2009

Radius 12 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1.2561 R_sun ± 0.0079 NASA Exoplanet Archive Deline et al. 2025 2025
1.319 R_sun ± 0.061 NASA Exoplanet Archive Cortés-Zuleta et al. 2020 2020
1.23 R_sun NASA Exoplanet Archive Pearson 2019 2019
1.34658 R_sun ± 0.06946 NASA Exoplanet Archive TICv8 2019
1.26 R_sun ± 0.04 NASA Exoplanet Archive Shporer et al. 2019 2019
1.29 R_sun ± 0.05 NASA Exoplanet Archive Stassun et al. 2017 2017
1.216 R_sun ± 0.067 NASA Exoplanet Archive Bonomo et al. 2017 2017
1.228 R_sun ± 0.043 NASA Exoplanet Archive Southworth 2012 2012
1.36 R_sun ± 0.055 NASA Exoplanet Archive Triaud et al. 2010 2010
1.222 R_sun ± 0.043 NASA Exoplanet Archive Southworth 2010 2010
1.35 R_sun ± 0.07 NASA Exoplanet Archive ExoFOP 2009
1.23 R_sun ± 0.047 NASA Exoplanet Archive Southworth et al. 2009 2009

Effective temperature 14 values

ValueUnitUncertainty Band / methodSourceReferenceYear
6,332 K ± 60 NASA Exoplanet Archive Deline et al. 2025 2025
6,432 K ± 48 NASA Exoplanet Archive Cortés-Zuleta et al. 2020 2020
6,400 K NASA Exoplanet Archive Pearson 2019 2019
6,226 K ± 162.2 NASA Exoplanet Archive TICv8 2019
6,431 K ± 48 NASA Exoplanet Archive Shporer et al. 2019 2019
6,431 K ± 48 NASA Exoplanet Archive Stassun et al. 2017 2017
6,400 K ± 100 NASA Exoplanet Archive Bonomo et al. 2017 2017
6,400 K NASA Exoplanet Archive Salz et al. 2015 2015
6,455 K ± 70 NASA Exoplanet Archive Southworth 2012 2012
6,400 K ± 100 NASA Exoplanet Archive Triaud et al. 2010 2010
6,400 K ± 100 NASA Exoplanet Archive Southworth 2010 2010
6,400 K NASA Exoplanet Archive ExoFOP 2009
Show the remaining 2
ValueUnitUncertainty Band / methodSourceReferenceYear
6,400 K ± 100 NASA Exoplanet Archive Hellier et al. 2009 2009
6,400 K ± 100 NASA Exoplanet Archive Southworth et al. 2009 2009

Related objects

ObjectTypeRelation
WASP-18 b Exoplanethost

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
WASP-18 b Exoplanet 0″ 9.28
HD 10069c Planet 0.5056″ —
HD 10069 SB* 0.5056″ 9.3
HD 10069b Planet 0.5056″ —
GALEX J013657.7-453533 WhiteDwarf 419.3″ —

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/wasp-18 · Registry entry updated 2026-08-14.