UPSA Object Registry
Registry · exoplanet

HD 40307 b

Exoplanet 58 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
05h 54m 04.13s
Declination
−60° 01′ 25.4″
Galactic l, b
268.81, -30.34
Magnitude V
7.17
Distance
12.936 pc

Also known as

1 identifiers

HD 40307b

Planet

NASA Exoplanet Archive, composite parameters
Host starHD 40307 · K2.5V
DiscoveryRadial Velocity, 2009 · La Silla Observatory
Orbital period4.3123 d
Semi-major axis0.0468 au
Eccentricity0.2
Radius— R⊕
Mass1,189 M⊕ · 3.741 M♃
Density— g/cm³
Equilibrium temperature910 K
System distance12.936 pc

Recorded parameters

1 quantity with a single published value
ParameterValueUnitUncertainty As publishedSourceReference
Equilibrium temperature 910 K ± 1,217 Radial Velocity NASA Exoplanet Archive Brasser et al. 2014

Published measurements

4 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 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1,188.996 M_earth Radial Velocity NASA Exoplanet Archive Kiefer et al. 2021 2021
3.81 M_earth ± 0.3 Radial Velocity NASA Exoplanet Archive Díaz et al. 2016 2016
4 M_earth ± 0.8 Radial Velocity NASA Exoplanet Archive Brasser et al. 2014 2014
4 M_earth ± 0.8 Radial Velocity NASA Exoplanet Archive Tuomi et al. 2013 2013

Orbital period 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
4.311 d Radial Velocity NASA Exoplanet Archive Kiefer et al. 2021 2021
4.3115 d ± 0.00027 Radial Velocity NASA Exoplanet Archive Díaz et al. 2016 2016
4.3123 d ± 0.0003917 Radial Velocity NASA Exoplanet Archive Brasser et al. 2014 2014
4.3123 d ± 0.0011 Radial Velocity NASA Exoplanet Archive Tuomi et al. 2013 2013

Semi-major axis 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.0475 au ± 0.0011 Radial Velocity NASA Exoplanet Archive Díaz et al. 2016 2016
0.047524 au ± 3.00e-06 Radial Velocity NASA Exoplanet Archive Brasser et al. 2014 2014
0.0468 au ± 0.0024 Radial Velocity NASA Exoplanet Archive Tuomi et al. 2013 2013

Eccentricity 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.168 Radial Velocity NASA Exoplanet Archive Díaz et al. 2016 2016
0.1964 ± 0.05419 Radial Velocity NASA Exoplanet Archive Brasser et al. 2014 2014
0.2 ± 0.14 Radial Velocity NASA Exoplanet Archive Tuomi et al. 2013 2013

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
HD 40307 c Exoplanet 0″ 7.17
HD 40307 g Exoplanet 0″ 7.17
HD 40307 f Exoplanet 0″ 7.17
HD 40307 d Exoplanet 0″ 7.17
HD 40307 HighPM* 1.233″ 7.147
HD 40307e Planet 1.233″ —
HD 40275 Star 246.5″ 9.15
UCAC4 150-006593 Star 302.1″ 11.84
TYC 8892-624-1 Star 323.8″ 10.44
2MASX J05545691-6000478 Galaxy 397.9″ 12

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/hd-40307-b · Registry entry updated 2026-08-14.