UPSA Object Registry
Registry · exoplanet

HD 160691 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
17h 44m 08.68s
Declination
−51° 50′ 05.6″
Galactic l, b
340.06, -11.5
Magnitude V
5.12
Distance
15.598 pc

Planet

NASA Exoplanet Archive, composite parameters
Host starHD 160691 · G3 IV-V
DiscoveryRadial Velocity, 2000 · Anglo-Australian Telescope
Orbital period645 d
Semi-major axis1.5 au
Eccentricity0.0505
Radius— R⊕
Mass1,366.7 M⊕ · 4.3 M♃
Density— g/cm³
Equilibrium temperature262.13 K
System distance15.598 pc

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 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
556 M_earth ± 21 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
1,366.662 M_earth Radial Velocity NASA Exoplanet Archive Benedict et al. 2022 2022
532.6831 M_earth Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
532.978 M_earth Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
530.75 M_earth ± 34.96 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004
540.311 M_earth ± 63.57 Radial Velocity NASA Exoplanet Archive Jones et al. 2002 2002
626.1251 M_earth ± 44.5 Radial Velocity NASA Exoplanet Archive Butler et al. 2001 2001

Orbital period 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
644.93 d ± 0.27 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
645 d ± 0.3 Radial Velocity NASA Exoplanet Archive Benedict et al. 2022 2022
643.25 d ± 0.9 Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
646.485 d ± 1.5 Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
645.5 d ± 3 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004
637 d ± 8 Radial Velocity NASA Exoplanet Archive Jones et al. 2002 2002
743 d ± 10 Radial Velocity NASA Exoplanet Archive Butler et al. 2001 2001

Semi-major axis 6 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1.57 au ± 0.029 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
1.497 au Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
1.535 au Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
1.5 au ± 0.02 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004
1.5 au ± 0.1 Radial Velocity NASA Exoplanet Archive Jones et al. 2002 2002
1.65 au ± 0.12 Radial Velocity NASA Exoplanet Archive Butler et al. 2001 2001

Eccentricity 6 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.0505 ± 0.0094 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
0.128 ± 0.017 Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
0.0001 ± 0.05 Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
0.2 ± 0.03 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004
0.31 ± 0.08 Radial Velocity NASA Exoplanet Archive Jones et al. 2002 2002
0.62 ± 0.05 Radial Velocity NASA Exoplanet Archive Butler et al. 2001 2001

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
HD 160691 e Exoplanet 0″ 5.12
HD 160691 d Exoplanet 0″ 5.12
HD 160691 c Exoplanet 0″ 5.12
HD 160691 Star 0″ —
* mu. Ara e Planet 2.968″ —
* mu. Ara b Planet 2.968″ —
* mu. Ara c Planet 2.968″ —
* mu. Ara d Planet 2.968″ —
* mu. Ara HighPM* 2.968″ 5.15
UCAC4 191-181872 Star 223.8″ 15.12
UCAC4 191-181899 Star 235″ 14.56

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-160691-b · Registry entry updated 2026-08-14.