UPSA Object Registry
Registry · exoplanet

HD 160691 c

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, 2004 · Anglo-Australian Telescope
Orbital period3,947 d
Semi-major axis4.17 au
Eccentricity0.039
Radius— R⊕
Mass1,398.4 M⊕ · 4.4 M♃
Density— g/cm³
Equilibrium temperature157.21 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 5 values

ValueUnitUncertainty Band / methodSourceReferenceYear
719 M_earth ± 63 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
1,398.445 M_earth Radial Velocity NASA Exoplanet Archive Benedict et al. 2022 2022
576.519 M_earth Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
770.07 M_earth Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
985.23 M_earth ± 225.7 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004

Orbital period 5 values

ValueUnitUncertainty Band / methodSourceReferenceYear
4,241 d ± 160 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
3,947 d ± 23 Radial Velocity NASA Exoplanet Archive Benedict et al. 2022 2022
4,205.8 d ± 758.9 Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
4,472.967 d ± 1,300 Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
2,986 d ± 30 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004

Semi-major axis 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
5.52 au ± 0.17 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
5.235 au Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
5.543 au Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
4.17 au ± 0.07 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004

Eccentricity 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.039 ± 0.011 Radial Velocity NASA Exoplanet Archive Harada et al. 2025 2025
0.0985 ± 0.0627 Radial Velocity NASA Exoplanet Archive Pepe et al. 2007 2007
0.027 ± 0.12 Radial Velocity NASA Exoplanet Archive Gozdziewski et al. 2007 2007
0.57 ± 0.1 Radial Velocity NASA Exoplanet Archive McCarthy et al. 2004 2004

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