UPSA Object Registry
Registry · exoplanet

HD 168443 c

Exoplanet 97 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
18h 20m 03.84s
Declination
−09° 35′ 48.1″
Galactic l, b
20.814, 2.507
Magnitude V
6.921
Distance
39.624 pc

Also known as

1 identifiers

HD 168443c

Planet

NASA Exoplanet Archive, composite parameters
Host starHD 168443 · G6V
DiscoveryRadial Velocity, 2000 · W. M. Keck Observatory
Orbital period1,753.11 d
Semi-major axis2.842 au
Eccentricity0.21
Radius12.2 R⊕ · 1.09 R♃
Mass5,500.3 M⊕ · 17.31 M♃
Density16.6 g/cm³
Equilibrium temperature205.47 K
System distance39.624 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
6,515.482 M_earth ± 508.5 Radial Velocity NASA Exoplanet Archive An et al. 2025 2025
5,500.338 M_earth ± 810.5 Radial Velocity NASA Exoplanet Archive Feng et al. 2022 2022
5,644.633 M_earth ± 111.2 Radial Velocity NASA Exoplanet Archive Rosenthal et al. 2021 2021
5,464.221 M_earth ± 66.74 Radial Velocity NASA Exoplanet Archive Pilyavsky et al. 2011 2011
5,752.723 M_earth ± 476.7 Radial Velocity NASA Exoplanet Archive Wright et al. 2009 2009
5,752.5 M_earth ± 476.7 Radial Velocity NASA Exoplanet Archive Wright et al. 2007 2007
5,361.57 M_earth ± 203.4 Radial Velocity NASA Exoplanet Archive Wittenmyer et al. 2007 2007

Orbital period 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1,759.2 d ± 1.9 Radial Velocity NASA Exoplanet Archive An et al. 2025 2025
1,753.11 d ± 0.7715 Radial Velocity NASA Exoplanet Archive Feng et al. 2022 2022
1,749.67 d ± 0.28 Radial Velocity NASA Exoplanet Archive Rosenthal et al. 2021 2021
1,749.83 d ± 0.57 Radial Velocity NASA Exoplanet Archive Pilyavsky et al. 2011 2011
1,748.2 d ± 1 Radial Velocity NASA Exoplanet Archive Wright et al. 2009 2009
1,749.5 d ± 2.4 Radial Velocity NASA Exoplanet Archive Wright et al. 2007 2007
1,765.8 d ± 2.2 Radial Velocity NASA Exoplanet Archive Wittenmyer et al. 2007 2007

Semi-major axis 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
2.929 au ± 0.04 Radial Velocity NASA Exoplanet Archive An et al. 2025 2025
2.842 au ± 0.11 Radial Velocity NASA Exoplanet Archive Feng et al. 2022 2022
2.881 au ± 0.028 Radial Velocity NASA Exoplanet Archive Rosenthal et al. 2021 2021
2.8373 au ± 0.018 Radial Velocity NASA Exoplanet Archive Pilyavsky et al. 2011 2011
2.91 au ± 0.17 Radial Velocity NASA Exoplanet Archive Wright et al. 2009 2009
2.91 au ± 0.17 Radial Velocity NASA Exoplanet Archive Wright et al. 2007 2007
2.84 au ± 0.05 Radial Velocity NASA Exoplanet Archive Wittenmyer et al. 2007 2007

Eccentricity 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.2131 ± 0.0034 Radial Velocity NASA Exoplanet Archive An et al. 2025 2025
0.21 ± 0.002 Radial Velocity NASA Exoplanet Archive Feng et al. 2022 2022
0.2112 ± 0.0013 Radial Velocity NASA Exoplanet Archive Rosenthal et al. 2021 2021
0.2113 ± 0.00171 Radial Velocity NASA Exoplanet Archive Pilyavsky et al. 2011 2011
0.2122 ± 0.002 Radial Velocity NASA Exoplanet Archive Wright et al. 2009 2009
0.2125 ± 0.0015 Radial Velocity NASA Exoplanet Archive Wright et al. 2007 2007
0.222 ± 0.003 Radial Velocity NASA Exoplanet Archive Wittenmyer et al. 2007 2007

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
HD 168443 b Exoplanet 0″ 6.921
HD 168443 HighPM* 3.751″ 6.92
OGLE GD-LPV-17629 Mira 103.2″ —
OGLE GD-LPV-17624 Mira 161.1″ —
OGLE GD-LPV-17632 Mira 193.4″ —
LS IV -09 5 Star 318.4″ 11.35
ATO J275.0615-09.7094 RRLyrae 436.7″ —
OGLE GD-RRLYR-10550 RRLyrae 461″ —
UBC 573 OpenCluster 492.1″ —
OGLE GD-LPV-17653 Mira 508.7″ —

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-168443-c · Registry entry updated 2026-08-14.