Registry · exoplanet

HD 38529 b

Exoplanet 91 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 46m 34.83s
Declination: +01° 10′ 03.3″
Galactic l, b: 204.32, -13.84
Magnitude V: 5.928
Distance: 42.354 pc

Also known as

1 identifiers

HD 38529b

Planet

NASA Exoplanet Archive, composite parameters

Host star	HD 38529 · G8III/IV
Discovery	Radial Velocity, 2000 · Multiple Observatories
Orbital period	14.3099 d
Semi-major axis	0.115 au
Eccentricity	0.256
Radius	14.1 R⊕ · 1.25 R♃
Mass	206.59 M⊕ · 0.65 M♃
Density	0.405 g/cm³
Equilibrium temperature	1,369.5 K
System distance	42.354 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

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
206.5885	M_earth	± 17.16	Radial Velocity	NASA Exoplanet Archive	Feng et al. 2022	2022
278.4177	M_earth	± 4.45	Radial Velocity	NASA Exoplanet Archive	Rosenthal et al. 2021	2021
253.3105	M_earth	± 4.767	Radial Velocity	NASA Exoplanet Archive	Luhn et al. 2019	2019
272.0625	M_earth	± 22.88	Radial Velocity	NASA Exoplanet Archive	Wright et al. 2009	2009
266.6481	M_earth	± 9.534	Radial Velocity	NASA Exoplanet Archive	Wittenmyer et al. 2009	2009
270.8	M_earth	± 23.5	Radial Velocity	NASA Exoplanet Archive	Butler et al. 2006	2006
244.7291	M_earth		Radial Velocity	NASA Exoplanet Archive	Fischer et al. 2001	2001

Orbital period 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
14.3099	d	± 0.00013	Radial Velocity	NASA Exoplanet Archive	Feng et al. 2022	2022
14.31014	d	± 0.00023	Radial Velocity	NASA Exoplanet Archive	Rosenthal et al. 2021	2021
14.30944	d	± 0.0003	Radial Velocity	NASA Exoplanet Archive	Luhn et al. 2019	2019
14.3102	d	± 0.00081	Radial Velocity	NASA Exoplanet Archive	Wright et al. 2009	2009
14.3098	d	± 0.0005	Radial Velocity	NASA Exoplanet Archive	Wittenmyer et al. 2009	2009
14.3093	d	± 0.0013	Radial Velocity	NASA Exoplanet Archive	Butler et al. 2006	2006
14.32	d	± 0.8	Radial Velocity	NASA Exoplanet Archive	Fischer et al. 2001	2001

Semi-major axis 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.115	au	± 0.005	Radial Velocity	NASA Exoplanet Archive	Feng et al. 2022	2022
0.1329	au	± 0.00034	Radial Velocity	NASA Exoplanet Archive	Rosenthal et al. 2021	2021
0.1294	au	± 0.0058	Radial Velocity	NASA Exoplanet Archive	Luhn et al. 2019	2019
0.1313	au	± 0.0076	Radial Velocity	NASA Exoplanet Archive	Wright et al. 2009	2009
0.131	au	± 0.002	Radial Velocity	NASA Exoplanet Archive	Wittenmyer et al. 2009	2009
0.1313	au	± 0.0076	Radial Velocity	NASA Exoplanet Archive	Butler et al. 2006	2006
0.13	au		Radial Velocity	NASA Exoplanet Archive	Fischer et al. 2001	2001

Eccentricity 7 values

Value	Uncertainty	Band / method	Source	Reference	Year
0.256	± 0.009	Radial Velocity	NASA Exoplanet Archive	Feng et al. 2022	2022
0.26	± 0.014	Radial Velocity	NASA Exoplanet Archive	Rosenthal et al. 2021	2021
0.28	± 0.017	Radial Velocity	NASA Exoplanet Archive	Luhn et al. 2019	2019
0.244	± 0.028	Radial Velocity	NASA Exoplanet Archive	Wright et al. 2009	2009
0.257	± 0.015	Radial Velocity	NASA Exoplanet Archive	Wittenmyer et al. 2009	2009
0.248	± 0.023	Radial Velocity	NASA Exoplanet Archive	Butler et al. 2006	2006
0.27	± 0.03	Radial Velocity	NASA Exoplanet Archive	Fischer et al. 2001	2001

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
HD 38529 c	Exoplanet	0″	5.928
HD 38529	HighPM*	2.501″	—
UCAC2 32153128	Star	130.1″	—
2MASS J05464411+0106148	Star	267.5″	—
HD 38529B	HighPM*	283.9″	—
UCAC4 457-012392	HighPM*	292.2″	12.14
2MASS J05460691+0108169	Star	432″	—
2MASS J05470345+0112585	Star	463.6″	—
2MASS J05470702+0107147	Star	511.5″	—
2MASS J05470145+0115508	Star	529.2″	—

Provenance

where this card came from

Archive	Read at (UTC)	Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/hd-38529-b · Registry entry updated 2026-08-14.