Registry · exoplanet

HAT-P-3 b

Exoplanet 115 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: 13h 44m 22.56s
Declination: +48° 01′ 42.8″
Galactic l, b: 100.17, 66.69
Magnitude V: 11.86
Distance: 134.55 pc

Also known as

1 identifiers

HAT-P-3b

Planet

NASA Exoplanet Archive, composite parameters

Host star	HAT-P-3 · K1V
Discovery	Transit, 2007 · HATNet
Orbital period	2.8997 d
Semi-major axis	0.03866 au
Eccentricity	0
Radius	10.536 R⊕ · 0.94 R♃
Mass	206.59 M⊕ · 0.65 M♃
Density	0.855 g/cm³
Equilibrium temperature	1,189 K
System distance	134.55 pc

Published measurements

6 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 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
187.8375	M_earth	± 8.899	Transit	NASA Exoplanet Archive	Ment et al. 2018	2018
189.1088	M_earth	± 7.628	Transit	NASA Exoplanet Archive	Mancini et al. 2018	2018
193.5585	M_earth	± 6.674	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
206.5895	M_earth	± 34.96	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
185.6127	M_earth	± 8.899	Transit	NASA Exoplanet Archive	Southworth 2012	2012
187.83	M_earth	± 5.721	Transit	NASA Exoplanet Archive	Chan et al. 2011	2011
190.3802	M_earth	± 8.264	Transit	NASA Exoplanet Archive	Gibson et al. 2010	2010
189.4267	M_earth	± 7.628	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
190.3802	M_earth	± 8.264	Transit	NASA Exoplanet Archive	Torres et al. 2007	2007

Radius 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
10.2114	R_earth	± 0.3811	Transit	NASA Exoplanet Archive	Mancini et al. 2018	2018
10.07689	R_earth	± 0.482	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
10.53646	R_earth	± 0.7846	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
10.61492	R_earth	± 0.3475	Transit	NASA Exoplanet Archive	Southworth 2012	2012
9.27	R_earth	± 0.616	Transit	NASA Exoplanet Archive	Chan et al. 2011	2011
9.97601	R_earth	± 0.2354	Transit	NASA Exoplanet Archive	Gibson et al. 2010	2010
10.07689	R_earth	± 0.482	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
10.0433	R_earth	± 0.5642	Transit	NASA Exoplanet Archive	ExoFOP	2007
9.97601	R_earth	± 0.5156	Transit	NASA Exoplanet Archive	Torres et al. 2007	2007

Orbital period 15 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.899738	d	± 1.30e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
2.899738	d	± 3.80e-07	Transit	NASA Exoplanet Archive	Bourrier et al. 2023	2023
2.899738	d	± 1.20e-07	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
2.899738	d	± 1.50e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2022	2022
2.899736	d		Transit	NASA Exoplanet Archive	Ment et al. 2018	2018
2.899738	d	± 2.70e-07	Transit	NASA Exoplanet Archive	Mancini et al. 2018	2018
2.899736	d	± 2.00e-06	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
2.8997	d	± 5.40e-05	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
2.899736	d	± 2.00e-06	Transit	NASA Exoplanet Archive	Southworth 2012	2012
2.899737	d	± 4.00e-06	Transit	NASA Exoplanet Archive	Nascimbeni et al. 2011	2011
2.899736	d	± 2.00e-06	Transit	NASA Exoplanet Archive	Chan et al. 2011	2011
2.899738	d	± 7.00e-06	Transit	NASA Exoplanet Archive	Gibson et al. 2010	2010

Show the remaining 3

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.899703	d		Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
2.899741	d	± 9.00e-07	Transit	NASA Exoplanet Archive	ExoFOP	2007
2.899703	d	± 5.40e-05	Transit	NASA Exoplanet Archive	Torres et al. 2007	2007

Semi-major axis 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.03871	au	± 0.00042	Transit	NASA Exoplanet Archive	Ment et al. 2018	2018
0.03878	au	± 0.00065	Transit	NASA Exoplanet Archive	Mancini et al. 2018	2018
0.03899	au	± 0.00062	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.03842	au	± 0.0008	Transit	NASA Exoplanet Archive	Southworth 2012	2012
0.03866	au	± 0.00041	Transit	NASA Exoplanet Archive	Chan et al. 2011	2011
0.03882	au	± 0.0006	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
0.03894	au	± 0.0007	Transit	NASA Exoplanet Archive	Torres et al. 2007	2007

Eccentricity 6 values

Value	Band / method	Source	Reference	Year
0	Transit	NASA Exoplanet Archive	Bourrier et al. 2023	2023
0	Transit	NASA Exoplanet Archive	Ment et al. 2018	2018
0.01	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
0	Transit	NASA Exoplanet Archive	Chan et al. 2011	2011
0	Transit	NASA Exoplanet Archive	Torres et al. 2007	2007

Equilibrium temperature 4 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1,170	K	± 17	Transit	NASA Exoplanet Archive	Mancini et al. 2018	2018
1,189	K	± 16	Transit	NASA Exoplanet Archive	Southworth 2012	2012
1,127	K	± 49	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
1,015	K		Transit	NASA Exoplanet Archive	ExoFOP	2007

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
HAT-P-3	EmLine*	0.4803″	11.86
SDSS J134413.73+480233.4	QSO	101.9″	—
SDSS J134436.86+480032.8	QSO	159.8″	—
2MASX J13441280+4759165	LINER	176.2″	—
SDSS J134439.35+480413.0	QSO	225.6″	—
SDSS J134419.96+480630.6	QSO	289″	—
SDSS J134453.35+480110.8	QSO	310.6″	—
6C 134149+481908	QSO	348.4″	—
2MASX J13441603+4754344	Seyfert1	434″	19.08
SDSS J134442.56+480843.9	QSO	466.3″	—
SDSS J134454.31+480816.4	QSO	506.2″	—

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/hat-p-3-b · Registry entry updated 2026-08-14.