Registry · exoplanet

XO-2 S d

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: 07h 48m 07.43s
Declination: +50° 13′ 00.9″
Galactic l, b: 168.3, 29.33
Magnitude V: 11.2
Distance: 151.4 pc

Planet

NASA Exoplanet Archive, composite parameters

Host star	XO-2 S · G8 V
Discovery	Radial Velocity, 2024 · Multiple Observatories
Orbital period	4,696 d
Semi-major axis	5.46 au
Eccentricity	0.091
Radius	13 R⊕ · 1.16 R♃
Mass	1,179.1 M⊕ · 3.71 M♃
Density	2.95 g/cm³
Equilibrium temperature	110.98 K
System distance	151.4 pc

Recorded parameters

4 quantities with a single published value

Parameter	Value	Unit	Uncertainty	As published	Source	Reference
Mass	1,179.143	M_earth	± 381.4	Radial Velocity	NASA Exoplanet Archive	Ruggieri et al. 2024
Orbital period	4,696	d	± 1,133	Radial Velocity	NASA Exoplanet Archive	Ruggieri et al. 2024
Semi-major axis	5.46	au	± 0.85	Radial Velocity	NASA Exoplanet Archive	Ruggieri et al. 2024
Eccentricity	0.091		± 0.028	Radial Velocity	NASA Exoplanet Archive	Ruggieri et al. 2024

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
XO-2 S b	Exoplanet	0″	11.2
XO-2 S c	Exoplanet	0″	11.2
XO-2 S	Star	0″	—
BD+50 1471Bb	Planet	2.434″	—
BD+50 1471Bc	Planet	2.434″	—
BD+50 1471B	HighPM*	2.434″	11.09
XO-2 N	Star	31.21″	—
XO-2 N b	Exoplanet	31.21″	11.25
BD+50 1471	HighPM*	33.36″	11.14
BD+50 1471b	Planet	33.36″	—
HD 233451	Star	145.5″	10.19

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/xo-2-s-d · Registry entry updated 2026-08-14.