Registry · deep sky

XO-2 S

Star G8 V

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
Distance: 151.4 pc

Published measurements

3 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 3 values

Value	Unit	Uncertainty	Source	Reference	Year
0.98	M_sun	± 0.05	NASA Exoplanet Archive	Ruggieri et al. 2024	2024
0.98	M_sun	± 0.2	NASA Exoplanet Archive	Stassun et al. 2017	2017
0.982	M_sun	± 0.054	NASA Exoplanet Archive	Desidera et al. 2014	2014

Radius 3 values

Value	Unit	Uncertainty	Source	Reference	Year
1.02	R_sun	± 0.09	NASA Exoplanet Archive	Ruggieri et al. 2024	2024
1	R_sun	± 0.04	NASA Exoplanet Archive	Stassun et al. 2017	2017
1.02	R_sun	± 0.09	NASA Exoplanet Archive	Desidera et al. 2014	2014

Effective temperature 3 values

Value	Unit	Uncertainty	Source	Reference	Year
5,325	K	± 37	NASA Exoplanet Archive	Ruggieri et al. 2024	2024
5,399	K	± 55	NASA Exoplanet Archive	Stassun et al. 2017	2017
5,399	K	± 55	NASA Exoplanet Archive	Desidera et al. 2014	2014

Related objects

Object	Type	Relation
XO-2 S b	Exoplanet	host
XO-2 S c	Exoplanet	host
XO-2 S d	Exoplanet	host

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 d	Exoplanet	0″	11.2
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 · Registry entry updated 2026-08-14.