Registry · deep sky

HD 187123

HighPM* SIMBAD PM* G2V 267 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: 19h 46m 58.11s
Declination: +34° 25′ 10.3″
Galactic l, b: 69.466, 4.68
Parallax: 21.717 mas
Redshift z: -5.686e-05
Radial velocity: -17.046 km/s
Proper motion: 142.6, -123.7 mas/yr

Also known as

24 identifiers

2MASS J19465809+3425105AG+34 1917ASCC 616549BD+34 3708Gaia DR2 2047452661412980736Gaia DR3 2047452661412980736GEN# +1.00187123GSC 02664-00550HD 187123HIC 97336HIP 97336LSPM J1946+3425LTT 15779NLTT 48240PPM 83540** RBR 20SAO 68845SKY# 36980SPOCS 856TIC 58559140TYC 2664-550-1UCAC2 43839451uvby98 100187123USNO-B1.0 1244-00356837

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 5 values

Value	Unit	Uncertainty	Source	Reference	Year
1.192	M_sun	± 0.057	NASA Exoplanet Archive	An et al. 2025	2025
1.020234	M_sun	± 0.04796	NASA Exoplanet Archive	Rosenthal et al. 2021	2021
1.037	M_sun	± 0.026	NASA Exoplanet Archive	Bryan et al. 2016	2016
1.04	M_sun	± 0.1121	NASA Exoplanet Archive	TICv8	2009
1	M_sun	± 0.1	NASA Exoplanet Archive	Butler et al. 1998	1998

Radius 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1.154992	R_sun	± 0.02718		NASA Exoplanet Archive	Rosenthal et al. 2021	2021
1.15043	R_sun	± 0.05504		NASA Exoplanet Archive	TICv8	2009

Effective temperature 3 values

Value	Unit	Uncertainty	Source	Reference	Year
5,765.94	K	± 96.26	NASA Exoplanet Archive	Rosenthal et al. 2021	2021
5,790	K	± 157.7	NASA Exoplanet Archive	TICv8	2009
5,830	K	± 40	NASA Exoplanet Archive	Butler et al. 1998	1998

Related objects

Object	Type	Relation
HD 187123 b	Exoplanet	host
HD 187123 c	Exoplanet	host

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
HD 187123 c	Exoplanet	2.926″	7.83
HD 187123 b	Exoplanet	2.926″	7.83
V* V2217 Cyg	Mira	100.6″	—
ATO J296.6514+34.3592	LongPeriodV*	346.1″	—
ATO J296.6738+34.5489	EclBin	508″	15.53

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-187123-2903649 · Registry entry updated 2026-08-14.