Registry · deep sky

HD 18742

Star SIMBAD * G8/K0IV 53 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: 03h 00m 10.66s
Declination: −20° 48′ 09.4″
Galactic l, b: 207.8, -60
Magnitude V: 7.81
Parallax: 6.1858 mas
Redshift z: -4.500e-05
Radial velocity: -13.49 km/s
Proper motion: -19.6, -22.67 mas/yr

Also known as

20 identifiers

2MASS J03001065-2048091BD-21 533CPD-21 295Gaia DR1 5079636964618154112Gaia DR2 5079636934554540160Gaia DR3 5079636934554540160GEN# +1.00018742GSC 05870-00602HD 18742HIC 13993HIP 13993NAME-IAU AyeyarwadyPPM 245676SAO 168212SKY# 4512SPOCS 2571TIC 71345433TYC 5870-602-1uvby98 100018742YZ 110 810

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
1.36	M_sun		NASA Exoplanet Archive	Luhn et al. 2019	2019
2.58	M_sun	± 0.24	NASA Exoplanet Archive	Stassun et al. 2017	2017
1.6	M_sun	± 0.11	NASA Exoplanet Archive	Johnson et al. 2011	2011

Radius 3 values

Value	Unit	Uncertainty	Source	Reference	Year
5.13	R_sun		NASA Exoplanet Archive	Luhn et al. 2019	2019
5.88	R_sun	± 0.23	NASA Exoplanet Archive	Stassun et al. 2017	2017
4.9	R_sun	± 0.1	NASA Exoplanet Archive	Johnson et al. 2011	2011

Effective temperature 3 values

Value	Unit	Uncertainty	Source	Reference	Year
4,940	K		NASA Exoplanet Archive	Luhn et al. 2019	2019
5,021	K	± 14	NASA Exoplanet Archive	Stassun et al. 2017	2017
5,048	K	± 44	NASA Exoplanet Archive	Johnson et al. 2011	2011

Related objects

Object	Type	Relation
HD 18742 b	Exoplanet	host

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
HD 18742 b	Exoplanet	0.4646″	7.81
HE 0257-2104	WhiteDwarf	377.4″	—

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-18742-627980 · Registry entry updated 2026-08-14.