HD 18742

HD 18742 / Ayeyarwady
	Location of HD 18742 (circled)
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Eridanus
Right ascension	03h 00m 10.65643s
Declination	−20° 48′ 09.3773″
Apparent magnitude (V)	7.81
Characteristics
Spectral type	G8/K0IV
B−V color index	0.93
J−H color index	0.472
J−K color index	0.623
Astrometry
Radial velocity (Rv)	−13.29 km/s
Proper motion (μ)	RA: -19.599 mas/yr ; Dec.: −22.666 mas/yr
Parallax (π)	6.1858 ± 0.0248 mas
Distance	527 ± 2 ly ; (161.7 ± 0.6 pc)
Details
Mass	1.36, 1.73±0.19 M☉
Radius	5.13 R☉
Luminosity	13.18+5.44; −3.85, 20.66±0.46 L☉
Surface gravity (log g)	3.09 cgs
Temperature	4940 K
Metallicity [Fe/H]	-0.14 dex
Rotational velocity (v sin i)	1.72±0.23, 2.98±0.50 km/s
Age	2.49±0.58 Gyr
Other designations
	BD−21° 533, CPD−21° 295, Gaia DR1 5079636964618154112, Gaia DR2 5079636934554540160, HD 18742, HIP 13993, SAO 168212, PPM 245676, TIC 71345433, TYC 5870-602-1, GSC 05870-00602, 2MASS J03001065-2048091
Database references
SIMBAD	data

HD 18742 (proper name Ayeyarwady) is a 8th-magnitude subgiant star located about 530 light-years (160 pc) away in the constellation of Eridanus. It is orbited by one confirmed exoplanet, super-Jupiter HD 18742 b (proper name Bagan), and possibly by another Jovian planetary candidate (HD 18742 c).

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^ ^a ^b ^c Cite error: The named reference Jofre2015 was invoked but never defined (see the help page).
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^ Cite error: The named reference Stassun2017 was invoked but never defined (see the help page).
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[Houk99-2] Cite error: The named reference Houk99 was invoked but never defined (see the help page).

[luhn19-3] Cite error: The named reference luhn19 was invoked but never defined (see the help page).

[Mortier2013-4] Cite error: The named reference Mortier2013 was invoked but never defined (see the help page).

[Jofre2015-5] Cite error: The named reference Jofre2015 was invoked but never defined (see the help page).

[DR2-6] Cite error: The named reference DR2 was invoked but never defined (see the help page).

[Stassun2017-7] Cite error: The named reference Stassun2017 was invoked but never defined (see the help page).

[johnson11-8] Cite error: The named reference johnson11 was invoked but never defined (see the help page).

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Observation data Epoch J2000.0^[1] Equinox J2000.0^[1]
Location of HD 18742 (circled)
Constellation	Eridanus
Right ascension	03^h 00^m 10.65643^s^[1]
Declination	−20° 48′ 09.3773″^[1]
Apparent magnitude (V)	7.81^[1]
Characteristics
Spectral type	G8/K0IV^[2]
B−V color index	0.93^[1]
J−H color index	0.472^[1]
J−K color index	0.623^[1]
Astrometry

Radial velocity (R_v)	−13.29^[1] km/s
Proper motion (μ)	RA: -19.599^[1] mas/yr Dec.: −22.666^[1] mas/yr
Parallax (π)	6.1858 ± 0.0248 mas^[1]
Distance	527 ± 2 ly (161.7 ± 0.6 pc)

Details^[3]

Mass	1.36,^[3] 1.73±0.19^[4] `M`_☉
Radius	5.13 `R`_☉
Luminosity	13.18+5.44 −3.85,^[5] 20.66±0.46^[6] `L`_☉
Surface gravity (log g)	3.09 cgs
Temperature	4940 K
Metallicity [Fe/H]	-0.14^[7] dex
Rotational velocity (v sin i)	1.72±0.23^[5], 2.98±0.50^[8] km/s
Age	2.49±0.58^[5] Gyr

Other designations
BD−21° 533, CPD−21° 295, Gaia DR1 5079636964618154112, Gaia DR2 5079636934554540160, HD 18742, HIP 13993, SAO 168212, PPM 245676, TIC 71345433, TYC 5870-602-1, GSC 05870-00602, 2MASS J03001065-2048091^[1]
Database references
SIMBAD	data

HD 18742

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