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HD 48948
Observation data; Epoch J2000 Equinox J2000
Constellation	Lynx
Right ascension	06h 49m 57.57s
Declination	+60° 20′ 14.53″
Apparent magnitude (V)	8.58
Characteristics
Evolutionary stage	Main sequence star
Spectral type	K3V
Apparent magnitude (J)	6.33±0.02
Apparent magnitude (H)	5.73±0.02
Apparent magnitude (K)	5.61±0.02
B−V color index	1.21
Astrometry
Radial velocity (Rv)	−52.061±0.0020 km/s
Proper motion (μ)	RA: 253.401±0.020 mas/yr ; Dec.: 410.798±0.017 mas/yr
Parallax (π)	59.393 ± 0.025 mas
Distance	54.91 ± 0.02 ly ; (16.837 ± 0.007 pc)
Absolute magnitude (MV)	7.46±0.05
Details
Mass	0.686+0.020; −0.013 M☉
Radius	0.679±0.004 R☉
Luminosity	0.156 L☉
Temperature	4593±60 K
Metallicity [Fe/H]	−0.21±0.03 dex
Rotation	43.45+1; −0.71 d
Rotational velocity (v sin i)	<2 km/s
Age	11.48+1.93; −4.67 Gyr
Other designations
	BD+60° 1003, Gaia DR3 1003351437484254464, HIP 32769, TYC 4097-1471-1, 2MASS J06495699+6020077
Database references
SIMBAD	data

HD 48948 is a K-type main-sequence star located in the constellation Lynx, approximately 55 light years away, based on a parallax of 59.393 mas. At an apparent magnitude of 8.58, it is too faint to be seen with the naked eye.^[2]

It has a stellar classification of K3V, which classifies it as a main sequence star (like our Sun) fusing atoms of hydrogen into helium at its core. Estimated to be 11.5 billion years old, HD 48948 has 0.68 times the mass and radius of the Sun. Its surface has an effective temperature of 4,593 K,^[2] giving it the orange glow of a K-type star.^[6]

Planetary system

In 2024, three planets were discovered orbiting HD 48948 via radial velocity using the HARPS-N spectrograph, with orbital periods of 7.3, 38 and 151 days, respectively,^[7] derived from 189 measurements over a 9.5-year period from 6 October 2013 to 16 April 2023. Of the three planets, the outermost planet, HD 48948 d, a super-Earth weighing 10.59±1.00 Earth masses, is located within the habitable zone.^[8] It is the nearest known super-Earth orbiting within the habitable zone of an F-, G- or K-type star, with the only other nearby examples being HIP 38594 b and HD 216520 c.^[2]

The HD 48948 planetary system^[2]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	>4.88±0.21 $M$ _🜨	0.0652±0.0005	7.34013±0.00040	0.078+0.058 −0.050	—	—
c	>7.27±0.70 $M$ _🜨	0.1951±0.0016	37.920+0.026 −0.024	0.22+0.10 −0.11	—	—
d	>10.59±1.00 $M$ _🜨	0.4894±0.0042	150.95+0.45 −0.41	0.12+0.12 −0.08	—	—