HD 15337

HD 15337
Location of HD 15337 (circled)
Observation data
Epoch J2000.0[1]      Equinox J2000.0[1]
Constellation Fornax
Right ascension 02h 27m 28.37813s
Declination −27° 38′ 06.7368″
Apparent magnitude (V) 9.09[2]
Characteristics
Spectral type K1V[3]
B−V color index 0.86[4]
J−H color index 0.338[4]
J−K color index 0.509[4]
Astrometry
Radial velocity (Rv)−3.882[5] km/s
Proper motion (μ) RA: -73.581[1] mas/yr
Dec.: −211.935[1] mas/yr
Parallax (π)22.2922 ± 0.016 mas[1]
Distance146.3 ± 0.1 ly
(44.86 ± 0.03 pc)
Absolute magnitude (MV)5.56+0.05
−0.06[a]
Details[6]
Mass0.829±0.038 M☉
Radius0.855±0.008 R☉
Luminosity0.472+0.023
−0.024[7] L☉
Surface gravity (log g)4.37±0.08 cgs
Temperature5131±74 K
Metallicity [Fe/H]0.03±0.04 dex
Rotation36.55 d
Age9.6+3.8
−3.9 Gyr
Other designations
CD−28° 784, CPD−28° 228, Gaia DR3 5068777809824976256, HD 15337, HIP 11433, SAO 167802, PPM 245027, TOI-402, TIC 120896927, TYC 6435-434-1, 2MASS J02272838-2738064[4]
Database references
SIMBADdata

HD 15337 (TOI-402) is a star with two orbiting exoplanets in the southern constellation of Fornax. It has an apparent magnitude of 9.09, making it too faint to be observed by the naked eye from Earth, but readily visible using a small telescope.[8] It is located 146 light-years (45 parsecs) distant based on stellar parallax, and is currently heading towards the Solar System with a radial velocity of −3.9 km/s.

The star is about 15% smaller than the Sun in both mass and radius and radiates slightly less than half the Sun's luminosity from its photosphere. It has a spectral type of K1V and an effective temperature of 5,131 K (4,858 °C; 8,776 °F), giving the star an orange hue. It is 9.6+3.8
−3.9 billion years old, making it much older than the Solar System. The star has a solar-like metallicity and displays similar amounts of stellar activity to the Sun,[7] though when the star was only 150 million years old, it may have emitted between 3.7 and 127 times the high-energy luminosity of the Sun in the present day.[3]

  1. ^ a b c d Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference TYC2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gandolfi2019 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference simbad was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference DR2 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Rosario2024 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Dumusque2019 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Koed2003 was invoked but never defined (see the help page).


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