HD 17925

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HD 17925
Observation data
Epoch J2000      Equinox J2000
Constellation Eridanus
Right ascension 02h 52m 32.12836s[1]
Declination –12° 46′ 10.9692″[1]
Apparent magnitude (V) 6.04[2]
Characteristics
Spectral type K1V[3]
U−B color index +0.55[2]
B−V color index +0.87[2]
Variable type BY Dra[4]
Astrometry
Radial velocity (Rv) +17.77±0.08[5] km/s
Proper motion (μ) RA: 397.41±0.45[1] mas/yr
Dec.: −189.32±0.36[1] mas/yr
Parallax (π) 96.60 ± 0.40[1] mas
Distance 33.8 ± 0.1 ly
(10.35 ± 0.04 pc)
Absolute magnitude (MV) 6.04
Details
Temperature 5225 ± 5.0[6] K
Metallicity [Fe/H] +0.10[7] dex
Rotation 6.6 days[7]
Rotational velocity (v sin i) 4.80[8] km/s
Age 100[9] Myr
Other designations
32 G. Eridani, EP Eri, BD-13°544, GJ 117, HIP 13402, HR 857, SAO 148647, YPC 599.

HD 17925 (32 G. Eridani) is a solitary K-type main sequence star located 34 light-years away, in the constellation Eridanus. It is a likely member of the Local Association of nearby, co-moving stars.[7] The spectrum shows a strong abundance of lithium, indicating that it is young star. This likely makes its point of origin the nearby Scorpio–Centaurus Complex.[10] It is a BY Draconis variable showing a rotational modulation with a period of 1.75 days, and has been observed to flare.[4]

An infrared excess has been detected around this star, most likely indicating the presence of a circumstellar disk at a radius of 17.9 AU. The temperature of this dust is 52 K.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
  2. ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 7.2 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links


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