HD 17925

HD 17925
Observation data; Epoch J2000 Equinox J2000
Constellation	Eridanus
Right ascension	02h 52m 32.13s
Declination	–12° 46′ 11.0″
Apparent magnitude (V)	6.04
Characteristics
Spectral type	K1 V
U−B color index	0.57
B−V color index	0.86
V−R color index	0.48
R−I color index	0.41
Variable type	None
Astrometry
Radial velocity (Rv)	+18.4 km/s
Proper motion (μ)	RA: 397.41 ± 0.45 mas/yr ; Dec.: -189.32 ± 0.36 mas/yr
Parallax (π)	96.60 ± 0.40 mas
Distance	33.8 ± 0.1 ly ; (10.35 ± 0.04 pc)
Absolute magnitude (MV)	6.04
Details
Temperature	5225 ± 5.0 K
Metallicity [Fe/H]	+0.10 dex
Rotation	6.6 days
Age	100 Myr
Other designations
	32 G. Eridani, GJ 117, BD-13°544, HR 857, HIP 13402, YPC 599

HD 17925 (32 G. Eridani) is a solitary K-type main sequence star located thirty-four light-years away, in the constellation Eridanus. It is a likely member of the Local Association of nearby, co-moving stars.^[3]

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.^[5]

References

^ ^a ^b ^c ^d ^e van Leeuwen, F. (2007), "HIP 13402", Hipparcos, the New Reduction, retrieved 2009-12-11
^ Kovtyukh; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378 {{citation}}: Explicit use of et al. in: |author= (help)
^ ^a ^b ^c Maldonado, J.; et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics, 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948
^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", The Astrophysical Journal, 687 (2): 1264–1293, arXiv:0807.1686, Bibcode:2008ApJ...687.1264M, doi:10.1086/591785
^ Eiroa, C.; et al. (July 2013). "DUst around NEarby Stars. The survey observational results". Astronomy & Astrophysics. 555: A11. arXiv:1305.0155. Bibcode:2013A&A...555A..11E. doi:10.1051/0004-6361/201321050.

External links

ARICNS: 00255

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[hipparcos-1] van Leeuwen, F. (2007), "HIP 13402", Hipparcos, the New Reduction, retrieved 2009-12-11

[aaa411_3_559-2] Kovtyukh; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378 {{citation}}: Explicit use of et al. in: |author= (help)

[aaa521_A12-3] Maldonado, J.; et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics, 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948

[apj687-4] Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", The Astrophysical Journal, 687 (2): 1264–1293, arXiv:0807.1686, Bibcode:2008ApJ...687.1264M, doi:10.1086/591785

[aa555_A11-5] Eiroa, C.; et al. (July 2013). "DUst around NEarby Stars. The survey observational results". Astronomy & Astrophysics. 555: A11. arXiv:1305.0155. Bibcode:2013A&A...555A..11E. doi:10.1051/0004-6361/201321050.

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