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{{Starbox detail
{{Starbox detail
| component1 = HR 5553 A
| component1 = HR 5553 A
| mass = 0.79<ref name=mnras447_1_L75/>
| mass = 0.84<ref name=aa570_A114/>
| radius =
| radius = 0.86<ref name=aa570_A114/>
| luminosity =
| luminosity = 0.498<ref name=aa570_A114/>
| temperature = 5,313<ref name=aa555_A11/>
| temperature = 5,313<ref name=aa555_A11/>
| metal_fe = 0.10<ref name=aa555_A11/>
| metal_fe = 0.10<ref name=aa555_A11/>
| rotation =
| rotation = 10.4<ref name=aa555_A11/>
| rotational_velocity = 4.0<ref name=aa555_A11/>
| rotational_velocity = 4.0<ref name=aa555_A11/>
| gravity = 4.57<ref name=aa555_A11/>
| gravity = 4.57<ref name=aa555_A11/>
| age_gyr = 0.7–1.3<ref name="apj687"/>
| age_gyr = 0.7–1.3<ref name="apj687"/>
| component1 = HR 5553 B
| component2 = HR 5553 B
| mass2 = 0.45<ref name=mnras447_1_L75/>
| mass2 = 0.45<ref name=mnras447_1_L75/>
}}
}}
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'''HR 5553''' is a binary star system located thirty-eight light-years away, in the constellation [[Boötes]]. The combined spectrum of the pair matches that of a [[K-type main sequence star]] with a [[stellar classification]] of K2&nbsp;V. The two stars orbit each other with a [[orbital period|period]] of 125.396 days and a large [[orbital eccentricity|eccentricity]] of 0.51. The [[semi-major axis]] of their orbit is no smaller than 0.19&nbsp;[[Astronomical Unit|AU]].<ref name=mnras447_1_L75/>
'''HR 5553''' is a binary star system located thirty-eight light-years away, in the constellation [[Boötes]]. The combined spectrum of the pair matches that of a [[K-type main sequence star]] with a [[stellar classification]] of K2&nbsp;V. The two stars orbit each other with a [[orbital period|period]] of 125.396 days and a large [[orbital eccentricity|eccentricity]] of 0.51. The [[semi-major axis]] of their orbit is no smaller than 0.19&nbsp;[[Astronomical Unit|AU]].<ref name=mnras447_1_L75/>


An [[infrared excess]] has been detected around this star, most likely indicating the presence of a [[circumstellar disk]] at a radius of 34.2&nbsp;[[Astronomical Unit|AU]]. The temperature of this dust is 40&nbsp;K.<ref name=aa555_A11/>
An [[infrared excess]] has been detected around this star, most likely indicating the presence of a [[circumstellar disk]] at a radius of 34.2&nbsp;[[Astronomical Unit|AU]]. The temperature of this dust is 40&nbsp;K.<ref name=aa555_A11/> The estimated mass of the dust is 0.0002 times the mass of the [[Earth]].<ref name=aa570_A114/>


==References==
==References==
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| doi=10.1093/mnrasl/slu190
| doi=10.1093/mnrasl/slu190
| bibcode=2015MNRAS.447L..75K
| bibcode=2015MNRAS.447L..75K
| postscript=.
}}</ref>

<ref name=aa570_A114>{{citation
| display-authors=1
| last1=Marshall | first1=J. P. | last2=Kirchschlager | first2=F.
| last3=Ertel | first3=S. | last4=Augereau | first4=J.-C.
| last5=Kennedy | first5=G. M. | last6=Booth | first6=M.
| last7=Wolf | first7=S. | last8=Montesinos | first8=B.
| last9=Eiroa | first9=C. | last10=Matthews | first10=B.
| title=Interpreting the extended emission around three nearby debris disc host stars
| journal=Astronomy & Astrophysics
| volume=570 | id=A114 | pages=13
| date=October 2014
| doi=10.1051/0004-6361/201424517
| bibcode=2014A&A...570A.114M
| postscript=.
| postscript=.
}}</ref>
}}</ref>
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[[Category:Solar-type stars|Bootis, DE]]
[[Category:Solar-type stars|Bootis, DE]]
[[Category:HR objects|5553]]
[[Category:HR objects|5553]]



{{main-star-stub}}
{{main-star-stub}}

Revision as of 20:18, 3 November 2015

HR 5553
Observation data
Epoch 2000      Equinox 2000
Constellation Boötes
Right ascension 14h 53m 23.8s
Declination +19° 09′ 10.1″
Characteristics
Spectral type K2 V
U−B color index 0.50
B−V color index 0.84
Astrometry
Radial velocity (Rv)−31.0 km/s
Proper motion (μ) RA: −442.75 mas/yr
Dec.: +216.84 mas/yr
Parallax (π)86.68 ± 0.80 mas
Distance37.6 ± 0.3 ly
(11.5 ± 0.1 pc)
Orbit[1]
Period (P)125.396 ± 0.001 d
Semi-major axis (a)0.19 ± 0.03 AU
Eccentricity (e)0.51 ± 0.001
Inclination (i)93.4 ± 4.2°
Longitude of the node (Ω)248.3° ± 3.6°
Argument of periastron (ω)
(secondary)		219° ± 0.1°
Details
HR 5553 A
Mass0.84[2] M☉
Radius0.86[2] R☉
Luminosity0.498[2] L☉
Surface gravity (log g)4.57[3] cgs
Temperature5,313[3] K
Metallicity [Fe/H]0.10[3] dex
Rotation10.4[3]
Rotational velocity (v sin i)4.0[3] km/s
Age0.7–1.3[4] Gyr
HR 5553 B
Mass0.45[1] M☉
Other designations
DE Boötis, BD+19 2881, GJ 567, HD 131511, HIP 72848, LHS 5279.

HR 5553 is a binary star system located thirty-eight light-years away, in the constellation Boötes. The combined spectrum of the pair matches that of a K-type main sequence star with a stellar classification of K2 V. The two stars orbit each other with a period of 125.396 days and a large eccentricity of 0.51. The semi-major axis of their orbit is no smaller than 0.19 AU.[1]

An infrared excess has been detected around this star, most likely indicating the presence of a circumstellar disk at a radius of 34.2 AU. The temperature of this dust is 40 K.[3] The estimated mass of the dust is 0.0002 times the mass of the Earth.[2]

References

  1. ^ a b c Kennedy, Grant M. (February 2015), "Nature or nurture of coplanar Tatooines: the aligned circumbinary Kuiper belt analogue around HD 131511", Monthly Notices of the Royal Astronomical Society: Letters, 447 (1): L75−L79, Bibcode:2015MNRAS.447L..75K, doi:10.1093/mnrasl/slu190.{{citation}}: CS1 maint: unflagged free DOI (link)
  2. ^ a b c d Marshall, J. P.; et al. (October 2014), "Interpreting the extended emission around three nearby debris disc host stars", Astronomy & Astrophysics, 570: 13, Bibcode:2014A&A...570A.114M, doi:10.1051/0004-6361/201424517, A114.
  3. ^ a b c d e f 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.
  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.
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