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Coordinates: Sky map 11h 45m 42.2920s, +02° 49′ 17.340″
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{{Short description|Star in the constellation Virgo}}
{{starbox short
{{Starbox begin
| name = [[Henry Draper catalogue|HD]] 102195
| name = HD 102195 / Flegetonte
| epoch = J2000.0
| constell = [[Virgo (constellation)|Virgo]]
| ra = {{RA|11|45|42.2920}}
| dec = {{DEC|+02|49|17.340}}
| appmag_v = 8.05
| dist_ly = 94.52
| dist_pc = 28.98
| spectral = K0V
| names = [[Durchmusterung|BD]]+03°2549, [[Boss General Catalogue|GC]] 16129, [[Hipparcos catalogue|HIP]] 57370, [[Luyten Two-Tenths catalogue|LTT]] 13232, [[New Luyten Two-Tenths catalogue|NLTT]] 28458, [[Smithsonian Astrophysical Observatory catalogue|SAO]] 119033
| Simbad = HD+102195
| EPE = HD+102195
}}
}}
{{Starbox observe
| epoch = J2000
| constell = [[Virgo (constellation)|Virgo]]
| ra = {{RA|11|45|42.29278}}<ref name=GaiaDR2/>
| dec = {{DEC|+02|49|17.3262}}<ref name=GaiaDR2/>
| appmag_v = 8.07<ref name=Melo2007/>
}}
{{Starbox character
| type =
| class = K0&nbsp;V<ref name=Houk1999/>
| b-v = 0.835<ref name=Melo2007/>
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|1.85|0.15}}<ref name=GaiaDR2/>
| prop_mo_ra = −188.735<ref name=GaiaDR2/>
| prop_mo_dec = −113.403<ref name=GaiaDR2/>
| parallax = 34.0560
| p_error = 0.0555
| parallax_footnote = <ref name=GaiaDR2/>
| absmag_v = 5.76<ref name=Melo2007/>
}}
{{Starbox detail
| source = <ref name=Bonfanti2016/>
| mass = {{Val|0.88|0.03}}
| radius = {{Val|0.84|0.02}}
| luminosity = {{Val|0.49|0.01}}
| gravity = {{Val|4.53|0.03}}
| temperature = {{Val|5283|29|fmt=commas}}
| metal_fe = +0.09<ref name=Brewer2016/>
| rotational_velocity = 2.6<ref name=Melo2007/>
| rotation = 12.3&nbsp;d<ref name=Vidotto2014/>
| age_gyr = {{Val|5.9|3.5}}
}}
{{Starbox catalog
| names={{odlist | BD=+03°2549 | HD=102195 | HIP=57370 | HR=4293 | LTT=13232 | NLTT=28458 | SAO=119033 }}<ref name=SIMBAD/>
}}
{{Starbox reference
| Simbad = HD+102195
| EPE = HD+102195
}}
{{Starbox end}}

'''HD 102195''' is an orange-hued [[star]] in the [[zodiac]] [[constellation]] of [[Virgo (constellation)|Virgo]] with a confirmed [[exoplanet]] companion.<ref name=Melo2007/> With an [[apparent visual magnitude]] of 8.07,<ref name=Melo2007/> the star is too faint to be seen with the naked eye. The distance to HD 102195 can be estimated from its annual [[stellar parallax|parallax shift]] of {{Val|34.06|ul=mas}},<ref name=GaiaDR2/> yielding 95.8&nbsp;[[light year]]s. It is moving further away from the Earth with a heliocentric [[radial velocity]] of 1.85&nbsp;km/s.<ref name=GaiaDR2/> This is a high [[proper motion]] star and a possible member of the [[Eta Chamaeleontis|η Cha]] [[stellar kinematic group]].<ref name=Nakajima2012/>

The star HD 102195 is named '''Flegetonte'''. The name was selected in the [[NameExoWorlds]] campaign by [[Italy]], during the 100th anniversary of the [[International Astronomical Union|IAU]]. Flegetonte is the underworld river of fire from [[Greek mythology|Greek Mythology]] in the Italian narrative poem on the afterlife [[Divine Comedy|Divina Commedia]].<ref>{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}</ref><ref>{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}</ref>

This [[K-type main-sequence star]] has a [[stellar classification]] of K0&nbsp;V.<ref name=Houk1999/> It is a quasi-periodic [[variable star]] with a cycle of 11.5&nbsp;days, a variation range of 3.65%, and a phased [[amplitude]] of 94%.<ref name=Armstrong2015/> HD 102195 is around six billion years old with a rotation period of 12.3&nbsp;days.<ref name=Vidotto2014/> It has 88% of the [[Sun's mass]] and 84% of the [[Sun's radius]]. It is radiating 49% of the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 5,283&nbsp;K.<ref name=Bonfanti2016/>


In 2005, an orbiting companion was detected using the [[Exoplanet Tracker]] instrument.<ref name="Ge2006"/> This near [[Jupiter]]-mass exoplanet has an orbital period of 4.1 days with a circular orbit. By comparing the rotation period and radius of the star with the [[projected rotational velocity]], Melo et al. (2007) derived an [[orbital inclination]] of 47°. This would suggest a planetary mass of {{Val|0.62|ul=Jupiter mass}}.<ref name=Melo2007/>
'''HD 102195''' is an orange [[main sequence]] [[star]] about 94 [[light year]]s away in the [[constellation]] of [[Virgo (constellation)|Virgo]]. In January 2006, an [[exoplanet]] was discovered orbiting the star by [[Exoplanet Tracker]].


{{OrbitboxPlanet begin
{{OrbitboxPlanet begin
| table_ref = <ref name=Melo2007/>
| table_ref = <ref>{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/648/1/683/64742.html | author=Ge | title=The First Extrasolar Planet Discovered with a New-Generation High-Throughput Doppler Instrument | journal=The [[Astrophysical Journal]] | volume=648 | issue=1 | year=2006 | pages=683–695 | doi=10.1086/505699 | last2=Van Eyken | first2=Julian | last3=Mahadevan | first3=Suvrath | last4=Dewitt | first4=Curtis | last5=Kane | first5=Stephen R. | last6=Cohen | first6=Roger | last7=Vanden Heuvel | first7=Andrew | last8=Fleming | first8=Scott W. | last9=Guo | first9=Pengcheng | bibcode=2006ApJ...648..683G|arxiv = astro-ph/0605247 | display-authors=1 }}</ref>}}
}}
{{OrbitboxPlanet
{{OrbitboxPlanet
| exoplanet = [[HD 102195 b|ET-1]]
| exoplanet = [[HD 102195 b|b / Lete]]
| mass = >0.488 ± 0.015
| mass = ≥0.45
| period = 4.11434 ± 0.00089
| period = {{Val|4.113775|0.000557}}
| semimajor = 0.0491
| semimajor = 0.0491<ref name="Ge2006"/>
| eccentricity = <0.14
| eccentricity = 0.0&nbsp;(assumed)
}}
}}
{{Orbitbox end}}
{{Orbitbox end}}


== See also ==
==See also==
* [[List of extrasolar planets]]
* [[List of extrasolar planets]]


==References==
==References==
{{reflist}}
{{reflist|refs=


<ref name=SIMBAD>{{cite simbad | title=HD 95370 | access-date=2018-08-13 }}</ref>
{{Sky|11|45|42.2920|+|02|49|17.340|94.52}}


<ref name=GaiaDR2>{{Cite Gaia DR2|3799626935341796096}}</ref>

<ref name=Houk1999>{{citation
| last1=Houk | first1=N. | last2=Swift | first2=C.
| title=Michigan catalogue of two-dimensional spectral types for the HD Stars
| journal=Michigan Spectral Survey | volume=5 | year=1999
| bibcode=1999MSS...C05....0H | postscript=. }}</ref>

<ref name=Bonfanti2016>{{cite journal
| title=Age consistency between exoplanet hosts and field stars
| display-authors=1 | last1=Bonfanti | first1=A.
| last2=Ortolani | first2=S. | last3=Nascimbeni | first3=V.
| journal=Astronomy & Astrophysics
| year=2016 | volume=585 | id=A5 | pages=14
| arxiv=1511.01744 | bibcode=2016A&A...585A...5B
| doi=10.1051/0004-6361/201527297 | s2cid=53971692 }}</ref>

<ref name="Ge2006">{{cite journal
| title=The First Extrasolar Planet Discovered with a New-Generation High-Throughput Doppler Instrument
| last1=Ge | first1=Jian | last2=Van Eyken | first2=Julian
| last3=Mahadevan | first3=Suvrath | last4=Dewitt | first4=Curtis
| last5=Kane | first5=Stephen R. | last6=Cohen | first6=Roger
| last7=Vanden Heuvel | first7=Andrew | last8=Fleming | first8=Scott W.
| last9=Guo | first9=Pengcheng | last10=Henry | first10=Gregory W.
| last11=Schneider | first11=Donald P. | last12=Ramsey | first12=Lawrence W.
| last13=Wittenmyer | first13=Robert A. | last14=Endl | first14=Michael
| last15=Cochran | first15=William D. | last16=Ford | first16=Eric B.
| last17=Martín | first17=Eduardo L. | last18=Israelian | first18=Garik
| last19=Valenti | first19=Jeff | last20=Montes | first20=David
| display-authors=1 | journal=The Astrophysical Journal
| volume=648 | issue=1 | pages=683–695 | year=2006
| arxiv=astro-ph/0605247 | bibcode=2006ApJ...648..683G
| doi=10.1086/505699 | s2cid=13879217 }}</ref>

<ref name=Vidotto2014>{{cite journal
| title=Stellar magnetism: empirical trends with age and rotation
| last1=Vidotto | first1=A. A. | last2=Gregory | first2=S. G.
| last3=Jardine | first3=M. | last4=Donati | first4=J. F.
| last5=Petit | first5=P. | last6=Morin | first6=J.
| last7=Folsom | first7=C. P. | last8=Bouvier | first8=J.
| last9=Cameron | first9=A. C. | last10=Hussain | first10=G.
| last11=Marsden | first11=S. | last12=Waite | first12=I. A.
| last13=Fares | first13=R. | last14=Jeffers | first14=S.
| last15=do Nascimento | first15=J. D. | display-authors=1
| journal=Monthly Notices of the Royal Astronomical Society
| volume=441 | issue=3 | pages=2361–2374 | date=July 2014
| doi=10.1093/mnras/stu728 | bibcode=2014MNRAS.441.2361V | arxiv=1404.2733 | s2cid=43200119 }}</ref>

<ref name=Brewer2016>{{cite journal
| title=Spectral Properties of Cool Stars: Extended Abundance Analysis of 1,617 Planet-Search Stars
| last1=Brewer | first1=John M. | last2=Fischer | first2=Debra A.
| last3=Valenti | first3=Jeff A. | last4=Piskunov | first4=Nikolai
| journal=The Astrophysical Journal Supplement Series
| volume=225 | issue=2 | pages=32 | year=2016
| bibcode=2016ApJS..225...32B | doi=10.3847/0067-0049/225/2/32
| arxiv=1606.07929 | s2cid=118507965 | doi-access=free }}</ref>

<ref name=Armstrong2015>{{cite journal
| title=K2 Variable Catalogue: Variable stars and eclipsing binaries in K2 campaigns 1 and 0
| display-authors=1 | last1=Armstrong | first1=D. J.
| last2=Kirk | first2=J. | last3=Lam | first3=K. W. F.
| last4=McCormac | first4=J. | last5=Walker | first5=S. R.
| last6=Brown | first6=D. J. A. | last7=Osborn | first7=H. P.
| last8=Pollacco | first8=D. L. | last9=Spake | first9=J.
| journal=Astronomy & Astrophysics
| volume=579 | id=A19 | pages=6 | date=July 2015
| doi=10.1051/0004-6361/201525889 | bibcode=2015A&A...579A..19A | arxiv=1502.04004 | s2cid=16637550 }}</ref>

<ref name=Melo2007>{{cite journal
| title=A new Neptune-mass planet orbiting HD 219828
| display-authors=1 | last1=Melo | first1=C.
| last2=Santos | first2=N. C. | last3=Gieren | first3=W.
| last4=Pietrzynski | first4=G. | last5=Ruiz | first5=M. T.
| last6=Sousa | first6=S. G. | last7=Bouchy | first7=F.
| last8=Lovis | first8=C. | last9=Mayor | first9=M.
| last10=Pepe | first10=F. | last11=Queloz | first11=D.
| last12=da Silva | first12=R. | last13=Udry | first13=S.
| journal=Astronomy and Astrophysics
| volume=467 | issue=2 | date=May 2007 | pages=721–727
| doi=10.1051/0004-6361:20066845 | bibcode=2007A&A...467..721M
| arxiv=astro-ph/0702459 | s2cid=13524822 }}</ref>

<ref name=Nakajima2012>{{cite journal
| last1=Nakajima | first1=Tadashi | last2=Morino | first2=Jun-Ichi
| title=Potential Members of Stellar Kinematic Groups within 30 pc of the Sun
| journal=The Astronomical Journal
| volume=143 | issue=1 | page=2 | date=January 2012
| doi=10.1088/0004-6256/143/1/2 | bibcode=2012AJ....143....2N | doi-access=free }}</ref>

}}

{{Sky|11|45|42.2920|+|02|49|17.340|94.52}}
{{Stars of Virgo}}
{{Stars of Virgo}}


{{DEFAULTSORT:HD 102195}}
[[Category:K-type main-sequence stars]]
[[Category:K-type main-sequence stars]]
[[Category:Planetary systems with one confirmed planet]]
[[Category:Virgo (constellation)]]
[[Category:Durchmusterung objects|BD+03 2549]]
[[Category:Henry Draper Catalogue objects|102195]]
[[Category:Henry Draper Catalogue objects|102195]]
[[Category:Hipparcos objects|057370]]
[[Category:Hipparcos objects|057370]]
[[Category:Virgo (constellation)]]
[[Category:Stars with proper names|Flegetonte]]
[[Category:Planetary systems]]


{{main-star-stub}}

Revision as of 00:10, 28 November 2023

HD 102195 / Flegetonte
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 11h 45m 42.29278s[1]
Declination +02° 49′ 17.3262″[1]
Apparent magnitude (V) 8.07[2]
Characteristics
Spectral type K0 V[3]
B−V color index 0.835[2]
Astrometry
Radial velocity (Rv)1.85±0.15[1] km/s
Proper motion (μ) RA: −188.735[1] mas/yr
Dec.: −113.403[1] mas/yr
Parallax (π)34.0560 ± 0.0555 mas[1]
Distance95.8 ± 0.2 ly
(29.36 ± 0.05 pc)
Absolute magnitude (MV)5.76[2]
Details[4]
Mass0.88±0.03 M☉
Radius0.84±0.02 R☉
Luminosity0.49±0.01 L☉
Surface gravity (log g)4.53±0.03 cgs
Temperature5,283±29 K
Metallicity [Fe/H]+0.09[5] dex
Rotation12.3 d[6]
Rotational velocity (v sin i)2.6[2] km/s
Age5.9±3.5 Gyr
Other designations
BD+03°2549, HD 102195, HIP 57370, HR 4293, SAO 119033, LTT 13232, NLTT 28458[7]
Database references
SIMBADdata

HD 102195 is an orange-hued star in the zodiac constellation of Virgo with a confirmed exoplanet companion.[2] With an apparent visual magnitude of 8.07,[2] the star is too faint to be seen with the naked eye. The distance to HD 102195 can be estimated from its annual parallax shift of 34.06 mas,[1] yielding 95.8 light years. It is moving further away from the Earth with a heliocentric radial velocity of 1.85 km/s.[1] This is a high proper motion star and a possible member of the η Cha stellar kinematic group.[8]

The star HD 102195 is named Flegetonte. The name was selected in the NameExoWorlds campaign by Italy, during the 100th anniversary of the IAU. Flegetonte is the underworld river of fire from Greek Mythology in the Italian narrative poem on the afterlife Divina Commedia.[9][10]

This K-type main-sequence star has a stellar classification of K0 V.[3] It is a quasi-periodic variable star with a cycle of 11.5 days, a variation range of 3.65%, and a phased amplitude of 94%.[11] HD 102195 is around six billion years old with a rotation period of 12.3 days.[6] It has 88% of the Sun's mass and 84% of the Sun's radius. It is radiating 49% of the Sun's luminosity from its photosphere at an effective temperature of 5,283 K.[4]

In 2005, an orbiting companion was detected using the Exoplanet Tracker instrument.[12] This near Jupiter-mass exoplanet has an orbital period of 4.1 days with a circular orbit. By comparing the rotation period and radius of the star with the projected rotational velocity, Melo et al. (2007) derived an orbital inclination of 47°. This would suggest a planetary mass of 0.62 MJ.[2]

The HD 102195 planetary system[2]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b / Lete ≥0.45 MJ 0.0491[12] 4.113775±0.000557 0.0 (assumed) — —

See also

References

  1. ^ a b c d e f g h Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d e f g h Melo, C.; et al. (May 2007). "A new Neptune-mass planet orbiting HD 219828". Astronomy and Astrophysics. 467 (2): 721–727. arXiv:astro-ph/0702459. Bibcode:2007A&A...467..721M. doi:10.1051/0004-6361:20066845. S2CID 13524822.
  3. ^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  4. ^ a b Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692. A5.
  5. ^ Brewer, John M.; Fischer, Debra A.; Valenti, Jeff A.; Piskunov, Nikolai (2016). "Spectral Properties of Cool Stars: Extended Abundance Analysis of 1,617 Planet-Search Stars". The Astrophysical Journal Supplement Series. 225 (2): 32. arXiv:1606.07929. Bibcode:2016ApJS..225...32B. doi:10.3847/0067-0049/225/2/32. S2CID 118507965.
  6. ^ a b Vidotto, A. A.; et al. (July 2014). "Stellar magnetism: empirical trends with age and rotation". Monthly Notices of the Royal Astronomical Society. 441 (3): 2361–2374. arXiv:1404.2733. Bibcode:2014MNRAS.441.2361V. doi:10.1093/mnras/stu728. S2CID 43200119.
  7. ^ "HD 95370". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-13.
  8. ^ Nakajima, Tadashi; Morino, Jun-Ichi (January 2012). "Potential Members of Stellar Kinematic Groups within 30 pc of the Sun". The Astronomical Journal. 143 (1): 2. Bibcode:2012AJ....143....2N. doi:10.1088/0004-6256/143/1/2.
  9. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  10. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  11. ^ Armstrong, D. J.; et al. (July 2015). "K2 Variable Catalogue: Variable stars and eclipsing binaries in K2 campaigns 1 and 0". Astronomy & Astrophysics. 579: 6. arXiv:1502.04004. Bibcode:2015A&A...579A..19A. doi:10.1051/0004-6361/201525889. S2CID 16637550. A19.
  12. ^ a b Ge, Jian; et al. (2006). "The First Extrasolar Planet Discovered with a New-Generation High-Throughput Doppler Instrument". The Astrophysical Journal. 648 (1): 683–695. arXiv:astro-ph/0605247. Bibcode:2006ApJ...648..683G. doi:10.1086/505699. S2CID 13879217.


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