HR 4102

{{about|I Carinae|i Carinae|HD 79447|l Carinae|HD 84810|ι Carinae|Iota Carinae}}

{{Starbox begin

| name = HR 4102

}}

{{Starbox observe

| epoch = J2000.0

| constell = Carina

| ra = {{RA|10|24|23.70597}}

| dec = {{DEC|−74|01|53.8036}}

| appmag_v = 3.99

}}

{{Starbox character

| class = F3 V

| b-v = +0.36

| u-b = −0.01

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−4.7|0.6}}

| prop_mo_ra = −16.29

| prop_mo_dec = −27.67

| parallax = 61.64

| p_error = 0.12

| parallax_footnote =

| absmag_v = 2.94

}}

{{Starbox detail

| mass = 1.42

| radius = 1.592

| luminosity = 5.015

| gravity = 4.34

| temperature = {{Val|7017|239|fmt=commas}}

| metal_fe = +0.02

| rotational_velocity = 51.6

| age_myr = 977

}}

{{Starbox catalog

| names = {{odlist | B=I Car | CD=−73° 576 | GJ=391 | HD=90589 | HIP=50954 | HR=4102 | SAO=256710 }}

}}

{{Starbox reference

| Simbad = I+Car

}}

I Carinae is a single, yellow-white hued star in the southern constellation Carina. It is a fourth magnitude star that is visible to the naked eye. An annual parallax shift of 61.64 mas provides a distance estimate of 62 light years. It is moving closer with a radial velocity of −5 km/s, and in an estimated 2.7 million years will pass within {{Convert|7.46|pc|ly|order=flip|abbr=on}} of the Sun. In the next 7500 years, the south Celestial pole will pass close to this star and Omega Carinae (5800 CE).{{Cite web|url=http://moonkmft.co.uk/Precession.html|title = Precession}}

Gray et al. (2006) gave this star a stellar classification of F3 V, indicating it is an F-type main-sequence star that is generating energy through hydrogen fusion at its core. It is younger than the Sun with an estimated age of 977 million years, and is spinning with a projected rotational velocity of 51.6 km/s. The star has 1.4 times the mass of the Sun, 1.6 times its radius, and is radiating 5.56 times the Sun's luminosity from its photosphere at an effective temperature of around 7,017 K. It is a variable star and most likely (99.2% chance) the source of detected X-ray emission coming from these coordinates.

References

{{reflist|refs=

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| journal=The Astrophysical Journal Supplement

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{{citation

| title=XHIP: An extended hipparcos compilation

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| volume=38 | issue=5 | pages=331 | year=2012

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{{citation

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| title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets

| journal=The Astrophysical Journal

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| bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146

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{{citation

| last1=Bailer-Jones | first1=C. A. L.

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| journal=Astronomy & Astrophysics

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}}

{{citation

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| volume=389 | issue=2 | pages=869–879 | date=September 2008

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| arxiv=0806.2878 | s2cid=14878976 | postscript=. }}

{{citation | last1=Schröder | first1=C. | last2=Reiners | first2=Ansgar | last3=Schmitt | first3=Jürgen H. M. M. | title=Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo | journal=Astronomy and Astrophysics | volume=493 | issue=3 | pages=1099–1107 | date=January 2009 | doi=10.1051/0004-6361:200810377 | bibcode=2009A&A...493.1099S | doi-access=free | url=http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 }}{{Dead link|date=September 2023 |bot=InternetArchiveBot |fix-attempted=yes }}

{{citation

| title=Photoelectric magnitudes and colours of Southern stars.

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| journal=Royal Observatory Bulletin | volume=64 | date=1962

| page=103 | bibcode=1962RGOB...64..103C | postscript=. }}

{{citation

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| title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system

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| volume=32| issue=11| pages=759–771| date=November 2006

| doi = 10.1134/S1063773706110065| bibcode=2006AstL...32..759G |arxiv = 1606.08053 | s2cid=119231169

}}

{{citation | display-authors=1

| last1=Gray | first1=R. O. | last2=Corbally | first2=C. J.

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| title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample

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{{Citation |last1=Schofield |first1=Mathew |last2=Chaplin |first2=William J. |last3=Huber |first3=Daniel |last4=Campante |first4=Tiago L. |last5=Davies |first5=Guy R. |last6=Miglio |first6=Andrea |last7=Ball |first7=Warrick H. |last8=Appourchaux |first8=Thierry |last9=Basu |first9=Sarbani |last10=Bedding |first10=Timothy R. |last11=Christensen-Dalsgaard |first11=Jørgen |last12=Creevey |first12=Orlagh |last13=García |first13=Rafael A. |last14=Handberg |first14=Rasmus |last15=Kawaler |first15=Steven D. |date=2019-03-01 |title=The Asteroseismic Target List for Solar-like Oscillators Observed in 2 minute Cadence with the Transiting Exoplanet Survey Satellite |bibcode=2019ApJS..241...12S |arxiv=1901.10148 |journal=The Astrophysical Journal Supplement Series |volume=241 |issue=1 |pages=12 |doi=10.3847/1538-4365/ab04f5 |doi-access=free |issn=0067-0049}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJS/241/12&TIC=453620177 I Carinae's database entry] at VizieR.

}}

Category:F-type main-sequence stars

Carinae, I

Category:Carina (constellation)

Category:Durchmusterung objects

Category:Southern pole stars