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{{about-distinguish2|e Geminorum|[[Epsilon Geminorum|ε Geminorum]]}}
{{about-distinguish2|e Geminorum|[[Epsilon Geminorum|ε Geminorum]]}}
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{{Starbox begin|name=38 Geminorum}}
{{starbox short
{{Starbox observe
⚫
|constell= [[Gemini (constellation)|Gemini]]
|epoch=[[J2000]]
⚫
|name= 38 Geminorum
⚫
|constell=[[Gemini (constellation)|Gemini]]
|type= F0Vp <ref name=SIMBAD>SIMBAD, [http://simbak.cfa.harvard.edu/simbad/sim-basic?Ident=38+Geminorum&submit=SIMBAD+search e Geminorum] (accessed 16 September 2012)</ref>
|ra={{RA|06|54|38.63478}}<ref name=HIP>{{cite journal|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|display-authors=etal|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|date=2007|arxiv=0708.1752|bibcode=2007A&A...474..653V|doi=10.1051/0004-6361:20078357}}</ref>
|ra= {{RA|06|54|38.63478}} <ref name=SIMBAD/>
|dec= {{DEC|+13|10|40.2207}} <ref name=SIMBAD/>
|dec={{DEC|+13|10|40.2207}}<ref name=HIP/>
|appmag_v=4.75 / 7.80<ref name=ORB6/>
}}
}}
{{Starbox character
⚫
'''38 Geminorum''' ('''38 Gem''') is a [[star]] in the [[constellation]] [[Gemini (constellation)|Gemini]]. Its [[apparent magnitude]] is 4.71.
|class=A8V<ref name=Abt>{{cite journal|bibcode=1995ApJS...99..135A|doi=10.1086/192182|title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars|journal=The Astrophysical Journal Supplement Series|volume=99|pages=135|year=1995|last1=Abt|first1=Helmut A.|last2=Morrell|first2=Nidia I.}}</ref> + G6V<ref name=Favata>{{cite journal|bibcode=1997A&A...323..809F|title=The [Fe/H] distribution of a volume limited sample of solar-type stars and its implications for galactic chemical evolution|journal=Astronomy and Astrophysics|volume=323|pages=809|author1=Favata|first1=F.|last2=Micela|first2=G.|last3=Sciortino|first3=S.|year=1997}}</ref>
|b-v=+0.30<ref name=Johnson>{{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}}</ref>
|u-b=+0.07<ref name=Johnson/>
|variable=''Suspected''
}}
{{Starbox astrometry
|radial_v=15.90 ± 2.3<ref>{{cite journal|url=http://adsabs.harvard.edu/abs/2006AstL...32..759G|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053}}</ref>
|prop_mo_ra=68.48<ref name=HIP/>
|prop_mo_dec=-72.98<ref name=HIP/>
|parallax=39.02
|p_error=1.56
|parallax_footnote=<ref name=HIP/>
}}
{{Starbox orbit
|reference=<ref name=ORB6>{{cite web|url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars|publisher=United States Naval Observatory|accessdate=13 August 2017}}</ref>
|period=1898.12
|axis=7.666
|inclination=130.9
|node=126.9
|periastron=B 2086.47
|eccentricity=0.000
|periarg=349.9
}}
{{Starbox detail
|component1=38 Gem A
|mass=1.51<ref name=Cvetkovic>{{cite journal|last1=Cvetkovic, Z.|last2=Ninkovic, S.|title=On the Component Masses of Visual Binaries|journal=Serbian Astronomical Journal|volume=180|pages=71–80|date=2010|doi=10.2298/SAJ1080071C|bibcode=2010SerAJ.180...71C}}</ref><ref group=note name=cvetkovic>Cvetkovic ''et al.'' gives two possible mass sums: {{solar mass|1.51 / 0.88}} or {{solar mass|1.53 / 0.85}}.</ref>
|component2=38 Gem B
|mass2=0.88<ref name=Cvetkovic/><ref group=note name=cvetkovic/>
}}
{{Starbox catalog
|names={{odlist|BD=+13° 1462|GJ=9220|HD=50635|HIP=33202|HR=2564|SAO=96265}}
}}
{{Starbox reference
|Simbad=38+Gem
}}
{{Starbox end}}
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'''38 Geminorum''' ('''38 Gem''') is a [[binary star]] in the [[constellation]] [[Gemini (constellation)|Gemini]]. Its [[apparent magnitude]] is 4.71.


==References==
==References==
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[[Category:Gemini (constellation)]]
[[Category:Gemini (constellation)]]
[[Category:F-type main-sequence stars]]
[[Category:A-type main-sequence stars]]
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[[Category:G-type main-sequence stars]]
[[Category:Binary stars]]
[[Category:Flamsteed objects|Geminorum, 38]]
[[Category:Flamsteed objects|Geminorum, 38]]
[[Category:Bayer objects|Geminorum, e]]
[[Category:Bayer objects|Geminorum, e]]
[[Category:A-type main-sequence stars]]
[[Category:Durchmusterung objects]]
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[[Category:Gliese and GJ objects|9220]]
[[Category:Henry Draper Catalogue objects|050635]]
[[Category:Hipparcos objects|033202]]
[[Category:Hipparcos objects|033202]]
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[[Category:Binary stars]]
[[Category:HR objects|2564]]
[[Category:HR objects|2564]]
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[[Category:Henry Draper Catalogue objects|050635]]




Revision as of 01:13, 14 August 2017

This article is about e Geminorum. Not to be confused with ε Geminorum.
38 Geminorum
Observation data
Epoch J2000      Equinox J2000
Constellation Gemini
Right ascension 06h 54m 38.63478s[1]
Declination +13° 10′ 40.2207″[1]
Apparent magnitude (V) 4.75 / 7.80[2]
Characteristics
Spectral type A8V[3] + G6V[4]
U−B color index +0.07[5]
B−V color index +0.30[5]
Variable type Suspected
Astrometry
Radial velocity (Rv)15.90 ± 2.3[6] km/s
Proper motion (μ) RA: 68.48[1] mas/yr
Dec.: -72.98[1] mas/yr
Parallax (π)39.02 ± 1.56 mas[1]
Distance84 ± 3 ly
(26 ± 1 pc)
Orbit[2]
Period (P)1898.12 yr
Semi-major axis (a)7.666″
Eccentricity (e)0.000
Inclination (i)130.9°
Longitude of the node (Ω)126.9°
Periastron epoch (T)B 2086.47
Argument of periastron (ω)
(secondary)		349.9°
Details
38 Gem A
Mass1.51[7][note 1] M☉
38 Gem B
Mass0.88[7][note 1] M☉
Other designations
BD+13° 1462, GJ 9220, HD 50635, HIP 33202, HR 2564, SAO 96265
Database references
SIMBADdata

38 Geminorum (38 Gem) is a binary star in the constellation Gemini. Its apparent magnitude is 4.71.

References

  1. ^ a b c d e van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. ^ a b "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 13 August 2017.
  3. ^ Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182.
  4. ^ Favata, F.; Micela, G.; Sciortino, S. (1997). "The [Fe/H] distribution of a volume limited sample of solar-type stars and its implications for galactic chemical evolution". Astronomy and Astrophysics. 323: 809. Bibcode:1997A&A...323..809F.
  5. ^ a b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
  6. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  7. ^ a b Cvetkovic, Z.; Ninkovic, S. (2010). "On the Component Masses of Visual Binaries". Serbian Astronomical Journal. 180: 71–80. Bibcode:2010SerAJ.180...71C. doi:10.2298/SAJ1080071C.


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