Jump to content

HD 194244: Difference between revisions

From Wikipedia, the free encyclopedia
Browse history interactively
← Previous editNext edit →
Content deleted Content added
VisualWikitext
Added more detail to what it is
Data update w/ refs.; removing unsourced data
Line 1: Line 1:
{{Starbox begin
{{No footnotes|date=October 2010}}
| name=HD 194244

}}
{{Starbox begin |
{{Starbox observe
name=HD 194244 }}
| epoch=J2000
{{Starbox observe |
| ra={{RA|20|24|37.49846}}<ref name="van Leeuwen2007"/>
epoch=J2000 |
| dec={{DEC|+01|04|06.2592}}<ref name="van Leeuwen2007"/>
ra={{RA|20|24|37.4982}} |
| appmag_v=6.14<ref name=mnassa23_175/>
dec={{DEC|+01|04|06.261}} |
| constell=[[Aquila (constellation)|Aquila]]
appmag_v=6.144 |
}}
constell=[[Aquila (constellation)|Aquila]] }}
{{Starbox character |
{{Starbox character
class=B9V |
| class=B9V<ref name=aj74_375/>
r-i = |
| r-i =
v-r = |
| v-r =
b-v = -0.04 |
| b-v = −0.04<ref name=mnassa23_175/>
u-b = -0.14 |
| u-b = −0.14<ref name=mnassa23_175/>
variable=[[Variable star]] }}
| variable=
}}
{{Starbox astrometry |
{{Starbox astrometry
radial_v=-9 |
| radial_v={{val|−9.6|0.9}}<ref name="Gontcharov"/>
prop_mo_ra=7.93 |
| prop_mo_ra=+8.37<ref name="van Leeuwen2007"/>
prop_mo_dec= 5.49 |
| prop_mo_dec=+5.26<ref name="van Leeuwen2007"/>
parallax=3.88 |
| parallax=4.04
p_error=0.92 |
| p_error=0.39
absmag_v=6.107 }}
| parallax_footnote=<ref name="van Leeuwen2007"/>
{{Starbox detail|
| absmag_v=
mass=18 |
}}
radius=7 |
{{Starbox detail
luminosity=20,000 |
| mass=
temperature=10,000–30,000 |
| radius=
metal= |
| luminosity=173<ref name=Mcdonald/>
rotational_velocity=265 Km/s |
| temperature=8,822<ref name=Mcdonald/>
age= }}
| metal_fe=
{{Starbox catalog |
| rotational_velocity=222<ref name=aaa463_2_671/>
names=[[Bright Star Catalogue|HR]] 7803, [[Durchmusterung|BD]]+00° 4495, [[Henry Draper Catalogue|HD]] 194244, [[Hipparcos Catalogue|HIP]] 100664, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 125769. }}
| age=
{{Starbox reference |
}}
Simbad=HD+194244
{{Starbox catalog
| ARICNS = }}
| names=[[Durchmusterung|BD]]+00° 4495, [[Henry Draper Catalogue|HD]] 194244, [[Hipparcos Catalogue|HIP]] 100664, [[Bright Star Catalogue|HR]] 7803, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 125769.
{{Starbox reference |
}}
Simbad=ADS+13811 }}
{{Starbox reference
| Simbad=HD+194244
}}
{{Starbox reference
| Simbad=ADS+13811
}}
{{starbox sources|HIP|CCDM|HR}}
{{starbox sources|HIP|CCDM|HR}}
{{Starbox end}}
{{Starbox end}}
'''HD 194244''' is a [[variable star|variable]] [[Be star]]<ref name="apjss156_2_237"/> in the equatorial constellation of [[Aquila (constellation)|Aquila]]. With an [[apparent magnitude]] of 6.14, it is faintly visible to the naked eye on a dark night according to the [[Bortle scale]].
'''HD 194244''' is a variable star. It is a part of the constellation Aquila.


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

<ref name="van Leeuwen2007">{{citation
| title=Validation of the new Hipparcos reduction
| last1=van Leeuwen | first1=F.
| 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
}}[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=114184 Vizier catalog entry ]</ref>

<ref name="Gontcharov">{{cite doi|10.1134/S1063773706110065}}</ref>

<ref name=aj74_375>{{citation
| display-authors=1
| last1=Cowley | first1=A.
| last2=Cowley | first2=C.
| last3=Jaschek | first3=M.
| last4=Jaschek | first4=C.
| title=A study of the bright A stars. I. A catalogue of spectral classifications
| journal=Astronomical Journal | volume=74 | pages=375–406
| doi=10.1086/110819 | bibcode=1969AJ.....74..375C
| date=April 1969
}}</ref>

<ref name=mnassa23_175>{{citation
| last1=Cousins | first1=A. W. J.
| title=Photometric Data for Stars in the Equatorial Zone (Seventh List)
| journal=Monthly Notes of the Astronomical Society of Southern Africa
| volume=23 | page=175 | year=1964
| bibcode=1964MNSSA..23..175C
}}</ref>

<ref name=aaa463_2_671>{{citation
| last1=Royer | first1=F.
| last2=Zorec | first2=J.
| last3=Gómez | first3=A. E.
| title=Rotational velocities of A-type stars. III. Velocity distributions
| journal=Astronomy and Astrophysics
| volume=463 | issue=2 | pages=671–682 | date=February 2007
| doi=10.1051/0004-6361:20065224
| bibcode=2007A&A...463..671R
| arxiv=astro-ph/0610785
}}</ref>

<ref name=Mcdonald>{{citation
| last1=McDonald | first1=I.
| last2=Zijlstra | first2=A. A.
| last3=Boyer | first3=M. L.
| date=2012
| title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=427 | issue=1 | pages=343–57
| bibcode=2012MNRAS.427..343M
| arxiv=1208.2037
| doi=10.1111/j.1365-2966.2012.21873.x
}}</ref>

<ref name="apjss156_2_237">{{citation
| last1=Neiner | first1=C.
| last2=Hubert | first2=A.-M.
| last3=Catala | first3=C.
| title=The Identification of New Be Stars in GAUDI
| journal=The Astrophysical Journal Supplement Series
| volume=156 | issue=2 | pages=237–243 | date=February 2005
| doi=10.1086/426670
| bibcode=2005ApJS..156..237N
}}</ref>

}}

==External links==
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207803 HR 7803]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207803 HR 7803]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=20+24+37.4982%2B01+04+06.261&ident=SV*+ZI++1910&submit=Aladin+previewer Image HD 194244]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=20+24+37.4982%2B01+04+06.261&ident=SV*+ZI++1910&submit=Aladin+previewer Image HD 194244]


{{Stars of Aquila}}
{{Stars of Aquila|state=collapsed}}


[[Category:Aquila (constellation)]]
[[Category:Aquila (constellation)]]
Line 53: Line 131:
[[Category:B-type main-sequence stars]]
[[Category:B-type main-sequence stars]]
[[Category:HR objects|7803]]
[[Category:HR objects|7803]]



{{Multi-star-stub}}
{{Multi-star-stub}}

Revision as of 14:57, 14 June 2015

HD 194244
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 20h 24m 37.49846s[1]
Declination +01° 04′ 06.2592″[1]
Apparent magnitude (V) 6.14[2]
Characteristics
Spectral type B9V[3]
U−B color index −0.14[2]
B−V color index −0.04[2]
Astrometry
Radial velocity (Rv)−9.6±0.9[4] km/s
Proper motion (μ) RA: +8.37[1] mas/yr
Dec.: +5.26[1] mas/yr
Parallax (π)4.04 ± 0.39 mas[1]
Distance810 ± 80 ly
(250 ± 20 pc)
Details
Luminosity173[5] L☉
Temperature8,822[5] K
Rotational velocity (v sin i)222[6] km/s
Other designations
BD+00° 4495, HD 194244, HIP 100664, HR 7803, SAO 125769.
Database references
SIMBADdata
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HD 194244 is a variable Be star[7] in the equatorial constellation of Aquila. With an apparent magnitude of 6.14, it is faintly visible to the naked eye on a dark night according to the Bortle scale.

References

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357Vizier catalog entry
  2. ^ a b c Cousins, A. W. J. (1964), "Photometric Data for Stars in the Equatorial Zone (Seventh List)", Monthly Notes of the Astronomical Society of Southern Africa, 23: 175, Bibcode:1964MNSSA..23..175C
  3. ^ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
  4. ^ Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1134/S1063773706110065, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1134/S1063773706110065 instead.
  5. ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
  6. ^ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224
  7. ^ Neiner, C.; Hubert, A.-M.; Catala, C. (February 2005), "The Identification of New Be Stars in GAUDI", The Astrophysical Journal Supplement Series, 156 (2): 237–243, Bibcode:2005ApJS..156..237N, doi:10.1086/426670

External links

Stub icon

This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it.

Stub icon

This variable star–related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=HD_194244&oldid=666911038"