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26 Vulpeculae

{{Short description|Binary star system in the constellation Vulpecula}}

{{Starbox begin

| name = 26 Vulpeculae

}}

{{Starbox observe

| epoch = J2000.0

| constell = Vulpecula

| ra = {{RA|20|36|08.3399}}

| dec = {{DEC|+25|52|57.5615}}

| appmag_v = 6.40

}}

{{Starbox character

| type =

| class = A5 III

| b-v = {{Val|0.158|0.005}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−63.4|2.3}}

| prop_mo_ra = +26.010

| prop_mo_dec = +12.189

| parallax = 5.0684

| p_error = 0.0346

| parallax_footnote =

| absmag_v = −0.04

}}

{{Starbox orbit

| reference =

| period_unitless = 11.088 d

| eccentricity = 0.28

| periastron = {{Val|2426492.6090|ul=JD|fmt=commas}}

| periarg = 50.1

| k1 = 58.7

}}

{{Starbox detail

| mass =

| radius = 4.6

| gravity =

| luminosity = 79.75

| temperature = 7,888

| metal_fe =

| rotational_velocity = 15

| age_gyr =

}}

{{Starbox catalog

| names = {{odlist | F=26 Vul | BD=+25°4299 | HD=196362 | HIP=101641 | HR=7874 | SAO=88884 }}

}}

{{Starbox reference

| Simbad = 26+Vul

}}

{{Starbox end}}

26 Vulpeculae is a close binary star system in the northern constellation of Vulpecula, around 644 light years away from the Sun. It is a challenge to view with the naked eye, having an apparent visual magnitude of 6.40. The star is moving closer to the Earth with a heliocentric radial velocity of −63 km/s, and is expected to come within {{Convert|68.91|pc|ly|0|disp=out|abbr=off}} in around 2.6 million years.

This is a single-lined spectroscopic binary with an orbital period of 11 days and an eccentricity of 0.28. The visible component is a suspected chemically peculiar star with a stellar classification of A5 III, suggesting this is an evolved giant star. It has about 4.6 times the Sun's radius and is radiating 80 times the Sun's luminosity from its photosphere at an effective temperature of 7,888 K.

References

{{Reflist|refs=

{{cite DR2|1845878713633577344}}

{{cite simbad | title=26 Vul | access-date=2019-03-17 }}

{{citation

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| year=2004 | pages=727–732 | volume=424

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| arxiv=astro-ph/0205255 | s2cid=14070763 | postscript=. }}

{{citation | display-authors=1

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| edition=Third | journal=Astronomy and Astrophysics

| volume=367 | pages=521–524 | date=February 2001

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{{citation

| display-authors=1 | last1=McDonald | first1=I.

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| journal=Monthly Notices of the Royal Astronomical Society

| volume=427 | issue=1 | pages=343–357 | year=2012 | postscript=.

| doi=10.1111/j.1365-2966.2012.21873.x | doi-access=free | bibcode=2012MNRAS.427..343M |arxiv = 1208.2037 | s2cid=118665352 }}

{{citation

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| journal=Astronomy Letters

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

| bibcode=2006AstL...32..759G | arxiv=1606.08053

| doi=10.1134/S1063773706110065 | s2cid=119231169 | postscript=. }}

{{citation

| 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 | display-authors=1

| volume=74 | pages=375–406 | date=April 1969

| doi=10.1086/110819 | bibcode=1969AJ.....74..375C }}

{{citation | postscript=.

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters | arxiv=1108.4971

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

| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644

}}

{{citation

| last1=Renson | first1=P. | last2=Manfroid | first2=J.

| title=Catalogue of Ap, HgMn and Am stars

| journal=Astronomy and Astrophysics | postscript=.

| volume=498 | issue=3 | pages=961–966 | date=May 2009

| doi=10.1051/0004-6361/200810788 | bibcode=2009A&A...498..961R | doi-access=free | url=https://zenodo.org/record/890529 }}

}}

External links

  • {{WikiSky}}

{{Stars of Vulpecula}}

{{DEFAULTSORT:Vulpeculae, 26}}

Category:A-type giants

Category:Spectroscopic binaries

Category:Vulpecula

Category:Durchmusterung objects

Vulpeculae, 26

196362

101641

7874