57 Aquilae

{{Starbox begin

| name = 57 Aquilae

}}

{{Starbox observe 2s

| epoch = J2000

| component1 = 57 Aql A

| ra1 = {{RA|19|54|37.65152}}

| dec1 = {{DEC|-08|13|38.2390}}

| appmag_v1 = 5.70

| component2 = 57 Aql B

| ra2 = {{RA|19|54|38.06165}}

| dec2 = {{DEC|-08|14|13.3762}}

| appmag_v2 = 6.48

| constell = Aquila

}}

{{Starbox character

| class = {{nowrap|B7 Vn + B8 V}}

| r-i =

| v-r =

| b-v = −0.08/−0.04

| u-b = −0.49/−0.27

| variable =

}}

{{Starbox astrometry

| component1 = 57 Aql A

| radial_v = −6

| prop_mo_ra = +6.61

| prop_mo_dec = −25.75

| parallax = 6.76

| p_error = 0.37

| parallax_footnote =

| absmag_v =

| component2 = 57 Aql B

| radial_v2 = −5

| prop_mo_ra2 = +2.13

| prop_mo_dec2= −30.77

| parallax2 = 6.42

| p_error2 = 0.58

| parallax_footnote2 =

| absmag_v2 =

}}

{{Starbox detail

| component1 = 57 Aql A

| mass =

| radius =

| luminosity =

| temperature =

| metal_fe =

| rotational_velocity = 190

| age_gyr =

| component2 = 57 Aql B

| rotational_velocity2 = 160

}}

{{Starbox catalog

| names =

| component1 = 57 Aql A

| names1 = BD−08 5154, HD 188293, HIP 97966, HR 7593, SAO 143898

| component2 = 57 Aql B

| names2 = BD−08 5155, HD 188294, HIP 97967, HR 7594, SAO 143899

}}

{{Starbox reference

| Simbad = 57+Aql|sn=57 Aql

| Simbad2 = 57+Aql+A|sn2=57 Aql A

| Simbad3 = 57+Aql+B|sn3=57 Aql B

}}

57 Aquilae (abbreviated 57 Aql) is a double star in the constellation of Aquila. 57 Aquilae is its Flamsteed designation. The primary star has an apparent visual magnitude of 5.70, while the secondary is magnitude 6.48. The pair have an angular separation of 35.624 arcseconds and probably form a wide binary star system. The estimated distance of the first component is {{Convert|480|ly|pc|abbr=off|lk=on}}, while the second is at {{Convert|510|ly|pc|abbr=off|lk=off}}. However, the margin of errors for their respective distance estimates overlap, indicating a probability that they are actually located much closer to each other. Both stars are massive, B-type main sequence stars with rapid rotation rates.

References

{{reflist|refs=

{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | postscript=. |arxiv = 0708.1752 | s2cid=18759600 }}

{{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W | postscript=. }}

{{citation | last1=Abt | first1=Helmut A. | last2=Levato | first2=Hugo | last3=Grosso | first3=Monica | title=Rotational Velocities of B Stars | journal=The Astrophysical Journal | volume=573 | issue=1 | pages=359–365 |date=July 2002 | doi=10.1086/340590 | bibcode=2002ApJ...573..359A | postscript=. | doi-access=free }}

{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J | postscript=. }}

{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 | s2cid=14878976 }}

{{citation | title=HR 7593 -- Star in double system | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HR+7593 | access-date=2012-07-25 | postscript=. }}

{{citation | title=HR 7594 -- Star in double system | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HR+7594 | access-date=2012-07-25 | postscript=. }}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J19546-0814A CCDM J19546-0814]
[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207593 HR7593]
[http://aladin.u-strasbg.fr/AladinPreview?-c=HD+188293&ident=HD+188293&submit=Aladin+previewer Image 57 Aquilae]

188293

Category:Binary stars

Category:Aquila (constellation)

Category:Double stars

Category:B-type main-sequence stars

Aquilae, 57

097966

Category:Durchmusterung objects

7593 4