iota Serpentis

{{Starbox image

| image=

{{Location mark

|image=Serpens constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=8|mark_link=ι Ser

|x=842|y=132

}}

|caption=Location of ι Serpentis (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Serpens

| ra = {{RA|15|41|33.05469}}

| dec = {{DEC|19|40|13.4380}}

| appmag_v = 4.51

}}

{{Starbox character

| type = main sequence

| class = B9V + A1V

| b-v = {{Val|+0.062|0.003}}

| variable =

}}

{{Starbox astrometry

| radial_v = −17.20

| prop_mo_ra = −60.86

| prop_mo_dec = −43.69

| parallax = 17.16

| p_error = 0.67

| parallax_footnote =

| absmag_v = +0.69

}}

{{Starbox orbit

| reference =

| period_unitless = {{Val|8015.0|6.3|u=days}}

| axis = {{Val|0.21033|0.00047}}

| eccentricity = {{Val|0.0941|0.0028}}

| inclination = {{Val|83.608|0.043}}

| node = {{Val|69.684|0.033}}

| periastron = {{Val|54180|33|ul=HMJD|fmt=commas}}

| periarg = {{Val|80.5|1.8}}

}}

{{Starbox detail

| component1 = A

| mass = 1.999

| component2 = B

| mass2 = 1.984

}}

{{Starbox catalog

| names = {{odlist | B=ι Ser | F=21 Serpentis | BD=+20°3138 | HD=140159 | HIP=76852 | HR=5842 | SAO=101682 | ADS=9744 | GC=21102 | CCDM=J15416+1940 }}

}}

{{Starbox reference

| Simbad = iot+Ser

}}

ι Serpentis, Latinized as Iota Serpentis and abbreviated Iot Ser, is a triple star system in the constellation Serpens, in its head (Serpens Caput). It is approximately 190 light years from Earth.

At the centre of the system is a spectroscopic binary, Iota Serpentis A and B. These are both white main sequence dwarfs and both have apparent magnitudes of +5.3. This binary has an orbital period variously reported as 11 or 22 years. First discovered as an astrometric binary, the pair have now been resolved and visual orbits have been derived.

There are two visual companions, Iota Serpentis C, a 13th magnitude star 143 arcseconds away and Iota Serpentis D, a 12th magnitude star 151 arcseconds distant.

References

{{reflist|refs=

{{cite journal

| 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

| s2cid=18759600 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2076852 Vizier catalog entry]

{{cite journal

| last1=Martin | first1=C. | last2=Mignard | first2=F.

| last3=Hartkopf | first3=W. I. | last4=McAlister | first4=H. A.

| title=Mass determination of astrometric binaries with Hipparcos. III. New results for 28 systems

| display-authors=1 | journal=Astronomy and Astrophysics Supplement

| volume=133 | issue=2 | pages=149 | year=1998

| bibcode=1998A&AS..133..149M | doi=10.1051/aas:1998459 | doi-access=free }}

{{cite conference

| last=Evans | first=D. S. | date=June 20–24, 1966

| editor1-last=Batten | editor1-first=Alan Henry

| editor2-last=Heard | editor2-first=John Frederick

| contribution=The Revision of the General Catalogue of Radial Velocities

| title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30

| volume=30 | pages=57

| location=University of Toronto

| publisher=International Astronomical Union

| bibcode=1967IAUS...30...57E}}

{{citation

| title=XHIP: An extended hipparcos compilation

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

| journal=Astronomy Letters

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

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

| arxiv=1108.4971 | s2cid=119257644 | 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 }}

{{cite journal

| title=Note on the Double Star Iota Serpentis

| last1=van den Bos | first1=W. H.

| journal=Monthly Notes of the Astronomical Society of Southern Africa

| volume=24 | pages=123 | date=1965

| bibcode=1965MNSSA..24..123V }}

{{cite journal

| title=The Phases Differential Astrometry Data Archive. II. Updated Binary Star Orbits and a Long Period Eclipsing Binary

| last1=Muterspaugh | first1=Matthew W. | last2=Hartkopf | first2=William I.

| last3=Lane | first3=Benjamin F. | last4=O’Connell | first4=J.

| last5=Williamson | first5=M. | last6=Kulkarni | first6=S. R.

| last7=Konacki | first7=Maciej | last8=Burke | first8=Bernard F.

| last9=Colavita | first9=M. M. | last10=Shao | first10=M.

| last11=Wiktorowicz | first11=Sloane J. | display-authors=1

| journal=The Astronomical Journal

| volume=140 | issue=6 | pages=1623–1630 | year=2010

| arxiv=1010.4043 | bibcode=2010AJ....140.1623M

| doi=10.1088/0004-6256/140/6/1623 | s2cid=6030289 }}

}}

Category:A-type main-sequence stars

Category:Spectroscopic binaries

Category:Triple star systems

Category:Serpens

Serpentis, Iota

Category:Durchmusterung objects