106 Herculis

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

{{Starbox image

| image = 250px

| caption = A light curve for 106 Herculis, plotted from TESS data

}}

{{Starbox observe

| epoch = J2000

| constell = Hercules

| ra = {{RA|18|20|17.91482}}

| dec = {{DEC|+21|57|40.6622}}

| appmag_v = 4.96

}}

{{Starbox character

| type =

| class = M0 III

| b-v = +1.58

| u-b = +1.98

| variable = suspected SR

}}

{{Starbox astrometry

| radial_v = {{Val|-35.20|0.29}}

| prop_mo_ra = +18.105

| prop_mo_dec = -59.631

| parallax = 8.5067

| p_error = 0.1739

| parallax_footnote =

| absmag_v = −0.664

}}

{{Starbox detail

| source=

| mass =

| radius = {{Val|44.32|2.70|5.89}}

| temperature = {{Val|3789|6|fmt=commas}}

| luminosity = {{Val|414.1|9.7}}

| gravity = {{Val|1.56|0.09}}

| metal_fe = {{Val|0.00|0.03}}

| rotational_velocity = {{Val|5.0|1.0}}

| age_gyr =

}}

{{Starbox catalog

| names = {{odlist | F=106 Her | BD=+21°3390 | HD=168720 | HIP=89861 | HR=6868 | SAO=85941 | NSV=24405 }}

}}

{{Starbox reference

| Simbad=106+Her

}}

106 Herculis is a variable star in the northern constellation Hercules. It is visible to the naked eye as a faint, red-hued point of light with a baseline apparent visual magnitude of 4.96. Based on its parallax, it is estimated to lie {{Convert|383|ly|pc|abbr=off}} away from the Sun. The star is moving closer to the Earth with a heliocentric radial velocity of -35 km/s.

Eggleton and Tokovinin (2008) listed this as a suspected binary star system consisting of two roughly equal components. It appears as an ageing red giant with a stellar classification of M0III. This is a suspected semiregular variable star with a very small amplitude and a period of 40 days or more. Having exhausted the supply of hydrogen at its core, it has expanded to 44 times the Sun's radius. It is radiating around 414 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of about 3,789 K.

References

{{reflist|refs=

{{cite web

| title=MAST: Barbara A. Mikulski Archive for Space Telescopes

| url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html

| publisher=Space Telescope Science Institute | access-date=27 November 2023}}

{{cite journal|bibcode=1993PASP..105.1422P|doi=10.1086/133324|title=The photometric variability of K giants|journal=Publications of the Astronomical Society of the Pacific|volume=105|pages=1422|year=1993|last1=Percy|first1=John R.|doi-access=free}}

{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|pages=B/gcvs|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}

{{cite journal

| first1=Ducati | last1=J. R.

| title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system

| journal=CDS/ADC Collection of Electronic Catalogues

| volume=2237 | year=2002 | bibcode=2002yCat.2237....0D }}

{{cite journal

| last1=Mermilliod | first1=J.-C.

| title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)

| journal=Catalogue of Eggen's UBV Data

| date=1986 | bibcode= 1986EgUBV........0M }}

{{cite journal

| last1=Soubiran | first1=C. | last2=Bienaymé | first2=O.

| last3=Mishenina | first3=T. V. | last4=Kovtyukh | first4=V. V.

| title=Vertical distribution of Galactic disk stars

| journal=Astronomy & Astrophysics

| volume=480 | pages=91–101 | year=2008

| issue=1 | bibcode=2008A&A...480...91S | arxiv=0712.1370

| doi=10.1051/0004-6361:20078788 | s2cid=16602121 }}

{{cite journal

| display-authors=1 | last1=Wu | first1=Yue

| last2=Singh | first2=H. P. | last3=Prugniel | first3=P.

| last4=Gupta | first4=R. | last5=Koleva | first5=M.

| title=Coudé-feed stellar spectral library – atmospheric parameters

| journal=Astronomy & Astrophysics

| volume=525 | pages=A71 | year=2010

| bibcode=2011A&A...525A..71W | arxiv=1009.1491

| doi=10.1051/0004-6361/201015014 | s2cid=53480665 }}

{{cite journal

| 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

| arxiv=0806.2878 | s2cid=14878976 }}

{{cite journal | display-authors=1

| title=Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics

| last1=Zamanov | first1=R. K. | last2=Bode | first2=M. F.

| last3=Melo | first3=C. H. F. | last4=Stateva | first4=I. K.

| last5=Bachev | first5=R. | last6=Gomboc | first6=A.

| last7=Konstantinova-Antova | first7=R. | last8=Stoyanov | first8=K. A.

| journal=Monthly Notices of the Royal Astronomical Society

| volume=390 | issue=1 | pages=377–382 | date=October 2008

| doi=10.1111/j.1365-2966.2008.13751.x | doi-access=free

| bibcode=2008MNRAS.390..377Z

| arxiv=0807.3817 | s2cid=118697261

}}

Category:M-type giants

Category:Semiregular variable stars

Category:Hercules (constellation)

Category:Durchmusterung objects

Category:Suspected variables