BG Indi

{{Short description|Star system}}

{{Starbox begin}}

{{Starbox image

| image = 250px

| caption = Light curves from TESS data for the two eclipsing binaries comprising BG Indi, adapted from Borkovits et al. (2021)

}}

{{Starbox observe

|constell=Indus

|epoch=J2000

|ra={{RA|21|58|30.04050}}{{cite DR2|6410494364389396992}}

|dec={{DEC|-59|00|43.4938}}

|appmag_v=6.141{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}} (6.11 - 6.36)

}}

{{Starbox character

|class=F3V

|variable=Algol

}}

{{Starbox astrometry

|radial_v=19.0 ± 0.5{{cite journal|bibcode=2007A&A...475..519H|doi=10.1051/0004-6361:20077221|arxiv=0707.1891|title=The Geneva-Copenhagen survey of the Solar neighbourhood II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk|journal=Astronomy and Astrophysics|volume=475|issue=2|pages=519|year=2007|last1=Holmberg|first1=J.|last2=Nordström|first2=B.|last3=Andersen|first3=J.|s2cid=119054949}}

|prop_mo_ra=24.729

|prop_mo_dec=15.315

|parallax=19.5917

|p_error=0.2028

|parallax_footnote=

|absmag_v=2.45 / 3.02 / 7.23 / 7.83

|absmag_bol=2.45 / 3.04 / 6.72 / 7.09

}}

{{Starbox orbit

|reference=

|primary=BG Ind A

|name=BG Ind B

|period={{val|720.9|+3.4|-3.1}} d

|axis_unitless={{solar radius|{{val|540.4|+2.7|−2.2}}}}

|eccentricity={{val|0.209|+0.028|−0.048}}

|periarg={{val|1.6|+9.2|−8.8}}

|inclination={{val|85.5|+3.1|−6.3}}

|periastron={{val|2458699|+14|−21}}

|k1={{val|12.57|+0.17|−0.24}}

|k2={{val|26.02|+0.31|−0.50}}

}}

{{Starbox orbit

|reference=

|primary=BG Ind Aa

|name=BG Ind Ab

|period=1.464065(2) d

|axis_unitless={{solar radius|{{val|7.602|+0.038|−0.043}}}}

|eccentricity=0

|inclination={{val|73.27|+0.06|−0.13}}

|periastron={{val|2458326.1362|+0.0011|−0.0012}}This refers to the epoch of primary transit.

|k1={{val|120.47|+1.12|−0.75}}

|k2={{val|130.99|+0.48|−0.50}}

}}

{{Starbox orbit

|reference=

|primary=BG Ind Ba

|name=BG Ind Bb

|period=0.528349(2) d

|axis_unitless={{solar radius|{{val|3.025|+0.011|−0.016}}}}

|eccentricity=0

|inclination={{val|84.29|+0.85|−0.87}}

|periastron={{val|2458325.8072|+0.0025|−0.0022}}

|k1={{val|138.98|+1.23|−1.39}}

|k2={{val|149.25|+1.09|−1.13}}

}}

{{Starbox detail

|source=

|component1=κ¹ Ind Aa

|mass={{val|1.432|+0.015|−0.024}}

|radius={{val|2.339|+0.016|−0.021}}

|temperature={{val|6442|+29|−28}}

|luminosity_bolometric={{val|8.433|+0.199|−0.169}}

|gravity={{val|3.852|+0.011|−0.005}}

|component2=κ¹ Ind Ab

|mass2={{val|1.315|+0.026|−0.023}}

|radius2={{val|1.592|+0.047|−0.019}}

|temperature2={{val|6816|26}}

|luminosity_bolometric2={{val|4.934|+0.279|−0.179}}

|gravity2={{val|4.150|+0.007|−0.016}}

}}

{{Starbox detail

|no_heading=y

|component1=κ¹ Ind Ba

|mass={{val|0.688|+0.008|−0.011}}

|radius={{val|0.642|+0.005|−0.007}}

|temperature={{val|4609|+48|−49}}

|luminosity_bolometric={{val|0.167|0.009}}

|gravity={{val|4.660|+0.003|−0.002}}

|component2=κ¹ Ind Bb

|mass2={{val|0.640|+0.010|−0.011}}

|radius2={{val|0.611|+0.008|−0.009}}

|temperature2={{val|4327|+62|−57}}

|luminosity_bolometric2={{val|0.118|0.009}}

|gravity2={{val|4.672|0.004}}

}}

{{Starbox catalog

|names={{odlist|B=κ¹ Ind|V=BG Ind|HD=208496|CD=-59°7830|FK5=3752|HIP=108478|HR=8369|SAO=247247}}{{cite simbad|title=* kap01 Ind|accessdate=2021-07-17}}

}}

{{Starbox reference

|Simbad=kap01+Ind

}}

{{Starbox end}}

BG Indi, also known as κ¹ Indi (Kappa¹ Indi) is a multiple star system in the southern constellation of Indus. Its average apparent magnitude is 6.141, meaning it can only be seen by the naked eye under exceptionally good viewing conditions. Stellar parallax measurements by Gaia put the system at about 166 light-years (51 parsecs) away.