HD 40307: Verskil tussen weergawes

HD&nbsp;40307 is ’n K-tipe ster en straal dus oranje lig uit. Sy radius en massa is sowat ’n driekwart van die Son s’n. Sy temperatuur is net onder 5&nbsp;000 [[kelvin]]. Dit is relatief hoog vir ’n K-tipe ster en is naby dié van ’n G-tipe ster soos die Son.<ref>{{cite web |url=http://www.jb.man.ac.uk/distance/strobel/starprop/strpropd.htm|title=Properties of Stars |accessdate=27 November 2008 |work=Astronomy Notes|publisher=Jodrell Bank Centre for Astrophysics|year=2007|archiveurl = http://web.archive.org/web/20080622012045/http://www.jb.man.ac.uk/distance/strobel/starprop/strpropd.htm |archivedate = 22 Junie 2008|deadurl=yes}}</ref> Die sterrekundiges wat die planete om 40307 ontdek het, meen hul [[Metaal (astronomie)|metaalinhoud]] sal bepaal of hulle terrestriaal soos die Aarde of gasplanete soos [[Jupiter (planeet)|Jupiter]] en [[Saturnus]] is.<ref name="arXiv">{{cite journal|author= M. Mayor, S. Udry, C. Lovis, F. Pepe, D. Queloz, W. Benz, J.-L. Bertaux, F. Bouchy, C. Mordasini, D. Segransan|title=The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses)|journal=Submitted to Astronomy & Astrophysics|bibcode=2009A&A...493..639M|arxiv=0806.4587|doi=10.1051/0004-6361:200810451|year= 2009|volume= 493|issue= 2|pages= 639}}</ref>

 

 

== Planetêre stelsel ==

Vyf van HD&nbsp;40307 se planete wentel baie naby aan die ster,<ref name="tuomi12" /> met die verste een van hulle wat twee keer so naby is as [[Mercurius (planeet)|Mercurius]] aan die Son.<ref>{{cite web|title=Mercury Fact Sheet|url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html|publisher=Nasa Goddard Space Flight Center | date=30 November 2007 |accessdate=2008-11-12}}</ref> Die heel verste planeet is omtrent so ver as [[Venus (planeet)|Venus]] van die Son en val binne die gebied waar water kan voorkom.<ref name="tuomi12" />

 

 

{{Wentelkas begin

| table_ref = <ref name="tuomi12" />

}}

| exoplanet = b

| mass_earth = ≥ 4,0 {{±|0,8|0,7}}

| eccentricity = 0,20 {{±|0,16|0,14}}

}}

| exoplanet = c

| mass_earth = ≥ 6,6 {{±|1,1|1,0}}

| eccentricity = 0,06 {{±|0,06|0,11}}

}}

| exoplanet = d

| mass_earth = ≥ 9,5 {{±|1,7|1,5}}

| eccentricity = 0,07 {{±|0,11|0,07}}

}}

| exoplanet = e

| mass_earth = ≥ 3,5 ± 1,4

| eccentricity = 0,15 {{±|0,13|0,15}}

}}

| exoplanet = f

| mass_earth = ≥ 5,2 {{±|1,5|1,6}}

| eccentricity = 0,02 {{±|0,20|0,02}}

}}

| exoplanet = g

| mass_earth = ≥ 7,1 ± 2,6

{{CommonsKategorie-inlyn|HD 40307}}

 

 

{{Sterplanete}}