- HD 98618
Starbox begin
name = HD 98618Starbox observe
epoch =J2000.0
constell =Ursa Major
ra = 11h 21m 29s
dec = +58° 53′ 18″
appmag_v = 7.66Starbox character
class = G5V
b-v = 0.642
u-b = ?
variable = noneStarbox astrometry
radial_v = 16
prop_mo_ra = 41.28
prop_mo_dec = 29.19
parallax = 25.82
p_error = 0.86
dist_ly = 126
dist_pc = 38.7
absmag_v = 4.74 ± 0.07Starbox detail
mass = 1.02±0.03
radius = 1.00
luminosity = 1.06 ± 0.05
temperature = 5843 ± 30
metal = 1.05 sol
rotation = 24 days
age= 4210 ± 900 millionStarbox catalog
names=BD +59°1369, HIP 55459HD 98618 is a
star 126light years fromEarth that is almost identical in most respects to thesun ; it has therefore been proposed as a candidatesolar twin .cite journal | author = Meléndez, J., & Dodds-Eden, K., & Robles, J. A. | date = 2006 | title = HD 98618: A Star Closely Resembling Our Sun | journal =The Astrophysical Journal | volume =641 | issue = 2 | pages = L133–L136 | doi = 10.1086/503898 ] However, like the solar twin18 Scorpii , HD 98618 has alithium abundance significantly higher than that of the Sun ( [Li/H] = +0.45 ± 0.08).cite journal | author = Meléndez, J., & Ramírez, I. | date = 2007 | title = HIP 56948: A Solar Twin with a Low Lithium Abundance | journal =The Astrophysical Journal | volume =669 | issue = 2 | pages = L89–L92 | doi = 10.1086/523942 ] Meléndez & Ramírez (2007) have suggested that HD 98618 be considered a "quasi solar twin", since they have now identified a solar twin, HIP 56948, with lithium content identical within the observational error to the Sun's.References
ee also
*
Solar twin
*18 Scorpii External links
* [http://www.universetoday.com/am/publish/nearby_twin_sun.html?2432006 Universetoday.com article]
* [http://www.daviddarling.info/encyclopedia/H/HD_98618.html David Darling encyclopedia]
* [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=HD+98618 SIMBAD entry]
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