HD 98618
Encyclopedia
HD 98618 is a star
126 light years
from Earth
that is almost identical in most respects to the sun
; it has therefore been proposed as a candidate solar twin. However, like the solar twin 18 Scorpii
, HD 98618 has a lithium
abundance significantly higher than that of the Sun ([Li/H] = +0.45 ± 0.08). 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.
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
126 light years
Light Years
Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....
from Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
that is almost identical in most respects to the sun
Sun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...
; it has therefore been proposed as a candidate solar twin. However, like the solar twin 18 Scorpii
18 Scorpii
18 Scorpii is a star located some 45.3 light years from Earth at the northern edge of the Scorpius constellation.18 Scorpii has many physical properties in common with the Sun. Cayrel de Strobel included it in her review of the stars most similar to the Sun, and Porto de Mello & da Silva ...
, HD 98618 has a lithium
Lithium
Lithium is a soft, silver-white metal that belongs to the alkali metal group of chemical elements. It is represented by the symbol Li, and it has the atomic number 3. Under standard conditions it is the lightest metal and the least dense solid element. Like all alkali metals, lithium is highly...
abundance significantly higher than that of the Sun ([Li/H] = +0.45 ± 0.08). Meléndez & Ramírez (2007) have suggested that HD 98618 be considered a "quasi solar twin", since they have now identified a solar twin, HIP 56948
HIP 56948
HIP 56948 is a solar twin star of type G5V, which as of March 2011, is the most sun-like star yet discovered in terms of size, mass, temperature, chemical makeup and, arguably, age...
, with lithium content identical within the observational error to the Sun's.