사용자:이강철/번역1
From Wikipedia, the free encyclopedia
2I/Borisov, originally designated C/2019 Q4 (Borisov),[7][12] is the first observed interstellar comet and the second observed interstellar interloper after ʻOumuamua.[13][14][15] 2I/Borisov has a heliocentric orbital eccentricity of 3.36 and is not bound to the Sun. The comet passed through the ecliptic of the Solar System at the end of October 2019, and made its closest approach to the Sun at just over 2 AU on 8 December 2019.[3][16][17] In November 2019, astronomers from Yale University noted that the comet (including coma and tail), was "14 times the size of Earth", presented an image comparing the comet size with the size of planet Earth [...] and stated, “It’s humbling to realize how small Earth is next to this visitor from another solar system.”[18]
2I/보리소프 | ||
![]() 2019년 10월 촬영된 보리소프[lower-alpha 2] | ||
발견 | ||
---|---|---|
발견자 | 게나디 보리소프 | |
발견일 | 2019년 8월 30일 | |
궤도 성질 (역기점 20 December 2019[3]) | ||
궤도 긴반지름(a) | −0.8512±0.0002 au[lower-alpha 3] | |
근일점(q) | 2.00664±0.00004 au | |
지구와의 MOID | 1.09244 au | |
목성과의 MOID | 2.38974 au | |
궤도 경사(i) | 44.0530°±0.0006° | |
궤도 이심률(e) | 3.3573±0.0004 (JPL) 3.357 (MPC)[4] | |
승교점 경도(Ω) | 308.1498°±0.0004° | |
근일점 편각(ω) | 209.1242°±0.0019° | |
물리적 성질 | ||
지름 | ≈2 km[5][6][7] 1.4–6.6 km[8] 450–550 m[5] (for an albedo of 0.04) ≈2–16 km[9] 1.5 km[10] | |
근일점 근접일 | ||
최근 접근날짜 | 2019년 12월 8일[3][4][11] |