1627 Ivar
Encyclopedia
1627 Ivar is a large Mars-crosser asteroid
that was discovered in 1929 by Ejnar Hertzsprung
at the Union Observatory
in Johannesburg
, South Africa
. Although it does not cross Earth's orbit, during 1900-2100 it comes closer to the Earth
with its 2074 pass at 21.1 Gm (0.141 AU) than it does to Mars
(22.5 Gm or 0.150 AU in 1975).
Mars-crosser asteroid
A Mars-crosser is an asteroid whose orbit crosses that of Mars. The known numbered Mars-crossers are listed here. They include the two numbered Mars trojans 5261 Eureka and ....
that was discovered in 1929 by Ejnar Hertzsprung
Ejnar Hertzsprung
Ejnar Hertzsprung was a Danish chemist and astronomer.Hertzsprung was born in Copenhagen. In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram....
at the Union Observatory
Union Observatory
Union Observatory was an astronomical observatory located in the suburb Observatory, Johannesburg, South Africa. It bears IAU code 078.Known as the Transvaal Observatory in its early years, it became the Republic Observatory in 1961...
in Johannesburg
Johannesburg
Johannesburg also known as Jozi, Jo'burg or Egoli, is the largest city in South Africa, by population. Johannesburg is the provincial capital of Gauteng, the wealthiest province in South Africa, having the largest economy of any metropolitan region in Sub-Saharan Africa...
, South Africa
South Africa
The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...
. Although it does not cross Earth's orbit, during 1900-2100 it comes closer to the 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...
with its 2074 pass at 21.1 Gm (0.141 AU) than it does to Mars
Mars
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...
(22.5 Gm or 0.150 AU in 1975).