The current Rosetta mission to Comet 67P/ Churyumov-Gerasimenko, is remarkable for this reason: It is the first probe using gravity assists to a target that itself has undergone gravity assists, in this case from Jupiter. Ten years before discovery in 1969, the 1959 Jovian encounter reduced cometary perihelion (closest point to Sun) to 1.29 AU close enough for conspicuous and outgassing which helped it’s discovery in 1969. Decades later, the European Space Agency built and launched the Rosetta probe with multiple gravity assists to reach a target which itself had undergone multiple encounters with Jupiter.
More details on this page http://sci.esa.int/rosetta/14615-comet-67p/
Quote: Comet 67P is classed as a dusty comet, with a dust to gas emission ratio of approximately 2:1. The peak dust production rate in 2002/03 was estimated at approximately 60 kg per second, although values as high as 220 kg per second were reported in 1982/83.
Comet 67P/Churyumov-Gerasimenko
Diameter of nucleus – estimated (km)
3 × 5
Rotation period (hours)
~12.4
Orbital period (years)
6.45
Perihelion distance from Sun (million km)
186 (1.243 AU)
Aphelion distance from Sun (million km)
849.7 (5.68 AU)
Orbital eccentricity
0.640
Orbital inclination (degrees)
7.04
Year of discovery
1969
Discoverers
Klim Churyumov &
Svetlana Gerasimenko
Jets are now visible at the ‘wasp waist’ of the nucleus– coverage here
Joseph Friedlander is a thinker in the pattern of Herman Kahn or David South, who takes a theoretical construct and reduces it to detailed scenarios for action, with an emphasis on the immediately achievable and the practical that can be settled for in the very near term as a foundation for greater achievements later on.
Joseph has a degree in business, certificates in computer aided design, tool and die work, information science, and other technical areas and wide background familiarity with astrophysics and chemistry.
His reading is wide-ranging (some would say encyclopedic). Among his favorite authors are those who concentrate on the links between industry, government and military, society and prosperity, in particular Jane Jacobs, Seymour Melman, Herman Kahn, and Kevin A. Carson.
Joseph is an inventor and consultant who writes and speaks often on space industrialization and settlement as well as future industrial possibilities on Earth and the ways these things could change our lives. He is a member of the World Economics Association.
The current Rosetta mission to Comet 67P/ Churyumov-Gerasimenko, is remarkable for this reason: It is the first probe using gravity assists to a target that itself has undergone gravity assists, in this case from Jupiter. Ten years before discovery in 1969, the 1959 Jovian encounter reduced cometary perihelion (closest point to Sun) to 1.29 AU close enough for conspicuous and outgassing which helped it’s discovery in 1969. Decades later, the European Space Agency built and launched the Rosetta probe with multiple gravity assists to reach a target which itself had undergone multiple encounters with Jupiter.
More details on this page http://sci.esa.int/rosetta/14615-comet-67p/
Quote: Comet 67P is classed as a dusty comet, with a dust to gas emission ratio of approximately 2:1. The peak dust production rate in 2002/03 was estimated at approximately 60 kg per second, although values as high as 220 kg per second were reported in 1982/83.
Comet 67P/Churyumov-Gerasimenko
Diameter of nucleus – estimated (km)
3 × 5
Rotation period (hours)
~12.4
Orbital period (years)
6.45
Perihelion distance from Sun (million km)
186 (1.243 AU)
Aphelion distance from Sun (million km)
849.7 (5.68 AU)
Orbital eccentricity
0.640
Orbital inclination (degrees)
7.04
Year of discovery
1969
Discoverers
Klim Churyumov &
Svetlana Gerasimenko
Jets are now visible at the ‘wasp waist’ of the nucleus– coverage here
Joseph Friedlander is a thinker in the pattern of Herman Kahn or David South, who takes a theoretical construct and reduces it to detailed scenarios for action, with an emphasis on the immediately achievable and the practical that can be settled for in the very near term as a foundation for greater achievements later on.
Joseph has a degree in business, certificates in computer aided design, tool and die work, information science, and other technical areas and wide background familiarity with astrophysics and chemistry.
His reading is wide-ranging (some would say encyclopedic). Among his favorite authors are those who concentrate on the links between industry, government and military, society and prosperity, in particular Jane Jacobs, Seymour Melman, Herman Kahn, and Kevin A. Carson.
Joseph is an inventor and consultant who writes and speaks often on space industrialization and settlement as well as future industrial possibilities on Earth and the ways these things could change our lives. He is a member of the World Economics Association.