Fastest Spacecraft Ever?!?, Which one is it? |
Fastest Spacecraft Ever?!?, Which one is it? |
Jan 24 2006, 08:43 AM
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Member Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384 |
There was statement that recently launched New Horizons is the fastest spacecraft to leave Earth. The velocity was 16.2 km/s relative to the Earth according to "Jonathan's Space Report".
QUOTE After the Star 48B burn, the payload had reached escape velocity not only with respect to the Earth but also relative to the Sun (The velocity was 16.2 km/s relative to the Earth and I estimate an asymptotic velocity of 12.3 km/s, corresponding to 42.6 km/s relative to the Sun... So: New Horizons is fastest to leave Earth at 16.2 km/s (relative to Earth). Voyager-1 is fastest to leave Solar System at 17.374 km/s (relative to Sun). Now that is OK. but what is this? Today's "Astronomy Picture of the Day" features launch of New Horizons and in text bellow image is one particularly interesting link to "Guinness world of records"... Guinness world of records; There "Mr. Guinness" claims that the fastest spacecrafts ever, were two Solar probes "Helios 1&2"...According to him those spacecrafts had speed of 252,800 km/h which is staggering 70.2 km/s...BUT RELATIVE TO WHAT????? Can somebody explain this? -------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
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Jan 24 2006, 03:57 PM
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
Ulysses still holds as the fastest escape velocity from Earth: 15.17 km/sec versus to NH 12.3 km/sec relative to Earth.
Fastest Earth Departure Speed The fastest escape velocity from Earth was 54,614 km/h (34,134 mph), achieved by the ESA Ulysses spacecraft after deployment from the Space Shuttle Discovery on October 7, 1990. It was en route to an orbit around the poles of the Sun via a fly-by of Jupiter. Record Guiness Ulysses was launched by the Space Shuttle Discovery on 6 October 1990 at 11:47:15 UTC. The Payload Assist Module (PAM-S) which propelled Ulysses away from the Earth toward Jupiter. Rodolfo |
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Jan 24 2006, 06:23 PM
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#3
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Member Group: Members Posts: 532 Joined: 19-February 05 Member No.: 173 |
QUOTE (RNeuhaus @ Jan 24 2006, 03:57 PM) Ulysses still holds as the fastest escape velocity from Earth: 15.17 km/sec versus to NH 12.3 km/sec relative to Earth. Fastest Earth Departure Speed The fastest escape velocity from Earth was 54,614 km/h (34,134 mph), achieved by the ESA Ulysses spacecraft after deployment from the Space Shuttle Discovery on October 7, 1990. It was en route to an orbit around the poles of the Sun via a fly-by of Jupiter. Record Guiness Ulysses was launched by the Space Shuttle Discovery on 6 October 1990 at 11:47:15 UTC. The Payload Assist Module (PAM-S) which propelled Ulysses away from the Earth toward Jupiter. Rodolfo NH left Earth at 16.2 km/sec. |
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