Questions tagged [ballistics]

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2answers
154 views

Terminology dispute: is an orbital flight still a ballistic flight?

We have a terminology dispute with a colleague: could a flight by elliptical orbit trajectory be called a ballistic flight as well or limits of the later is a parabolic trajectory of a suborbital ...
2
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1answer
151 views

Ballistic missile typical trajectory - along which path is it supposed to travel between Russia, China and US?

Today I was puzzled when my son was holding a school globe asking me to show with my finger a trajectory of a (nuclear) ballistic missile flying from US to China and Russia and vice versa (from Russia ...
2
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0answers
83 views

Simplified WGS84 or EGM2008 model for rapid computations?

I am searching for a simplified model of EGM2008 that can be used for rapid, repetitive computations. It needs to be valid only up to GPS altitudes. I'm thinking such a model already exists but cannot ...
10
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2answers
1k views

Range of BFR as single stage

The depictions of the BFR for earth to earth travel include the 1st stage booster. I would think if you are just going ballistic, the upper stage would have enough delta V to go it alone, for closer ...
5
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0answers
142 views

How to calculate if a co-location intercept is possible in a ballistic counter-battery scenario

Let us presume that we have a scenario with ballistic objects. As an example, one object $m_1$ is launched at time $t_0$ from Earth Location $a$ towards Earth Location $b$, both of which are in the ...
0
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1answer
161 views

Help me build a space shotgun so I can shoot Venus from Jupiter

If one wants to move an object from orbit around one planet in the solar system and have it collide with another, what information is needed, and how would one go about calculating such a thing? For ...
2
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1answer
295 views

What is a Michielsen chart and how should one use it?

I've read about a Michielsen chart, but cannot currently find Kaplan's 1976 book. What is this chart? Is it outdated nowadays?
11
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1answer
817 views

How can you rendezvous with the ISS via the “Soyuz scheme” without a computer and out of ground contact?

Let's assume the flight rules don't prohibit you from going to the ISS in a malfunctioning craft and don't force you to land on next orbit, unlike the real life ones. Let's also assume you have an ...
7
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1answer
216 views

Regulation governing the use of ocean areas for the return of space objects?

What are the rules governing international use of water areas to dump used spacecrafts from orbit or launch trajectory. (source: Wikipedia / Nasa) This would apply to rocket stages, boosters, tanks, ...
5
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2answers
2k views

Center of mass location on any popular rocket in any typical condition?

Where can I find the location of the center of gravity (CoG) of any rocket? I need any popular rocket, such as the Soyuz or Space Shuttle, in any typical condition, like fully fueled on the pad. ...
2
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2answers
1k views

Transformation from Earth-centered inertial (ECI) to Geocentric (GEOC) satellite coordinates

I'm trying to follow the definition for converting Earth-centred inertial (ECI) coordinates (as output by SGP4) to Geocentric (GEOC) for later computation from this reference: Coordinate Systems for ...
6
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2answers
920 views

What altitude would an ocean crossing sub-orbital flight need to reach?

So, let's save some travel time and throw a spaceship, rather than an airplane, across the Atlantic or Pacific ocean on a ballistic trajectory. How high would it have to go? How high do the doomsday ...
5
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1answer
334 views

Are L1 to L2 and back “cheap” transfers/cyclers possible?

This paper studies transfers from halo orbit to halo orbit in the Jovian system. I wonder if there are any locally stable orbits connecting Earth-Moon L1 and L2 points. EDIT: One should also consider ...
9
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2answers
5k views

What would happen if I throw a grenade in space?

What would happen if I throw a grenade in space? Would it explode? Or will it just keep floating forever?
4
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3answers
428 views

Lunar sub-orbital trajectories

How do you determine (what is the formula?) the delta-V for a sub-orbital 'hop' from one location on the Moon to another? Is it different from a typical orbital calculation?
4
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1answer
207 views

What use could be getting to space just for a bit?

I asked a question about reaching space using non-rocket aircrafts on aviation.se and I found out that it may be possible to reach the space for a short moment and then a normal aircraft designed to ...
7
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1answer
137 views

Conjunction analysis for deep space missions

How rigorously is conjunction analysis (finding out the chances of hitting an asteroid or another known object) conducted for missions beyond Earth orbit? Due to larger computational resources ...