First Interstellar Asteroid Spotted

Notebook

Addon Developer
Addon Developer
News Reporter
Donator
Joined
Nov 20, 2007
Messages
11,727
Reaction score
586
Points
188
Wouldn't it be fun if it had a look at the Solar System, and decided the next one was better?
Bet I can get to the next one before the fuel runs out....

N.
 

Andy44

owner: Oil Creek Astronautix
Addon Developer
Joined
Nov 22, 2007
Messages
7,620
Reaction score
6
Points
113
Location
In the Mid-Atlantic states
Wouldn't it be fun if it had a look at the Solar System, and decided the next one was better?
Bet I can get to the next one before the fuel runs out....

N.

Rama was using Sol for a slingshot gravity assist in the novel.

The fact that this thing is "highly elongated" and not the usual semi-spherical or potato-shaped object makes it weird. I wonder how many heliocentric asteroids or other bodies match this description.
 

Urwumpe

Not funny anymore
Addon Developer
Donator
Joined
Feb 6, 2008
Messages
36,996
Reaction score
1,678
Points
203
Location
Langendernbach
400 m long, metallic, no ice, not surrounded by dust.

This one is REALLY strange. I wonder what it will do on perihelion.

EDIT: Ah, no, already passed perihelion in September without solar orbit insertion.
 
Last edited:

perseus

Addon Developer
Addon Developer
Joined
May 31, 2008
Messages
316
Reaction score
1
Points
18
The terrestrial telescopes have not been able to see directly the shape of this small body due to its remoteness, but if you ask how we know its approximate shape, it is easy: in the same way that it is estimated with most asteroids, that is, seeing its light curve.

Oumuamua has a rotation period of 7.34 hours, a value that is not uncommon in asteroids of this size, but the high contrast of the light curve implies a very elongated shape or a dramatic albedo difference. Occam's razor makes astronomers opt for the first option, since it is easier to explain a homogeneous surface composition, although evidently the light curve could be the result of both factors. In any case, we must insist that we do not know the true form of Oumuamua and we can only work with estimates. Of course, if it really is a kind of very long cosmic splinter, it would have to be formed predominantly by rock and metal in order to withstand the structural tensions.
interstellar-asteroid.jpg


Oumuamua has a rotation period of 7.34 hours, a value that is not uncommon in asteroids of this size, but the high contrast of the light curve implies a very elongated shape or a dramatic albedo difference. Occam's razor makes astronomers opt for the first option, since it is easier to explain a homogeneous surface composition, although evidently the light curve could be the result of both factors. In any case, we must insist that we do not know the true form of Oumuamua and we can only work with estimates. Of course, if it really is a kind of very long cosmic splinter, it would have to be formed predominantly by rock and metal in order to withstand the structural tensions.

The VLT together with the Hawaii CFHT telescope (Canada-France-Hawaii Telescope) have provided fundamental information about the nature of this visitor to the stars. The first and most important thing is that its interstellar nature is confirmed. The'Omuuamua orbit - which in Hawaiian means 'messenger that comes from afar and arrives first' - has an eccentricity of 1.188 with a very high statistical confidence (300σ). Second, neither the VLT nor the CFHT, nor the GST (Gemini South Telescope), have been able to detect a comma around the body despite its enormous resolution, so it is also confirmed the absence of volatiles -hols- in the surface of Oumuamua. That is, it is a body rich in rocks and metals

Apocalipsismo.jpg

We are free, this time, from visits of a heavy visit at home
 
Last edited:

Urwumpe

Not funny anymore
Addon Developer
Donator
Joined
Feb 6, 2008
Messages
36,996
Reaction score
1,678
Points
203
Location
Langendernbach
Yeah, I figured.

And this is one of the things the US does correct, IMO. A decimal point should be a decimal point not a decimal comma! :tiphat:

Which is a hen and egg problem. What was first point or decimal point?
 

jedidia

shoemaker without legs
Addon Developer
Joined
Mar 19, 2008
Messages
10,394
Reaction score
1,639
Points
203
Location
between the planets
And this is one of the things the US does correct, IMO. A decimal point should be a decimal point not a decimal comma!

And it never occured to you that in other languages it might not be called a point, but a comma? :lol:
 

Topper

Addon Developer
Addon Developer
Donator
Joined
Mar 28, 2008
Messages
653
Reaction score
10
Points
33
The . is that it's not the . if it's a , or a .. :lol:
 
Top