Linked Questions
10 questions linked to/from Has a near earth object in heliocentric orbit ever been bright enough to be visible to the unaided eye?
21
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4
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Can you see something active in the sky apart from satellites? Can there be amateur time-domain astronomy?
What I mean is an event unfolding that is viewable by naked eye or telescopes, and doesn't take comparing days of footage to see moving pixels. Apart from satellites, is there something that moves or ...
7
votes
2
answers
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Will 3,600ft asteroid be visible at my location tonight?
According to NASA, a 1.1-kilometer asteroid called 7482 (1994 PC1) will be visible tonight at 5:50PM.
How do I know if this asteroid will be visible at my location with the naked eye? When NASA says 5:...
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9
votes
2
answers
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Calculating the apparent magnitude of a satellite
I'm writing a program that involves calculating the apparent magnitude of satellites from a ground location. I currently have the intrinsic magnitude of the satellites and the solar phase angle in ...
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3
votes
2
answers
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When would we detect a tiny meter size natural satellite in a geostationary orbits?
A natural, tiny (meters-size, maybe 10.000kg mass) natural satellite could be trapped in a geostationary orbit. I wondered for quite some time:
When and how are we able to detect these satellites?
I ...
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5
votes
1
answer
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Is there a distinction between NEOs and near-Earth asteroids? Is there a difference?
My "real question" is in Space Exploration Meta (neo (near-earth-object) and near-earth-asteroid tags, do we need both?), but I think that astronomers will be able to help understand the situation and ...
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5
votes
1
answer
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How big will Apophis appear?
How big will Apophis appear in the sky at its closest point of approach in 2029? Will it compare to the moon? How long will it linger as it passes?
5
votes
1
answer
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Has Hubble ever been used to try to image a near Earth asteroid?
This answer to How big will Apophis appear? points out that the near Earth asteroid Apophis will likely be close to 2 arcseconds in diameter as seen from Earth during its close approach in 2029. I ...
- 30.7k
2
votes
2
answers
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Is the passage of three asteroids near Earth today just coincidental?
I just saw in the advertisement-laden tabloid Express that three near-Earth astroids will pass the Earth today:
The first of the three, dubbed Asteroid 2018 TU4, will come as close as 0.03637 ...
- 30.7k
2
votes
1
answer
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What (actually) defines an Aten-class near-earth asteroid?
I just read in the EarthSky.org article Hours after discovery, asteroid swept by that the near earth asteroid 2016 QA2 recently passed the earth at about 85,000 km. The article says that it is a ...
- 30.7k
3
votes
3
answers
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Can we see asteroid 1998 OR2 with unaided eye?
Will I be able to see the asteroid 1998 OR2 with the naked eye on April 29?
If so, where can I find more information on when and where I'll be able to see it?
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