Radar Reveals Two Moons Orbiting Giant Asteroid Florence
Radar Reveals Two Moons Orbiting Giant Asteroid Florence
Potentially Hazardous Asteroid “Florence” passes by – captured with amateur telescope
I wonder if the universe has a object going around it?
Tau.Neutrino said:
I wonder if the universe has a object going around it?
It’s universes all the way up.
The Rev Dodgson said:
Tau.Neutrino said:
I wonder if the universe has a object going around it?It’s universes all the way up.
A brane?
A boltzmann brain “seeing stars”?
Tau.Neutrino said:
Radar Reveals Two Moons Orbiting Giant Asteroid Florence
Radar Reveals Two Moons Orbiting Giant Asteroid Florence
Potentially Hazardous Asteroid “Florence” passes by – captured with amateur telescope
Good work. Distance .049 AU was close enough to the Goldstone radar to work. What’s the greatest distance it works at?
Is this only the second asteroid known to have a moon? After Ida with moon Dactyl.
Conversation with miss m
Me: “Two new moons have just been discovered”
Her: “Where?”
Me: “Florence”
Her: – pulls face.
> Is this only the second asteroid known to have a moon? After Ida with moon Dactyl.
No. There are more.
243 Ida has moon Dactyl
87 Sylvia has moons Romulus and Remus,
22 Kalliope has moon Linus,
45 Eugenia has moons Petit-Prince and S/2004 (45) 1
216 Kleopatra has moons Alexhelios and Cleoselene
With names Florence, Ida, Sylvia, Eugenia and Cleopatra it’s starting to sound like a country women’s association meeting.
Or a collection of tropical cyclones.
> Good work. Distance .049 AU was close enough to the Goldstone radar to work. What’s the greatest distance it works at?
This distance. So for Florence at 4.5 km diameter and distance 0.049 AU, the signal to noise ratio is about 2000. For its moons the signal to noise ratio is about 20.
mollwollfumble said:
> Is this only the second asteroid known to have a moon? After Ida with moon Dactyl.No. There are more.
243 Ida has moon Dactyl
87 Sylvia has moons Romulus and Remus,
22 Kalliope has moon Linus,
45 Eugenia has moons Petit-Prince and S/2004 (45) 1
216 Kleopatra has moons Alexhelios and CleoseleneWith names Florence, Ida, Sylvia, Eugenia and Cleopatra it’s starting to sound like a country women’s association meeting.
Or a collection of tropical cyclones.
Not sure about the difference between an asteroid binary and an asteroid moon. Binary asteroids are remarkably common, including “contact binaries”. It was discovered in 2002 that about 15% of Near Earth Asteroids >200 metres in diameter are binaries. https://echo.jpl.nasa.gov/asteroids/asteroid_radar_highlights.txt
eg. This is counted as a binary asteroid rather than a moon
https://www.youtube.com/watch?v=uzdSohd_xPY
“Radar Reveals Two Moons Orbiting Giant Asteroid Florence”
I hardly think an asteroid 5 km across counts as “giant”
dv said:
“Radar Reveals Two Moons Orbiting Giant Asteroid Florence”I hardly think an asteroid 5 km across counts as “giant”
I wonder what the average sized asteroid is?
Tau.Neutrino said:
dv said:
“Radar Reveals Two Moons Orbiting Giant Asteroid Florence”I hardly think an asteroid 5 km across counts as “giant”
I wonder what the average sized asteroid is?
Smaller than 5 km, but given that the largest asteroid is about 1000 km across, and even the 100th largest is more than 100 km across, Florence won’t seem giant.
I mean a possum is bigger than most mammals but it’s still not a giant mammal.
I got called on my mobile by Medicins sans Frontiers and they pitched me their charity deal and I signed up for a monthly amount. All good but I am concerned a bit because I was looking at their website a couple of days ago. Just seems too much of a coincidence, so IDK maybe Google sells them their hit list or something.
dv said:
I got called on my mobile by Medicins sans Frontiers and they pitched me their charity deal and I signed up for a monthly amount. All good but I am concerned a bit because I was looking at their website a couple of days ago. Just seems too much of a coincidence, so IDK maybe Google sells them their hit list or something.
Buckle up, now that you have given money to a charity you are on everyone’s hit list, your details are being sold.
I didn’t mean to post this in “Florence” but I’ll just pretend it was because of the Nightingale connection
dv said:
I didn’t mean to post this in “Florence” but I’ll just pretend it was because of the Nightingale connection
It would be an amazing asteroid if it was shaped like Florence Nightingale.
Tau.Neutrino said:
dv said:
I didn’t mean to post this in “Florence” but I’ll just pretend it was because of the Nightingale connection
It would be an amazing asteroid if it was shaped like Florence Nightingale.
I wonder who will be the first space artist to shape and sculpture an asteroid ?
dv said:
Tau.Neutrino said:
dv said:
“Radar Reveals Two Moons Orbiting Giant Asteroid Florence”I hardly think an asteroid 5 km across counts as “giant”
I wonder what the average sized asteroid is?
Smaller than 5 km, but given that the largest asteroid is about 1000 km across, and even the 100th largest is more than 100 km across, Florence won’t seem giant.
I mean a possum is bigger than most mammals but it’s still not a giant mammal.
Bot Florence is a near-earth asteroid. For an object that comes as close as 0.049 AU from Earth, Florence is big.
I wonder. Check http://www.minorplanetcenter.net/iau/lists/Closest.html Insufficient information. At 5 km that’s a magnitude H somewhere near 13.5. The biggest asteroid to come within 0.01 AU from Earth has H = 16.0, which corresponds to just 2 km diameter.
So Florence is a giant compared to all asteroids than have been observed to come within 0.01 AU of Earth.
Near earth asteroids are Atens, Apollos or Amors.
Florence is bigger than all 1191 Aten asteroids.
Among the 6144 Amor asteroids, the best known are
3908 Nyx 1-2 km diameter
1221 Amor 1 km diameter
1036 Ganymed 32-34 km diameter
887 Alinda 4 km diameter
719 Albert 2.4 km diameter
433 Eros 17 km diameter
Florence is an Amor asteroid. Does being possibly third largest out of 6144 Amor asteroids make it a “giant”?
There are 8837 Apollo asteroids. The largest known Apollo asteroid is 1866 Sisyphus, with a diameter of of 8.5 km.