6 ms·
A golf ball is around 4cm, and an arm's length is around 70cm. To be the same apparent size, it would have to maintain that same ratio. The atmosphere is like 5
by lamacase 4y ago
A golf ball is around 4cm, and an arm's length is around 70cm. To be the same apparent size, it would have to maintain that same ratio. The atmosphere is like 50-100km thick (highest weather balloon flight was >50km) so you would have to be seeing it at a further distance than that.
So your asteroid would have to be at least several kilometers across. That approaching dino-killer size. You're definitely misremembering some part of this.
- wrycoder 4y agoIt's not impossible. How closely were we tracking 3 km objects in 1983?
- deleted 4y ago[deleted]
- zardo 4y agoThe US and USSR were looking very closely for much smaller objects leaving and entering the atmosphere.
- wrycoder 4y agoTrue, but are they finding them - especially the ones on the sun side of our orbit? Remember, this one was found by an amateur. Now, NASA is claiming authority for it.