Astrometrica object verification window-- the NEO 2017 BL30
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 6 - 60-second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
NOTE with only a five days data-arc span there is "little" known about the NEO 2017 BL30, and the information in this post may become outdated. So one should always check the links for updates. Whenever an object is listed on one the risk lists (especially if it has a Torino Scale 1 or greater) and it is observable, observers will take a particular interest in it. In the coming days, it is possible there will be more follow-up observations and a search in archives for precovery observations. It is MOST likely this object will be removed from the risk lists. It could take observations over one or more orbital periods before we can reliably say where it will be from 2029 to 2088
Why observe asteroids?
One of the purposes of observing an asteroid is to reduce the orbital uncertainty of the asteroid. Each observations records were in the sky the asteroid was seen from the given location at the given time. Given that an asteroid's orbit and position within its orbital path determines where in the sky the asteroid can be seen from a location at a given time, many observations over an extended period of time can significantly reduce the orbital uncertainty.
Each asteroid will be found somewhere within its uncertainty region. If the asteroid as a well-known orbit the uncertainty region will be tiny however if the asteroid as a poorly known orbit the uncertainty region will be enormous and may wrap around the solar system more than once. The question is will the "uncertainty region" of the asteroid and the Earth collide, and if so what is the percentage of the uncertainty region will be taken up by the Earth. The greater the percentage, the greater the risk of impact. As more observations come in the size of the uncertainty region will get smaller this may increase the proportion of the uncertainty region that will be taken up by the Earth. Therefore the "risk" may increase before dropping to zero.
To this end observers from around the world painstakingly take observations of asteroids on the risk lists. Each set of observations eliminates many possibilities(virtual asteroids) where the asteroid may be in the future. Most likely after more observations come all the virtual impactors will be eliminated and 2017 BL30 will be removed from the risk lists.
(as of 2017-02-03)
NOTE 99.93500000% chance 2017 BL30 will miss the Earth(i.e. NOT worry about it)
- Perihelion Distance: 0.862683125221094 (AU)
- Aphelion Distance: 1.404699667514954 (AU)
- Earth MOID: 9.67363E-5 AU ( 0.038 (LD)) or 8,992.201 miles (14,471.544 (KM))-- to put things in perspective "If" the Earth Was the Size of a Basketball this would be 10.65(27.06 CM)