The NEO 2020 NK1 Has Been Rated Torino Impact Hazard Scale 1 -- Normal (Green Zone)

The NEO 2020 NK1 Has Been Rated Torino Impact Hazard Scale 1 this happens a few times a year. The current Torino Scale state for 1 " A routine discovery in which a pass near Earth is predicted, that poses no unusual level of danger. Current calculations show the chance of collision is extremely unlikely with no cause for public attention or public concern. New telescopic observations very likely will lead to reassignment to Level 0."  2020 NK1 just need more observations.

Artist's concept of a near-Earth object. Image: Courtesy NASA/JPL-Caltech

Perihelion 2020 Sep 21.139924 +/- 0.224 TT =  3:21:29 (JD 2459113.639924)
Epoch 2020 Jul 17.0 TT = JDT 2459047.5   Earth MOID: 0.0027   Ve: 0.0545
M 320.28294890 +/- 0.8              (J2000 ecliptic)          Find_Orb
n   0.60050040 +/- 0.0106           Peri.  107.92176 +/- 0.35
a   1.39142727 +/- 0.0164           Node   311.10237 +/- 0.024
e   0.6466292 +/- 0.00384           Incl.   45.40097 +/- 0.25
P   1.64/599.49d           H 19.0   G  0.15   U  9.7
q 0.49168968 +/- 0.000482    Q 2.29116486 +/- 0.0332
From 29 observations 2020 July 13-19; mean residual 0".18

Background

(as of 2020-07-20 ) 

(Check links for Updates)

• Object: 2020 NK1
• Orbit Type: Apollo [NEO, PHA]
• Approximate Diameter: 420 m - 940 m (1377.95 to 3083.99 Feet)  (Absolute H= 19.0 )
• On the Sentry Risk Table:  YES [26 Number of Potential Impacts  2084-2106]
• for more information read Understanding Risk Pages by Jon Giorgini 
• On the NEODyS CLOMON2 risk page: YES[46 Number of Potential Impacts  2080-2103] 
• Listed on The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS):NO 
• Listed on the Goldstone Asteroid Radar Schedule:NO
• Listed on the Arecibo Asteroid Radar Schedule:YES(Priority Level High)
• Radar Observations: none (yet)
• Discovery observation was made:2020 07 13.567919 by ATLAS-MLO, Mauna Loa(MPC Code T08)
• Last Observation(publish) was made:2020 07 19.607192 by ATLAS-HKO, Haleakala(MPC Code T05)
• Number of Optical Observations(published): 29
• Oppositions: 1 
• Number of Observatories Reporting (Published) Observations :6
• Observatories Reporting (Published) Observations(MPC Code):

• (474) Mount John Observatory, Lake Tekapo, New Zealand.
• (E10) Siding Spring-Faulkes Telescope South, Australia/NSW.
• (T05) ATLAS-HKO, Haleakala, US/Hawaii.  Observer
• (T08) ATLAS-MLO, Mauna Loa,US/Hawaii.  Observers
• (W88) Slooh.com Chile Observatory, La Dehesa,Chile.
• (Z84) Calar Alto-Schmidt, Spain. 

• Perihelion Distance: 0.49 AU
• Aphelion Distance: 2.28 AU
• Earth MOID: 0.00278361 AU (1.083 Lunar Distance) 65.29 Earth radii
• Close-Approach to Earth:  2020-Jul-31 Minimum Distance  0.052769696480622 (AU) 20.536 Lunar Distance (LD)

Also see:

• JPL Small-Body Database Browser (2020 NK1)
• Sentry: Earth Impact Monitoring 2020 NK1 -- Earth Impact Risk Summary   
• NEODyS-2 2020NK1 
• Understanding Risk Pages by Jon Giorgini 
• Arecibo Asteroid Radar Schedule
•  MPC  Observations Database 2020 NK1 
• Torino Scale  
• Sentry: Earth Impact Monitoring Introduction 
• Palermo Technical Impact Hazard Scale 
• Quantifying the risk posed by potential Earth impacts Steven R. Chesley (JPL), Paul W. Chodas (JPL), Andrea Milani (Univ. Pisa), Giovanni B. Valsecchi  Icarus 159, 423-432 (2002) (PDF)

 

2018 VP1 Information Sheet-- "1 in 240" Odds of a Fireball on 2020-11-02 or ."99.59% chance the asteroid will MISS the Earth"

2018 VP1 Information Sheet-- "1 in 240"  Odds of a Fireball on 2020-11-02 or ."99.59% chance the asteroid will MISS the Earth"

This artist's concept shows a broken-up asteroid.
Image: Courtesy NASA/JPL-Caltech

Throughout the year, very small rocks strick the Earth's atmosphere and creating spectacular fireballs.  Most of these rocks travel through space unknown to habitats of Earth until they strick the atmosphere.   If we are lucky, the fireball will be seen and reported.  If we are really lucky, the fireballs will be capture on film.  The most vast majority of fireballs are of no danger what so ever. Most fireballs are like rainbows in that they are cool.  Four times in the past, these rocks travel through the field of vision of an asteroid observer before impact. Observation was taken. The rocks were given designations, like 2014 AA( i.e., the first discovery of the first half of January in 2014), and the rocks "became" asteroids.  These four asteroids were on the safe side when it comes to size.

In the first half of November 2018, an asteroid was discovered and give the designation 2018 VP1.  This asteroid is very small[1.8 m - 3.9 m ( 5.90551 to 12.79528 feet) ]. This asteroid was only observed 21 times over 13 days. 

In orbit determination, one calculation what orbit will place the object in the sky where it was seen. If one knows an object's orbit, it knows where it is going and where it will be in the sky.  All observations are "imperfect," so there will be many similar orbits.  If one were to create virtual asteroids for each of the similar orbits and did a simulation, one would see over time. The virtual asteroids move apart from each other to create an uncertainty region.  The real asteroid is somewhere within the uncertainty region. When doing the simulation, if any of the virtual asteroids impact the Earth, they become virtual impactors, and there is 'Non-Zero' probability of the real asteroid hitting the Earth.  By calculating the percentage of virtual impactors to virtual asteroids, one can calculate the risk of impact.

There is a very low-risk impact 2018 VP1 will on 2020-11-02. However, it must be restarted this asteroid is very small[1.8 m - 3.9 m ( 5.90551 to 12.79528 feet) ]. We have a fireball this size about two times a year.

Also see Sentry: Earth Impact Monitoring

Find_orb computing  Monte Carlo variant orbits  for the NEO 2018 VP1. One can use Monte Carlo method to  create virtual asteroids. By using orbits of  the virtual asteroids one can can see where the "real" asteroid could go. If any of virtual asteroids impact the Earth they become  known as  virtual impactors and the is 'Non-Zero' probability of  the real  asteroid hitting the Earth

An program is Solex & Exorb

@kpheider asked me to calculate a path of risk for #2018VP1. It's only a few meters across but JPL's SENTRY has it at 1 chance in 240 of impacting on Nov 2, 2020 (ESA/NEODys has it at 1 in 400). Path of risk stretches across the Pacific. Calculated with SOLEX 12.1 pic.twitter.com/U8SGb8CvOl

— Peter Thomas (@ptastro1) July 26, 2019

Background

(as of 2020-06-13 )

• Object: 2018 VP1
• Orbit Type: NEO Apollo
• Approximate Diameter: 1.8  m - 3.9 m  ( 5.90551  to  12.79528 feet) (Absolute Magnitude: H=30.9)
• On the Sentry Risk Table:  YES 
• Impact Probability(2020-11-02.05) = 4.1e-3
• 0.41% chance of Earth impact
• 1 in 240 odds of impact
• 99.59% chance the asteroid will miss the Earth
•  for more information read Understanding Risk Pages by Jon Giorgini
• On the NEODyS CLOMON2 risk page: YES
• (2020-11-02.051) 5.16e-3
• 0.516%
• 1 in 194
• 99.484% chance the asteroid will miss the Earth
• Possible Earth Impact Effects Program of 2018 VP1
• Listed on The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS):NO
• Listed on the Goldstone Asteroid Radar Schedule:NO
• Listed on the Arecibo Asteroid Radar Schedule:NO
• Radar Observations:
• Discovery observation was made: 2018 11 03.27284202 5 (By  Palomar Mountain--ZTF (MPC Code I41)[ First precovery observation was 2018 11 03.27249502]
• Last Observation(publish) was made: 2018 11 16.24026503  (By Cerro Paranal (MPC Code 309))
• Data-Arc Span (publish): 13   days ( yr)
• Number of Optical Observations(published): 21
• Oppositions: 1
• Number of Observatories Reporting (Published) Observations :5
• Observatories Reporting (Published) Observations(MPC Code):
• (309) Cerro Paranal, Chile.
• (H01) Magdalena Ridge Observatory, Socorro, US/New
• (I41) Palomar Mountain--ZTF, US/California.
• (L01) Višnjan Observatory, Tičan, Croatia.
• (T12) Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m) 
• Perihelion Distance: 0.9051326626577225   (AU)
• Aphelion Distance: 2.270308947523921 (AU)
• Earth MOID: 5.54556E-5  (AU), 0.022 (LD), 1.30069951121949  (Earth Radii), (Miles), or  8,296.04 5,154.92 (KM)
• Close-Approach to Earth: Will pass the Earth on 2020-Nov-02 11:33  at a Nominal Distance(Best Fit) of  0.00280167254552464  (AU),  1.09 (LD), 65.71 (Earth Radii),  260,431.733 (Miles), or 419,124.247(KM). "IF" the Earth was the Size of a Basketball flyby would be  25.53 feet (  7.78 meters) away
• Close-Approach to Earth Uncertainty: 
• Distance (Maximum Distance (au) - Minimum Distance (au)):  0.0256085074009903 - 3.90766585857012e-05  = 0.02556943074(AU)  9.951(LD) or  3,825,132.39 KM( 2,376,827.07 Miles)
• Time Uncertainty: (minutes) 4750.56847240545 ( 3 Days  7 Hours  11
  Minutes)
• Object velocity relative to Earth at close-approach [V-relative] (KM/S): 9.71114662839966
• Object velocity relative to a massless Earth at close-approach[V-infinity](KM/S):9.61271582257126
• Visibility: 
• Naked Eye Visibility:NO
• Peak Magnitude:  17.1
  
•  2018 VP1 Ephemerides(Near Earth Objects Dynamic Site - NEODyS - SpaceDyS)

Note: this was edited  to add links missing data formatting,  typos, replace, the image of Find_orb computing, fixing bad links .

The NEO[Apollo] 2017 ES2 on 2020-03-30 from Siding Spring Observatory Australia (MPC Q62).

The NEO[Apollo] 2017 ES2 on 2020-03-30 from Siding Spring Observatory Australia (MPC Q62).

 

The NEO[Apollo] 2017 ES2 on 2020-03-30 from Siding Spring Observatory Australia (MPC Q62)
By Steven M. Tilley

Credits

The targeting information was obtained from the
The Minor Planet Center (MPC)
http://www.minorplanetcenter.net/

The images where taken with iTelescope.net's
T30 (0.50-m f/6.8 reflector + CCD)  Siding Spring Observatory Australia (MPC Q62)
http://iTelescope.Net/

Data reduction,  the stacked image, and  the object verification windows was done with Astrometrica
http://www.astrometrica.at/


Image blinking  was done with CCDStack2
http://www.ccdware.com/

Music
Attack of the Mole Men - Stings by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)

Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100321
Artist: http://incompetech.com/

The data was examine with the help of
Find_Orb Orbit determination software - Project Pluto
http://www.projectpluto.com/find_orb.htm
(c) Steven M. Tilley
http://lagniappeobserving.com

Tracking 2020 DR2 on 2020-03-02

The risk list object 2020 DR2 from Siding Spring Observatory Australia - MPC Q62 on 2020-03-01 stacks of 4 - 15 -second luminance BIN2 images taken with T17(0.43-m f/6.8 reflector + CCD).

Sentry: Earth Impact Monitoring( archive) http://archive.is/yjIZm

NEODyS CLOMON2 risk page ( archive) http://archive.ph/HVdHX

also see Jon Giorgini's "Understanding Risk Pages" http://www.hohmanntransfer.com/by/giorgjon.htm

The risk list object 2020 DR2 from
Siding Spring Observatory Australia -
MPC Q62 on 2020-03-01 a
stack of 4 - 15 -second luminance BIN2 images
taken with T17(0.43-m f/6.8 reflector + CCD)
By Steven M. Tilley

The risk list object 2020 DR2 from
Siding Spring Observatory Australia -
MPC Q62 on 2020-03-01 a
stack of 4 - 15 -second luminance BIN2 images
taken with T17(0.43-m f/6.8 reflector + CCD)
By Steven M. Tilley

The risk list object 2020 DR2 from
Siding Spring Observatory Australia -
MPC Q62 on 2020-03-01 a
stack of 4 - 15 -second luminance BIN2 images
taken with T17(0.43-m f/6.8 reflector + CCD)
By Steven M. Tilley

The risk list object 2020 DR2 from
Siding Spring Observatory Australia -
MPC Q62 on 2020-03-01 a
stack of 4 - 15 -second luminance BIN2 images
taken with T17(0.43-m f/6.8 reflector + CCD)
By Steven M. Tilley