The NEO 2020 NK1 On 2020-07-21 From Siding Spring Observatory Australia.

The NEO 2020 NK1 Has Been Rated Torino Impact Hazard Scale 1 this happens a few times a year. The current 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."  I in order to help lower uncertainty I did an imaging run with itelescope.net's T30 in itelescope.net

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The NEO 2020 NK1 on 2020-07-21 from Siding Spring Observatory Australia - MPC Q62 using  T30 (0.50-m f/6.8 reflector + CCD) a stack of 15 - 20 second luminance BIN2 images . By Steven M. Tilley

The NEO 2020 NK1 on 2020-07-21from Siding Spring Observatory Australia - MPC Q62 using T30 (0.50-m f/6.8 reflector + CCD) a stack of 15 - 20 second luminance BIN2 images . By Steven M. Tilley

The NEO 2020 NK1 on 2020-07-21 from Siding Spring Observatory Australia - MPC Q62 using T30 (0.50-m f/6.8 reflector + CCD) a stack of 15 - 20 second luminance BIN2 images . By Steven M. Tilley

Perihelion 2020 Sep 21.088437 +/- 0.0701 TT =  2:07:21 (JD 2459113.588437)
Epoch 2020 Jul 21.0 TT = JDT 2459051.5   Earth MOID: 0.0027   Ve: 0.0539
M 322.85838324 +/- 0.24            (J2000 ecliptic)          Find_Orb
n   0.59820505 +/- 0.00329          Peri.  107.84849 +/- 0.10
a   1.39498433 +/- 0.00511          Node   311.10569 +/- 0.006
e   0.6474844 +/- 0.0012              Incl.   45.46161 +/- 0.08
P   1.65/601.79d           H 19.0   G  0.15   U  8.9 
q 0.49175368 +/- 0.000137    Q 2.29821498 +/- 0.0103
From 41 observations 2020 July 13-21; mean residual 0".18

Background

(as of 2020-07-21 ) 

(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 [8 Number of Potential Impacts  2090-2101]
• for more information read Understanding Risk Pages by Jon Giorgini 
• On the NEODyS CLOMON2 risk page: YES[22 Number of Potential Impacts  2086-2102] 
• 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 21.18925000
  ESA Optical Ground Station, Tenerife (MPC Code J04)
• Number of Optical Observations(published): 38
• Oppositions: 1 
• Number of Observatories Reporting (Published) Observations :8
• Observatories Reporting (Published) Observations(MPC Code):

• (474) Mount John Observatory, Lake Tekapo, New Zealand.
• (E10) Siding Spring-Faulkes Telescope South, Australia/NSW.
• (J04) ESA Optical Ground Station, Tenerife , Canary   Islands (Spain).
• (Q59) Siding Spring-LCO Clamshell {#}2  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: 0.00275208 AU (1.071 Lunar Distance) 64.55 Earth radii
• Close-Approach to Earth:  2020-Jul-31 Minimum Distance  0.0544283775663102(AU) 21.182 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 
• The Tracking News - Earth's Busy Neighborhood , 2020-07-21,  2020-07-20, 2020-07-19, 2020-07-18  , Consolidated Risk Tables
• 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)