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Oct 22, 2020

Map of 316 impacts in Fireballs Reported by US Government Sensors (1988-Apr-15 to 2020-Oct-21; limited to events >= 0.3kt)

 Courtesy NASA/JPL-Caltech

Map of 316 impacts in Fireballs Reported by US Government Sensors (1988-Apr-15 to 2020-Oct-21; limited to events >= 0.3kt) https://cneos.jpl.nasa.gov/fireballs/ 2018VP1 is small~2m any fireball from it would be ~ 4.2e-4 Mt = 0.42 KT [note 225 are >= 0.42 KT] https://cneos.jpl.nasa.gov/sentry/details.html#?des=2018%20VP1
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Oct 5, 2020

Back of the Envelope Calculation Using the JPL's Fireball Data --- 2018 VP1

 I did a back of the envelope calculation using the JPL's fireball data to estimated that asteroids equal to or greater than 2018 VP1 impact the Earth at a rate of one every 37 to 53 days. IMHO we are at greater risk from the "background." https://docs.google.com/spreadsheets/d/12i7lhXgL0u6m36eoenKDKV-dLtkoedz0/edit?f#gid=1305411600 asteroid https://cneos.jpl.nasa.gov/fireballs/ https://cneos.jpl.nasa.gov/sentry/details.html#?des=2018%20VP1

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Aug 7, 2020

I am working on getting a website The Asteroid News up and running

 I am working on getting a website the Asteroid News up and running. There is a need for very high quality researches, writers, editors, web editors, coders, databases, etc. info(AT)theasteroidnews(dot)com

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Aug 1, 2020

The Asteroid 2020 NK1 Has Been Removed From Sentry: Earth Impact Monitoring

The Asteroid 2020 NK1 Has Been Removed From Sentry: Earth Impact Monitoring

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Jul 25, 2020

What is Up With Asteroid 2018 SV13

Here a write up "What is Up With Asteroid 2018 SV13" Is asteroid 2018 SV13 real? NO
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Jul 22, 2020

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
.
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)
  • (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:

 

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Jul 21, 2020

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)
  • (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:

 

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Jul 17, 2020

2018 SV13... "the object is not real"

There has been some media hub ba over 2018 SV13 Update on 2020 July 17 at 14:31 UT the Minor Planet Center Issued "MPEC 2020-O10 : RETRACTION OF 2018 SV13" .. 2018 SV13 " … the object is not real..." see https://minorplanetcenter.net/mpec/K20/K20O10.html

 Image edited by Steven M. Tilley  see the original (public domain) image Planetoid crashing into primordial Earth  at  Donald Davis' official site
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Jul 6, 2020

How to see Comet NEOWISE

How to see Comet NEOWISE
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Jul 2, 2020

0:00 / 4:08 Using Find orb and Guide9 To find the impact location of The NEO 2008 TC



Using Find_orb and Guide9 To find the impact location of The NEO 2008 TC3. Credits The Observations of 2008 TC3 was obtained from the The Minor Planet Center (MPC) https://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=2008+TC3 The data was examine with Find_Orb Orbit determination software - Project Pluto http://www.projectpluto.com/find_orb.htm Text editing done with MS Notepad The impact.tdf graphic was done with MS Paint. The Map was done with Guide9 https://www.projectpluto.com/guide9b.htm 2008TC3-groundpath-rev Wikimedia Commons https://en.wikipedia.org/wiki/2008_TC3#/media/File:2008TC3-groundpath-rev.png Music Way Out West by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://www.twinmusicom.org Created using Pinnacle Studio Steven M. Tilley http://lagniappeobserving.com A Link to the files MPCOrb.dat, state.txt, and virtual.txt https://drive.google.com/drive/folders/15P5YnrNr-BfhlFHWtoDtwV9xaITauqci?usp=sharing
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Jun 27, 2020

A Test of Find_orb and Guide9 with 2014 AA observations

A Test of Find_orb and Guide9 with 2014 AA observations
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Jun 19, 2020

A Foofaraw Over a NEO Designated 2018 VP1

Artist's concept of a near-Earth object. Image: Courtesy NASA/JPL-Caltech
Commentary 
Over the years, the tabloids as shown a propensity for raising a foofaraw over Near-Earth Objects. The Close-Approach of 2018 VP1 is only about four months away, and an internet search will reveal several clickbait stories. Many times it appears that tabloid writers pick a random asteroid and writes a "story" about it. At times one must have some background or do some research to see what the more accurate story is.

There is a low probability, 1 in 240, that the two-meter 2018 VP1 will strike the Earth's atmosphere and create spectacular fireballs on 2020-11-02. A test with the Imperial College London's Earth Impact Effects Program reports, "The average interval between impacts of this size somewhere on Earth is 0.2 years". In other words, it would be safe to assume objects the size of 2018 VP1 has impacted Earth's atmosphere since 2018-Nov-03, the date of discovery. The Earth Impact Effects Program also suggests that the fireball is unlikely to do any significant damage. NASA JPL list kinetic energy at impact from 2018 VP1[IF ANY] as ~ 0.00042 MegaTons of TNT. The Chelyabinsk event was 0.4 to 0.5 MegaTons of TNT.

Four times in the past, NEOs were observed by observers of asteroids before impact. These four asteroids(2008 TC3,2014 AA, 2018 LA, and 2019 MO) all were on the safe side when it comes to size.

 Object Date of discovery Date of Impact Size(M)
 2008 TC32008-10-06 2008-10-07 4.1
 2014 AA2014-01-01 2014-01-02 2–4
 2018 LA2018-06-02 2018-06-02 2.6–3.8
 2019 MO2019-06-22 2019-06-22 3–10

One of the programs available to the amateur observers of asteroids and comets is Find_Orb.[By Bill Gray] It is useful for calculating approximate ephemeris, determining approximate orbits, generating virtual asteroids, virtual impactors, predicting impact locations, and many other things. It should be noted IF one uses the wrong setting, one gets an incorrect solution. Find_Orb can generate an "asteroid risk corridor" with the help of Guide 9.1.[By Bill Gray]

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 

My Find_orb Setting

 Selecting perturbers All
 Epoch 2020-11-01.051
 Monte Carlo noise 2
 Physical model Include  SRP
 Filler out 3 worst observations

As a test of concept, I obtained the observations of 2018 VP1 for the Minor Planet Center. I loaded the observations into Find_Orb and had it run the Monte Carlo method all night. Find_orb generated the following files MPCOrb.dat, state.txt, and  virtual.txt. These files had orbits for 129,659 virtual asteroids 200 were virtual impactors( about 0.15%). I place a copy of the virtual.txt file in the Guide directory along with a copy of impact.tdf.(Project Pluto) Then Guide could generate a map of an asteroid risk corridor.

An asteroid (fireball) risk corridor of potential impact for the NEO 2018 VP1, the orange dots is where 200 virtual impactors strike the Earth's atmosphere.

Note: Because there were more than 9 observations, I had to edited virtual.txt to do a workaround. I replace "18 of 21" with "U of O" see edited virtual.txt; this keeps the columns in the right place. I also edited impact.tdf(My) file where I can have more than one risk corridor.



Peter Thomas @ptastro1 also  this path of risk for 2018 VP1 on Twitter

Background

(as of 2020-06-13 )

 
Also see
 

Note this has been edit to fix links and know typos.

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Jun 14, 2020

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
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.


Find_orb computing  Monte Carlo variant orbits for the NEO 2018 VP1
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



Background

(as of 2020-06-13 )

Note: this was edited  to add links missing data formatting,  typos, replace, the image of Find_orb computing, fixing bad links .
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Jun 10, 2020

441987 (2010 NY65) Information Sheet (2020)

 441987 (2010 NY65) Information Sheet (2020)


441987 (2010 NY65) Earth Distance: 0.025 au Sun Distance: 1.013 au 2020-06-24 06:44 UTC JPL Small-Body Database Browser Orbit Diagram for 441987 (2010 NY65) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=441987
441987 (2010 NY65)
Earth Distance: 0.025 au
Sun Distance: 1.013 au
2020-06-24 06:44 UTC
JPL Small-Body Database Browser
Orbit Diagram
for
441987 (2010 NY65)
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=441987
441987 (2010 NY65) Earth Distance: 0.025 au Sun Distance: 1.013 au 2020-06-24 06:44 UTC JPL Small-Body Database Browser Orbit Diagram for 441987 (2010 NY65) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=441987
441987 (2010 NY65)
Earth Distance: 0.025 au
Sun Distance: 1.013 au
2020-06-24 06:44 UTC
JPL Small-Body Database Browser
Orbit Diagram
for
441987 (2010 NY65)
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=441987
441987 (2010 NY65) Earth Distance: 0.025 au Sun Distance: 1.013 au 2020-06-24 06:44 UTC JPL Small-Body Database Browser Orbit Diagram for 441987 (2010 NY65) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=441987
441987 (2010 NY65)
Earth Distance: 0.025 au
Sun Distance: 1.013 au
2020-06-24 06:44 UTC
JPL Small-Body Database Browser
Orbit Diagram
for
441987 (2010 NY65)
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=441987

Background

(as of 2020-06-09 )


  • Object: 441987 (2010 NY65)
  • Orbit Type: Apollo [NEO, PHA]
  • Approximate Diameter: 140 m - m 310 (459.318 to 1017.06 feet) (Absolute Magnitude: H= 21.4)
  • Rotation Period: 4.9706 hour
  • On the Sentry Risk Table: NO Removed from Sentry 2010-08-05 09:54:55 for more information read Understanding Risk Pages by Jon Giorgini
  • On the NEODyS CLOMON2 risk page: NO
  • Listed on The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS): NO
  • Listed on the Goldstone Asteroid Radar Schedule:YES
  • Listed on the Arecibo Asteroid Radar Schedule:YES
  • Radar Observations:
    • First observation 2014-06-26
    • Last observation 2016-06-26
    • Delay : 9 [Discarded: 1]
    • Doppler: 3[Discarded 0]
    • Total: 12[Total Discarded:1]
  • Discovery observation was made: 2010 07 14.14345 (By WISE (MPC Code C51)
  • Last Observation(publish) was made: 019 07 21.318819 (By Palomar Mountain--ZTF (MPC Code I41 ))
  • Data-Arc Span (publish): 3294 days (9.02 yr)
  • Number of Optical Observations(published): 695
  • Oppositions: 8
  • Number of Observatories Reporting (Published) Observations : 42
  • Observatories Reporting (Published) Observations(MPC Code):
    • (089) Nikolaev, Ukraine.
    • (104) San Marcello Pistoiese,Italy.
    • (130) Lumezzane, Italy.
    • (160) Castelmartini, Italy.
    • (203) GiaGa Observatory, Italy.
    • (204) Schiaparelli Observatory, Italy.
    • (291) LPL/Spacewatch II, US/Arizona.
    • (511) Haute Provence, France.
    • (568) Mauna Kea, US/Hawaii.
    • (654) Table Mountain Observatory, Wrightwood-PHMC, US/California.
    • (691) Steward Observatory, Kitt Peak - Spacewatch US/Arizona.
    • (703) Catalina Sky Survey, US/Arizona.
    • (B18) Terskol, Russia.
    • (B38) Santa Mama, Italy.
    • (C23) Olmen, Belgium.
    • (C51) WISE
    • (C77) Bernezzo Observatory, Italy.
    • (D29) Purple Mountain Observatory, XuYi Station, China.
    • (F51) Pan-STARRS 1, Haleakala, US/Hawaii.
    • (G34) Oberfrauendorf, Germany.
    • (G45) Space Surveillance Telescope, Atom Site, US/New Mexico.
    • (G96) Mt. Lemmon Survey, US/Arizona.
    • (H06) iTelescope observatories, Mayhill, US/New
    • (H21) Astronomical Research Observatory, Westfield US/Illinois
    • (H45) Arkansas Sky Obs., Petit Jean Mountain South, US/Arkansas.
    • (I15) Wishing Star Observatory, Barrington, US/Rhode Island.
    • (I41) Palomar Mountain--ZTF,US/California.
    • (J43) Oukaïmeden Observatory, Marrakech, Morocco.
    • (J69) North Observatory, Clanfield,UK.
    • (K38) M57 Observatory, Saltrio, Italy.
    • (K83) Beppe Forti Astronomical Observatory, Montelupo, Italy.
    • (K91) Sutherland-LCO A, South Africa
    • (L04) ROASTERR-1 Observatory, Cluj-Napoca, Romania.
    • (T05) ATLAS-HKO, Haleakala, US/Hawaii. Observers
    • (T08) ATLAS-MLO, Mauna Loa,US/Hawaii.
    • (V04) FRoST, Anderson Mesa, US/Arizona.
    • (W34) Squirrel Valley Observatory, Columbus, US/North Carolina.
    • (W71) Rand II Observatory, Lake Placid, US/New York.
    • (Y00) SONEAR Observatory, Oliveira ,Brazil.
    • (Z21) Tenerife-LCO Aqawan A {#}1 Canary Islands (Spain).
    • (Z35) OAO University Observatory Station Aras,Spain.
    • (Z80) Northolt Branch Observatory, UK.
  • Perihelion Distance: 0.6304923524460032 (AU)
  • Aphelion Distance: 1.371788294334597 (AU)
  • Earth MOID: 0.017471 (AU), 6.7991956311354 (LD),   409.77865464 (Earth Radii), 1,624,030.9 (Miles), or 2,613,624.4(KM)
  • Close-Approach to Earth: Will safely pass Earth on 2020-Jun-24 at a Nominal Distance of  0.0251191828007878 (AU), 9.7756418039498  (LD), 589.165 (Earth Radii), 2,334,973.91 (Miles), or 3,757,776.3 (KM). "IF" the Earth was the Size of a Basketball flyby would be 228.7 feet ( 166.8 meters) away
  • Close-Approach to Earth Uncertainty: 
    • Distance (Maximum Distance (au) - Minimum Distance (au)): 0.025119195566403- 0.0251191700351812 = 2.55312E-08 or 3.8 KM(2.37 Miles)
    • Time Uncertainty (minutes):0.000771792121408675
  • Object velocity relative to Earth at close-approach [V-relative] (KM/S): 12.89
  • Object velocity relative to a massless Earth at close-approach[V-infinity](KM/S): 12.88
  • Visibility: 
See:




Note this was edited for formatting and adding infomation. 
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Jun 4, 2020

163348 (2002 NN4) Information Sheet

The asteroid 163348 (2002 NN4) has been in the news recently. It passed "under" Earth's orbit on 2020-06-03 and Earth will pass over its orbit on 2020-06-05 and the close approach will be 2020-Jun-06 03:20 (UTC).
163348 (2002 NN4)
Earth Distance: 0.034 au
Sun Distance: 1.036 au
2020-06-06 03:20 UTC
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=163348;old=0;orb=1;cov=0;log=0;cad=1#orb
Background
(as of 2020-06-04)

  • Object: 163348 (2002 NN4) 
  • Orbit Type: Aten  [NEO,  PHA]
  • Approximate Diameter: 250 m - 570 m (820.21 feet to 1870.08) (Absolute Magnitude: H= 20.1)[ Neowise estimates 2002NN4 to be 700 meters in diameter.]
    • (046) Kleť Observatory, Ceske Budejovice, Czech
    • (104) San Marcello Pistoiese, Italy. 
    • (106) Črni Vrh, Slovenia.
    • (113) Drebach, Germany.
    • (130) Lumezzane,  Italy.
    • (151) Eschenberg Observatory, Winterthur, Switzerland.
    • (160) Castelmartini, Italy.
    • (176) Observatori Astronomic de Consell, Spain.
    • (198) Wildberg, Germany. 
    • (203) GiaGa Observatory, Italy. 
    • (204) Schiaparelli Observatory, Italy. 
    • (240) Herrenberg Sternwarte, Germany. 
    • (246) Klet Observatory-KLENOT, Czech Republic.
    • (291) LPL/Spacewatch II, US/Arizona.
    • (355) Hadano, Japan. 
    • (422) Loomberah,  Australia/NSW.
    • (448) Desert Moon, US/New Mexico.
    • (473) Remanzacco,  Italy.
    • (557) Ondřejov, Czech Republic. 
    • (560) Madonna di Dossobuono, Italy. 
    • (568) Mauna Kea, US/Hawaii.
    • (587) Sormano, Italy. 
    • (595) Farra d'Isonzo, Italy.
    • (611) Starkenburg  (N49.647790 E8.653100)  Germany.
    • (620) Observatorio Astronomico de Mallorca, Spain.
    • (644) Palomar Mountain (NEAT),US/California. 
    • (649) Powell Observatory, Louisburg, US/Kansas.
    • (671) Stony Ridge  
    • (673) Table Mountain Observatory, Wrightwood, US/California.
    • (703) Catalina Sky Survey,  US/Arizona. 
    • (704) Lincoln Observatory ETS, New Mexico,  US/New Mexico. 
    • (715) Las Cruces,US/New Mexico. 
    • (734) Farpoint Observatory, Eskridge, US/Kansas.
    • (848) Tenagra Observatory, Cottage Grove, US/Oregon.
    • (926) Tenagra II, US/Arizona.
    • (966) Church Stretton, UK. 
    • (A16) Tentlingen, Switzerland.
    • (A17) Guidestar Observatory, Weinheim, Germany.
    • (A24) New Millennium Observatory, Italy
    • (B38) Santa Mama,  Italy.
    • (C51) WISE.
    • (D29) Purple Mountain Observatory, XuYi Station,  China. 
    • (F51) Pan-STARRS 1, Haleakala,US/Hawaii.
    • (H45) Arkansas Sky Obs., Petit Jean Mountain South. US/Arkansas.
    • (H55) Astronomical Research Observatory,  Charleston, US/Illinois.
    • (J95) Great Shefford, UK
    • (Z52) The Studios Observatory, Grantham, UK.
  • Earth MOID: 0.00693791(AU),  2.7 (LD), 162.727229457(Earth Radii), 644,919.024 (Miles), or 1,037,896.563 (KM) 
  • Close-Approach to Earth: Will safely pass Earth on 2020-Jun-06 03:20 at a Nominal Distance of 0.0340470945348114 (AU), 13.25(LD), 798.56748858316973383 (Earth Radii), 3,164,875.1578(Miles), or 5,093,372.846(KM). "IF" the Earth was the Size of a Basketball the (163348) 2002 NN4 flyby would be 309.92 feet (94.46 meters) away 
See:

Edited for typo






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