IF the Earth was the size of a basketball how far away would NEO Earth close approaches be? Here is a list of The 100 closest observed NEO Earth close approaches as of 2018-09-26.
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Showing posts with label Blogosphere. Show all posts
Showing posts with label Blogosphere. Show all posts
Sep 26, 2018
Jun 3, 2018
A Rock Designated ZLAF9B2(now 2018 LA) Social Media and Fireball Reports
On 2018-06-02 Richard A. Kowalski, with the Catalina Sky Survey reported observations of a "new" object, given the observ3er-assigned temporary designation "ZLAF9B2", to Minor Planet Center in Cambridge, Massachusetts, USA. It was posted to the NEOCP(NEO Confirmation Page) making the observations available to asteroid and comet researcher around the world. The data was analyzed and posted JPL's Scout: NEOCP Hazard Assessment, independently analyzed and posted to Bill Gray's Current NEOCP summary page. Then emails to mailing list post to social madia started going out. It was know to be small at the start.
When wroke up on 2018-06-02 I check iTelescope.net and saw their facility in Siding Spring Observatory, AU was clouded out than I went out to eat breakfast. When got back just to see what I would observe if I could observe, I check the NEOCP and saw that ZLAF9B2 was "bright", and then check "The Minor Planet Mailing List {MPML}" Some of the asteroid and comet researchers where talking. The Bill Gray sent and a number of carefully worded emails to email list stating ZLAF9B2 should be a "Priority Target".
When wroke up on 2018-06-02 I check iTelescope.net and saw their facility in Siding Spring Observatory, AU was clouded out than I went out to eat breakfast. When got back just to see what I would observe if I could observe, I check the NEOCP and saw that ZLAF9B2 was "bright", and then check "The Minor Planet Mailing List {MPML}" Some of the asteroid and comet researchers where talking. The Bill Gray sent and a number of carefully worded emails to email list stating ZLAF9B2 should be a "Priority Target".
One of the programs available to asteroid and comet researchers is Find_Orb
it is useful for calculating approximate ephemeris, determining approximate
orbits, residuals, generating virtual asteroids, virtual impactors, predicting impact locations, and many other things. It should be noted IF one uses wrong setting one get a totally wrong solution. One things Find_Orb can be use for is generating a "asteroid risk corridor" with the help of Guide 9.1. This should be done with care because of uncertainties in observations how one sets the over-observing parameters as well with other setting can the effect the results. Bill Gray posted post a risk corridor for ZLAF9B2 and I thought I would give it a try. I had Find_Orb generated virtual asteroids and virtual impactors using a monte carlo process.
Here is my TEST with Find_Orb using a monte carlo process see the files here |
Here is my TEST with Find_Orb using a monte carlo process see the files here |
Test with the newly added ATLAS observations with Find_Orb using a monte carlo process see the files here |
"that the objectreached 50-km height above the Earth's surface around 16:51 UTC over southern Africa."
Timeline of SOME of the Post to Social Media
{MPML} ZLAF9B2 = priority target (from Bill Gray):— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
Based on eleven observations from Catalina, this is
looking to be coming quite close, probably about 50000
km or so. It's mag 17.2 and getting brighter, too, so it shouldn't be
too tough to get.
A tiny (3-metre?) asteroid, ZLAF9B2, making a close approach to Earth within twice GEO distance, perhaps much closer. Some solutions by Bill Gray suggest possible impact over Indonesia around now - look out for fireball reports! Not big enough to be a worry.— Jonathan McDowell (@planet4589) June 2, 2018
It looks like there is a good probability the newly discovered small object ZLAF9B2 will impact the Earth's atmosphere within the next few hours. (Plot from MPML and Peter Birtwhistle) https://t.co/As7RgDseLA— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
It looks like there is a good probability ZLAF9B2 will impact the Earth within the next few hours. (Plot from MPML and Peter Birtwhistle) https://t.co/As7RgDseLA pic.twitter.com/XKktXbLNFn— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
ZLAF9B2 is very close.— Neil Norman FRAS. (@telescopecomet1) June 2, 2018
and then there's ZLAF9B2 https://t.co/YXiBEdQqqC— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
Update of the possible times of impact (UTC) for ZLAF9B2 from Bill Gray. pic.twitter.com/TEp9oF4Dcw— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
Analysis on the Minor Planet Mailing List suggests that the ZLAF9B2 object reentered and burnt up over Botswana at 1644UTC— Jonathan McDowell (@planet4589) June 2, 2018
Newly-disovered asteroid #ZLAF9B2 likely hit the Earth a few hours ago.https://t.co/fwx3eAVMX7 pic.twitter.com/C3rBgE07js— Tony Dunn (@tony873004) June 3, 2018
Strong infrasound detection of a bolide at station I47 in South Africa today at 1730 UT. Origin time between 1645-17 UT over Botswana. Yield 0.3-0.5 kT, corresponding to 2m diameter asteroid. #fireball #neoimpacts pic.twitter.com/fVe5GtwTtb— Peter Brown (@pgbrown) June 3, 2018
Yes, this was ZLAF9B2. I obviously left Germany too early— Peter Brown (@pgbrown) June 3, 2018
My Test with with Find_Orb and Guide 9--14 observations; 2018 June 2 (3.8 hr) (including newly added ATLAS observations) Monte Carlo noise set to 2 and Physical set to Standard #ZLAF9B2 pic.twitter.com/QqBBzXsOB2— Steven M. Tilley (@StevearenoBR) June 3, 2018
Just for fun, here’s my estimated fireball track from the Deelpan video alongside the @StevearenoBR candidate line. 800km is a surprise (I guessed 400km) but it’s calculated correctly if 50km altitude burst & it’s a v bright fireball. Atmospheric speed from @tony873004. #ZLAF9B2 pic.twitter.com/b9DWcezuST— Andy Cooper (@scute1133) June 3, 2018
{MPML} The object ZLAF9B2 is (given that it exploded in the air over Botswana yesterday) "posthumously" going to be named 2018 LA. https://t.co/JxTT8jwSGX— Asteroid Initiatives (@AsteroidEnergy) June 3, 2018
May 21, 2018
A Scale Model of the Earth if the Earth was the Size of a Basketball as of 2018-05-20
A Scale Model of the Earth if the Earth was the Size of a Basketball - Radius 12.0275 CM(4.73523622 inches)
Top of the Troposphere--0.038cm (0.015inches) 0.001 Ft
Top of the Stratosphere--0.113cm (0.045inches) 0.004 Ft
Top of the mesosphere--0.227cm (0.089inches) 0.007 Ft
STS-1(Perigee)--0.453cm (0.178inches) 0.015 Ft
STS-1(apogee)--0.474cm (0.187inches) 0.016 Ft
ISS(Perigee)--0.757cm (0.298inches) 0.025 Ft
ISS(apogee)--0.770cm (0.303inches) 0.025 Ft
Top of the Thermosphere--1.133cm (0.446inches) 0.037 Ft
The 50 closest observed NEO Earth close approaches as of 2018-05-20
01. The 2011-Feb-04 fly by of 2011 CQ1--10.347cm (4.074inches) 0.339 Ft
02. The 2008-Oct-09 fly by of 2008 TS26--11.816cm (4.652inches) 0.388 Ft
03. The 2004-Mar-31 fly by of 2004 FU162--12.351cm (4.862inches) 0.405 Ft
04. The 2016-Feb-25 fly by of 2016 DY30--14.978cm (5.897inches) 0.491 Ft
05. The 2017-Apr-04 fly by of 2017 GM--18.681cm (7.355inches) 0.613 Ft
06. The 2017-Oct-20 fly by of 2017 UJ2--21.756cm (8.565inches) 0.714 Ft
07. The 2011-Jun-27 fly by of 2011 MD--23.184cm (9.127inches) 0.761 Ft
08. The 2014-Jun-03 fly by of 2014 LY21--25.810cm (10.161inches) 0.847 Ft
09. The 2009-Nov-06 fly by of 2009 VA--26.590cm (10.469inches) 0.872 Ft
10. The 2012-May-29 fly by of 2012 KT42--27.263cm (10.734inches) 0.894 Ft
11. The 2017-Mar-02 fly by of 2017 EA--27.420cm (10.795inches) 0.900 Ft
12. The 2016-Sep-11 fly by of 2016 RN41--32.749cm (12.893inches) 1.074 Ft
13. The 2015-Sep-22 fly by of 2015 SK7--38.208cm (15.043inches) 1.254 Ft
14. The 2016-Jan-12 fly by of 2016 AH164--38.293cm (15.076inches) 1.256 Ft
15. The 2013-Dec-23 fly by of 2013 YB--39.225cm (15.443inches) 1.287 Ft
16. The 2017-Nov-26 fly by of 2017 WE30--44.815cm (17.644inches) 1.470 Ft
17. The 2016-Mar-11 fly by of 2016 EF195--47.677cm (18.771inches) 1.564 Ft
18. The 2008-Oct-20 fly by of 2008 US--50.052cm (19.705inches) 1.642 Ft
19. The 2004-Dec-19 fly by of 2004 YD5--51.949cm (20.452inches) 1.704 Ft
20. The 2013-Feb-15 fly by of 367943 Duende (2012 DA14)--52.259cm (20.574inches) 1.715 Ft
21. The 2015-Nov-15 fly by of 2015 VY105--53.303cm (20.985inches) 1.749 Ft
22. The 2016-Jan-14 fly by of 2016 AN164--57.900cm (22.795inches) 1.900 Ft
23. The 2010-Nov-17 fly by of 2010 WA--61.321cm (24.142inches) 2.012 Ft
24. The 2018-Jan-18 fly by of 2018 BD--61.859cm (24.354inches) 2.030 Ft
25. The 2015-Feb-17 fly by of 2015 DD1--62.075cm (24.439inches) 2.037 Ft
26. The 2014-Sep-07 fly by of 2014 RC--63.313cm (24.927inches) 2.077 Ft
27. The 2011-Feb-06 fly by of 2011 CF22--63.839cm (25.134inches) 2.094 Ft
28. The 2016-Sep-07 fly by of 2016 RB1--64.398cm (25.354inches) 2.113 Ft
Geosynchronous orbit--67.559cm (26.598inches) 2.216 Ft
29. The 2008-Nov-03 fly by of 2008 VM--75.248cm (29.625inches) 2.469 Ft
30. The 2004-Mar-18 fly by of 2004 FH--80.665cm (31.758inches) 2.646 Ft
31. The 2017-Oct-12 fly by of 2012 TC4--82.650cm (32.540inches) 2.712 Ft
32. The 2010-Oct-12 fly by of 2010 TD54--85.742cm (33.757inches) 2.813 Ft
33. The 2017-Jan-30 fly by of 2017 BH30--85.850cm (33.799inches) 2.817 Ft
34. The 2010-Nov-30 fly by of 2010 XB--87.847cm (34.586inches) 2.882 Ft
35. The 2013-Apr-18 fly by of 2013 HT25--89.662cm (35.300inches) 2.942 Ft
36. The 2017-May-04 fly by of 2017 JB2--93.008cm (36.617inches) 3.051 Ft
37. The 2014-Aug-31 fly by of 2014 RA--95.026cm (37.412inches) 3.118 Ft
38. The 2016-Apr-04 fly by of 2016 GN134--95.974cm (37.785inches) 3.149 Ft
39. The 2012-May-28 fly by of 2012 KP24--96.122cm (37.843inches) 3.154 Ft
40. The 2015-Apr-21 fly by of 2015 HD1--99.566cm (39.199inches) 3.267 Ft
41. The 2017-Oct-28 fly by of 2017 UL6--100.460cm (39.551inches) 3.296 Ft
42. The 2014-Mar-06 fly by of 2014 EC--104.224cm (41.033inches) 3.419 Ft
43. The 2009-Feb-27 fly by of 2009 EJ1--104.330cm (41.075inches) 3.423 Ft
44. The 2017-Aug-14 fly by of 2017 QP1--106.229cm (41.823inches) 3.485 Ft
45. The 2017-Mar-20 fly by of 2017 FN1--107.355cm (42.266inches) 3.522 Ft
46. The 2012-Mar-26 fly by of 2012 FS35--109.577cm (43.140inches) 3.595 Ft
47. The 2012-Jan-27 fly by of 2012 BX34--111.432cm (43.871inches) 3.656 Ft
48. The 2008-Mar-10 fly by of 2008 EF32--112.584cm (44.324inches) 3.694 Ft
49. The 2009-Oct-01 fly by of 2009 TB--119.071cm (46.878inches) 3.907 Ft
50. The 2007-Oct-17 fly by of 2007 UN12--119.600cm (47.087inches) 3.924 Ft
Light-second. 566.000cm (222.820inches) 18.568 Ft
Lunar distance (perigee)--673.000cm (265.000inches) 22.095 Ft
Lunar distance--714.000cm (281.000inches) 23.414 Ft
Lunar distance (apogee)--766.000cm (302.000inches) 25.128 Ft
Light-minute--34000.000cm (13400.000inches) 1114.101 Ft
Moon Equatorial radius--3.280cm (1.292inches) 0.108 Ft
Moon Equatorial radius Diameter--6.560cm (2.584inches) 0.215 Ft
Moon Equatorial Circumference--20.600cm (8.117inches) 0.676 Ft
Earth radius--12.000cm (4.735inches) 0.395 Ft
Earth (Equatorial) diameter--24.100cm (9.470inches) 0.789 Ft
Earth (Equatorial) Circumference--75.600cm (29.752inches) 2.479 Ft
See the spreadsheet The 50 closest observed NEO Earth close approaches as of 2018-05-20.xlsx
Oct 11, 2017
The Flyby By a "Astronomical Yard" of 2012 TC4
On 2017 October 12, the asteroid 2012 TC4 will flyby the Earth. This flyby has received a great deal of coverage in the media. When comes to media coverage of any asteroid flybys one of the most overused expressions is "close shave." Anyone who ever had to shave for work knows what a close shave is and what one is not. By comparing the solar system to the known universe, Pluto would be a "close shave" astronomically speaking. However, the subject at hand is the flyby of the Earth by an asteroid, therefor the Earth may serve a useful point of comparison.
If one wishes to simplify the matter, one could create a scale model of the Earth by way of a spreadsheet. If, one uses a ball with a diameter of 29.21 cm (11.5 inches) [this happen to be same as the as the length of a football ball(American)] to represent the Earth:
- A CM would be 436.2204724 KM, an inch would be 1108 KM.
- The International Space Station would be 9.2 mm away.
- Geosynchronous orbit would be 820.4 mm, 0.8204 m, or 0.8972 yards
- 2012 TC4 Nominal Distance(JPL)[2017-Oct-10] would be 1003.6 mm, 1.0036 m, or 1.0976 yards
- Light-second would be 6872.5 mm, 6.8725 m, or 7.5159 yards
- Lunar distance would be 8666.1 mm, 8.6661 m, or 9.4773 yards.
Useful Links:
- Fast Rotation of the NEA 2012 TC4 Indicates a Monolithic Structure by Polishook, D. in The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 40, No. 1, p. 42-43 (2013)
- Space Situational Awareness(ESA) -- 2012 TC4
- Near Earth Objects Dynamic Site--2012 TC4
- (MPC) Observations --2012 TC4
- JPL Orbit Diagram --2012 TC4
- Close Approach of Asteroid 2012 TC4(Tuesday, October 9, 2012 Remanzacco Observatory, Italy)
- NEO Earth Close Approaches (JPL) (upcoming)
- JPL's NEO Earth Close-Approaches (Between 1900 A.D. and 2200 A.D- limited to encounters with reasonably low uncertainty)
- The Tracking News
- NEO Coordination Centre
- Speed of Light - Space - Distance Calculator
- Asteroid Hazards: The View from Space(MPC)
- Don’t fear apocalyptic asteroids: you’re safer than you think
- Understanding Risk Pages By Jon Giorgini
- Revised asteroid scale aids understanding of impact risk
- Near Earth, Objects Scale Helps Risk Communication
- Dealing With the Impact Hazard: An International Project
- The Palermo Technical Impact Hazard Scale
- An Asteroid as Entered the Blogosphere… Should I Be Worried? A commentary by Steven M. Tilley
- International Asteroid Warning Network
- Impact Risk Assessment: An Introduction - Near-Earth Object Program
- Hazardous NEO Technical Reviews
- Frequently Asked Questions For Impact Risk Assessment
- How to Find an Impact Orbit for the Earth-Asteroid Collision
- The Asteroid/Comet Impact Hazard
- Whom should we call? Data policy for immediate impactors announcements
- NEO Search & Follow-Up
- NEOs' Science pages by Livia Giacomini
- Torino Scale(JPL)
- Find_Orb --- Orbit determination software - Project Pluto
- Guide to Minor Body Astrometry(MPC)
- Asteroid - Impact Simulator (Impact Earth!) by Purdue University,
- On-line Find_Orb
- 2012 TC4 Planning - JPL radar page
- The 2012 TC4 Observing Campaign
- Asteroid Flyby to Help NASA Observation
- Astronomical units to Earth radius (AU to RE)
- The 2012 TC4 Observing Campaign (University of Maryland)
- The Asteroid 2012 TC4 is Making a Safe Close-Approach on October-12-2017 Please Stand By For a Media Storm
Oct 8, 2017
The Asteroid 2012 TC4 on 2017-10-07
Useful Links:
- Will asteroid 2012 TC4 hit Earth in October 2017?
- Fast Rotation of the NEA 2012 TC4 Indicates a Monolithic Structure by Polishook, D. in The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 40, No. 1, p. 42-43 (2013)
- Space Situational Awareness(ESA) -- 2012 TC4
- Near Earth Objects Dynamic Site--2012 TC4
- (MPC) Observations --2012 TC4
- JPL Orbit Diagram --2012 TC4
- Close Approach of Asteroid 2012 TC4(Tuesday, October 9, 2012 Remanzacco Observatory, Italy)
- NEO Earth Close Approaches (JPL) (upcoming)
- JPL's NEO Earth Close-Approaches (Between 1900 A.D. and 2200 A.D- limited to encounters with reasonably low uncertainty)
- The Tracking News
- NEO Coordination Centre
- Speed of Light - Space - Distance Calculator
- Asteroid Hazards: The View from Space(MPC)
- Don’t fear apocalyptic asteroids: you’re safer than you think
- Understanding Risk Pages By Jon Giorgini
- Revised asteroid scale aids understanding of impact risk
- Near Earth, Objects Scale Helps Risk Communication
- Dealing With the Impact Hazard: An International Project
- The Palermo Technical Impact Hazard Scale
- An Asteroid as Entered the Blogosphere… Should I Be Worried? A commentary by Steven M. Tilley
- International Asteroid Warning Network
- Impact Risk Assessment: An Introduction - Near-Earth Object Program
- Hazardous NEO Technical Reviews
- Frequently Asked Questions For Impact Risk Assessment
- How to Find an Impact Orbit for the Earth-Asteroid Collision
- The Asteroid/Comet Impact Hazard
- Whom should we call? Data policy for immediate impactors announcements
- NEO Search & Follow-Up
- NEOs' Science pages by Livia Giacomini
- Torino Scale(JPL)
- Find_Orb --- Orbit determination software - Project Pluto
- Guide to Minor Body Astrometry(MPC)
- Asteroid - Impact Simulator (Impact Earth!) by Purdue University,
- On-line Find_Orb
- 2012 TC4 Planning - JPL radar page
- The 2012 TC4 Observing Campaign
- Asteroid Flyby to Help NASA Observation
- Astronomical units to Earth radius (AU to RE)
- The 2012 TC4 Observing Campaign (University of Maryland)
- The Asteroid 2012 TC4 is Making a Safe Close-Approach on October-12-2017 Please Stand By For a Media Storm
Oct 7, 2017
The Asteroid 2012 TC4 on 2017-10-06
Useful Links:
- Will asteroid 2012 TC4 hit Earth in October 2017?
- Fast Rotation of the NEA 2012 TC4 Indicates a Monolithic Structure by Polishook, D. in The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 40, No. 1, p. 42-43 (2013)
- Space Situational Awareness(ESA) -- 2012 TC4
- Near Earth Objects Dynamic Site--2012 TC4
- (MPC) Observations --2012 TC4
- JPL Orbit Diagram --2012 TC4
- Close Approach of Asteroid 2012 TC4(Tuesday, October 9, 2012 Remanzacco Observatory, Italy)
- NEO Earth Close Approaches (JPL) (upcoming)
- JPL's NEO Earth Close-Approaches (Between 1900 A.D. and 2200 A.D- limited to encounters with reasonably low uncertainty)
- The Tracking News
- NEO Coordination Centre
- Speed of Light - Space - Distance Calculator
- Asteroid Hazards: The View from Space(MPC)
- Don’t fear apocalyptic asteroids: you’re safer than you think
- Understanding Risk Pages By Jon Giorgini
- Revised asteroid scale aids understanding of impact risk
- Near Earth, Objects Scale Helps Risk Communication
- Dealing With the Impact Hazard: An International Project
- The Palermo Technical Impact Hazard Scale
- An Asteroid as Entered the Blogosphere… Should I Be Worried? A commentary by Steven M. Tilley
- International Asteroid Warning Network
- Impact Risk Assessment: An Introduction - Near-Earth Object Program
- Hazardous NEO Technical Reviews
- Frequently Asked Questions For Impact Risk Assessment
- How to Find an Impact Orbit for the Earth-Asteroid Collision
- The Asteroid/Comet Impact Hazard
- Whom should we call? Data policy for immediate impactors announcements
- NEO Search & Follow-Up
- NEOs' Science pages by Livia Giacomini
- Torino Scale(JPL)
- Find_Orb --- Orbit determination software - Project Pluto
- Guide to Minor Body Astrometry(MPC)
- Asteroid - Impact Simulator (Impact Earth!) by Purdue University,
- On-line Find_Orb
- 2012 TC4 Planning - JPL radar page
- The 2012 TC4 Observing Campaign
- Asteroid Flyby to Help NASA Observation
- Astronomical units to Earth radius (AU to RE)
- The 2012 TC4 Observing Campaign (University of Maryland)
- The Asteroid 2012 TC4 is Making a Safe Close-Approach on October-12-2017 Please Stand By For a Media Storm
Oct 2, 2017
The Asteroid 2012 TC4 on 2017-10-01
Background
(as of 2017-10-01)
- Object: 2012 TC4
- Orbit Type: Apollo [NEO]
- Approximate Diameter: 12m- 27 m (39.3701 feet to 88.5827 feet)(Absolute Magnitude: H= 26.7)
- On the Sentry Risk Table: Yes
- NOTE this is NOT a prediction of an impact but rather a statement there is insufficient observational data rule out an impact -- for more information read Understanding Risk Pages by Jon Giorgini
- Torino Scale 0
- "The likelihood of a collision is zero, or is so low as to be effectively zero. Also applies to small objects such as meteors and bodies that burn up in the atmosphere as well as infrequent meteorite falls that rarely cause damage.."
- On the NEODyS CLOMON2 risk page: Yes
- NEODyS Recovery Campaign: 2017-08-31 to 2017-10-24
- Discovery observation was made: 2012 10 04.467661
- Discovery observation was made by Pan-STARRS 1 (MPC Code F51) The Discovery M.P.E.C.: MPEC 2012-T18 : 2012 TC4
- Last Observation (publish): 2017 09 28.45648 (by the at Pan-STARRS 1, Haleakala (MPC Code F51 ) )
- Data-Arc Span (publish): 1820 days (4.98 years)
- Number of Optical Observations(published):445
- Observatories Reporting (Published) Observations(MPC Code):
- (089) Nikolaev, Ukraine.
- (104) San Marcello Pistoiese,Italy.
- (113) Drebach, Germany.
- (204) Schiaparelli Observatory,Italy.
- (291) LPL/Spacewatch II, US/Arizona.
- (300) Bisei Spaceguard Center-BATTeRS, Japan.
- (309) Cerro Paranal, Chile.
- (461) Szeged University, Piszkéstető Stn. (Konkoly), Hungary.
- (470) Ceccano, Italy.
- (695) Kitt Peak, US/Arizona.
- (703) Catalina Sky Survey, US/Arizona.
- (716) Palmer Divide Observatory, Colorado Springs, US/Colorado.
- (718) Tooele (N40.641406 W112.295800) US/Utah.
- (807) Cerro Tololo Observatory, La Serena,Chile.
- (857) Iowa Robotic Observatory, Sonoita US/Arizona.
- (900) Moriyama, Japan.
- (932) John J. McCarthy Obs., New Milford, US/Connecticut.
- (B04) OAVdA, Saint-Barthelemy,Italy.
- (B88) Bigmuskie Observatory, Mombercelli, Italy.
- (C32) Ka-Dar Observatory, TAU Station, Nizhny Arkhyz, Russia.
- (C77) Bernezzo Observatory, Italy.
- (E10) Siding Spring-Faulkes Telescope South, Australia/NSW.
- (F51) Pan-STARRS 1, Haleakala, US/Hawaii.
- (F65) Haleakala-Faulkes Telescope North, US/Hawaii.
- (G40) Slooh.com Canary Islands Observatory,Canary Islands (Spain).
- (G48) Harlingten Research Observatory, Rancho Hildalgo, US/New Mexico.
- (G96) Mt. Lemmon Survey,US/Arizona.
- (H01) Magdalena Ridge Observatory, Socorro, US/New Mexico.
- (H06) iTelescope, Mayhill, US/New Mexico.
- (H17) Angel Peaks Observatory,US/Colorado.
- (H21) Astronomical Research Observatory, Westfield, US/Illinois.
- (H36) Sandlot Observatory, Scranton, US/Kansas.
- (J04) ESA Optical Ground Station, Tenerife, Canary Islands (Spain).
- (J16) An Carraig Observatory, Loughinisland,UK.
- (J84) South Observatory, Clanfield,UK.
- (J95) Great Shefford,UK.
- (T09) Mauna Kea-UH/Tholen NEO Follow-Up (Subaru), US/Hawaii.
- (T12) Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m),US/Hawaii.
- (U69) iTelescope SRO Observatory, Auberry, US/California.
- (W85) Cerro Tololo-LCO A, Chile.
- Perihelion Distance: 0.9339351095314381(AU)
- Aphelion Distance:1.877536903700616(AU)
- Earth MOID (Earth center to NEO center):0.000146791 AU (0.057( LD)), (3.446 Earth radii) or 13,645.076 miles ( 21,959.471 (KM))
- Next Close-Approach to Earth: Will safely pass Earth on 2017-Oct-12 at a
- Minimum Distance(Earth center to NEO center) of 0.000335152723175429(AU) (0.13(LD)), (7.8697 Earth radii) or 31,154.392 miles (50,138.134(KM))
- Nominal Distance(Earth center to NEO center) of 0.000335252629744477(AU) (0.13(LD)), ( 7.8720 Earth radii) or 31,163.679 miles ( 50,153.08(KM))
- Maximum Distance(Earth center to NEO center) of 0.000335352538623426(AU) (0.13 (LD)), (7.8744 Earth radii) or 31,172.966 miles (50,168.026(KM))
- Goldstone Asteroid Schedule: Yes 2017 Oct ( Needs Astrometry: No Physical Observations Yes)
- Useful Links:
- Will asteroid 2012 TC4 hit Earth in October 2017?
- Fast Rotation of the NEA 2012 TC4 Indicates a Monolithic Structure by Polishook, D. in The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 40, No. 1, p. 42-43 (2013)
- Space Situational Awareness(ESA) -- 2012 TC4
- Near Earth Objects Dynamic Site--2012 TC4
- (MPC) Observations --2012 TC4
- JPL Orbit Diagram --2012 TC4
- Close Approach of Asteroid 2012 TC4(Tuesday, October 9, 2012 Remanzacco Observatory, Italy)
- NEO Earth Close Approaches (JPL) (upcoming)
- JPL's NEO Earth Close-Approaches (Between 1900 A.D. and 2200 A.D- limited to encounters with reasonably low uncertainty)
- The Tracking News
- NEO Coordination Centre
- Speed of Light - Space - Distance Calculator
- Asteroid Hazards: The View from Space(MPC)
- Don’t fear apocalyptic asteroids: you’re safer than you think
- Understanding Risk Pages By Jon Giorgini
- Revised asteroid scale aids understanding of impact risk
- Near Earth, Objects Scale Helps Risk Communication
- Dealing With the Impact Hazard: An International Project
- The Palermo Technical Impact Hazard Scale
- An Asteroid as Entered the Blogosphere… Should I Be Worried? A commentary by Steven M. Tilley
- International Asteroid Warning Network
- Impact Risk Assessment: An Introduction - Near-Earth Object Program
- Hazardous NEO Technical Reviews
- Frequently Asked Questions For Impact Risk Assessment
- How to Find an Impact Orbit for the Earth-Asteroid Collision
- The Asteroid/Comet Impact Hazard
- Whom should we call? Data policy for immediate impactors announcements
- NEO Search & Follow-Up
- NEOs' Science pages by Livia Giacomini
- Torino Scale(JPL)
- Find_Orb --- Orbit determination software - Project Pluto
- Guide to Minor Body Astrometry(MPC)
- Asteroid - Impact Simulator (Impact Earth!) by Purdue University,
- On-line Find_Orb
- 2012 TC4 Planning - JPL radar page
- The 2012 TC4 Observing Campaign
- Asteroid Flyby to Help NASA Observation
- Astronomical units to Earth radius (AU to RE)
- The 2012 TC4 Observing Campaign (University of Maryland)
- The Asteroid 2012 TC4 is Making a Safe Close-Approach on October-12-2017 Please Stand By For a Media Storm
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