The Asteroid 2011 ES4 Passed Beyond The Moon on September 2, 2020

The Close-Approach of 2011 ES4 on September 2, 2020 , of 0.011 AU 3.848(LD) -- 231.88(Earth Radii) --- the JPL Small-Body Database Browser (2011 ES4) Orbit Diagram< — The Close-Approach of 2011 ES4 on September 2, 2020 , of 0.011 AU 3.848(LD) — 231.88(Earth Radii) — the JPL Small-Body Database Browser (2011 ES4) Orbit Diagram

The internet has been buzzing over the Near-Earth Object 2011 ES4. As a result of reports, it would closer than the Moon on September 1, 2020, 12:12 p.m. EDT. However many of the reports ignore or underplay the 8 days 00:08 uncertainty in the time of Close-Approach. In due time astronomers recovered 2011 ES4 on September 5, 2020. Now we know 2011 ES4 and Earth made Close-Approach on September 2, 2020, of 0.011 AU 3.848(LD), 231.88(Earth Radii), 1.020,000, or miles,1,650,000(KM). We also know there is no risk from 2011 ES4 for the foreseeable future.

JPL Orbital Elements at Epoch 2459000.5 (2020-May-31.0 Before and after recovery — JPL Orbital Elements at Epoch 2459000.5 (2020-May-31.0 before and after recovery

2011 ES4 Close-Approach data before recovery

2011 ES4 Close-Approach data after recovery

Background(as of 2020-09-06)

Object: 2011 ES4
Orbit Type: NEO (Apollo)
Approximate Diameter: 22 m – 49 m [72.18 ft to 160.76 ft] (Absolute H= 25.4)
On the Sentry Risk Table: NO JPL removed it 2020-09-06 16:14:49
- for more information on risk, pages read Understanding Risk Pages by Jon Giorgini
On the NEODyS CLOMON2 risk page: NO
Listed on the Goldstone Asteroid Radar Schedule: No
Listed on the Arecibo Asteroid Radar Schedule: No
Radar Observations: none
Discovery observation was made: 2011 03 02.19847 (04:45:47.81)
by Mt. Lemmon Survey (MPC Code G96)
Last Observation(publish) was made: 2020 09 06.25868 (06:12:29.95) at iTelescope Observatory, Mayhill, (MPC Code H06)
The number of Optical Observations(published): 106
Oppositions: 2
Observation arc: 3476 days (9.52 yr)
The number of Observatories Reporting (Published) Observations: 22
Observatories Reporting (Published) Observations(MPC Code):
- (104) San Marcello Pistoiese, Italy.
- (204) Schiaparelli Observatory, Italy.
- (291) LPL/Spacewatch II, Arizona, USA.
- (586) Pic du Midi, France.
- (595) Farra d’Isonzo, Italy.
- (734) Farpoint Observatory, Eskridge, Kansas, USA
- (F51) Pan-STARRS 1, Haleakala, Hawaii, USA.
- (G96) Mt. Lemmon Survey, Arizona, USA
- (H01) Magdalena Ridge Observatory, Socorro, New Mexico, USA.
- (H06) iTelescope Observatory, Mayhill, New Mexico, USA.
- (H21) Astronomical Research Observatory, Westfield, Illinois, USA.
- (I52) Steward Observatory, Mt. Lemmon Station, Arizona, USA.
- (I93) St Pardon de Conques, France.
- (J69) North Observatory, Clanfield, UK.
- (J95) Great Shefford, UK.
- (K83) Beppe Forti Astronomical Observatory, Montelupo, Italy.
- (L01) Višnjan Observatory, Tičan, Croatia.
- (L18) QOS Observatory, Zalistci, Ukraine.
- (W33) Transit Dreams Observatory, Campobello, South Carolina, USA.
- (W34) Squirrel Valley Observatory, Columbus, North Carolina, USA.
- (X31) Galileo Galilei Observatory, Oro Verde, Argentina.
- (Z80) Northolt Branch Observatory, UK.
Perihelion Distance: 0.826 AU
Aphelion Distance: 1.354 AU
Earth MOID: 0.000629743 AU ( 0.245 Lunar Distance) 14.77 Earth radii
Close-Approach to Earth:
- Date and Time(TDB): 2020-Sep-02 07:49
- Time Uncertainty: ± < 00:01 (0.138943590186452 minutes)
- Minimum Distance: 0.00988627995970876 (AU), 3.847 (LD) 231.88 Earth radii, 918,987.135 miles, 1,478,966.431 KM
- Nominal Distance(best fit): 0.00988652085573321 (AU), 3.848 (LD), 231.87 Earth radii, 919,009.527 miles, 1,479,002.469 KM
- Maximum Distance: 0.00988676175223704 (AU) 3.848 (LD), 231.89 Earth radii, 919,031.92 miles, 1,479,038.506 KM
Was, it Be Visible to the Unaided Eye: No

The Asteroid 2011 ES4 Passed Beyond The Moon on September 2, 2020

Background(as of 2020-09-06)

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