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Legend - object IDs plus links to more info

Data compiled at 2153 UTC on 24 July 2017 for fifteen known objects during a period of seven days from 21 to 27 July 2017. White type highlights objects with just announced discovery, and orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
BS52017 BS53.12 LDoutbound
CS2017 CS111.33 LD  departed
MB42007 MB417.9 LD  distant
MC42017 MC447.13 LD  departed
MF72017 MF791.82 LD  departed
MR82017 MR89.77 LD+/- one minute  departed
ND2017 ND31.04 LD  departed
NK22017 NK214.71 LD+/- one minute  departed
NN62017 NN676.09 LD+/- 3 minutes  departed
NT52017 NT528.88 LD  departed
NY65441987 2010 NY6577.67 LD  departed
OE12017 OE18.63 LDinbound
OH12017 OH17.84 LD+/- 2 minutes  departed
OM12017 OM12.31 LDinbound
UV136478784 2012 UV13653.6 LD  distant
DateTfc.Time
21 July '17Rept. Line
22 July '17Rept. Line
23 July '17Rept. Line
24 July '17Rept. Line
25 July '17Rept. Line
26 July '17 Line
27 July '17 Line

Object Details - Skychart objects presented in reverse designation order, newest first
  ("designation assigned to" indicates unofficial discovery credit)

2017 OM1   -   inbound
Approximate diameter74 meters (H=23.302)
Closest Earth approach2.31 LD at 1140 UT on 25 July 2017
Inside Earth SOIduring 25 July 2017
Inside ten LD of Earth22 to 28 July 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 July 2017 UTC
based on 98 observations spanning 2 days
Optical observation  
  • reported from 20 observing codes during 1.8218 days: 033, 104, 595, 734, B49, B74, E23, G40, G58, H21, I89, J04, K63, K88, T08, U69, V03, W25, W34, Y00
  • designation assigned to ATLAS Mauna Loa observation at 1209 UT 22 July 2017
  • last observed at 0753 UT on 24 July 2017 by RMS Obs.
Links  
2017 OH1   -     departed
Approximate diameter13 meters (H=27.093)
Closest Earth approach1.63 LD at 0149 UT on 19 July 2017 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside Earth SOI18 to 19 July 2017
Inside ten LD of Earth16 to 21 July 2017
Closest Moon approach1.83 LD at 2341 UT on 18 July 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 July 2017 UTC
based on 15 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 22.718 hours: 033, 104, 291, F51, J04, K88
  • first observed at 1009 UT on 21 July 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1029 UT 21 July 2017
  • last observed at 0852 UT on 22 July 2017 by the Spacewatch 1.8m telescope
Links  
2017 OE1   -   inbound
Approximate diameter43 meters (H=24.478)
Closest Earth approach8.63 LD at 2029 UT on 25 July 2017
Inside ten LD of Earth24 to 27 July 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 July 2017 UTC
based on 18 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 1.7694 days: J04, T08, Y00
  • designation assigned to ATLAS Mauna Loa observation at 1143 UT 20 July 2017
  • last observed at 0611 UT on 22 July 2017 by SONEAR
Links  
2017 NN6   -     departed
Approximate diameter330 meters (H=20.056)
Closest Earth approach7.41 LD at 2351 UT on 5 July 2017 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth4 to 7 July 2017
Data based onJPL SSD orbit solution #5 downloaded from JPL on 24 July 2017 UTC
based on 65 observations spanning 9 days
Optical observation  
  • reported from 7 observing codes during 9.0073 days: 807, E23, I47, Q62, R58, W88, Y00
  • designation assigned to SONEAR observation at 2314 UT 14 July 2017
  • last observed at 2325 UT on 23 July 2017 by SONEAR
Links  
2017 NT5   -     departed
Approximate diameter90 meters (H=22.886)
Closest Earth approach1.11 LD at 1616 UT on 14 July 2017
Inside Earth SOI14 to 15 July 2017
Inside ten LD of Earth12 to 16 July 2017
Closest Moon approach1.27 LD at 1347 UT on 14 July 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 15 July 2017 UTC
based on 86 observations spanning 21 days
Optical observation  
  • reported from 6 observing codes during 20.8810 days: E23, F51, K91, Q62, W85, Y00
  • first observed at 1102 UT on 23 June 2017 by Pan-STARRS 1
  • designation assigned to SONEAR observation at 2310 UT 12 July 2017
  • last observed at 0811 UT on 14 July 2017 by SONEAR
Notesrisk
Links  
2017 NK2   -     departed
Approximate diameter17 meters (H=26.539)
Closest Earth approach2.50 LD at 0400 UT on 10 July 2017
Inside ten LD of Earth3 to 17 July 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 11 July 2017 UTC
based on 22 observations spanning 5 days
Optical observation  
Links  
2017 ND   -     departed
Approximate diameter38 meters (H=24.738)
Closest Earth approach4.11 LD at 1346 UT on 27 June 2017
Inside ten LD of Earth20 June until 4 July 2017
Data based onJPL SSD orbit solution #6 downloaded from JPL on 20 July 2017 UTC
based on 54 observations spanning 15 days
Optical observation  
  • reported from 13 observing codes during 14.8000 days: 204, 703, C77, H21, H36, I52, J22, J95, K88, T08, W25, Y00, Z80
  • designation assigned to ATLAS Mauna Loa observation at 1240 UT 1 July 2017
  • last observed at 0752 UT on 16 July 2017 by ARO Westfield
Links  
2017 MR8   -     departed
Approximate diameter34 meters (H=24.987)
Closest Earth approach3.31 LD at 0213 UT on 15 July 2017
Inside ten LD of Earth9 to 21 July 2017
Data based onJPL SSD orbit solution #5 downloaded from JPL on 15 July 2017 UTC
based on 29 observations spanning 10 days
Optical observation  
  • reported from 7 observing codes during 10.6441 days: 160, 691, C95, G96, H36, I52, W25
  • designation assigned to Mt. Lemmon Survey observation at 0524 UT 30 June 2017
  • last observed at 2052 UT on 10 July 2017 by Castelmartini Obs.
Links  
2017 MF7   -     departed
Approximate diameter21 meters (H=26.083)
Closest Earth approach2.66 LD at 0917 UT on 17 June 2017
Inside ten LD of Earth13 to 21 June 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 16 July 2017 UTC
based on 13 observations spanning 21 days
Optical observation  
  • reported from 3 observing codes during 20.9790 days: 474, F51, T14
  • designation assigned to Pan-STARRS 1 observation at 1124 UT 24 June 2017
  • last observed at 1053 UT on 15 July 2017 by UH/Tholen NEO Follow-Up CFH Telescope
Links  
2017 MC4   -     departed
Approximate diameter131 meters (H=22.055)
Closest Earth approach7.61 LD at 0202 UT on 11 July 2017
Inside ten LD of Earth9 to 12 July 2017
Data based onJPL SSD orbit solution #15 downloaded from JPL on 17 July 2017 UTC
based on 150 observations spanning 18 days
Optical observation  
  • reported from 19 observing codes during 18.3857 days: 089, 107, 160, 203, 204, 691, 807, B18, G34, G96, H21, I52, K38, K74, K88, T08, W25, W88, Z80
  • designation assigned to Mt. Lemmon Survey observation at 1003 UT 23 June 2017
  • last observed at 1918 UT on 11 July 2017 by Nikolaev Obs. program code 5 via Nikolaev Obs.
Links  
2017 CS   -     departed
Approximate diameter446 meters (H=19.4)
Closest Earth approach7.93 LD at 1543 UT on 29 May 2017
Inside ten LD of Earth26 May until 1 June 2017
Data based onJPL SSD orbit solution #112 downloaded from JPL on 23 July 2017 UTC
based on 1101 observations spanning 184 days including radar
Optical observation  
  • reported from 60 observing codes during 183.7287 days: 073, 089, 104, 107, 108, 118, 151, 160, 204, 238, 291, 619, 691, 695, 703, 807, 926, A48, A53, B66, B67, C47, C77, C97, F51, G34, G40, G45, G48, G96, H21, H45, J69, K14, K17, K38, K40, K65, K73, K74, K91, L04, P93, Q62, T05, T08, V83, W08, W25, W33, W34, W85, W88, Y00, Z21, Z43, Z45, Z73, Z80, Z92
  • first observed at 1339 UT on 20 Jan. 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1205 UT 2 Feb. 2017
  • last observed at 0708 UT on 23 July 2017 by Petit Jean Mtn. South Obs.
Radar observation  
  • observed 12 times from one location during 9.3056 days
  • first observed at 2200 UT on 22 May 2017 by Goldstone DSS-14 70m antenna
  • last observed at 0520 UT on 1 June 2017 by Goldstone DSS-14 70m antenna
Notesradar target
Links  
2017 BS5   -   outbound
Approximate diameter51 meters (H=24.1)
Closest Earth approach3.12 LD at 1916 UT on 23 July 2017
Inside ten LD of Earth16 to 31 July 2017
Data based onJPL SSD orbit solution #19 downloaded from JPL on 24 July 2017 UTC
based on 221 observations spanning 190 days
Optical observation  
  • reported from 13 observing codes during 56.7537 days: 104, 160, 204, 595, A53, B18, F51, H21, H45, K74, L04, T08, T12
  • first observed at 1219 UT on 27 May 2017 by UH/Tholen NEO Follow-Up 2.24m Telescope
  • last observed at 0624 UT on 23 July 2017 by Petit Jean Mtn. South Obs.
NotesNHATS target
previous passage Jan. 2017 at 6.54 LD
Links  
478784 2012 UV136   -     distant
Approximate diameter27 meters (H=25.5)
Distance from Earth55.6 LD during the observation period
Data based onJPL SSD orbit solution #35 downloaded from JPL on 19 July 2017 UTC
based on 124 observations spanning 2012-2017
Optical observation  
  • reported from one observing code during 0.734 hours: H21
  • first observed at 0553 UT on 18 July 2017 by ARO Westfield
  • last observed at 0637 UT on 18 July 2017 by ARO Westfield
NotesNHATS target
previous passage Nov. 2012 at 5.79 LD, observation Aug.-Oct. 2013, observation Sept. 2014, observation Sept. 2015, and observation July-Sept. 2016
Links  
441987 2010 NY65   -     departed
Approximate diameter170 meters (H=21.5)
Closest Earth approach7.89 LD at 0637 UT on 24 June 2017
Inside ten LD of Earth22 to 26 June 2017
Data based onJPL SSD orbit solution #80 downloaded from JPL on 21 July 2017 UTC
based on 363 observations spanning 2010-2017 including radar
Optical observation  
  • reported from 13 observing codes during 25.5084 days: 130, 160, 703, D29, G96, H45, I15, J69, T05, T08, W34, Y00, Z80
  • first observed at 0211 UT on 25 June 2017 by Wishing Star Obs.
  • last observed at 1423 UT on 20 July 2017 by Purple Mtn. Obs. Xuyi Station
Notesradar target
previous observation July-Aug. 2010, observation June-Aug. 2013, observation June-July 2014, observation June-Aug. 2015, and observation June-Aug. 2016
Links  
2007 MB4   -     distant
Approximate diameter102 meters (H=22.6)
Distance from Earth18.4 - 40.7 LD min-max during the observation period
Data based onJPL SSD orbit solution #20 downloaded from JPL on 15 July 2017 UTC
based on 147 observations spanning 2007-2017
Optical observation  
  • reported from 6 observing codes during 12.6157 days: 160, E23, G96, H36, I52, W25
  • first observed at 0545 UT on 28 June 2017 by the Mt. Lemmon Survey
  • last observed at 2032 UT on 10 July 2017 by Castelmartini Obs.
Notesprevious passage July 2007 at 7.59 LD
Links  

Footnotes

Illustration of ten lunar distances.

1. Ten lunar distances:  A "lunar distance" (LD) is the average distance between Earth and Moon (about 384,400 km., the same as 238,855 miles or nearly ten [9.59] times around Earth's equator). Ten lunar distances has no special astronomical importance but is a useful arbitrary "bubble" within which to organize this reporting. An approach by a small Solar-System body starts to become interesting at less than four LD out from Earth as it encounters our planet's "Hill sphere" (distance indicated by the blue line in this illustration at about 3.9 LD). This is a region within which Earth's gravitational influence can change the orbits of passing objects. The Moon also has a Hill sphere, outlined here as a gray circle. (Earth and Moon are not shown to scale.) The "Earth-Moon system" is generally defined as that region of space within a radius of one lunar distance from Earth, so an object can pass very close to the Moon yet not be described as coming "inside" the E-M system.

2. Data credit:  All data on this page derived from orbit solutions comes from the NASA JPL Solar System Dynamics (SSD) Group through its Horizons system. All information about optical observations comes from the IAU Minor Planet Center (MPC) and info about radar observations comes from JPL SSD. The MPC, NASA, and JPL are not associated with this page or A/CC, and responsibility for the interpretation of this information and its use here rests entirely with A/CC. Important note: Approach times presented here as to-the-minute may have unstated uncertainties of a few minutes, or many minutes or even hours for objects with old or very short observation spans, which is significant because the Earth moves through its own diameter in about seven minutes. Thus actual encounter distances may vary, occasionally by as much as ten lunar distances. See JPL's Close Approach Tables for nominal vs. minimum possible passage distances and times and for their note about uncertainties.

3. Size estimates:  Object diameters are rough approximations derived by standard formula from H, an object's "absolute magnitude" (brightness), where higher numbers represent dimmer (thus usually smaller) objects.