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Legend - object IDs plus links to more info

Data compiled at 1851 UTC on 27 Nov. 2014 for 20 known objects during a period of seven days from 24 to 30 Nov. 2014. 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
MF62014 MF6255.63 LD  departed
UD572014 UD5770.96 LD  departed
WA2014 WA13.90 LD  departed
WA2012014 WA20120.43 LD  departed
WC2012014 WC2013.49 LD+/- 2 minutesapproaching
WE62014 WE610.38 LD  departed intruder
WF62014 WF654.08 LD+/- 2 minutes  departed
WF2002014 WF20018.56 LD+/- 2 minutes  departed
WF2012014 WF2016.26 LDoutbound
WJ62014 WJ627.43 LD  departed intruder
WN692014 WN6919.5 LD+/- 41 minutes  departed
WO42014 WO414.49 LD  departed
WR72014 WR75.55 LD  departed
WR3622014 WR3623.83 LD  departed
WS72014 WS75.93 LD  departed
WU2002014 WU2004.3 LD+/- 14 minutesinbound
WU2022014 WU2027.74 LDinbound
WX42014 WX416.88 LD  departed
WX2022014 WX2022.12 LD+/- 7 minutesinbound intruder
WY1192014 WY1194.41 LDoutbound
DateTfc.Time
24 Nov. '14Rept. Line
25 Nov. '14Rept. Line
26 Nov. '14Rept. Line
27 Nov. '14Rept. Line
28 Nov. '14Rept. Line
29 Nov. '14 Line
30 Nov. '14 Line

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

2014 WR362   -     departed
Approximate diameter12 meters (H=27.29)
Closest Earth approach1.39 LD at 1711 UT on 22 Nov. 2014
Inside Earth SOI22 to 23 Nov. 2014
Inside ten LD of Earth19 to 26 Nov. 2014
Closest Moon approach1.93 LD at 1137 UT on 22 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 27 Nov. 2014 UTC
based on 24 observations spanning 3 days
Optical observation  
  • reported from 5 observing codes during 2.9688 days: 291, 474, 703, G96, H36
  • designation assigned to Catalina Sky Survey observation at 0706 UT 24 Nov. 2014
  • last observed at 0621 UT on 27 Nov. 2014 by the Spacewatch 1.8m telescope
Links  
2014 WX202   -   inbound intruder
Approximate diameter4 meters (H=29.425)
Closest Earth approach0.98 LD at 1955 UT on 7 Dec. 2014 - Note: JPL reports an approach uncertainty of +/- 7 minutes
Inside Earth-Moon system0237 on 7 Dec. until 1310 UT on 8 Dec. 2014
Inside Earth SOI29 Nov. until 15 Dec. 2014
Inside ten LD of Earth30 Oct. until 18 Jan. 2015
Closest Moon approach0.58 LD at 0538 UT on 4 Dec. 2014
Inside one LD of Moon1650 on 2 Dec. until 2103 UT on 5 Dec. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 26 Nov. 2014 UTC
based on 24 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.1416 days: 291, G58, G96, J95
  • designation assigned to Mt. Lemmon Survey observation at 0925 UT 24 Nov. 2014
  • last observed at 1249 UT on 26 Nov. 2014 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2014 WU202   -   inbound
Approximate diameter14 meters (H=26.893)
Closest Earth approach7.74 LD at 1600 UT on 29 Nov. 2014
Inside ten LD of Earth25 Nov. until 3 Dec. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Nov. 2014 UTC
based on 11 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 2.9933 days: 291, 568, F51
  • designation assigned to Pan-STARRS 1 observation at 1110 UT 23 Nov. 2014
  • last observed at 1101 UT on 26 Nov. 2014 by the Spacewatch 1.8m telescope
Links  
2014 WF201   -   outbound
Approximate diameter25 meters (H=25.652)
Closest Earth approach6.24 LD at 1137 UT on 23 Nov. 2014
Inside ten LD of Earth16 to 30 Nov. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 27 Nov. 2014 UTC
based on 118 observations spanning 4 days
Optical observation  
  • reported from 11 observing codes during 4.0519 days: 104, 246, 703, 844, 900, C23, F51, H21, H45, J95, Z99
  • designation assigned to Catalina Sky Survey observation at 0439 UT 23 Nov. 2014
  • last observed at 0553 UT on 27 Nov. 2014 by Petit Jean Mtn. South Obs.
Links  
2014 WC201   -   approaching
Approximate diameter20 meters (H=26.096)
Closest Earth approach1.43 LD at 0451 UT on 2 Dec. 2014 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside Earth SOI1 to 2 Dec. 2014
Inside ten LD of Earth28 Nov. until 6 Dec. 2014
Closest Moon approach2.13 LD at 0021 UT on 2 Dec. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Nov. 2014 UTC
based on 30 observations spanning 5 days
Optical observation  
  • reported from 4 observing codes during 4.9423 days: 568, G96, H45, J95
  • designation assigned to Mt. Lemmon Survey observation at 0813 UT 22 Nov. 2014
  • last observed at 0650 UT on 27 Nov. 2014 by Petit Jean Mtn. South Obs.
Notesrisk
Links  
2014 WA201   -     departed
Approximate diameter14 meters (H=26.891)
Closest Earth approach5.88 LD at 1613 UT on 16 Nov. 2014
Inside ten LD of Earth13 to 19 Nov. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 26 Nov. 2014 UTC
based on 17 observations spanning 3 days
Optical observation  
  • reported from 2 observing codes during 3.1573 days: 568, G96
  • designation assigned to Mt. Lemmon Survey observation at 0458 UT 22 Nov. 2014
  • last observed at 0845 UT on 25 Nov. 2014 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2014 WU200   -   inbound
Approximate diameter5 meters (H=29.006)
Closest Earth approach1.17 LD at 1614 UT on 10 Dec. 2014 - Note: JPL reports an approach uncertainty of +/- 14 minutes
Inside Earth SOI5 to 15 Dec. 2014
Inside ten LD of Earth17 Nov. until 2 Jan. 2015
Closest Moon approach1.47 LD at 1412 UT on 7 Dec. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 26 Nov. 2014 UTC
based on 17 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 3.1163 days: 568, G96, J95
  • designation assigned to Mt. Lemmon Survey observation at 0656 UT 22 Nov. 2014
  • last observed at 0943 UT on 25 Nov. 2014 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2014 WF200   -     departed
Approximate diameter13 meters (H=27.014)
Closest Earth approach5.28 LD at 0206 UT on 15 Nov. 2014 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth10 to 19 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 Nov. 2014 UTC
based on 10 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 3.5063 days: 104, F51, G96
  • designation assigned to Pan-STARRS 1 observation at 1123 UT 20 Nov. 2014
  • last observed at 2332 UT on 23 Nov. 2014 by San Marcello Pistoiese Obs.
Links  
2014 WY119   -   outbound
Approximate diameter19 meters (H=26.273)
Closest Earth approach4.41 LD at 1246 UT on 26 Nov. 2014
Inside ten LD of Earth18 Nov. until 5 Dec. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 26 Nov. 2014 UTC
based on 33 observations spanning 4 days
Optical observation  
  • reported from 10 observing codes during 3.9119 days: 300, 703, 850, 900, 932, 958, G58, H01, J69, O75
  • designation assigned to Catalina Sky Survey observation at 0509 UT 21 Nov. 2014
  • last observed at 0302 UT on 25 Nov. 2014 by Chabot Obs.
Links  
2014 WN69   -     departed
Approximate diameter8 meters (H=28.007)
Closest Earth approach6.93 LD at 0651 UT on 5 Nov. 2014 - Note: JPL reports an approach uncertainty of +/- 41 minutes
Inside ten LD of Earth28 Oct. until 12 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Nov. 2014 UTC
based on 8 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 1.1328 days: 568, F51, G96
  • designation assigned to Pan-STARRS 1 observation at 0841 UT 17 Nov. 2014
  • last observed at 1152 UT on 18 Nov. 2014 by Marco Micheli via Mauna Kea
Links  
2014 WS7   -     departed
Approximate diameter12 meters (H=27.325)
Closest Earth approach4.41 LD at 1950 UT on 21 Nov. 2014
Inside ten LD of Earth16 to 26 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Nov. 2014 UTC
based on 25 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 1.3437 days: 291, 900, 958, G48, H21, H36, I41
  • designation assigned to Palomar Transient Factory observation at 0526 UT 19 Nov. 2014
  • last observed at 1341 UT on 20 Nov. 2014 by Moriyama Obs.
Links  
2014 WR7   -     departed
Approximate diameter19 meters (H=26.238)
Closest Earth approach3.00 LD at 1202 UT on 21 Nov. 2014
Inside ten LD of Earth16 to 26 Nov. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Nov. 2014 UTC
based on 58 observations spanning one day
Optical observation  
  • reported from 9 observing codes during 1.3952 days: 703, 900, 932, 958, C77, G48, H01, H21, H36
  • designation assigned to Catalina Sky Survey observation at 0218 UT 19 Nov. 2014
  • last observed at 1147 UT on 20 Nov. 2014 by Moriyama Obs.
Links  
2014 WJ6   -     departed intruder
Approximate diameter13 meters (H=27.051)
Closest Earth approach0.87 LD at 1611 UT on 15 Nov. 2014
Inside Earth-Moon system1232-1950 UT on 15 Nov. 2014
Inside Earth SOI14 to 16 Nov. 2014
Inside ten LD of Earth12 to 18 Nov. 2014
Closest Moon approach0.70 LD at 1727 UT on 15 Nov. 2014
Inside one LD of Moon1235-2219 UT on 15 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 19 Nov. 2014 UTC
based on 31 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 1.8322 days: 291, 703, G96, H01, H21, H36
  • designation assigned to Catalina Sky Survey observation at 1112 UT 17 Nov. 2014
  • last observed at 0711 UT on 19 Nov. 2014 by the Mt. Lemmon Survey
Links  
2014 WF6   -     departed
Approximate diameter45 meters (H=24.4)
Closest Earth approach2.61 LD at 1023 UT on 11 Nov. 2014 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth9 to 13 Nov. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Nov. 2014 UTC
based on 33 observations spanning 5 days
Optical observation  
  • reported from 7 observing codes during 5.1520 days: 291, 703, 807, D90, F51, G48, H21
  • designation assigned to Catalina Sky Survey observation at 0729 UT 17 Nov. 2014
  • last observed at 1107 UT on 22 Nov. 2014 by Pan-STARRS 1
Notesrisk
Links  
2014 WE6   -     departed intruder
Approximate diameter3 meters (H=30.306)
Closest Earth approach0.57 LD at 1805 UT on 13 Nov. 2014
Inside Earth-Moon system2255 on 12 Nov. until 1315 UT on 14 Nov. 2014
Inside Earth SOI11 to 16 Nov. 2014
Inside ten LD of Earth3 to 23 Nov. 2014
Closest Moon approach0.48 LD at 1924 UT on 13 Nov. 2014
Inside one LD of Moon0305 on 13 Nov. until 1148 UT on 14 Nov. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Nov. 2014 UTC
based on 25 observations spanning 4 days
Optical observation  
  • reported from 4 observing codes during 4.2723 days: 291, 568, G96, H01
  • designation assigned to Mt. Lemmon Survey observation at 0439 UT 17 Nov. 2014
  • last observed at 1112 UT on 21 Nov. 2014 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2014 WX4   -     departed
Approximate diameter18 meters (H=26.405)
Closest Earth approach5.57 LD at 0926 UT on 13 Nov. 2014
Inside ten LD of Earth7 to 18 Nov. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 23 Nov. 2014 UTC
based on 22 observations spanning 5 days
Optical observation  
  • reported from 5 observing codes during 5.1171 days: 703, 711, G96, H01, H21
  • designation assigned to Catalina Sky Survey observation at 0655 UT 16 Nov. 2014
  • last observed at 0944 UT on 21 Nov. 2014 by ARO Westfield
Links  
2014 WO4   -     departed
Approximate diameter44 meters (H=24.426)
Closest Earth approach3.95 LD at 2135 UT on 20 Nov. 2014
Inside ten LD of Earth18 to 22 Nov. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 20 Nov. 2014 UTC
based on 70 observations spanning 3 days
Optical observation  
  • reported from 8 observing codes during 2.8622 days: 033, 246, 300, 703, C77, G48, H36, O75
  • designation assigned to Catalina Sky Survey observation at 0650 UT 16 Nov. 2014
  • last observed at 0332 UT on 19 Nov. 2014 by Doc Greiner Research Obs. Rancho Hildalgo
Links  
2014 WA   -     departed
Approximate diameter8 meters (H=28.194)
Closest Earth approach1.89 LD at 1026 UT on 17 Nov. 2014
Inside Earth SOI16 to 18 Nov. 2014
Inside ten LD of Earth12 to 22 Nov. 2014
Closest Moon approach1.84 LD at 1925 UT on 17 Nov. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 17 Nov. 2014 UTC
based on 51 observations
Optical observation  
  • reported from 4 observing codes during 14.554 hours: 246, 300, 474, 703
  • designation assigned to Catalina Sky Survey observation at 0626 UT 16 Nov. 2014
  • last observed at 2059 UT on 16 Nov. 2014 by KLENOT
Notesrisk
Links  
2014 UD57   -     departed
Approximate diameter23 meters (H=25.8)
Closest Earth approach4.17 LD at 0250 UT on 23 Oct. 2014
Inside ten LD of Earth18 to 27 Oct. 2014
Data based onJPL SSD orbit solution #9 downloaded from JPL on 26 Nov. 2014 UTC
based on 92 observations spanning 27 days
Optical observation  
  • reported from 19 observing codes during 27.2746 days: 151, 160, 291, 300, 461, 568, 900, 932, 958, A48, D90, G40, G48, G96, H01, H21, H36, L04, O75
  • designation assigned to Mt. Lemmon Survey observation at 0412 UT 25 Oct. 2014
  • last observed at 1047 UT on 21 Nov. 2014 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2014 MF6   -     departed
Approximate diameter234 meters (H=20.8)
Closest Earth approach9.07 LD at 1938 UT on 9 July 2014
Inside ten LD of Earth8 to 11 July 2014
Data based onJPL SSD orbit solution #20 downloaded from JPL on 22 Nov. 2014 UTC
based on 129 observations spanning 156 days
Optical observation  
  • reported from 19 observing codes during 156.0180 days: 204, 291, 474, 493, 675, 703, 807, 844, 958, E23, F51, G40, G96, H21, I47, I52, L04, P25, Q62
  • first observed at 0915 UT on 18 June 2014 by Pan-STARRS 1
  • designation assigned to Catalina Sky Survey observation at 0633 UT 23 June 2014
  • last observed at 0941 UT on 21 Nov. 2014 by Pan-STARRS 1
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.