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Legend - object IDs plus links to more info

Data compiled at 2312 UTC on 21 April 2014 for ten known objects during a period of seven days from 19 to 25 April 2014.


ID

Full ID
Period
Closest
Passage
Uncertainty

Status
GB492014 GB4939.03 LDdeparted
GC492014 GC4960.53 LD+/- one minutedeparted intruder
GG452014 GG4544.73 LDdeparted
GG492014 GG493.91 LDoutbound
GQ172014 GQ1718.18 LDdeparted
GQ452014 GQ4516.67 LDdeparted
GY442014 GY4456.41 LD+/- 6 minutesdeparted intruder
HB152007 HB157.3 LD+/- 12.7500 hoursinbound
HW2014 HW2.4 LD+/- 8 minutesinbound
TV182007 TV187.71 LDdeparted
DateTfc.Time
19 April '14Rept. Line
20 April '14Rept. Line
21 April '14Rept. Line
22 April '14Rept. Line
23 April '14Rept. Line
24 April '14 Line
25 April '14 Line

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

2014 HW   -   inbound
Approximate diameter7 meters (H=28.445)
Closest Earth approach2.08 LD at 0432 UT on 27 April 2014 - Note: JPL reports an approach uncertainty of +/- 8 minutes
Inside Earth's Hill sphere23 to 30 April 2014
Inside ten LD of Earth17 April until 7 May 2014
Closest Moon approach2.47 LD at 1552 UT on 27 April 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 April 2014 UTC
based on 21 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 22.330 hours: 807, 958, G96
  • designation assigned to Mt. Lemmon Survey observation at 0909 UT 20 April 2014
  • last observed at 0729 UT on 21 April 2014 by the Mt. Lemmon Survey
Links  
2014 GG49   -   outbound
Approximate diameter24 meters (H=25.725)
Closest Earth approach3.91 LD at 1143 UT on 19 April 2014
Inside ten LD of Earth15 to 23 April 2014
Data based onJPL SSD orbit solution #9 downloaded from JPL on 19 April 2014 UTC
based on 39 observations spanning 9 days
Optical observation  
  • reported from 7 observing codes during 9.7395 days: 291, G96, H01, H21, H36, J95, K93
  • designation assigned to Mt. Lemmon Survey observation at 0748 UT 9 April 2014
  • last observed at 0132 UT on 19 April 2014 by Great Shefford Obs.
Notesradar target
Links  
2014 GC49   -   departed intruder
Approximate diameter6 meters (H=28.585)
Closest Earth approach0.30 LD at 0257 UT on 3 April 2014
Inside Earth-Moon system2056 on 2 April until 0859 UT on 3 April 2014
Inside Earth's Hill sphere2 to 4 April 2014
Inside ten LD of Earth31 March until 5 April 2014
Closest Moon approach1.24 LD at 0134 UT on 3 April 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 12 April 2014 UTC
based on 12 observations spanning one day
Optical observation  
  • reported from 2 observing codes during 22.850 hours: 291, G96
  • designation assigned to Mt. Lemmon Survey observation at 0510 UT 4 April 2014
  • last observed at 0401 UT on 5 April 2014 by the Spacewatch 1.8m telescope
Links  
2014 GB49   -   departed
Approximate diameter24 meters (H=25.793)
Closest Earth approach3.94 LD at 1623 UT on 5 April 2014
Inside ten LD of Earth2 to 8 April 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 12 April 2014 UTC
based on 46 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 24.967 hours: 300, 703, F51, G96, H36, I93, J95
  • designation assigned to Mt. Lemmon Survey observation at 0413 UT 4 April 2014
  • last observed at 0511 UT on 5 April 2014 by the Mt. Lemmon Survey
Links  
2014 GQ45   -   departed
Approximate diameter27 meters (H=25.531)
Closest Earth approach8.20 LD at 1234 UT on 10 April 2014
Inside ten LD of Earth7 to 13 April 2014
Data based onJPL SSD orbit solution #6 downloaded from JPL on 20 April 2014 UTC
based on 98 observations spanning 8 days
Optical observation  
  • reported from 15 observing codes during 7.8002 days: 033, 203, 204, 300, 461, 703, 900, 926, 958, G96, H01, H21, I93, J95, K51
  • designation assigned to Catalina Sky Survey observation at 0722 UT 9 April 2014
  • last observed at 0234 UT on 17 April 2014 by Schwarzschild Obs.
Links  
2014 GG45   -   departed
Approximate diameter35 meters (H=24.908)
Closest Earth approach5.00 LD at 1207 UT on 9 April 2014
Inside ten LD of Earth7 to 11 April 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 9 April 2014 UTC
based on 34 observations spanning 2 days
Optical observation  
  • reported from 5 observing codes during 2.0236 days: 204, 703, G96, H01, J95
  • designation assigned to Catalina Sky Survey observation at 0926 UT 7 April 2014
  • last observed at 1000 UT on 9 April 2014 by Magdalena Ridge Obs.
Links  
2014 GY44   -   departed intruder
Approximate diameter29 meters (H=25.359)
Closest Earth approach0.43 LD at 0033 UT on 30 March 2014 - Note: JPL reports an approach uncertainty of +/- 6 minutes
Inside Earth-Moon system1644 on 29 March until 0821 UT on 30 March 2014
Inside Earth's Hill sphere28 to 31 March 2014
Inside ten LD of Earth26 March until 2 April 2014
Closest Moon approach0.10 LD at 1736 UT on 29 March 2014
Inside Moon's Hill sphereduring 29 March 2014
Inside one LD of Moon0912 on 29 March until 0158 UT on 30 March 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 9 April 2014 UTC
based on 25 observations spanning 5 days
Optical observation  
  • reported from 2 observing codes during 5.0390 days: 703, G96
  • designation assigned to Catalina Sky Survey observation at 0759 UT 4 April 2014
  • last observed at 0855 UT on 9 April 2014 by the Mt. Lemmon Survey
Notesrisk
Links  
2014 GQ17   -   departed
Approximate diameter13 meters (H=27.066)
Closest Earth approach1.94 LD at 2318 UT on 3 April 2014
Inside Earth's Hill sphere1 to 6 April 2014
Inside ten LD of Earth26 March until 12 April 2014
Closest Moon approach2.94 LD at 2007 UT on 3 April 2014
Data based onJPL SSD orbit solution #8 downloaded from JPL on 20 April 2014 UTC
based on 78 observations spanning 15 days
Optical observation  
  • reported from 8 observing codes during 14.9890 days: 291, 585, 703, 926, 958, C77, G96, H21
  • designation assigned to Catalina Sky Survey observation at 0632 UT 5 April 2014
  • last observed at 0616 UT on 20 April 2014 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2007 TV18   -   departed
Approximate diameter71 meters (H=23.4)
Closest Earth approach7.39 LD at 0001 UT on 18 April 2014
Inside ten LD of Earth14 to 21 April 2014
Data based onJPL SSD orbit solution #21 downloaded from JPL on 18 April 2014 UTC
based on 88 observations spanning 2007-2014
Optical observation  
  • reported from 12 observing codes during 15.5900 days: 160, 204, 246, 703, 807, 850, 926, 958, B67, E23, G96, J95
  • first observed at 0653 UT on 1 April 2014 by the Mt. Lemmon Survey
  • last observed at 2102 UT on 16 April 2014 by Great Shefford Obs.
Notesradar target
Links  
2007 HB15   -   inbound
Approximate diameter9 meters (H=27.8)
Closest Earth approach6.66 LD at 0327 UT on 28 April 2014 - Note: JPL reports an approach uncertainty of +/- 12.7500 hours
Inside ten LD of Earth22 April until 3 May 2014
Data based onJPL SSD orbit solution #5 downloaded from JPL on 12 April 2014 UTC (dated 5 Aug. 2013 local)
based on 24 observations spanning one day
Optical observation  
    none recent
Notesrisk
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.