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Legend - object IDs plus links to more info

Data compiled at 1909 UTC on 19 Sept. 2014 for fourteen known objects during a period of seven days from 16 to 22 Sept. 2014. Orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
FV92010 FV932.09 LDapproaching
KD2014 KD196.87 LDdeparted
QE4342014 QE43463.0 LD+/- 12 minutesdeparted
QH332014 QH3347.51 LDdeparted
QP4342014 QP43442.89 LD+/- 5 minutesdeparted
QS1682014 QS16867.53 LD+/- 4 minutesdeparted
QV2962014 QV29683.0 LDdistant observation
QY332014 QY3355.51 LDdeparted
RC2014 RC18.71 LDdeparted intruder
RR2009 RR2.0 LD+/- 2.135 daysoutbound
RT172014 RT1737.71 LDdeparted
RW182014 RW186.29 LD+/- 2 minutesinbound
RZ532013 RZ532.9 LD+/- 20 minutesoutbound
TB42011 TB452.5 LD+/- 1.821 daysapproaching
DateTfc.Time
16 Sept. '14Rept. Line
17 Sept. '14Rept. Line
18 Sept. '14Rept. Line
19 Sept. '14Rept. Line
20 Sept. '14Rept. Line
21 Sept. '14 Line
22 Sept. '14 Line

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

2014 RW18   -   inbound
Approximate diameter22 meters (H=25.908)
Closest Earth approach6.29 LD at 0132 UT on 20 Sept. 2014 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth15 to 24 Sept. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 15 Sept. 2014 UTC
based on 37 observations spanning one day
Optical observation  
  • reported from 8 observing codes during 22.070 hours: 160, 703, 900, C92, H21, H36, J95, W86
  • designation assigned to Catalina Sky Survey observation at 0738 UT 14 Sept. 2014
  • last observed at 0542 UT on 15 Sept. 2014 by LCOGT Cerro Tololo B
Links  
2014 RT17   -   departed
Approximate diameter45 meters (H=24.392)
Closest Earth approach3.74 LD at 1644 UT on 7 Sept. 2014
Inside ten LD of Earth5 to 9 Sept. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Sept. 2014 UTC
based on 27 observations spanning 6 days
Optical observation  
  • reported from 7 observing codes during 6.0324 days: 104, 958, F51, G96, H36, I93, J95
  • designation assigned to Pan-STARRS 1 observation at 0807 UT 12 Sept. 2014
  • last observed at 0854 UT on 18 Sept. 2014 by Pan-STARRS 1
Links  
2014 RC   -   departed intruder
Approximate diameter15 meters (H=26.792)
Closest Earth approach0.10 LD at 1800 UT on 7 Sept. 2014
Inside Earth-Moon system0736 on 7 Sept. until 0425 UT on 8 Sept. 2014
Inside Earth SOI6 to 8 Sept. 2014
Inside ten LD of Earth3 to 12 Sept. 2014
Closest Moon approach0.33 LD at 0846 UT on 7 Sept. 2014
Inside one LD of Moon2303 on 6 Sept. until 1823 UT on 7 Sept. 2014
Data based onJPL SSD orbit solution #18 downloaded from JPL on 17 Sept. 2014 UTC (dated 15 Sept. 2014 local)
based on 239 observations spanning 18 days including radar
Optical observation  
  • reported from 24 observing codes during 18.1384 days: 157, 213, 300, 467, 470, 510, 568, 587, 703, A77, B04, B18, C77, D90, F51, G40, H21, H45, I39, I47, I99, J95, Q62, U69
  • first observed at 1017 UT on 20 Aug. 2014 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0819 UT 2 Sept. 2014
  • last observed at 1337 UT on 7 Sept. 2014 by Bisei Spaceguard Center
Radar observation  
Links  
2014 QP434   -   departed
Approximate diameter9 meters (H=27.821)
Closest Earth approach1.21 LD at 0335 UT on 27 Aug. 2014 - Note: JPL reports an approach uncertainty of +/- 5 minutes
Inside Earth SOI26 to 28 Aug. 2014
Inside ten LD of Earth22 to 31 Aug. 2014
Closest Moon approach1.72 LD at 1954 UT on 26 Aug. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 12 Sept. 2014 UTC
based on 21 observations spanning one day
Optical observation  
  • reported from 2 observing codes during 1.0478 days: G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0952 UT 29 Aug. 2014
  • last observed at 1101 UT on 30 Aug. 2014 by the Mt. Lemmon Survey
Links  
2014 QE434   -   departed
Approximate diameter52 meters (H=24.078)
Closest Earth approach8.14 LD at 1104 UT on 16 Aug. 2014 - Note: JPL reports an approach uncertainty of +/- 12 minutes
Inside ten LD of Earth13 to 19 Aug. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 6 Sept. 2014 UTC
based on 12 observations spanning 5 days
Optical observation  
  • reported from 3 observing codes during 5.0106 days: 291, 568, F51
  • designation assigned to Pan-STARRS 1 observation at 1418 UT 30 Aug. 2014
  • last observed at 1433 UT on 4 Sept. 2014 by David Tholen's team on Mauna Kea
Links  
2014 QV296   -   distant observation
Approximate diameter59 meters (H=23.807)
Distance from Earth45.9 - 79.3 LD min-max during the observation period
Data based onJPL SSD orbit solution #5 downloaded from JPL on 17 Sept. 2014 UTC (dated 14 Sept. 2014 local)
based on 19 observations spanning 18 days
Optical observation  
  • reported from 6 observing codes during 17.9406 days: 291, 493, 568, F51, H21, H36
  • designation assigned to Pan-STARRS 1 observation at 1134 UT 27 Aug. 2014
  • last observed at 1009 UT on 14 Sept. 2014 by the Spacewatch 1.8m telescope
Notesprevious passage Feb. 2009 at 4.0 LD +/- 1.797 days uncertainty (unobserved)
Links  
2014 QS168   -   departed
Approximate diameter77 meters (H=23.21)
Closest Earth approach9.38 LD at 2050 UT on 7 Aug. 2014 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside ten LD of Earth5 to 10 Aug. 2014
Data based onJPL SSD orbit solution #7 downloaded from JPL on 16 Sept. 2014 UTC
based on 31 observations spanning 23 days
Optical observation  
  • reported from 9 observing codes during 23.2046 days: 157, 160, 703, 958, H21, J69, J75, J95, K38
  • designation assigned to La Sagra Obs. observation at 0033 UT 23 Aug. 2014
  • last observed at 0527 UT on 15 Sept. 2014 by ARO Westfield
Links  
2014 QY33   -   departed
Approximate diameter20 meters (H=26.156)
Closest Earth approach6.52 LD at 0801 UT on 30 Aug. 2014
Inside ten LD of Earth28 Aug. until 1 Sept. 2014
Data based onJPL SSD orbit solution #11 downloaded from JPL on 17 Sept. 2014 UTC (dated 15 Sept. 2014 local)
based on 31 observations spanning 7 days including radar
Optical observation  
  • reported from 5 observing codes during 6.4733 days: 568, F51, H36, J04, J69
  • designation assigned to Pan-STARRS 1 observation at 1016 UT 22 Aug. 2014
  • last observed at 2138 UT on 28 Aug. 2014 by North Obs.
Radar observation  
  • observed 6 times from one location during 0.0347 days
  • first observed at 0609 UT on 29 Aug. 2014 by Arecibo
  • last observed at 0659 UT on 29 Aug. 2014 by Arecibo
Links  
2014 QH33   -   departed
Approximate diameter44 meters (H=24.432)
Closest Earth approach6.69 LD at 2030 UT on 12 Aug. 2014
Inside ten LD of Earth6 to 18 Aug. 2014
Data based onJPL SSD orbit solution #12 downloaded from JPL on 17 Sept. 2014 UTC
based on 103 observations spanning 2005-2014
Optical observation  
  • reported from 13 observing codes during 26.2565 days: 474, 568, 703, 958, F51, G96, H21, H36, H45, I93, J75, J95, W88
  • designation assigned to La Sagra Obs. observation at 0208 UT 21 Aug. 2014
  • last observed at 0817 UT on 16 Sept. 2014 by Pan-STARRS 1
Notesother ID: 2005 CD69
Links  
2014 KD   -   departed
Approximate diameter45 meters (H=24.4)
Closest Earth approach7.74 LD at 0626 UT on 19 May 2014
Inside ten LD of Earth16 to 22 May 2014
Data based onJPL SSD orbit solution #7 downloaded from JPL on 19 Sept. 2014 UTC
based on 69 observations spanning 122 days
Optical observation  
  • reported from 12 observing codes during 122.1398 days: 204, 291, 434, 568, 900, 958, H21, H36, I41, I93, J95, U69
  • designation assigned to Palomar Transient Factory observation at 0714 UT 17 May 2014
  • last observed at 1035 UT on 16 Sept. 2014 by David Tholen's team on Mauna Kea
Links  
2013 RZ53   -   outbound
Approximate diameter2 meters (H=31.1)
Closest Earth approach1.90 LD at 0403 UT on 9 Sept. 2014 - Note: JPL reports an approach uncertainty of +/- 20 minutes
Inside Earth SOI4 to 13 Sept. 2014
Inside ten LD of Earth5 Aug. until 12 Oct. 2014
Closest Moon approach2.26 LD at 0407 UT on 5 Sept. 2014
Data based onJPL SSD orbit solution #6 downloaded from JPL on 21 July 2014 UTC (dated 13 June 2014 local)
based on 31 observations spanning 3 days
Optical observation  
    none recent
Notesrisk
previous passage Sept. 2013 at 0.63 LD
Links  
2011 TB4   -   approaching
Approximate diameter27 meters (H=25.5)
Closest Earth approach5.84 LD at 1535 UT on 9 Oct. 2014 - Note: JPL reports an approach uncertainty of +/- 1.821 days
Inside ten LD of Earth6 to 12 Oct. 2014
Data based onJPL SSD orbit solution #6 downloaded from JPL on 19 Sept. 2014 UTC (dated 13 June 2014 local)
based on 44 observations spanning 5 days
Optical observation  
    none recent
Notesprevious passage Oct. 2011 at 5.15 LD
Links  
2010 FV9   -   approaching
Approximate diameter28 meters (H=25.4)
Closest Earth approach8.67 LD at 2019 UT on 11 Oct. 2014
Inside ten LD of Earth8 to 14 Oct. 2014
Data based onJPL SSD orbit solution #15 downloaded from JPL on 19 Sept. 2014 UTC
based on 61 observations spanning 2010-2014
Optical observation  
  • reported from 3 observing codes during 23.426 hours: F51, H21, W87
  • first observed at 0812 UT on 17 Sept. 2014 by Pan-STARRS 1
  • last observed at 0738 UT on 18 Sept. 2014 by ARO Westfield
Notesprevious passage March 2010 at 7.35 LD
Links  
2009 RR   -   outbound
Approximate diameter27 meters (H=25.5)
Closest Earth approach1.95 LD at 1002 UT on 16 Sept. 2014 - Note: JPL reports an approach uncertainty of +/- 2.135 days
Inside Earth SOI15 to 16 Sept. 2014
Inside ten LD of Earth13 to 19 Sept. 2014
Closest Moon approach2.89 LD at 1218 UT on 16 Sept. 2014
Data based onJPL SSD orbit solution #9 downloaded from JPL on 1 Sept. 2014 UTC (dated 13 June 2014 local)
based on 35 observations spanning 4 days
Optical observation  
    none recent
Notesrisk
previous passage Sept. 2009 at 2.80 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.