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Legend - object IDs plus links to more info

Data compiled at 1957 UTC on 23 Oct. 2014 for thirteen known objects during a period of seven days from 20 to 26 Oct. 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 MF6186.78 LD  departed
RZ532013 RZ5312.0 LD+/- 20 minutes  departed
SC3242014 SC3241.47 LDinbound
SJ1422014 SJ14250.2 LD  distant
SS12014 SS167.05 LD  departed
TL2014 TL45.56 LD  departed intruder
TM342014 TM3424.65 LD  departed
TP572014 TP578.22 LDoutbound
TT352014 TT356.89 LD+/- one minuteoutbound
TV2014 TV6.10 LD  departed
UA82014 UA88.11 LDpassing
UR2014 UR3.27 LDoutbound
US72014 US76.32 LD  departed
DateTfc.Time
20 Oct. '14Rept. Line
21 Oct. '14Rept. Line
22 Oct. '14Rept. Line
23 Oct. '14Rept. Line
24 Oct. '14Rept. Line
25 Oct. '14 Line
26 Oct. '14 Line

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

2014 UA8   -   passing
Approximate diameter29 meters (H=25.322)
Closest Earth approach8.11 LD at 1706 UT on 23 Oct. 2014
Inside ten LD of Earth21 to 25 Oct. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 Oct. 2014 UTC
based on 24 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.6643 days: 291, 703, 958, J95
  • designation assigned to Catalina Sky Survey observation at 1006 UT 21 Oct. 2014
  • last observed at 0203 UT on 23 Oct. 2014 by Dax Obs.
Links  
2014 US7   -     departed
Approximate diameter17 meters (H=26.492)
Closest Earth approach4.23 LD at 1345 UT on 17 Oct. 2014
Inside ten LD of Earth12 to 22 Oct. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Oct. 2014 UTC
based on 48 observations spanning 3 days
Optical observation  
Notesrisk
Links  
2014 UR   -   outbound
Approximate diameter16 meters (H=26.589)
Closest Earth approach2.90 LD at 1148 UT on 18 Oct. 2014
Inside ten LD of Earth8 to 28 Oct. 2014
Data based onJPL SSD orbit solution #5 downloaded from JPL on 23 Oct. 2014 UTC
based on 135 observations spanning 5 days
Optical observation  
  • reported from 15 observing codes during 4.9558 days: 246, 568, 673, 703, 850, 926, 958, H21, H36, H45, I93, J04, J69, J95, Q62
  • designation assigned to Catalina Sky Survey observation at 0717 UT 17 Oct. 2014
  • last observed at 0614 UT on 22 Oct. 2014 by Petit Jean Mtn. South Obs.
Notesradar target
previous passage Oct. 2013 at 7.79 LD (unobserved)
Links  
2014 TP57   -   outbound
Approximate diameter18 meters (H=26.326)
Closest Earth approach8.22 LD at 1634 UT on 22 Oct. 2014
Inside ten LD of Earth18 to 27 Oct. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Oct. 2014 UTC
based on 25 observations spanning 7 days
Optical observation  
  • reported from 6 observing codes during 7.0891 days: 673, 703, 926, D90, G96, J69
  • first observed at 0516 UT on 15 Oct. 2014 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 0625 UT 15 Oct. 2014
  • last observed at 0724 UT on 22 Oct. 2014 by the Catalina Sky Survey
Links  
2014 TT35   -   outbound
Approximate diameter21 meters (H=26.046)
Closest Earth approach6.89 LD at 0206 UT on 22 Oct. 2014
Inside ten LD of Earth19 to 25 Oct. 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 17 Oct. 2014 UTC
based on 28 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.1159 days: 291, 926, G96, H36
  • designation assigned to Mt. Lemmon Survey observation at 0347 UT 14 Oct. 2014
  • last observed at 0634 UT on 16 Oct. 2014 by the Mt. Lemmon Survey
Links  
2014 TM34   -     departed
Approximate diameter37 meters (H=24.8)
Closest Earth approach9.59 LD at 1850 UT on 5 Oct. 2014
Inside ten LD of Earth3 to 7 Oct. 2014
Data based onJPL SSD orbit solution #7 downloaded from JPL on 22 Oct. 2014 UTC
based on 42 observations spanning 9 days
Optical observation  
  • reported from 9 observing codes during 8.8582 days: 448, 703, 718, 926, G96, H21, I93, K33, L04
  • designation assigned to Catalina Sky Survey observation at 1016 UT 12 Oct. 2014
  • last observed at 0652 UT on 21 Oct. 2014 by ARO Westfield
Links  
2014 TV   -     departed
Approximate diameter47 meters (H=24.3)
Closest Earth approach4.47 LD at 1141 UT on 18 Oct. 2014
Inside ten LD of Earth15 to 21 Oct. 2014
Data based onJPL SSD orbit solution #12 downloaded from JPL on 18 Oct. 2014 UTC
based on 40 observations spanning 16 days including radar
Optical observation  
  • reported from 9 observing codes during 15.6714 days: 291, 703, B18, F51, G40, G48, H01, H21, H45
  • designation assigned to Pan-STARRS 1 observation at 1304 UT 1 Oct. 2014
  • last observed at 0511 UT on 17 Oct. 2014 by B. Lutkenhoner via Slooh.com Canary Islands Obs.
Radar observation  
  • observed 2 times from one location during 0.0319 days
  • first observed at 0443 UT on 15 Oct. 2014 by Arecibo
  • last observed at 0529 UT on 15 Oct. 2014 by Arecibo
Notesradar target
Links  
2014 TL   -     departed intruder
Approximate diameter9 meters (H=27.8)
Closest Earth approach0.26 LD at 1557 UT on 1 Oct. 2014
Inside Earth-Moon system0628 on 1 Oct. until 0127 UT on 2 Oct. 2014
Inside Earth SOI30 Sept. until 2 Oct. 2014
Inside ten LD of Earth27 Sept. until 5 Oct. 2014
Closest Moon approach0.74 LD at 1549 UT on 1 Oct. 2014
Inside one LD of Moon0848-2249 UT on 1 Oct. 2014
Data based onJPL SSD orbit solution #5 downloaded from JPL on 23 Oct. 2014 UTC
based on 48 observations spanning 19 days
Optical observation  
  • reported from 9 observing codes during 19.1426 days: 291, 510, 568, 585, 703, H01, H06, J95, Q62
  • designation assigned to Catalina Sky Survey observation at 0624 UT 2 Oct. 2014
  • last observed at 0950 UT on 21 Oct. 2014 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2014 SC324   -   inbound
Approximate diameter51 meters (H=24.1)
Closest Earth approach1.47 LD at 1919 UT on 24 Oct. 2014
Inside Earth SOI23 to 25 Oct. 2014
Inside ten LD of Earth20 to 29 Oct. 2014
Closest Moon approach2.22 LD at 0114 UT on 25 Oct. 2014
Data based onJPL SSD orbit solution #13 downloaded from JPL on 23 Oct. 2014 UTC
based on 237 observations spanning 23 days
Optical observation  
  • reported from 33 observing codes during 23.0505 days: 157, 246, 291, 448, 470, 568, 587, 673, 691, 703, 711, 718, 807, 850, 958, C47, C77, F51, G40, G56, G96, H01, H06, H21, H36, H45, J69, J95, Q62, V78, W19, W88, Y00
  • designation assigned to Mt. Lemmon Survey observation at 0652 UT 30 Sept. 2014
  • last observed at 0804 UT on 23 Oct. 2014 by iTelescope Obs. Mayhill
Notesradar target
Links  
2014 SJ142   -     distant
Approximate diameter78 meters (H=23.2)
Distance from Earth54.5 - 109.3 LD min-max during the observation period
Data based onJPL SSD orbit solution #9 downloaded from JPL on 19 Oct. 2014 UTC
based on 34 observations spanning 30 days
Optical observation  
  • reported from 4 observing codes during 29.8238 days: 291, F51, H21, J04
  • designation assigned to Pan-STARRS 1 observation at 0755 UT 19 Sept. 2014
  • last observed at 0341 UT on 19 Oct. 2014 by the Spacewatch 1.8m telescope
Notesprevious passage March 2011 at 5.3 LD +/- 1.678 days uncertainty (unobserved)
Links  
2014 SS1   -     departed
Approximate diameter148 meters (H=21.8)
Closest Earth approach7.04 LD at 2007 UT on 10 Sept. 2014
Inside ten LD of Earth6 to 15 Sept. 2014
Data based onJPL SSD orbit solution #24 downloaded from JPL on 22 Oct. 2014 UTC
based on 237 observations spanning 41 days
Optical observation  
  • reported from 30 observing codes during 40.8653 days: 089, 118, 151, 160, 291, 300, 448, 691, 703, 718, 850, 932, 958, C23, C77, D00, F51, G40, H06, H21, H36, H45, I15, I39, I93, J16, L04, N42, Q62, U69
  • first observed at 0921 UT on 10 Sept. 2014 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1009 UT 19 Sept. 2014
  • last observed at 0607 UT on 21 Oct. 2014 by ARO Westfield
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 #16 downloaded from JPL on 23 Oct. 2014 UTC
based on 118 observations spanning 127 days
Optical observation  
  • reported from 19 observing codes during 126.9170 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 0715 UT on 23 Oct. 2014 by ARO Westfield
Links  
2013 RZ53   -     departed
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  

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.