Earth's Busy Neighborhood banner
Sample screen shot from A/CC's animated HTML5 Skychart Viewer.
Sample screen shot from
A/CC's Skychart Viewer
which requires HTML5
and JavaScript run in
browsers such as
FireFox 3.6.3+, IE10,
Opera, or Safari.

Legend - object IDs plus links to more info

Data compiled at 1702 UTC on 20 Oct. 2014 for eleven known objects during a period of seven days from 17 to 23 Oct. 2014. Orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
RZ532013 RZ5311.2 LD+/- 20 minutes  departed
SC3242014 SC3242.33 LDinbound
SJ1422014 SJ14250.2 LD  distant
SS12014 SS161.30 LD  departed
TG182014 TG1874.21 LD  departed
TM342014 TM3420.23 LD  departed
TP572014 TP578.23 LDinbound
TR2014 TR11.18 LD+/- 3 minutes  departed
TT352014 TT356.89 LD+/- one minuteinbound
TV2014 TV4.47 LDoutbound
UR2014 UR2.90 LDoutbound
DateTfc.Time
17 Oct. '14Rept. Line
18 Oct. '14Rept. Line
19 Oct. '14Rept. Line
20 Oct. '14Rept. Line
21 Oct. '14Rept. Line
22 Oct. '14 Line
23 Oct. '14 Line

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

2014 UR   -   outbound
Approximate diameter17 meters (H=26.548)
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 #3 downloaded from JPL on 20 Oct. 2014 UTC
based on 107 observations spanning 3 days
Optical observation  
  • reported from 12 observing codes during 3.1421 days: 246, 673, 703, 926, 958, H21, H36, H45, I93, J04, J95, Q62
  • designation assigned to Catalina Sky Survey observation at 0717 UT 17 Oct. 2014
  • last observed at 1042 UT on 20 Oct. 2014 by Jana Pittichova via Table Mtn. Obs.
Notesprevious passage Oct. 2013 at 7.81 LD (unobserved)
Links  
2014 TP57   -   inbound
Approximate diameter18 meters (H=26.386)
Closest Earth approach8.23 LD at 1633 UT on 22 Oct. 2014
Inside ten LD of Earth18 to 27 Oct. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 20 Oct. 2014 UTC
based on 17 observations spanning 5 days
Optical observation  
  • reported from 4 observing codes during 5.0319 days: 673, 926, D90, G96
  • 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 0602 UT on 20 Oct. 2014 by Jana Pittichova via Table Mtn. Obs.
Links  
2014 TT35   -   inbound
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 #5 downloaded from JPL on 19 Oct. 2014 UTC
based on 36 observations spanning 5 days
Optical observation  
  • reported from 9 observing codes during 4.9034 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 0757 UT on 17 Oct. 2014 by ARO Westfield
Links  
2014 TG18   -     departed
Approximate diameter117 meters (H=22.317)
Closest Earth approach9.19 LD at 0341 UT on 27 Sept. 2014
Inside ten LD of Earth26 to 28 Sept. 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 12 Oct. 2014 UTC
based on 28 observations spanning 9 days
Optical observation  
  • reported from 5 observing codes during 8.9812 days: 807, D90, K91, Q62, Y00
  • designation assigned to SONEAR Obs. observation at 0629 UT 3 Oct. 2014
  • last observed at 0602 UT on 12 Oct. 2014 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2014 TV   -   outbound
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 TR   -     departed
Approximate diameter12 meters (H=27.308)
Closest Earth approach9.86 LD at 1436 UT on 11 Oct. 2014 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth9 to 13 Oct. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 3 Oct. 2014 UTC
based on 24 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 2.0061 days: 291, 493, G96
  • designation assigned to Mt. Lemmon Survey observation at 0701 UT 1 Oct. 2014
  • last observed at 0709 UT on 3 Oct. 2014 by the Mt. Lemmon Survey
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 #10 downloaded from JPL on 20 Oct. 2014 UTC
based on 145 observations spanning 20 days
Optical observation  
  • reported from 22 observing codes during 20.0625 days: 157, 246, 291, 448, 568, 673, 703, 711, 718, 807, 958, C47, F51, G40, G96, H01, H21, H36, H45, J69, J95, V78
  • designation assigned to Mt. Lemmon Survey observation at 0652 UT 30 Sept. 2014
  • last observed at 0822 UT on 20 Oct. 2014 by the Spacewatch 1.8m telescope
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 #23 downloaded from JPL on 19 Oct. 2014 UTC
based on 228 observations spanning 38 days
Optical observation  
  • reported from 30 observing codes during 38.4769 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 2048 UT on 18 Oct. 2014 by Eschenberg Obs.
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.