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Legend - object IDs plus links to more info

Data compiled at 2154 UTC on 17 Jan. 2017 for nineteen known objects during a period of seven days from 14 to 20 Jan. 2017. 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
AE32017 AE371.51 LD  departed
AF132017 AF1312.99 LD  departed
AG52017 AG528.21 LD  departed
AG132017 AG1315.68 LD  departed intruder
AH52017 AH591.0 LD+/- 26 minutes  departed
AJ132017 AJ136.71 LDoutbound
AK132017 AK1328.14 LD  departed
AO42017 AO434.14 LD+/- 2 minutes  departed
AP42017 AP422.72 LD  departed
AP192017 AP1918.87 LD  departed
AS42017 AS422.01 LD  departed
AZ32017 AZ38.93 LD  departed
DT1032007 DT103399.0 LD  distant
FK2013 FK31.20 LDapproaching
VL12005 VL121.4 LD+/- 15.0000 hoursapproaching
XH162007 XH16137.4 LD  distant
YC82016 YC89.47 LDinbound
YC132016 YC1373.2 LD+/- 10.0500 hours  departed
YR2016 YR11.27 LD+/- 4 minutes  departed
DateTfc.Time
14 Jan. '17Rept. Line
15 Jan. '17Rept. Line
16 Jan. '17Rept. Line
17 Jan. '17Rept. Line
18 Jan. '17Rept. Line
19 Jan. '17 Line
20 Jan. '17 Line

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

2017 AP19   -     departed
Approximate diameter63 meters (H=23.647)
Closest Earth approach3.35 LD at 1619 UT on 6 Jan. 2017
Inside ten LD of Earth2 to 10 Jan. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 17 Jan. 2017 UTC
based on 74 observations spanning 7 days
Optical observation  
  • reported from 8 observing codes during 6.6362 days: 118, 300, H01, J95, T04, T05, V37, Z21
  • designation assigned to ATLAS Haleakala observation at 1441 UT 9 Jan. 2017
  • last observed at 0557 UT on 16 Jan. 2017 by LCOGT Tenerife Aqawan A#1
Links  
2017 AK13   -     departed
Approximate diameter66 meters (H=23.553)
Closest Earth approach8.76 LD at 1931 UT on 3 Jan. 2017
Inside ten LD of Earth1 to 5 Jan. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 10 Jan. 2017 UTC
based on 101 observations spanning 2 days
Optical observation  
  • reported from 21 observing codes during 2.5884 days: 160, 204, 300, 587, 595, 691, 926, 958, B04, C44, C77, G96, H21, I52, I93, J69, K30, K33, K51, Z80, Z84
  • designation assigned to Mt. Lemmon Survey observation at 0743 UT 7 Jan. 2017
  • last observed at 2150 UT on 9 Jan. 2017 by North Obs.
Links  
2017 AJ13   -   outbound
Approximate diameter50 meters (H=24.166)
Closest Earth approach6.71 LD at 1053 UT on 14 Jan. 2017
Inside ten LD of Earth11 to 17 Jan. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 16 Jan. 2017 UTC
based on 56 observations spanning 7 days
Optical observation  
  • reported from 14 observing codes during 7.7299 days: 160, 204, 595, 691, 926, 958, E23, G96, H21, I52, I93, J69, J95, K51
  • designation assigned to Mt. Lemmon Survey observation at 0535 UT 7 Jan. 2017
  • last observed at 2306 UT on 14 Jan. 2017 by North Obs.
Links  
2017 AG13   -     departed intruder
Approximate diameter21 meters (H=26.039)
Closest Earth approach0.54 LD at 1249 UT on 9 Jan. 2017
Inside Earth-Moon system0705-1833 UT on 9 Jan. 2017
Inside Earth SOI8 to 10 Jan. 2017
Inside ten LD of Earth6 to 12 Jan. 2017
Closest Moon approach1.38 LD at 1035 UT on 9 Jan. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 11 Jan. 2017 UTC
based on 62 observations spanning 2 days
Optical observation  
  • reported from 11 observing codes during 2.2150 days: 204, 703, 958, B49, C44, G96, H21, I52, I93, K65, W25
  • designation assigned to Catalina Sky Survey observation at 0739 UT 7 Jan. 2017
  • last observed at 1249 UT on 9 Jan. 2017 by the Mt. Lemmon Survey
Links  
2017 AF13   -     departed
Approximate diameter17 meters (H=26.517)
Closest Earth approach2.81 LD at 0006 UT on 6 Jan. 2017
Inside ten LD of Earth30 Dec. until 12 Jan. 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 10 Jan. 2017 UTC
based on 50 observations spanning 2 days
Optical observation  
  • reported from 11 observing codes during 2.0305 days: 160, 204, 691, 926, 958, G96, I52, I93, Q62, Y00, Z84
  • designation assigned to Mt. Lemmon Survey observation at 0514 UT 7 Jan. 2017
  • last observed at 0558 UT on 9 Jan. 2017 by Tenagra II Obs.
NotesNHATS target
Links  
2017 AH5   -     departed
Approximate diameter47 meters (H=24.3)
Closest Earth approach8.18 LD at 0932 UT on 26 Dec. 2016 - Note: JPL reports an approach uncertainty of +/- 26 minutes
Inside ten LD of Earth25 to 27 Dec. 2016
Data based onJPL SSD orbit solution #1 downloaded from JPL on 7 Jan. 2017 UTC
based on 24 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.0317 days: 658, 926, G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0351 UT 5 Jan. 2017
  • last observed at 0437 UT on 7 Jan. 2017 by Tenagra II Obs.
Links  
2017 AG5   -     departed
Approximate diameter111 meters (H=22.415)
Closest Earth approach4.57 LD at 2145 UT on 30 Dec. 2016
Inside ten LD of Earth26 Dec. until 4 Jan. 2017
Data based onJPL SSD orbit solution #6 downloaded from JPL on 17 Jan. 2017 UTC
based on 364 observations spanning 11 days
Optical observation  
  • reported from 53 observing codes during 11.4386 days: 104, 107, 118, 160, 203, 204, 300, 510, 587, 595, 658, 718, 926, 958, A48, B49, B96, C23, C27, C42, C43, C44, C77, F51, G45, G96, H36, H45, I15, I52, I57, I58, I89, I93, J08, J67, J69, J95, K26, K30, K32, K33, K38, K61, K63, K80, L04, T05, Y00, Z45, Z48, Z80, Z98
  • first observed at 0137 UT on 5 Jan. 2017 by the Space Surveillance Telescope Atom Site
  • designation assigned to Mt. Lemmon Survey observation at 0350 UT 5 Jan. 2017
  • last observed at 1209 UT on 16 Jan. 2017 by Pan-STARRS 1
NotesNHATS target
Links  
2017 AS4   -     departed
Approximate diameter16 meters (H=26.578)
Closest Earth approach1.46 LD at 1704 UT on 8 Jan. 2017
Inside Earth SOI8 to 9 Jan. 2017
Inside ten LD of Earth6 to 11 Jan. 2017
Closest Moon approach2.14 LD at 1345 UT on 8 Jan. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 11 Jan. 2017 UTC
based on 46 observations spanning 2 days
Optical observation  
  • reported from 11 observing codes during 2.1755 days: 104, 160, 203, 204, 587, 658, 926, G96, I52, I93, K30
  • designation assigned to Mt. Lemmon Survey observation at 0537 UT 5 Jan. 2017
  • last observed at 0949 UT on 7 Jan. 2017 by Tenagra II Obs.
Links  
2017 AP4   -     departed
Approximate diameter14 meters (H=26.897)
Closest Earth approach2.24 LD at 0117 UT on 1 Jan. 2017
Inside Earth SOI31 Dec. until 1 Jan. 2017
Inside ten LD of Earth26 Dec. until 6 Jan. 2017
Closest Moon approach2.44 LD at 1417 UT on 31 Dec. 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 9 Jan. 2017 UTC
based on 12 observations spanning 5 days
Optical observation  
  • reported from 4 observing codes during 4.8619 days: 695, 926, F51, J95
  • designation assigned to Pan-STARRS 1 observation at 1140 UT 4 Jan. 2017
  • last observed at 0821 UT on 9 Jan. 2017 by Spacewatch via Kitt Peak Natl. Obs.
Notesrisk
Links  
2017 AO4   -     departed
Approximate diameter35 meters (H=24.932)
Closest Earth approach5.71 LD at 0324 UT on 26 Dec. 2016 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth21 to 30 Dec. 2016
Data based onJPL SSD orbit solution #5 downloaded from JPL on 12 Jan. 2017 UTC
based on 52 observations spanning 5 days
Optical observation  
  • reported from 11 observing codes during 4.9715 days: 204, 291, 587, 595, 926, C42, G96, H21, I52, I93, J95
  • designation assigned to Mt. Lemmon Survey observation at 1035 UT 4 Jan. 2017
  • last observed at 0954 UT on 9 Jan. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 AZ3   -     departed
Approximate diameter3 meters (H=29.986)
Closest Earth approach1.29 LD at 0252 UT on 7 Jan. 2017
Inside Earth SOI5 to 8 Jan. 2017
Inside ten LD of Earth30 Dec. until 14 Jan. 2017
Closest Moon approach1.80 LD at 1958 UT on 6 Jan. 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 7 Jan. 2017 UTC
based on 33 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 2.1153 days: 104, 204, 595, 926, G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0633 UT 5 Jan. 2017
  • last observed at 0919 UT on 7 Jan. 2017 by Tenagra II Obs.
NotesNHATS target
Links  
2017 AE3   -     departed
Approximate diameter149 meters (H=21.789)
Closest Earth approach8.47 LD at 1347 UT on 28 Dec. 2016
Inside ten LD of Earth27 to 29 Dec. 2016
Data based onJPL SSD orbit solution #6 downloaded from JPL on 9 Jan. 2017 UTC
based on 109 observations spanning 6 days
Optical observation  
  • reported from 22 observing codes during 5.7253 days: 160, 204, 291, 300, 595, 926, B49, C23, E23, G96, H21, H45, I52, I93, J69, J95, K38, K65, Q62, T05, W25, Z80
  • first observed at 1019 UT on 2 Jan. 2017 by ATLAS Haleakala
  • designation assigned to ATLAS Haleakala observation at 1022 UT 2 Jan. 2017
  • last observed at 0344 UT on 8 Jan. 2017 by Petit Jean Mtn. South Obs.
Links  
2016 YC13   -     departed
Approximate diameter15 meters (H=26.705)
Closest Earth approach5.79 LD at 2145 UT on 21 Dec. 2016 - Note: JPL reports an approach uncertainty of +/- 10.0500 hours
Inside ten LD of Earth19 to 24 Dec. 2016
Data based onJPL SSD orbit solution #1 downloaded from JPL on 9 Jan. 2017 UTC (dated 7 Jan. 2017 local)
based on 19 observations
Optical observation  
  • reported from 3 observing codes during 2.640 hours: G96, H01, I52
  • designation assigned to Mt. Lemmon Survey observation at 0652 UT 27 Dec. 2016
  • last observed at 0930 UT on 27 Dec. 2016 by Magdalena Ridge Obs.
Notesrisk
Links  
2016 YC8   -   inbound
Approximate diameter41 meters (H=24.595)
Closest Earth approach9.47 LD at 0439 UT on 18 Jan. 2017
Inside ten LD of Earth16 to 20 Jan. 2017
Data based onJPL SSD orbit solution #11 downloaded from JPL on 14 Jan. 2017 UTC
based on 81 observations spanning 2016-2017
Optical observation  
  • reported from 18 observing codes during 17.6008 days: 033, 203, 204, 246, 291, 587, 595, 695, G96, H01, H21, I52, I93, J69, K51, K88, T12, Z84
  • designation assigned to Mt. Lemmon Survey observation at 0836 UT 27 Dec. 2016
  • last observed at 2301 UT on 13 Jan. 2017 by GiaGa Obs.
NotesNHATS target
Links  
2016 YR   -     departed
Approximate diameter12 meters (H=27.199)
Closest Earth approach7.16 LD at 0458 UT on 27 Dec. 2016 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside ten LD of Earth14 Dec. until 10 Jan. 2017
Data based onJPL SSD orbit solution #5 downloaded from JPL on 2 Jan. 2017 UTC
based on 49 observations spanning 2016-2017
Optical observation  
  • reported from 9 observing codes during 13.6693 days: 033, 113, 705, G96, H01, H21, I52, J69, K88
  • designation assigned to Mt. Lemmon Survey observation at 0433 UT 19 Dec. 2016
  • last observed at 2037 UT on 1 Jan. 2017 by Schwarzschild Obs.
NotesNHATS target
Links  
2013 FK   -   approaching
Approximate diameter74 meters (H=23.3)
Closest Earth approach7.10 LD at 1732 UT on 5 Feb. 2017
Inside ten LD of Earth2 to 9 Feb. 2017
Data based onJPL SSD orbit solution #15 downloaded from JPL on 11 Jan. 2017 UTC
based on 75 observations spanning 2013-2017
Optical observation  
  • reported from 4 observing codes during 10.9330 days: 033, 204, G96, H01
  • first observed at 0452 UT on 27 Dec. 2016 by the Mt. Lemmon Survey
  • last observed at 0315 UT on 7 Jan. 2017 by the Mt. Lemmon Survey
Notesprevious passage March 2013 at 7.42 LD
Links  
2007 XH16   -     distant
Approximate diameter389 meters (H=19.7)
Distance from Earth135.7 - 155.6 LD min-max during the observation period
Data based onJPL SSD orbit solution #43 downloaded from JPL on 11 Jan. 2017 UTC
based on 300 observations spanning 2007-2017 including radar
Optical observation  
  • reported from 2 observing codes during 28.3472 days: 204, C51
  • first observed at 1027 UT on 6 Dec. 2016 by WISE
  • last observed at 1847 UT on 3 Jan. 2017 by Schiaparelli Obs.
Notesprevious passage Dec. 2007 at 8.10 LD, observation May-June 2008, observation July 2012, and observation Sept. 2016
Links  
2007 DT103   -     distant
Approximate diameter490 meters (H=19.2)
Distance from Earth568.5 LD during the observation period
Data based onJPL SSD orbit solution #73 downloaded from JPL on 9 Jan. 2017 UTC
based on 774 observations spanning 2007-2017 including radar
Optical observation  
  • reported from one observing code during 0.106 hours: 695
  • first observed at 1207 UT on 9 Jan. 2017 by Spacewatch via Kitt Peak Natl. Obs.
  • last observed at 1213 UT on 9 Jan. 2017 by Spacewatch via Kitt Peak Natl. Obs.
Notesprevious passage July 2007 at 9.26 LD and observation Feb. 2010
Links  
2005 VL1   -   approaching
Approximate diameter13 meters (H=27.)
Closest Earth approach9.08 LD at 0918 UT on 4 Feb. 2017 - Note: JPL reports an approach uncertainty of +/- 15.0000 hours
Inside ten LD of Earth1 to 7 Feb. 2017
Data based onJPL SSD orbit solution #12 downloaded from JPL on 31 Dec. 2016 UTC (dated 13 June 2014 local)
based on 40 observations spanning 17 days
Optical observation  
    none recent
Notesrisk, NHATS target
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.