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Legend - object IDs plus links to more info

Data compiled at 2104 UTC on 27 Jan. 2015 for 27 known objects during a period of seven days from 24 to 30 Jan. 2015. Orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
AF442015 AF4431.25 LD  departed
AH442015 AH4423.15 LD  departed
AK452015 AK454.73 LDoutbound
AQ432015 AQ4326.32 LD  departed intruder
AZ432015 AZ4326.50 LD+/- 4 minutesapproaching
BC2015 BC17.12 LD  departed
BE922015 BE923.24 LDinbound
BF2015 BF9.31 LD  departed
BF922015 BF9226.6 LD+/- 26 minutesapproaching
BK42015 BK45.32 LDoutbound
BK5102015 BK51019.27 LD+/- 3 minutes  departed
BL86357439 2004 BL863.12 LDoutbound
BL3112015 BL31158.13 LD  departed
BM42015 BM416.49 LD  departed
BP2015 BP11.02 LD  departed
BP5092015 BP50915.78 LD  departed
BY32015 BY344.85 LD+/- one minute  departed Moon buzzer
BZ32015 BZ314.75 LD  departed
CQ2008 CQ4.8 LD+/- 2.223 daysinbound
WD3662014 WD36686.31 LD  departed
WO3652014 WO365127.78 LD  departed
WR3622014 WR362213.50 LD  departed
WY3622014 WY362241.7 LD+/- 37 minutes  departed
YA92014 YA988.98 LD  departed
YD12014 YD198.21 LD  departed
YL422014 YL42124.23 LD  departed
YS152014 YS1592.7 LD+/- 9 minutes  departed
DateTfc.Time
24 Jan. '15Rept. Line
25 Jan. '15Rept. Line
26 Jan. '15Rept. Line
27 Jan. '15Rept. Line
28 Jan. '15Rept. Line
29 Jan. '15 Line
30 Jan. '15 Line

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

2015 BK510   -     departed
Approximate diameter24 meters (H=25.714)
Closest Earth approach7.14 LD at 0912 UT on 19 Jan. 2015 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth17 to 21 Jan. 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 26 Jan. 2015 UTC
based on 14 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.9033 days: F51, H01, H36, I93
  • designation assigned to Pan-STARRS 1 observation at 1146 UT 24 Jan. 2015
  • last observed at 0927 UT on 26 Jan. 2015 by Magdalena Ridge Obs.
Links  
2015 BP509   -     departed
Approximate diameter8 meters (H=28.026)
Closest Earth approach1.67 LD at 1212 UT on 19 Jan. 2015
Inside Earth SOI19 to 20 Jan. 2015
Inside ten LD of Earth16 to 22 Jan. 2015
Closest Moon approach1.86 LD at 0609 UT on 19 Jan. 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 Jan. 2015 UTC
based on 10 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 2.8750 days: 291, F51, H21
  • designation assigned to Pan-STARRS 1 observation at 0806 UT 21 Jan. 2015
  • last observed at 0506 UT on 24 Jan. 2015 by ARO Westfield
Links  
2015 BL311   -     departed
Approximate diameter212 meters (H=21.019)
Closest Earth approach9.63 LD at 0300 UT on 15 Jan. 2015
Inside ten LD of Earth14 to 15 Jan. 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 25 Jan. 2015 UTC
based on 90 observations spanning 3 days
Optical observation  
  • reported from 20 observing codes during 3.8972 days: 033, 123, 203, 474, 850, 958, C23, C77, C94, E23, F51, G48, H36, I39, J08, J95, K32, O75, W88, Y00
  • designation assigned to SONEAR Obs. observation at 0053 UT 21 Jan. 2015
  • last observed at 2225 UT on 24 Jan. 2015 by GiaGa Obs.
Links  
2015 BF92   -   approaching
Approximate diameter51 meters (H=24.12)
Closest Earth approach8.53 LD at 2204 UT on 7 Feb. 2015 - Note: JPL reports an approach uncertainty of +/- 26 minutes
Inside ten LD of Earth6 to 9 Feb. 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Jan. 2015 UTC
based on 17 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 3.0906 days: 291, 474, F51
  • designation assigned to Pan-STARRS 1 observation at 1026 UT 19 Jan. 2015
  • last observed at 1236 UT on 22 Jan. 2015 by Mt. John Obs.
Links  
2015 BE92   -   inbound
Approximate diameter8 meters (H=28.079)
Closest Earth approach3.24 LD at 0124 UT on 29 Jan. 2015
Inside ten LD of Earth22 Jan. until 5 Feb. 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 25 Jan. 2015 UTC
based on 69 observations spanning 10 days
Optical observation  
  • reported from 7 observing codes during 9.8275 days: 474, F51, G96, H36, J95, K91, W86
  • first observed at 0923 UT on 14 Jan. 2015 by Pan-STARRS 1
  • designation assigned to Mt. Lemmon Survey observation at 0700 UT 19 Jan. 2015
  • last observed at 0515 UT on 24 Jan. 2015 by LCOGT Cerro Tololo B
Links  
2015 BM4   -     departed
Approximate diameter62 meters (H=23.688)
Closest Earth approach1.44 LD at 0341 UT on 15 Jan. 2015
Inside Earth SOI14 to 16 Jan. 2015
Inside ten LD of Earth9 to 20 Jan. 2015
Closest Moon approach1.56 LD at 1151 UT on 15 Jan. 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 26 Jan. 2015 UTC
based on 67 observations spanning 8 days
Optical observation  
  • reported from 12 observing codes during 8.0706 days: 448, 568, 703, 807, F51, G96, H01, H06, H21, H36, J95, Y00
  • designation assigned to Catalina Sky Survey observation at 0930 UT 18 Jan. 2015
  • last observed at 1112 UT on 26 Jan. 2015 by Sandlot Obs.
Links  
2015 BK4   -   outbound
Approximate diameter35 meters (H=24.898)
Closest Earth approach5.32 LD at 0124 UT on 25 Jan. 2015
Inside ten LD of Earth21 to 28 Jan. 2015
Data based onJPL SSD orbit solution #4 downloaded from JPL on 23 Jan. 2015 UTC
based on 47 observations spanning 10 days
Optical observation  
  • reported from 11 observing codes during 9.6874 days: 104, 203, 448, 474, 958, F51, G96, H01, H21, H36, J69
  • first observed at 0831 UT on 13 Jan. 2015 by Pan-STARRS 1
  • designation assigned to Mt. Lemmon Survey observation at 0719 UT 18 Jan. 2015
  • last observed at 0101 UT on 23 Jan. 2015 by North Obs.
Links  
2015 BZ3   -     departed
Approximate diameter10 meters (H=27.553)
Closest Earth approach1.32 LD at 1057 UT on 15 Jan. 2015
Inside Earth SOI14 to 16 Jan. 2015
Inside ten LD of Earth9 to 21 Jan. 2015
Closest Moon approach1.41 LD at 1300 UT on 15 Jan. 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Jan. 2015 UTC
based on 33 observations spanning 4 days
Optical observation  
  • reported from 10 observing codes during 4.3438 days: 474, 703, 807, F51, G40, G96, H01, H21, H36, J04
  • designation assigned to Catalina Sky Survey observation at 0734 UT 17 Jan. 2015
  • last observed at 1549 UT on 21 Jan. 2015 by Mt. John Obs.
Links  
2015 BY3   -     departed Moon buzzer
Approximate diameter11 meters (H=27.502)
Closest Earth approach1.43 LD at 0113 UT on 12 Jan. 2015
Inside Earth SOI11 to 12 Jan. 2015
Inside ten LD of Earth9 to 14 Jan. 2015
Closest Moon approach0.82 LD at 0250 UT on 12 Jan. 2015
Inside one LD of Moon2323 on 11 Jan. until 0617 UT on 12 Jan. 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 25 Jan. 2015 UTC
based on 23 observations spanning 6 days
Optical observation  
  • reported from 4 observing codes during 6.2083 days: 568, G96, H01, H21
  • designation assigned to Mt. Lemmon Survey observation at 0619 UT 17 Jan. 2015
  • last observed at 1119 UT on 23 Jan. 2015 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2015 BP   -     departed
Approximate diameter8 meters (H=28.14)
Closest Earth approach1.81 LD at 0416 UT on 20 Jan. 2015
Inside Earth SOI19 to 20 Jan. 2015
Inside ten LD of Earth16 to 23 Jan. 2015
Closest Moon approach2.14 LD at 1018 UT on 20 Jan. 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 20 Jan. 2015 UTC
based on 32 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 1.1469 days: 033, 203, G96
  • designation assigned to Mt. Lemmon Survey observation at 0743 UT 17 Jan. 2015
  • last observed at 1115 UT on 18 Jan. 2015 by the Mt. Lemmon Survey
Links  
2015 BF   -     departed
Approximate diameter17 meters (H=26.481)
Closest Earth approach9.31 LD at 1027 UT on 25 Jan. 2015
Inside ten LD of Earth23 to 26 Jan. 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 22 Jan. 2015 UTC
based on 11 observations spanning 5 days
Optical observation  
  • reported from 4 observing codes during 5.0888 days: 291, 474, 568, F51
  • designation assigned to Pan-STARRS 1 observation at 0808 UT 16 Jan. 2015
  • last observed at 1016 UT on 21 Jan. 2015 by Mt. John Obs.
Links  
2015 BC   -     departed
Approximate diameter49 meters (H=24.188)
Closest Earth approach1.64 LD at 0348 UT on 20 Jan. 2015
Inside Earth SOI19 to 20 Jan. 2015
Inside ten LD of Earth17 to 22 Jan. 2015
Closest Moon approach1.50 LD at 0812 UT on 20 Jan. 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Jan. 2015 UTC
based on 85 observations spanning one day
Optical observation  
  • reported from 16 observing codes during 1.4317 days: 300, 461, 474, 673, 703, 807, 850, D90, E23, G48, G96, H01, H21, J95, W95, Z99
  • first observed at 0448 UT on 16 Jan. 2015 by Panamanian San Pedro Atacama Obs.
  • designation assigned to Catalina Sky Survey observation at 0546 UT 16 Jan. 2015
  • last observed at 1510 UT on 17 Jan. 2015 by Bisei Spaceguard Center
Links  
2015 AK45   -   outbound
Approximate diameter18 meters (H=26.43)
Closest Earth approach4.73 LD at 2111 UT on 26 Jan. 2015
Inside ten LD of Earth22 to 31 Jan. 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 25 Jan. 2015 UTC
based on 33 observations spanning 9 days
Optical observation  
  • reported from 7 observing codes during 9.1160 days: 203, 291, 474, 568, F51, G37, H21
  • designation assigned to Pan-STARRS 1 observation at 0855 UT 15 Jan. 2015
  • last observed at 1142 UT on 24 Jan. 2015 by Mt. John Obs.
Links  
2015 AH44   -     departed
Approximate diameter43 meters (H=24.484)
Closest Earth approach7.83 LD at 2327 UT on 14 Jan. 2015
Inside ten LD of Earth12 to 17 Jan. 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 20 Jan. 2015 UTC
based on 41 observations spanning 4 days
Optical observation  
  • reported from 10 observing codes during 4.1178 days: 033, 300, G40, H21, I41, J95, K30, K61, L04, Z99
  • designation assigned to Palomar Transient Factory observation at 0825 UT 15 Jan. 2015
  • last observed at 1115 UT on 19 Jan. 2015 by ARO Westfield
Links  
2015 AF44   -     departed
Approximate diameter28 meters (H=25.435)
Closest Earth approach4.62 LD at 0349 UT on 12 Jan. 2015
Inside ten LD of Earth8 to 15 Jan. 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 26 Jan. 2015 UTC
based on 75 observations spanning 5 days
Optical observation  
  • reported from 13 observing codes during 5.0061 days: 033, 291, 448, 461, 703, G40, G48, H21, H36, I41, J95, O75, Z99
  • designation assigned to Catalina Sky Survey observation at 0539 UT 15 Jan. 2015
  • last observed at 0548 UT on 20 Jan. 2015 by Desert Moon Obs.
Links  
2015 AZ43   -   approaching
Approximate diameter69 meters (H=23.444)
Closest Earth approach7.68 LD at 1238 UT on 15 Feb. 2015 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside ten LD of Earth11 to 19 Feb. 2015
Data based onJPL SSD orbit solution #6 downloaded from JPL on 27 Jan. 2015 UTC
based on 32 observations spanning 13 days
Optical observation  
  • reported from 6 observing codes during 12.8223 days: 291, 568, F51, H21, H36, J04
  • designation assigned to Pan-STARRS 1 observation at 0920 UT 11 Jan. 2015
  • last observed at 0504 UT on 24 Jan. 2015 by ARO Westfield
Notesrisk
Links  
2015 AQ43   -     departed intruder
Approximate diameter8 meters (H=28.152)
Closest Earth approach0.41 LD at 1319 UT on 14 Jan. 2015
Inside Earth-Moon system0527-2111 UT on 14 Jan. 2015
Inside Earth SOI13 to 15 Jan. 2015
Inside ten LD of Earth10 to 18 Jan. 2015
Closest Moon approach1.43 LD at 1310 UT on 14 Jan. 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 17 Jan. 2015 UTC
based on 17 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 1.4197 days: 033, 703, J95
  • designation assigned to Catalina Sky Survey observation at 1033 UT 15 Jan. 2015
  • last observed at 2038 UT on 16 Jan. 2015 by Great Shefford Obs.
Notesprevious passage Jan. 2010 at 1.3 LD +/- 1.723 days uncertainty (unobserved)
Links  
2014 YL42   -     departed
Approximate diameter35 meters (H=24.9)
Closest Earth approach1.60 LD at 1420 UT on 27 Dec. 2014
Inside Earth SOI27 to 28 Dec. 2014
Inside ten LD of Earth25 to 29 Dec. 2014
Closest Moon approach1.80 LD at 1218 UT on 27 Dec. 2014
Data based onJPL SSD orbit solution #6 downloaded from JPL on 22 Jan. 2015 UTC
based on 44 observations spanning 2014-2015
Optical observation  
  • reported from 10 observing codes during 20.2141 days: 160, 568, 595, 703, 718, 958, B49, D90, H21, H36
  • designation assigned to Catalina Sky Survey observation at 0430 UT 31 Dec. 2014
  • last observed at 0938 UT on 20 Jan. 2015 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2014 YS15   -     departed
Approximate diameter74 meters (H=23.3)
Closest Earth approach1.57 LD at 2113 UT on 10 Dec. 2014 - Note: JPL reports an approach uncertainty of +/- 9 minutes
Inside Earth SOI10 to 11 Dec. 2014
Inside ten LD of Earth6 to 15 Dec. 2014
Closest Moon approach1.37 LD at 0511 UT on 11 Dec. 2014
Data based onJPL SSD orbit solution #5 downloaded from JPL on 21 Jan. 2015 UTC
based on 19 observations spanning 2014-2015
Optical observation  
  • reported from 6 observing codes during 23.4649 days: 568, 711, F51, H36, J04, J95
  • designation assigned to Pan-STARRS 1 observation at 1505 UT 27 Dec. 2014
  • last observed at 0215 UT on 20 Jan. 2015 by ESA Optical Ground Station
Notesrisk
Links  
2014 YA9   -     departed
Approximate diameter43 meters (H=24.5)
Closest Earth approach4.50 LD at 0016 UT on 16 Dec. 2014
Inside ten LD of Earth11 to 20 Dec. 2014
Data based onJPL SSD orbit solution #8 downloaded from JPL on 26 Jan. 2015 UTC
based on 50 observations spanning 2014-2015
Optical observation  
  • reported from 9 observing codes during 28.9054 days: 204, 291, 493, 958, G96, H21, H36, I93, O75
  • first observed at 1014 UT on 21 Dec. 2014 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 1025 UT 21 Dec. 2014
  • last observed at 0758 UT on 19 Jan. 2015 by ARO Westfield
Links  
2014 YD1   -     departed
Approximate diameter27 meters (H=25.5)
Closest Earth approach9.29 LD at 1850 UT on 11 Dec. 2014
Inside ten LD of Earth9 to 13 Dec. 2014
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 Jan. 2015 UTC
based on 17 observations spanning 2014-2015
Optical observation  
  • reported from 6 observing codes during 31.3213 days: 291, 493, 568, F51, H01, J04
  • designation assigned to ESA Optical Ground Station observation at 0253 UT 20 Dec. 2014
  • last observed at 1036 UT on 20 Jan. 2015 by David Tholen's team on Mauna Kea
Links  
2014 WD366   -     departed
Approximate diameter11 meters (H=27.457)
Closest Earth approach8.27 LD at 0036 UT on 1 Dec. 2014
Inside ten LD of Earth27 Nov. until 4 Dec. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 2 Dec. 2014 UTC
based on 32 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.5490 days: 300, 958, G96, H21
  • designation assigned to Mt. Lemmon Survey observation at 1001 UT 29 Nov. 2014
  • last observed at 2311 UT on 30 Nov. 2014 by Dax Obs.
Links  
2014 WO365   -     departed
Approximate diameter21 meters (H=26.082)
Closest Earth approach3.20 LD at 0138 UT on 1 Dec. 2014
Inside ten LD of Earth27 Nov. until 4 Dec. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 1 Dec. 2014 UTC
based on 21 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.9837 days: G96, H01, I52, J95
  • designation assigned to Mt. Lemmon Survey observation at 0440 UT 28 Nov. 2014
  • last observed at 0416 UT on 30 Nov. 2014 by Magdalena Ridge Obs.
Links  
2014 WY362   -     departed
Approximate diameter25 meters (H=25.647)
Closest Earth approach8.43 LD at 1512 UT on 6 Nov. 2014 - Note: JPL reports an approach uncertainty of +/- 37 minutes
Inside ten LD of Earth4 to 9 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 28 Nov. 2014 UTC
based on 10 observations spanning 5 days
Optical observation  
  • reported from 2 observing codes during 4.9025 days: 291, F51
  • designation assigned to Pan-STARRS 1 observation at 1135 UT 22 Nov. 2014
  • last observed at 0915 UT on 27 Nov. 2014 by Pan-STARRS 1
Links  
2014 WR362   -     departed
Approximate diameter12 meters (H=27.29)
Closest Earth approach1.39 LD at 1711 UT on 22 Nov. 2014
Inside Earth SOI22 to 23 Nov. 2014
Inside ten LD of Earth19 to 26 Nov. 2014
Closest Moon approach1.93 LD at 1137 UT on 22 Nov. 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 27 Nov. 2014 UTC
based on 24 observations spanning 3 days
Optical observation  
  • reported from 5 observing codes during 2.9688 days: 291, 474, 703, G96, H36
  • designation assigned to Catalina Sky Survey observation at 0706 UT 24 Nov. 2014
  • last observed at 0621 UT on 27 Nov. 2014 by the Spacewatch 1.8m telescope
Links  
2008 CQ   -   inbound
Approximate diameter28 meters (H=25.4)
Closest Earth approach4.82 LD at 0119 UT on 31 Jan. 2015 - Note: JPL reports an approach uncertainty of +/- 2.223 days
Inside ten LD of Earth27 Jan. until 3 Feb. 2015
Data based onJPL SSD orbit solution #9 downloaded from JPL on 16 Jan. 2015 UTC (dated 13 June 2014 local)
based on 56 observations spanning 5 days
Optical observation  
    none recent
Notesprevious passage Jan. 2008 at 4.88 LD
Links  
357439 2004 BL86   -   outbound
Approximate diameter537 meters (H=19.)
Closest Earth approach3.12 LD at 1619 UT on 26 Jan. 2015
Inside ten LD of Earth23 to 29 Jan. 2015
Data based onJPL SSD orbit solution #59 downloaded from JPL on 26 Jan. 2015 UTC
based on 243 observations spanning 2004-2015 including radar
Optical observation  
Radar observation  
  • observed 5 times from one location during 0.0625 days
  • first observed at 0640 UT on 26 Jan. 2015 by Goldstone DSS-14 70m antenna
  • last observed at 0810 UT on 26 Jan. 2015 by Goldstone DSS-14 70m antenna
Notesradar 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.