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Legend - object IDs plus links to more info

Data compiled at 2305 UTC on 1 March 2015 for 21 known objects during a period of seven days from 26 Feb. to 4 March 2015. 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
BL86357439 2004 BL86107.04 LD  departed
CA402015 CA407.35 LD  departed
CQ132015 CQ1313.30 LD  departed
CT132015 CT1321.17 LD  departed
DB2015 DB14.23 LD  departed
DC542015 DC5418.42 LD  departed
DD12015 DD113.56 LD  departed intruder
DD542015 DD549.89 LD  departed
DD1992015 DD19915.86 LD+/- 6 minutes  departed
DF2002015 DF20010.79 LD+/- 2 minutes  departed
DK2002015 DK2009.12 LD+/- 5 minutesapproaching
DM1552015 DM15526.41 LD+/- one minute  departed
DO2152015 DO2153.07 LDinbound
DS532015 DS533.12 LDinbound
DU2015 DU8.05 LDoutbound
DY1982015 DY1982.17 LDpassing
DZ1982015 DZ19812.96 LD+/- 3 minutes  departed
WD3662014 WD366159.41 LD  departed
WO3652014 WO365168.25 LD  departed
WR3622014 WR362391.55 LD  departed
WY3622014 WY362399.0 LD+/- 37 minutes  departed
DateTfc.Time
26 Feb. '15Rept. Line
27 Feb. '15Rept. Line
28 Feb. '15Rept. Line
1 March '15Rept. Line
2 March '15Rept. Line
3 March '15 Line
4 March '15 Line

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

2015 DO215   -   inbound
Approximate diameter16 meters (H=26.651)
Closest Earth approach3.07 LD at 1734 UT on 2 March 2015
Inside ten LD of Earth22 Feb. until 10 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 1 March 2015 UTC
based on 19 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.6580 days: 703, C47, H36, J95
  • designation assigned to Catalina Sky Survey observation at 0421 UT 27 Feb. 2015
  • last observed at 2008 UT on 1 March 2015 by Great Shefford Obs.
Links  
2015 DK200   -   approaching
Approximate diameter26 meters (H=25.56)
Closest Earth approach6.93 LD at 0021 UT on 8 March 2015 - Note: JPL reports an approach uncertainty of +/- 5 minutes
Inside ten LD of Earth4 to 11 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 27 Feb. 2015 UTC
based on 9 observations spanning 6 days
Optical observation  
  • reported from 2 observing codes during 5.9364 days: 568, F51
  • designation assigned to Pan-STARRS 1 observation at 1335 UT 20 Feb. 2015
  • last observed at 1204 UT on 26 Feb. 2015 by David Tholen's team on Mauna Kea
NotesNHATS target
Links  
2015 DF200   -     departed
Approximate diameter20 meters (H=26.099)
Closest Earth approach3.70 LD at 0620 UT on 23 Feb. 2015 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth20 to 25 Feb. 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 27 Feb. 2015 UTC
based on 20 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.0639 days: 246, 703, G96, J95
  • designation assigned to Catalina Sky Survey observation at 0442 UT 26 Feb. 2015
  • last observed at 0614 UT on 27 Feb. 2015 by the Mt. Lemmon Survey
Links  
2015 DD199   -     departed
Approximate diameter20 meters (H=26.181)
Closest Earth approach8.63 LD at 1101 UT on 18 Feb. 2015 - Note: JPL reports an approach uncertainty of +/- 6 minutes
Inside ten LD of Earth15 to 21 Feb. 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 27 Feb. 2015 UTC
based on 9 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 1.6152 days: 291, F51, J95
  • designation assigned to Pan-STARRS 1 observation at 1108 UT 25 Feb. 2015
  • last observed at 0154 UT on 27 Feb. 2015 by Great Shefford Obs.
Links  
2015 DZ198   -     departed
Approximate diameter39 meters (H=24.669)
Closest Earth approach4.98 LD at 0940 UT on 20 Feb. 2015 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth16 to 24 Feb. 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 1 March 2015 UTC
based on 19 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.4100 days: 246, 587, F51, K61
  • designation assigned to Pan-STARRS 1 observation at 1129 UT 25 Feb. 2015
  • last observed at 2119 UT on 26 Feb. 2015 by KLENOT
Links  
2015 DY198   -   passing
Approximate diameter16 meters (H=26.599)
Closest Earth approach2.17 LD at 1123 UT on 1 March 2015
Inside Earth SOIduring 1 March 2015
Inside ten LD of Earth26 Feb. until 4 March 2015
Closest Moon approach2.31 LD at 0710 UT on 1 March 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Feb. 2015 UTC
based on 21 observations spanning 2 days
Optical observation  
  • reported from 5 observing codes during 1.6954 days: 246, 300, 703, G96, J95
  • designation assigned to Catalina Sky Survey observation at 1010 UT 25 Feb. 2015
  • last observed at 0252 UT on 27 Feb. 2015 by Great Shefford Obs.
Links  
2015 DM155   -     departed
Approximate diameter24 meters (H=25.76)
Closest Earth approach8.89 LD at 2151 UT on 14 Feb. 2015
Inside ten LD of Earth12 to 16 Feb. 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Feb. 2015 UTC
based on 37 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 1.6739 days: 033, 113, 246, G96, H21, J95
  • designation assigned to Mt. Lemmon Survey observation at 0513 UT 20 Feb. 2015
  • last observed at 2124 UT on 21 Feb. 2015 by Great Shefford Obs.
Links  
2015 DD54   -     departed
Approximate diameter28 meters (H=25.413)
Closest Earth approach7.17 LD at 1803 UT on 21 Feb. 2015
Inside ten LD of Earth17 to 26 Feb. 2015
Data based onJPL SSD orbit solution #6 downloaded from JPL on 1 March 2015 UTC
based on 85 observations spanning 38 days
Optical observation  
  • reported from 16 observing codes during 38.2986 days: 113, 204, 246, 291, 474, 568, 595, 703, 900, C77, F51, H21, H36, I93, J16, K51
  • first observed at 0747 UT on 20 Jan. 2015 by Pan-STARRS 1
  • designation assigned to Catalina Sky Survey observation at 0825 UT 19 Feb. 2015
  • last observed at 1457 UT on 27 Feb. 2015 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2015 DC54   -     departed
Approximate diameter20 meters (H=26.184)
Closest Earth approach6.19 LD at 2014 UT on 15 Feb. 2015
Inside ten LD of Earth11 to 20 Feb. 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 26 Feb. 2015 UTC
based on 39 observations spanning 6 days
Optical observation  
  • reported from 10 observing codes during 6.2240 days: 113, 204, 246, 291, 595, 703, G96, H21, I93, K51
  • designation assigned to Catalina Sky Survey observation at 0734 UT 19 Feb. 2015
  • last observed at 1256 UT on 25 Feb. 2015 by the Spacewatch 1.8m telescope
Links  
2015 DS53   -   inbound
Approximate diameter49 meters (H=24.18)
Closest Earth approach3.12 LD at 2025 UT on 2 March 2015
Inside ten LD of Earth27 Feb. until 5 March 2015
Data based onJPL SSD orbit solution #7 downloaded from JPL on 28 Feb. 2015 UTC
based on 57 observations spanning 9 days
Optical observation  
  • reported from 9 observing codes during 8.9227 days: 104, 246, 291, 474, 703, 807, H21, K92, W88
  • designation assigned to Catalina Sky Survey observation at 0757 UT 18 Feb. 2015
  • last observed at 0605 UT on 27 Feb. 2015 by Don Cranford, Jr. via Slooh.com Chile Obs.
Links  
2015 DD1   -     departed intruder
Approximate diameter3 meters (H=30.232)
Closest Earth approach0.10 LD at 0738 UT on 17 Feb. 2015
Inside Earth-Moon system1647 on 16 Feb. until 2229 UT on 17 Feb. 2015
Inside Earth SOI15 to 18 Feb. 2015
Inside ten LD of Earth10 to 23 Feb. 2015
Closest Moon approach0.69 LD at 2148 UT on 16 Feb. 2015
Inside one LD of Moon1142 on 16 Feb. until 0737 UT on 17 Feb. 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 20 Feb. 2015 UTC
based on 64 observations spanning one day
Optical observation  
  • reported from 8 observing codes during 23.731 hours: 204, 291, 474, 703, G96, K92, Q62, W87
  • designation assigned to Catalina Sky Survey observation at 0955 UT 18 Feb. 2015
  • last observed at 0939 UT on 19 Feb. 2015 by the Mt. Lemmon Survey
NotesNHATS target
Links  
2015 DU   -   outbound
Approximate diameter15 meters (H=26.718)
Closest Earth approach7.98 LD at 0959 UT on 23 Feb. 2015
Inside ten LD of Earth8 Feb. until 9 March 2015
Data based onJPL SSD orbit solution #10 downloaded from JPL on 28 Feb. 2015 UTC
based on 81 observations spanning 50 days
Optical observation  
  • reported from 10 observing codes during 49.9656 days: 246, 461, 568, 703, B18, F51, H21, H36, J95, V37
  • first observed at 1105 UT on 8 Jan. 2015 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1552 UT 17 Feb. 2015
  • last observed at 1016 UT on 27 Feb. 2015 by the Catalina Sky Survey
NotesNHATS target
Links  
2015 DB   -     departed
Approximate diameter9 meters (H=27.835)
Closest Earth approach1.27 LD at 1926 UT on 18 Feb. 2015
Inside Earth SOI17 to 19 Feb. 2015
Inside ten LD of Earth13 to 23 Feb. 2015
Closest Moon approach1.94 LD at 0157 UT on 19 Feb. 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Feb. 2015 UTC
based on 69 observations spanning 2 days
Optical observation  
  • reported from 11 observing codes during 1.9497 days: 160, 291, 461, 474, 703, C77, H01, H21, J95, L04, Z99
  • designation assigned to Catalina Sky Survey observation at 0447 UT 17 Feb. 2015
  • last observed at 0334 UT on 19 Feb. 2015 by Great Shefford Obs.
Links  
2015 CA40   -     departed
Approximate diameter40 meters (H=24.635)
Closest Earth approach6.29 LD at 2148 UT on 23 Feb. 2015
Inside ten LD of Earth19 to 28 Feb. 2015
Data based onJPL SSD orbit solution #10 downloaded from JPL on 26 Feb. 2015 UTC
based on 152 observations spanning 9 days
Optical observation  
  • reported from 13 observing codes during 8.6483 days: 246, 461, 474, 703, A48, B18, C47, F65, G68, J69, J95, Q65, W87
  • designation assigned to SZTE Asteroid Program observation at 2224 UT 15 Feb. 2015
  • last observed at 1358 UT on 24 Feb. 2015 by Mt. John Obs.
NotesNHATS target
Links  
2015 CT13   -     departed
Approximate diameter23 meters (H=25.846)
Closest Earth approach1.84 LD at 0925 UT on 11 Feb. 2015
Inside Earth SOI10 to 12 Feb. 2015
Inside ten LD of Earth4 to 18 Feb. 2015
Closest Moon approach1.05 LD at 1821 UT on 11 Feb. 2015
Data based onJPL SSD orbit solution #4 downloaded from JPL on 25 Feb. 2015 UTC
based on 31 observations spanning 11 days
Optical observation  
  • reported from 6 observing codes during 11.1099 days: 291, 461, 568, 703, H01, I52
  • designation assigned to Catalina Sky Survey observation at 1220 UT 13 Feb. 2015
  • last observed at 1458 UT on 24 Feb. 2015 by David Tholen's team on Mauna Kea
Notesrisk, NHATS target
Links  
2015 CQ13   -     departed
Approximate diameter25 meters (H=25.689)
Closest Earth approach6.67 LD at 0831 UT on 18 Feb. 2015
Inside ten LD of Earth13 to 23 Feb. 2015
Data based onJPL SSD orbit solution #4 downloaded from JPL on 25 Feb. 2015 UTC
based on 39 observations spanning 11 days
Optical observation  
  • reported from 8 observing codes during 11.3865 days: 246, 461, 474, 703, G96, H21, J69, O75
  • designation assigned to Catalina Sky Survey observation at 0714 UT 13 Feb. 2015
  • last observed at 1631 UT on 24 Feb. 2015 by Mt. John Obs.
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  
357439 2004 BL86   -     departed
Approximate diameter467 meters (H=19.3)
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 #81 downloaded from JPL on 22 Feb. 2015 UTC
based on 977 observations spanning 2004-2015 including radar
Optical observation  
  • reported from 50 observing codes during 63.3264 days: 006, 073, 104, 160, 213, 300, 458, 474, 585, 595, 619, 718, 958, 987, A81, B18, C23, C39, C47, C77, C90, D90, G40, G48, H06, H21, H45, H78, I13, I33, I39, I57, I99, J69, J95, K38, K90, K91, K93, L04, Q62, Q68, V78, W86, W87, W88, Y00, Z73, Z92, Z99
  • first observed at 1126 UT on 20 Dec. 2014 by Steven M. Tilley via iTelescope Obs. Siding Spring
  • last observed at 1916 UT on 21 Feb. 2015 by Terskol Obs.
Radar observation  
  • observed 13 times from 2 locations during 4.9097 days
  • first observed at 0640 UT on 26 Jan. 2015 by Goldstone DSS-14 70m antenna
  • last observed at 0430 UT on 31 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.