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Legend - object IDs plus links to more info

Data compiled at 1821 UTC on 31 March 2015 for 26 known objects during a period of seven days from 28 March to 3 April 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 BL86216.20 LD  departed
DU2015 DU16.27 LD  departed
EG72015 EG721.17 LD  departed
ET2015 ET48.34 LD  departed intruder
FA2852015 FA2856.37 LDpassing
FC2015 FC3.41 LDoutbound
FF2015 FF16.26 LD  departed
FF362015 FF363.53 LDoutbound
FG352015 FG3540.19 LD+/- 4 minutes  departed
FH372015 FH379.24 LD  departed
FJ1202015 FJ12022.55 LD+/- 7 minutes  departed
FK2015 FK14.13 LD  departed
FK1202015 FK1206.07 LDinbound
FM2015 FM17.59 LD  departed
FM1182015 FM1180.92 LDoutbound intruder
FN332015 FN3310.38 LD+/- 3 minutesapproaching
FN342015 FN3410.74 LD  departed
FO342015 FO348.07 LD  departed
FP2015 FP9.65 LD  departed
FQ352015 FQ3523.24 LD+/- 4 minutes  departed
FT1172015 FT1172.79 LDoutbound
FU2842015 FU28449.68 LD  departed
FV332015 FV3336.87 LD+/- 5 minutes  departed
FW332015 FW3310.94 LD  departed
FW1172015 FW1173.59 LDinbound
FX352015 FX3525.31 LD  departed
DateTfc.Time
28 March '15Rept. Line
29 March '15Rept. Line
30 March '15Rept. Line
31 March '15Rept. Line
1 April '15Rept. Line
2 April '15 Line
3 April '15 Line

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

2015 FA285   -   passing
Approximate diameter17 meters (H=26.472)
Closest Earth approach6.37 LD at 2218 UT on 31 March 2015
Inside ten LD of Earth28 March until 3 April 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 31 March 2015 UTC
based on 24 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.3007 days: 300, 703, H21, H36
  • designation assigned to Catalina Sky Survey observation at 0822 UT 29 March 2015
  • last observed at 1535 UT on 30 March 2015 by Bisei Spaceguard Center
Links  
2015 FU284   -     departed
Approximate diameter8 meters (H=28.268)
Closest Earth approach1.41 LD at 2201 UT on 16 March 2015
Inside Earth SOI16 to 17 March 2015
Inside ten LD of Earth14 to 19 March 2015
Closest Moon approach2.23 LD at 0020 UT on 17 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 30 March 2015 UTC
based on 25 observations
Optical observation  
  • reported from 4 observing codes during 7.320 hours: 300, 900, G96, H01
  • designation assigned to Mt. Lemmon Survey observation at 0655 UT 16 March 2015
  • last observed at 1414 UT on 16 March 2015 by Bisei Spaceguard Center
Links  
2015 FK120   -   inbound
Approximate diameter13 meters (H=27.154)
Closest Earth approach5.80 LD at 1356 UT on 5 April 2015
Inside ten LD of Earth29 March until 13 April 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 31 March 2015 UTC
based on 24 observations spanning 3 days
Optical observation  
  • reported from 5 observing codes during 3.5602 days: 204, 493, G96, H01, H21
  • designation assigned to Mt. Lemmon Survey observation at 0714 UT 27 March 2015
  • last observed at 2041 UT on 30 March 2015 by Calar Alto Obs.
NotesNHATS target
Links  
2015 FJ120   -     departed
Approximate diameter20 meters (H=26.177)
Closest Earth approach8.38 LD at 1713 UT on 17 March 2015 - Note: JPL reports an approach uncertainty of +/- 7 minutes
Inside ten LD of Earth14 to 20 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 29 March 2015 UTC
based on 26 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.9482 days: 291, G96, H01, H21
  • designation assigned to Mt. Lemmon Survey observation at 0622 UT 27 March 2015
  • last observed at 0508 UT on 29 March 2015 by the Mt. Lemmon Survey
NotesNHATS target
Links  
2015 FM118   -   outbound intruder
Approximate diameter6 meters (H=28.693)
Closest Earth approach0.92 LD at 0248 UT on 28 March 2015
Inside Earth-Moon system2209 on 27 March until 0726 UT on 28 March 2015
Inside Earth SOI26 to 29 March 2015
Inside ten LD of Earth23 March until 2 April 2015
Closest Moon approach1.53 LD at 1817 UT on 27 March 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 28 March 2015 UTC
based on 36 observations spanning 3 days
Optical observation  
  • reported from 4 observing codes during 3.1043 days: G96, H01, H21, J95
  • designation assigned to Mt. Lemmon Survey observation at 0608 UT 25 March 2015
  • last observed at 0838 UT on 28 March 2015 by Magdalena Ridge Obs.
Links  
2015 FW117   -   inbound
Approximate diameter95 meters (H=22.763)
Closest Earth approach3.59 LD at 1553 UT on 1 April 2015
Inside ten LD of Earth30 March until 3 April 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 31 March 2015 UTC
based on 104 observations spanning 7 days
Optical observation  
  • reported from 15 observing codes during 6.9537 days: 246, 300, 703, 718, B88, D90, G37, G96, H06, H21, H36, H45, I93, J95, K61
  • designation assigned to Catalina Sky Survey observation at 1018 UT 24 March 2015
  • last observed at 0912 UT on 31 March 2015 by Wiggins Obs.
Notesradar target
Links  
2015 FT117   -   outbound
Approximate diameter7 meters (H=28.478)
Closest Earth approach2.79 LD at 1817 UT on 28 March 2015
Inside ten LD of Earth24 March until 1 April 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 26 March 2015 UTC
based on 24 observations spanning 2 days
Optical observation  
  • reported from 2 observing codes during 2.0242 days: 291, G96
  • designation assigned to Mt. Lemmon Survey observation at 0610 UT 24 March 2015
  • last observed at 0644 UT on 26 March 2015 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2015 FH37   -     departed
Approximate diameter36 meters (H=24.873)
Closest Earth approach8.92 LD at 1024 UT on 27 March 2015
Inside ten LD of Earth26 to 28 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 25 March 2015 UTC
based on 19 observations spanning 3 days
Optical observation  
  • reported from 4 observing codes during 2.6263 days: 300, 568, F51, J95
  • designation assigned to Pan-STARRS 1 observation at 1210 UT 22 March 2015
  • last observed at 0312 UT on 25 March 2015 by Great Shefford Obs.
Notesrisk
Links  
2015 FF36   -   outbound
Approximate diameter17 meters (H=26.479)
Closest Earth approach3.53 LD at 0616 UT on 28 March 2015
Inside ten LD of Earth23 March until 2 April 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 31 March 2015 UTC
based on 51 observations spanning 12 days
Optical observation  
  • reported from 12 observing codes during 12.5694 days: 113, 246, 448, 474, 568, C43, F51, G48, G96, H21, I93, J95
  • first observed at 0822 UT on 14 March 2015 by Pan-STARRS 1
  • designation assigned to Mt. Lemmon Survey observation at 0623 UT 23 March 2015
  • last observed at 2202 UT on 26 March 2015 by Great Shefford Obs.
Notesrisk
Links  
2015 FX35   -     departed
Approximate diameter10 meters (H=27.647)
Closest Earth approach9.49 LD at 1957 UT on 13 March 2015
Inside ten LD of Earth11 to 15 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 March 2015 UTC
based on 18 observations spanning 7 days
Optical observation  
  • reported from 3 observing codes during 7.1443 days: 291, G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0613 UT 17 March 2015
  • last observed at 0941 UT on 24 March 2015 by the Mt. Lemmon Survey
Links  
2015 FQ35   -     departed
Approximate diameter26 meters (H=25.601)
Closest Earth approach2.26 LD at 0229 UT on 17 March 2015 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside Earth SOI16 to 17 March 2015
Inside ten LD of Earth12 to 21 March 2015
Closest Moon approach2.85 LD at 0329 UT on 17 March 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 24 March 2015 UTC
based on 36 observations spanning one day
Optical observation  
  • reported from 9 observing codes during 1.5142 days: 246, 300, 448, 703, G96, H01, H21, J95, O75
  • designation assigned to Catalina Sky Survey observation at 0930 UT 22 March 2015
  • last observed at 2151 UT on 23 March 2015 by KLENOT
Links  
2015 FG35   -     departed
Approximate diameter29 meters (H=25.355)
Closest Earth approach8.57 LD at 1141 UT on 7 March 2015 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside ten LD of Earth4 to 10 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 March 2015 UTC
based on 8 observations spanning 4 days
Optical observation  
  • reported from 3 observing codes during 3.9918 days: 291, 568, F51
  • designation assigned to Pan-STARRS 1 observation at 1220 UT 19 March 2015
  • last observed at 1208 UT on 23 March 2015 by the Spacewatch 1.8m telescope
Links  
2015 FO34   -     departed
Approximate diameter10 meters (H=27.618)
Closest Earth approach6.42 LD at 1748 UT on 23 March 2015
Inside ten LD of Earth17 to 30 March 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 24 March 2015 UTC
based on 27 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.3162 days: 300, 474, 703, G96
  • designation assigned to Catalina Sky Survey observation at 0646 UT 21 March 2015
  • last observed at 1421 UT on 23 March 2015 by Mt. John Obs.
NotesNHATS target
Links  
2015 FN34   -     departed
Approximate diameter15 meters (H=26.747)
Closest Earth approach8.00 LD at 0517 UT on 25 March 2015
Inside ten LD of Earth22 to 27 March 2015
Data based onJPL SSD orbit solution #1 downloaded from JPL on 22 March 2015 UTC
based on 27 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 23.522 hours: 300, 703, G96, H36
  • designation assigned to Catalina Sky Survey observation at 0720 UT 21 March 2015
  • last observed at 0651 UT on 22 March 2015 by the Mt. Lemmon Survey
Links  
2015 FW33   -     departed
Approximate diameter22 meters (H=25.925)
Closest Earth approach9.57 LD at 0322 UT on 23 March 2015
Inside ten LD of Earth20 to 25 March 2015
Data based onJPL SSD orbit solution #7 downloaded from JPL on 31 March 2015 UTC
based on 35 observations spanning 11 days
Optical observation  
  • reported from 8 observing codes during 10.8956 days: 246, 291, 568, 703, 926, F51, H21, J69
  • designation assigned to Pan-STARRS 1 observation at 0943 UT 19 March 2015
  • last observed at 0713 UT on 30 March 2015 by ARO Westfield
NotesNHATS target
Links  
2015 FV33   -     departed
Approximate diameter18 meters (H=26.372)
Closest Earth approach8.23 LD at 0746 UT on 3 March 2015 - Note: JPL reports an approach uncertainty of +/- 5 minutes
Inside ten LD of Earth27 Feb. until 7 March 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 28 March 2015 UTC
based on 12 observations spanning 9 days
Optical observation  
  • reported from 4 observing codes during 8.7914 days: 291, 568, F51, H21
  • designation assigned to Pan-STARRS 1 observation at 1232 UT 18 March 2015
  • last observed at 0732 UT on 27 March 2015 by ARO Westfield
Links  
2015 FN33   -   approaching
Approximate diameter19 meters (H=26.206)
Closest Earth approach9.81 LD at 2102 UT on 6 April 2015 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth5 to 8 April 2015
Data based onJPL SSD orbit solution #2 downloaded from JPL on 24 March 2015 UTC
based on 17 observations spanning 7 days
Optical observation  
  • reported from 3 observing codes during 6.9851 days: G96, H21, I52
  • designation assigned to Mt. Lemmon Survey observation at 0749 UT 16 March 2015
  • last observed at 0727 UT on 23 March 2015 by ARO Westfield
NotesNHATS target
Links  
2015 FP   -     departed
Approximate diameter32 meters (H=25.149)
Closest Earth approach9.65 LD at 0422 UT on 28 March 2015
Inside ten LD of Earth26 to 29 March 2015
Data based onJPL SSD orbit solution #4 downloaded from JPL on 25 March 2015 UTC
based on 49 observations spanning 7 days
Optical observation  
  • reported from 9 observing codes during 7.4492 days: 246, 300, 568, 703, 926, C47, F51, H36, O75
  • designation assigned to Pan-STARRS 1 observation at 1130 UT 17 March 2015
  • last observed at 2217 UT on 24 March 2015 by Nonndorf Obs.
Links  
2015 FM   -     departed
Approximate diameter20 meters (H=26.162)
Closest Earth approach6.08 LD at 0249 UT on 23 March 2015
Inside ten LD of Earth20 to 25 March 2015
Data based onJPL SSD orbit solution #6 downloaded from JPL on 23 March 2015 UTC
based on 53 observations spanning 6 days
Optical observation  
  • reported from 9 observing codes during 5.7852 days: 246, 474, 926, C47, G96, H21, I52, I93, J95
  • designation assigned to Mt. Lemmon Survey observation at 0718 UT 17 March 2015
  • last observed at 0208 UT on 23 March 2015 by Great Shefford Obs.
Links  
2015 FK   -     departed
Approximate diameter29 meters (H=25.336)
Closest Earth approach3.65 LD at 0652 UT on 19 March 2015
Inside ten LD of Earth13 to 25 March 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 21 March 2015 UTC
based on 101 observations spanning 3 days
Optical observation  
  • reported from 11 observing codes during 3.4611 days: 246, 474, 703, 958, C47, G56, H01, H21, I52, I93, J95
  • designation assigned to Catalina Sky Survey observation at 0336 UT 17 March 2015
  • last observed at 1440 UT on 20 March 2015 by Mt. John Obs.
Links  
2015 FF   -     departed
Approximate diameter15 meters (H=26.723)
Closest Earth approach4.15 LD at 2027 UT on 20 March 2015
Inside ten LD of Earth16 to 24 March 2015
Data based onJPL SSD orbit solution #3 downloaded from JPL on 21 March 2015 UTC
based on 21 observations spanning 4 days
Optical observation  
  • reported from 4 observing codes during 4.2620 days: 246, 474, F51, I52
  • designation assigned to Pan-STARRS 1 observation at 1002 UT 16 March 2015
  • last observed at 1619 UT on 20 March 2015 by Mt. John Obs.
NotesNHATS target
Links  
2015 FC   -   outbound
Approximate diameter16 meters (H=26.665)
Closest Earth approach2.89 LD at 2146 UT on 26 March 2015
Inside ten LD of Earth21 March until 1 April 2015
Data based onJPL SSD orbit solution #7 downloaded from JPL on 25 March 2015 UTC
based on 35 observations spanning 7 days
Optical observation  
  • reported from 8 observing codes during 7.3755 days: 246, 568, 703, 926, F51, G96, H21, H36
  • designation assigned to Pan-STARRS 1 observation at 1128 UT 16 March 2015
  • last observed at 2029 UT on 23 March 2015 by KLENOT
NotesNHATS target
Links  
2015 EG7   -     departed
Approximate diameter11 meters (H=27.353)
Closest Earth approach2.72 LD at 2126 UT on 20 March 2015
Inside ten LD of Earth17 to 24 March 2015
Data based onJPL SSD orbit solution #5 downloaded from JPL on 21 March 2015 UTC
based on 72 observations spanning 5 days
Optical observation  
  • reported from 7 observing codes during 5.3466 days: 474, 568, G96, H01, J04, K91, K93
  • designation assigned to Mt. Lemmon Survey observation at 0702 UT 15 March 2015
  • last observed at 1521 UT on 20 March 2015 by Mt. John Obs.
Notesrisk
Links  
2015 ET   -     departed intruder
Approximate diameter16 meters (H=26.684)
Closest Earth approach0.33 LD at 1641 UT on 10 March 2015
Inside Earth-Moon system0825 on 10 March until 0057 UT on 11 March 2015
Inside Earth SOI9 to 11 March 2015
Inside ten LD of Earth7 to 14 March 2015
Closest Moon approach0.57 LD at 2352 UT on 10 March 2015
Inside one LD of Moon1702 on 10 March until 0643 UT on 11 March 2015
Data based onJPL SSD orbit solution #9 downloaded from JPL on 26 March 2015 UTC
based on 93 observations spanning 13 days
Optical observation  
  • reported from 17 observing codes during 13.0039 days: 204, 291, 300, 474, 568, 595, 703, 807, 900, C77, G40, H21, H36, J04, O75, Q62, W88
  • designation assigned to Catalina Sky Survey observation at 1141 UT 11 March 2015
  • last observed at 1147 UT on 24 March 2015 by David Tholen's team on Mauna Kea
Notesrisk
Links  
2015 DU   -     departed
Approximate diameter15 meters (H=26.708)
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 #15 downloaded from JPL on 29 March 2015 UTC
based on 88 observations spanning 79 days including radar
Optical observation  
  • reported from 11 observing codes during 78.9670 days: 246, 461, 568, 703, 807, 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 1018 UT on 28 March 2015 by Pan-STARRS 1
Radar observation  
Notesradar target, NHATS target
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 #85 downloaded from JPL on 27 March 2015 UTC
based on 986 observations spanning 2004-2015 including radar
Optical observation  
  • reported from 52 observing codes during 95.9187 days: 006, 073, 104, 160, 213, 300, 458, 474, 585, 595, 619, 703, 718, 926, 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 0929 UT on 26 March 2015 by the Catalina Sky Survey
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.