<10=less than 10 LD from Earth

EBN Timeline for February 2012

<SI=inside Earth SOI (sphere of influence)
M<1=less than 1 LD from the Moon
E<1=less than 1 LD from Earth (intruder)
LD = lunar distance (average Earth-Moon distance)
29 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
16252012 EZ1 enters Earth SOI830023362012 DS32 closest lunar approach = 2.84 LD
07082012 DS32 enters Earth SOI820020352012 DR32 last observed optically, by Eschenberg Obs. at 10.99 LD inbound, V=18.3 reported
1848discovery MPEC issued for 2012 DJ54
1846discovery MPEC issued for 2012 DH54
11512012 DW60 designation credited to Spacewatch 1.8m at 15.51 LD inbound, R=20.2 reported, elon. 149.3°
06542012 DU60 designation credited to LINEAR at 10.87 LD inbound, mag 19.3 reported, elon. 161.1°
28 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
06422012 EP10 enters Earth SOI81002030discovery MPEC issued for 2012 DW43
00392012 FN enters 10-LD bubble800014532012 DW43 last observed optically, by Tholen team/Mauna Kea at 24.35 LD outbound, R=20.9 reported
06212012 DS32 last observed optically, by ARO Westfield at 4.12 LD inbound, V=17.7 reported
01442012 DM32 last observed optically, by ARO Westfield at 11.49 LD outbound, V=19.9 reported
27 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
09592012 DN31 enters 10-LD bubble700016462012 DX13 last observed by radar, from Arecibo at 12.32 LD outbound, V=nil
05302012 DX13 exits 10-LD bubble600012102012 DY13 last observed optically, by Tholen team/Mauna Kea at 25.18 LD outbound, R=21.9 reported
04412012 EZ1 enters 10-LD bubble700011132012 DJ54 designation credited to PS1 at 5.96 LD outbound, V=21.9 reported, elon. 153.7°
01352012 DM32 exits 10-LD bubble600011112012 DH54 designation credited to PS1 at 13.31 LD inbound, w=21.9 reported, elon. 153.8°
0119discovery MPEC issued for 2012 DS32
0116discovery MPEC issued for 2012 DR32
0116discovery MPEC issued for 2012 DR32
0105discovery MPEC issued for 2012 DM32
0105discovery MPEC issued for 2012 DM32
26 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
04412012 DY exits 10-LD bubble70002112discovery MPEC issued for 2012 DN31
16492012 DX13 first observed by radar, from Arecibo at 7.59 LD outbound, V=nil
10232012 DW43 designation credited to PS1 at 19.87 LD outbound, w=21.8 reported, elon. 162.7°
25 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
21212012 DX exits 10-LD bubble800023052012 CS46 closest Earth approach = 2.75 LD - Note: JPL reports an approach to 2.75 LD (2.37 minimum) at 2312 UTC with an uncertainty of +/- 14 hours and 36 minutes.
13522012 DZ exits 10-LD bubble900019392012 DX13 last observed optically, by Great Shefford Obs. at 4.96 LD outbound, R=18.0 reported, elon. 81.6°
07462012 DS32 enters 10-LD bubble1000015182012 DX13 closest Earth approach = 4.86 LD
09592012 DS32 designation credited to CSS at 9.81 LD inbound, V=19.3 reported, elon. 156.6°
09552012 DR32 designation credited to CSS at 24.63 LD inbound, V=19.7 reported, elon. 154.4°
05522012 DM32 designation credited to MLS at 7.79 LD outbound, V=19.4 reported, elon. 144.1°
03542012 DN31 designation credited to LINEAR at 12.69 LD inbound, mag 18.1 reported, elon. 123.1°
24 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
06122012 DJ54 exits Earth SOI90002005discovery MPEC issued for 2012 DJ14
0429425755 2011 CP4 exits 10-LD bubble910008162012 DY closest Earth approach = 9.21 LD
01072012 DX13 enters 10-LD bubble101000159discovery MPEC issued for 367943 Duende (2012 DA14)
0159discovery MPEC issued for 367943 Duende (2012 DA14)
23 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
22582012 EA enters 10-LD bubble91002057discovery MPEC issued for 2012 DY13
21192012 DF4 exits 10-LD bubble81002054discovery MPEC issued for 2012 DX13
13242012 DY13 exits 10-LD bubble91001401425755 2011 CP4 closest Earth approach = 9.11 LD
11252012 DJ14 last observed optically, by CSS at 13.08 LD outbound, V=19.2 reported
03172012 DM32 closest Earth approach = 6.70 LD
0040367943 Duende (2012 DA14) designation credited to La Sagra Obs. at 11.24 LD outbound, V=18.9 reported, elon. 114.4°
0022distant 2009 DT10 last observed optically, by Schiaparelli Obs. at 41.80 LD, R=18.7 reported
22 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
2333425755 2011 CP4 enters 10-LD bubble1010023022012 DZ closest Earth approach = 2.52 LD
12042012 DY enters 10-LD bubble91001837425755 2011 CP4 last observed optically, by SSS at 10.66 LD inbound, V=16.3 reported
08272012 DX exits Earth SOI810016352012 DJ54 closest Earth approach = 1.48 LD
04572012 DJ14 exits 10-LD bubble820008532012 DJ14 designation credited to CSS at 10.36 LD outbound, V=19.1 reported, elon. 165.4°
0810distant 2009 DT10 observed first, by CSS at 39.74 LD, V=19.2 reported, elon. 150.1°
07252012 DY last observed optically, by ARO Westfield at 10.17 LD inbound, V=19.2 reported
06052012 DY13 designation credited to CSS at 5.01 LD outbound, V=19.1 reported, elon. 171.6°
01272012 DX closest lunar approach = 2.08 LD
21 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
1921367943 Duende (2012 DA14) exits 10-LD bubble920019072012 DJ54 closest lunar approach = 1.25 LD
13402012 DY13 exits Earth SOI1020018192012 DX closest Earth approach = 1.96 LD
04422012 DY13 exits Earth-Moon system1030012322012 DX last observed optically, by MLS at 2.04 LD inbound, V=18.2 reported
04112012 DX enters Earth SOI1030110512012 DZ last observed optically, by Mt. John Obs. at 6.12 LD inbound, R=17.6 reported
02572012 DJ54 enters Earth SOI1020109152012 BA102 last observed optically, by MRO at 45.60 LD outbound, R=22.5 reported
07032012 DF4 closest Earth approach = 3.35 LD
06462012 DJ14 observed first, by PTF at 8.25 LD outbound, r=18.7 reported, elon. 164.3°
06142012 DF4 last observed optically, by Great Shefford Obs. at 3.36 LD inbound, R=17.8 reported
06042012 CU last observed optically, by MRO at 51.07 LD outbound, R=21.8 reported
20 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
22102012 DY13 more than one LD from Moon1010122432012 DY13 closest Earth approach = 0.28 LD
16432012 DY13 enters Earth-Moon system101112232discovery MPEC issued for 2012 DF4
14542012 DW43 exits 10-LD bubble1011016492012 DY13 closest lunar approach = 0.49 LD
11272012 DY13 within one LD of Moon1111007422011 YW15 last observed optically, by ARO Westfield at 75.24 LD outbound, V=22.6 reported
08172012 DZ enters 10-LD bubble11100
07452012 DY13 enters Earth SOI10100
01192012 CS46 enters 10-LD bubble10000
19 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
04222012 DM32 enters 10-LD bubble900023222012 DJ14 closest Earth approach = 7.18 LD
1540discovery MPEC issued for 2012 DZ
1538discovery MPEC issued for 2012 DY
1536discovery MPEC issued for 2012 DX
09562012 DZ designation credited to CSS at 13.37 LD inbound, V=18.6 reported, elon. 178.2°
07182012 DY designation credited to CSS at 14.12 LD inbound, V=19.57 calculated, elon. 179.4°
06272012 DX designation credited to CSS at 6.25 LD inbound, V=19.4 reported, elon. 152.4°
18 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
16512012 DF4 enters 10-LD bubble80002140discovery MPEC issued for 2012 CS46
08002012 DY13 enters 10-LD bubble70002135discovery MPEC issued for 2012 CQ46
04312012 DW43 closest Earth approach = 8.51 LD
17 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1
17372012 DJ14 enters 10-LD bubble6000
15242012 DX enters 10-LD bubble5000
16 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
13242012 EP10 enters 10-LD bubble400012222012 DX13 designation credited to PS1 at 50.75 LD inbound, w=20.7 reported, elon. 169.3°
12212012 DF4 designation credited to PS1 at 17.72 LD inbound, w=20.4 reported, elon. 172.5°
0609367943 Duende (2012 DA14) closest Earth approach = 6.78 LD
15 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
17542012 DW43 enters 10-LD bubble300008562012 CQ46 last observed optically, by Tholen team/Mauna Kea at 27.93 LD outbound, R=21.7 reported
08452012 CS46 last observed optically, by Tholen team/Mauna Kea at 17.59 LD inbound, R=21.2 reported
14 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
12092012 DJ54 enters 10-LD bubble200008402012 CS46 designation credited to PS1 at 19.26 LD inbound, w=21.8 reported, elon. 168.6°
13 Feb. 2012
UTEvents
07282012 CQ46 designation credited to PS1 at 21.88 LD outbound, w=22.2 reported, elon. 166.5°
03442011 YT62 last observed optically, by ARO Westfield at 141.04 LD outbound, V=22.2 reported
11 Feb. 2012
UTEvents
1325discovery MPEC issued for 2012 CL17
09162012 CL17 last observed optically, by Lister/Faulkes North at 26.78 LD outbound, R=20.6 reported
10 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
1642367943 Duende (2012 DA14) enters 10-LD bubble100007352012 CL17 designation credited to MLS at 21.60 LD outbound, V=19.9 reported, elon. 162.1°
9 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1
03102012 CQ46 exits 10-LD bubble0000
7 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1
19552012 CL17 exits 10-LD bubble1000
6 Feb. 2012
UTEvents
00142012 CL17 closest Earth approach = 4.53 LD - Note: JPL reports an approach to 4.52 LD (4.42 minimum) at 0017 UTC with an uncertainty of +/- 14 minutes.
5 Feb. 2012
UTEvents
22212012 CQ46 closest Earth approach = 3.61 LD - Note: JPL reports an approach to 3.61 LD (3.46 minimum) with an uncertainty of +/- one hour and 38 minutes.
4 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1
23402012 BD14 exits 10-LD bubble2000
21572012 CU exits 10-LD bubble3000
04342012 CL17 enters 10-LD bubble4000
3 Feb. 2012
UTEvents
2002discovery MPEC issued for 2012 CU
10382012 BO11 last observed optically, by Spacewatch 1.8m at 37.57 LD outbound, V=21.42 calculated
2 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1Events
17362012 CQ46 enters 10-LD bubble300009412012 CU designation credited to LINEAR at 4.33 LD outbound, mag 17.5 reported, elon. 126.7°
1 Feb. 2012
UTBoundary Transitions<10<SIM<1E<1
10212012 BA102 exits 10-LD bubble2000
08582012 BX34 exits 10-LD bubble3000


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