<10=less than 10 LD from Earth

EBN Timeline for April 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)
30 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
15322012 HP13 exits 10-LD bubble400023332012 HA34 last observed optically, by St. Pardon de Conques Obs. at 4.88 LD inbound, V=17.0 reported
12572012 HG2 exits 10-LD bubble50000938distant 2011 LT17 last observed optically, by Spacewatch 1.8m at 282.21 LD, R=22.1 reported
03551992 JD enters 10-LD bubble600009062012 HA34 designation credited to CSS at 6.25 LD inbound, V=18.0 reported, elon. 147.0°
08182012 HE31 closest Earth approach = 2.71 LD
29 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
18132012 HM exits Earth SOI50001444discovery MPEC issued for 2012 HE31
11302012 HE31 last observed optically, by SSS at 3.39 LD inbound, V=18.0 reported
0829distant 2011 LT17 observed first, by Spacewatch 1.8m at 280.80 LD, R=21.9 reported, elon. 104.9°
28 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
20492012 HA34 enters 10-LD bubble51001325discovery MPEC issued for 2012 HD25
14312012 HN1 exits 10-LD bubble41001321discovery MPEC issued for 2012 HC25
10562012 HC25 last observed optically, by Spacewatch 1.8m at 29.52 LD outbound, V=21.66 calculated
10052012 HM closest Earth approach = 1.45 LD
07462012 HM closest lunar approach = 1.08 LD
27 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
17442012 HP13 exits Earth SOI510020042012 HP13 last observed optically, by Alter Satzberg Obs. at 2.58 LD outbound, V=16.9 reported, elon. 73.6°
01572012 HM enters Earth SOI520019572012 HM last observed optically, by Vitebsk Obs. at 1.68 LD inbound, R=15.5 reported, elon. 81.4°
10242012 HP13 closest lunar approach = 1.10 LD
09412012 HD25 designation credited to PS1 at 31.79 LD outbound, i=18.6 reported, elon. 171.9°
06252012 HP13 closest Earth approach = 1.98 LD
04452012 HE31 designation credited to LINEAR at 7.87 LD inbound, mag 19.2 reported, elon. 151.8°
26 April 2012
UTBoundary Transitions<10<SIM<1E<1
19062012 HP13 enters Earth SOI5100
05552012 HE31 enters 10-LD bubble5000
02132012 HE exits 10-LD bubble4000
00402012 HE2 exits 10-LD bubble5000
25 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
12142012 GP1 exits 10-LD bubble600008082012 HC25 designation credited to MLS at 25.89 LD outbound, V=21.3 reported, elon. 149.8°
24 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
21052012 HQ exits 10-LD bubble700008562012 HQ closest Earth approach = 9.76 LD - Note: JPL reports an approach to 9.74 LD (9.69 minimum) .
06322012 HE2 closest Earth approach = 8.91 LD
23 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
21202012 HP13 enters 10-LD bubble80002212discovery MPEC issued for 2012 HP13
20472012 HQ enters 10-LD bubble70002203discovery MPEC issued for 2012 HM13
12562007 HV4 exits 10-LD bubble600015112012 HN1 last observed optically, by Tholen team/Mauna Kea at 5.82 LD outbound, R=21.2 reported, elon. 75.5°
08582012 HM13 last observed optically, by Spacewatch 1.8m at 11.36 LD outbound, V=21.47 calculated
22 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
21452012 HM13 exits 10-LD bubble700013422012 HE closest Earth approach = 6.92 LD
12322012 HE2 enters 10-LD bubble800011252012 GP1 last observed optically, by Spacewatch 1.8m at 9.05 LD outbound, V=19.69 calculated
11022012 HP13 designation credited to CSS at 14.08 LD inbound, V=19.4 reported, elon. 114.2°
21 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
12052012 HM enters 10-LD bubble700012092012 HM13 designation credited to PS1 at 5.94 LD outbound, r=19.8 reported, elon. 162.1°
10442012 HN1 closest Earth approach = 5.20 LD
09152012 HN last observed optically, by Chabot Obs. at 35.04 LD outbound, R=20.8 reported
08372012 HE last observed optically, by Holmes/CTIO at 7.36 LD inbound, V=18.7 reported
07312012 HE2 last observed optically, by Holmes/CTIO at 11.77 LD inbound, V=19.9 reported
06072012 GP1 closest Earth approach = 8.96 LD
05132012 HQ last observed optically, by Holmes/CTIO at 16.75 LD inbound, V=19.5 reported
20 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
22152012 GW11 exits 10-LD bubble60002338discovery MPEC issued for 2012 HG2
14482012 HG2 exits Earth SOI70002334discovery MPEC issued for 2012 HE2
06312012 HM13 exits Earth SOI710008542012 HG2 designation credited to CSS at 2.24 LD outbound, V=16.3 reported, elon. 161.5°
07502012 HE2 designation credited to CSS at 13.60 LD inbound, V=19.1 reported, elon. 166.7°
19 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
23422012 HD25 exits 10-LD bubble72001931discovery MPEC issued for 2012 HN1
17162012 HM13 exits Earth-Moon system820011392012 HM13 closest Earth approach = 0.73 LD
06022012 HM13 enters Earth-Moon system820108492012 HD25 closest Earth approach = 9.73 LD
01392012 HE enters 10-LD bubble820008262012 GY11 last observed optically, by ARO Westfield at 11.94 LD outbound, V=19.6 reported
06232012 HM13 closest lunar approach = 1.49 LD
03572007 HV4 closest Earth approach = 4.76 LD - Note: JPL has not posted an Earth close
approach listing for this object, indicating an uncertainty exceeding +/- ten days.
18 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
17562012 HD25 enters 10-LD bubble720016132012 GW11 closest Earth approach = 4.94 LD
16482012 HM13 enters Earth SOI620004112012 GW11 last observed optically, by ARO Westfield at 5.30 LD inbound, V=18.9 reported
0029discovery MPEC issued for 2012 HQ
17 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
05082012 GY11 exits 10-LD bubble610023182012 HG2 closest Earth approach = 1.19 LD
01342012 GP1 enters 10-LD bubble710017362012 HG2 closest lunar approach = 2.07 LD
1444discovery MPEC issued for 2012 HN
1442discovery MPEC issued for 2012 HM
10132012 HN1 designation credited to CSS at 7.09 LD inbound, V=19.7 reported, elon. 142.2°
08562012 DN31 last observed optically, by ARO Westfield at 82.94 LD outbound, V=22.1 reported
0026discovery MPEC issued for 2012 HE
16 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
10132012 GW11 enters 10-LD bubble61001801discovery MPEC issued for 2012 GY11
01302012 HM13 enters 10-LD bubble51001757discovery MPEC issued for 2012 GW11
09452012 HQ designation credited to PS1 at 35.91 LD inbound, w=21.0 reported, elon. 172.0°
08152012 HN designation credited to PS1 at 19.22 LD outbound, g=20.0 reported, elon. 134.0°
07582012 HE designation credited to CSS at 14.63 LD inbound, V=19.3 reported, elon. 148.6°
07012012 HM designation credited to LINEAR at 17.45 LD inbound, mag 18.5 reported, elon. 139.3°
06332012 FM35 last observed optically, by Spacewatch 1.8m at 21.05 LD outbound, R=21.4 reported
15 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
07402012 HG2 enters Earth SOI410006262012 GY11 designation credited to CSS at 9.10 LD outbound, V=19.0 reported, elon. 149.9°
05222012 GY11 observed first, by CSS at 9.09 LD outbound, V=19.2 reported, elon. 149.4°
14 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
19402007 HV4 enters 10-LD bubble400014062012 GY11 closest Earth approach = 9.03 LD
08342012 HN1 enters 10-LD bubble300008072012 GW11 designation credited to PS1 at 17.50 LD inbound, w=20.5 reported, elon. 165.9°
13 April 2012
UTBoundary Transitions<10<SIM<1E<1
01352012 HN exits 10-LD bubble2000
12 April 2012
UTEvents
2139discovery MPEC issued for 2012 GP1
11 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
22412012 GD exits 10-LD bubble300006032012 GP1 designation credited to CSS at 13.98 LD inbound, V=20.0 reported, elon. 160.4°
22362012 GY11 enters 10-LD bubble4000
10 April 2012
UTEvents
19172012 HN closest Earth approach = 6.80 LD
08352012 GD closest Earth approach = 9.41 LD
9 April 2012
UTBoundary Transitions<10<SIM<1E<1
17252012 FA57 exits 10-LD bubble3000
15082012 HC25 exits 10-LD bubble4000
8 April 2012
UTBoundary Transitions<10<SIM<1E<1
18362012 GD enters 10-LD bubble5000
14172012 FS35 exits 10-LD bubble4000
12532012 HN enters 10-LD bubble5000
03492012 FH58 exits 10-LD bubble4000
6 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
16532012 EG5 exits 10-LD bubble500007012012 GD last observed optically, by ARO Westfield at 12.82 LD inbound, V=20.4 reported
5 April 2012
UTBoundary Transitions<10<SIM<1E<1
22182012 FA57 exits Earth SOI6000
06042012 HG2 enters 10-LD bubble6100
4 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
16342012 FV23 exits 10-LD bubble510021442012 FA57 closest Earth approach = 1.15 LD
11572012 FQ62 exits 10-LD bubble610009382012 FA57 closest lunar approach = 1.56 LD
02212012 FS52 exits 10-LD bubble7100
3 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
21082012 FA57 enters Earth SOI810021142012 FH58 closest Earth approach = 3.63 LD
18302012 FT35 exits 10-LD bubble800018412012 EG5 last observed optically, by Lister/Faulkes South at 4.53 LD outbound, R=19.5 reported, elon. 66.2°
17112012 FW35 exits 10-LD bubble900009002012 HC25 closest Earth approach = 7.29 LD - Note: JPL reports an approach to 7.28 LD (6.74 minimum) at 0903 UTC with an uncertainty of +/- one hour and 57 minutes.
04542012 GE last observed optically, by Holmes/CTIO at 13.85 LD outbound, V=20.3 reported
04182012 FA57 last observed optically, by Spacewatch 1.8m at 3.74 LD inbound, R=19.1 reported
2 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
15072012 EG5 exits Earth SOI1000020402012 FS52 closest Earth approach = 8.86 LD
2016discovery MPEC issued for 2012 GE
2015discovery MPEC issued for 2012 GD
2007discovery MPEC issued for 2012 FA71
19532012 FQ62 closest Earth approach = 5.65 LD - Note: JPL reports an approach to 5.65 LD (5.63 minimum) .
11322012 FA71 last observed optically, by Spacewatch 1.8m at 57.74 LD outbound, R=20.8 reported
10082012 FQ62 last observed optically, by ARO Westfield at 5.99 LD inbound, V=20.0 reported
04102012 FH58 last observed optically, by ARO Westfield at 5.21 LD inbound, V=19.0 reported
1 April 2012
UTBoundary Transitions<10<SIM<1E<1Events
19402012 EG5 exits Earth-Moon system1010017212012 FW35 closest Earth approach = 8.33 LD
18372012 FM35 exits 10-LD bubble1010109322012 EG5 closest Earth approach = 0.60 LD
15012012 FS52 enters 10-LD bubble1110109122012 GE designation credited to MLS at 9.66 LD outbound, V=19.4 reported, elon. 168.6°
12482012 GE exits 10-LD bubble1010108152012 GD designation credited to MLS at 21.63 LD inbound, V=20.9 reported, elon. 170.4°
03492012 FQ62 enters 10-LD bubble111010311discovery MPEC issued for 2012 FQ62
02462012 EG5 more than one LD from Moon10101


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