<10=less than 10 LD from Earth

EBN Timeline for December 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)
31 Dec. 2012
UTEvents
08272013 AT27 closest Earth approach = 9.75 LD
30 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
22052013 AC53 enters 10-LD bubble400006162013 AC4 closest Earth approach = 2.64 LD
29 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1
20302013 AT27 enters 10-LD bubble3000
28 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1
20032013 AD32 exits 10-LD bubble2000
15562012 XP55 exits 10-LD bubble3000
03012013 AC4 enters 10-LD bubble4000
27 Dec. 2012
UTEvents
15562013 AD32 closest Earth approach = 9.25 LD - Note: JPL reports an approach to 9.2 LD (9.0 minimum) at 1559 UTC with an uncertainty of +/- 3 minutes.
09452012 XP55 closest Earth approach = 9.17 LD
26 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1
11512013 AD32 enters 10-LD bubble3000
03322012 XP55 enters 10-LD bubble2000
25 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1
23182012 YS1 exits 10-LD bubble1000
02322012 XB112 exits 10-LD bubble2000
24 Dec. 2012
UTEvents
11422012 YS1 closest Earth approach = 8.15 LD
23 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
16022012 YR1 exits 10-LD bubble30002133discovery MPEC issued for 2012 YR3
00062012 YS1 enters 10-LD bubble400020302012 XM55 closest Earth approach = 3.05 LD
11172012 YR3 last observed optically, by MLS at 15.52 LD outbound, V=20.8 reported
03592012 XP55 last observed optically, by ARO Westfield at 16.24 LD inbound, V=18.3 reported
21 Dec. 2012
UTEvents
1547discovery MPEC issued for 2012 YS1
1544discovery MPEC issued for 2012 YR1
12342012 YR3 designation credited to MLS at 11.15 LD outbound, V=20.4 reported, elon. 123.5°
11442012 YS1 last observed optically, by Sandlot Obs. at 14.29 LD inbound, R=18.0 reported
20 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
23132012 YR3 exits 10-LD bubble300009432012 XP2 last observed optically, by Spacewatch 1.8m at 60.38 LD outbound, R=21.4 reported
15172012 XP134 exits 10-LD bubble400006332012 YS1 designation credited to CSS at 18.41 LD inbound, V=19.4 reported, elon. 156.8°
03012012 XL134 exits 10-LD bubble500005012012 YR1 designation credited to LINEAR at 6.02 LD outbound, mag 18.9 reported, elon. 142.2°
02482012 XM16 exits 10-LD bubble600000242012 XM55 last observed optically, by Schiaparelli Obs. at 3.89 LD inbound, R=19.2 reported
19 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
00022012 XN134 exits 10-LD bubble700010172012 YR1 closest Earth approach = 5.83 LD
18 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
17422012 XH112 exits 10-LD bubble800009292012 XT111 last observed optically, by Spacewatch 1.8m at 45.70 LD outbound, V=21.54 calculated
08572012 WR10 last observed optically, by Spacewatch/KPNO at 23.15 LD outbound, R=22.2 reported
17 Dec. 2012
UTEvents
20362012 YR3 closest Earth approach = 6.14 LD - Note: JPL reports an approach to 6.2 LD (6.1 minimum) .
16 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
23502012 XB112 exits Earth SOI900021042012 XL16 last observed optically, by ESA OGS at 33.55 LD outbound, R=20.4 reported
16202012 XL134 exits Earth SOI910020372012 XM16 closest Earth approach = 3.11 LD
15412012 XP134 exits Earth SOI920003412012 XJ112 last observed optically, by Holmes/CTIO at 14.49 LD outbound, V=20.6 reported
05022012 XH112 exits Earth SOI93000042distant 2011 LT17 observed first, by Holmes/CTIO at 48.27 LD, V=19.8 reported, elon. 81.8°
15 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
23102012 XL134 exits Earth-Moon system940020532012 XP134 closest lunar approach = 1.88 LD
21002009 BS5 exits 10-LD bubble940120062012 XH112 closest lunar approach = 2.46 LD
08132012 XL134 enters Earth-Moon system1040117152012 XL134 closest lunar approach = 1.56 LD
05122012 XB112 exits Earth-Moon system1040016322012 XH112 closest Earth approach = 1.72 LD
04022012 XH112 enters Earth SOI1040115422012 XL134 closest Earth approach = 0.72 LD
03442012 YR1 enters 10-LD bubble1030114282012 XP134 closest Earth approach = 1.22 LD
10012012 XB112 closest lunar approach = 1.05 LD
00452012 XN134 last observed optically, by Great Shefford Obs. at 5.24 LD outbound, R=18.8 reported
00102012 XH112 last observed optically, by Great Shefford Obs. at 2.80 LD inbound, R=16.3 reported
14 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
19052012 XE54 exits 10-LD bubble930123582012 XL134 last observed optically, by Great Shefford Obs. at 1.63 LD inbound, R=17.0 reported
17562012 YR3 enters 10-LD bubble1030122532012 XP134 last observed optically, by Great Shefford Obs. at 1.77 LD inbound, R=16.5 reported
15042012 XL134 enters Earth SOI930115052012 XB112 closest Earth approach = 0.82 LD
13162012 XP134 enters Earth SOI92011343discovery MPEC issued for 2012 XP134
07362012 XJ112 exits 10-LD bubble91011340discovery MPEC issued for 2012 XO134
00592012 XB112 enters Earth-Moon system101011337discovery MPEC issued for 2012 XN134
1331discovery MPEC issued for 2012 XL134
1328discovery MPEC issued for 2012 XK134
1325discovery MPEC issued for 2012 XJ134
12512012 XB112 last observed optically, by Tholen team/Mauna Kea at 0.83 LD inbound, R=17.9 reported
0056discovery MPEC issued for 2012 XB133
13 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
14442012 XL55 exits 10-LD bubble1010011222012 XM16 last observed optically, by Tholen team/Mauna Kea at 10.37 LD inbound, R=19.0 reported
14352012 XM16 enters 10-LD bubble1110011012012 XN134 closest Earth approach = 4.60 LD
10262012 WS3 last observed optically, by Tholen team/Mauna Kea at 64.65 LD outbound, R=23.4 reported
08372012 XP134 designation credited to MLS at 4.59 LD inbound, V=18.1 reported, elon. 171.2°
07002012 XO134 designation credited to CSS at 12.41 LD outbound, V=17.8 reported, elon. 142.8°
05462012 XN134 designation credited to MLS at 4.61 LD inbound, V=20.8 reported, elon. 157.0°
05382010 JK1 last observed optically, by CSS at 23.77 LD outbound, V=19.5 reported
04022012 XL134 designation credited to CSS at 5.60 LD inbound, V=20.5 reported, elon. 141.4°
03302012 XK134 designation credited to MLS at 15.90 LD outbound, V=19.9 reported, elon. 161.3°
0015discovery MPEC issued for 2012 XJ112
0013discovery MPEC issued for 2012 XH112
12 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
15272012 XH112 enters 10-LD bubble101001337discovery MPEC issued for 2012 XB112
06272012 XB112 enters Earth SOI910012292012 XJ134 designation credited to PS1 at 25.38 LD outbound, g=17.2 reported, elon. 154.6°
04582012 XE54 exits Earth SOI90001209discovery MPEC issued for 2012 XT111
03082012 XO134 exits 10-LD bubble91001209discovery MPEC issued for 2012 XT111
07072012 XJ112 designation credited to CSS at 5.26 LD outbound, V=18.3 reported, elon. 152.9°
06462012 XH112 designation credited to MLS at 11.16 LD inbound, V=19.4 reported, elon. 170.7°
05542012 XC last observed optically, by ARO Westfield at 54.91 LD outbound, V=22.1 reported
04372012 XB133 designation credited to LINEAR at 11.48 LD outbound, mag 18.8 reported, elon. 154.9°
11 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
21042012 XE54 more than one LD from Moon1010016482012 XE54 closest lunar approach = 0.85 LD
16372012 XE54 exits Earth-Moon system1011015152009 BS5 closest Earth approach = 8.43 LD - Note: JPL reports an approach at 1504 UTC with an uncertainty of +/- 2 hours and 2 minutes.
12332012 XE54 within one LD of Moon1011111112012 XL55 closest Earth approach = 4.24 LD
04312012 XL134 enters 10-LD bubble1010110042012 XE54 closest Earth approach = 0.59 LD
03302012 XE54 enters Earth-Moon system910109072012 XB112 designation credited to MLS at 3.21 LD inbound, V=19.0 reported, elon. 176.7°
07092012 XE54 last observed optically, by Barred Owl Obs. at 0.69 LD inbound, mag 12.5 reported
03402012 XT111 designation credited to MLS at 22.04 LD outbound, V=20.1 reported, elon. 163.7°
10 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
19062012 XB133 exits 10-LD bubble91002057discovery MPEC issued for 2012 XP55
15092012 XE54 enters Earth SOI101002049discovery MPEC issued for 2012 XM55
13572012 XP134 enters 10-LD bubble100002046discovery MPEC issued for 2012 XL55
12582012 XJ112 exits Earth SOI900009382012 XJ112 closest Earth approach = 2.38 LD
06192012 XJ112 enters Earth SOI910004032012 XL55 last observed optically, by MLS at 6.92 LD inbound, V=19.9 reported
9 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
07392012 XL55 enters 10-LD bubble90002211discovery MPEC issued for 2012 XE54
01412012 XM55 enters 10-LD bubble800010242012 XO134 closest Earth approach = 6.97 LD
04092012 XE54 designation credited to CSS at 6.67 LD inbound, V=17.3 reported, elon. 156.7°
8 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
04562012 XJ134 exits 10-LD bubble700008412012 XP55 designation credited to MLS at 62.65 LD inbound, V=20.9 reported, elon. 176.1°
01072012 XE54 enters 10-LD bubble800007302012 XB133 closest Earth approach = 8.83 LD
06432012 XM55 designation credited to MLS at 10.51 LD inbound, V=20.8 reported, elon. 172.4°
04322012 XL55 designation credited to MLS at 14.47 LD inbound, V=20.0 reported, elon. 165.7°
7 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
21222012 XN134 enters 10-LD bubble70002145discovery MPEC issued for 2012 XM16
11322012 XK134 exits 10-LD bubble60002142discovery MPEC issued for 2012 XL16
09442009 BS5 enters 10-LD bubble700010432012 VB37 last observed optically, by Spacewatch 1.8m at 36.70 LD outbound, R=20.8 reported
01502012 XJ134 closest Earth approach = 8.70 LD
6 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
17382012 XO134 enters 10-LD bubble600006442012 XM16 designation credited to MLS at 31.37 LD inbound, V=20.7 reported, elon. 167.3°
11372012 XJ112 enters 10-LD bubble500005372012 XL16 designation credited to CSS at 19.38 LD outbound, V=19.9 reported, elon. 169.5°
5 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
22442012 XJ134 enters 10-LD bubble40001813discovery MPEC issued for 2012 XP2
22342012 XT111 exits 10-LD bubble300005402012 XT111 closest Earth approach = 9.72 LD - Note: JPL has not posted an Earth close
approach listing for this object, indicating an uncertainty exceeding +/- ten days.
19332012 XB133 enters 10-LD bubble4000
4 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
12452012 XT111 enters 10-LD bubble30001803discovery MPEC issued for 2012 XH
05002012 XB112 enters 10-LD bubble200009252012 XP2 designation credited to CSS at 18.60 LD outbound, V=18.4 reported, elon. 150.3°
0249discovery MPEC issued for 2012 XC
3 Dec. 2012
UTEvents
04152012 XH designation credited to MLS at 21.67 LD outbound, V=19.9 reported, elon. 177.2°
2 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
23432012 WH1 exits 10-LD bubble100023002012 WH1 last observed by radar, from Arecibo at 9.97 LD outbound, V=19.17 calculated
09462012 XC designation credited to MLS at 22.05 LD outbound, V=19.8 reported, elon. 171.9°
1 Dec. 2012
UTBoundary Transitions<10<SIM<1E<1Events
02272012 WR10 exits 10-LD bubble200022162012 WH1 first observed by radar, from Arecibo at 8.88 LD outbound, V=18.53 calculated
18212012 WH1 last observed optically, by Great Shefford Obs. at 8.73 LD outbound, R=19.0 reported, elon. 98.1°
16232012 XK134 closest Earth approach = 7.02 LD


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