<10=less than 10 LD from Earth

EBN Timeline for December 2011

<HS=inside Earth's Hill sphere
M<1=less than 1 LD from the Moon
E<1=less than 1 LD from Earth (intruder)
LD = lunar distance = distance between Earth & Moon

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31 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
09152011 YB63 enters Earth's Hill sphere1030022282012 AP10 closest lunar approach = 1.48 LD
03052011 YE40 exits 10-LD bubble1020009172011 YC63 observed first, by MLS at 5.48 LD, V=20.44 calculated, elon. 168.2°
00082011 YC63 exits Earth's Hill sphere1120003582011 YB63 observed first, by MLS at 4.30 LD, V=21.1 reported, elon. 135.8°
30 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
11562011 YX15 exits 10-LD bubble1130020272012 AP10 closest Earth approach = 1.06 LD - Note: JPL reports an approach uncertainty of +/- 5 minutes.
09452012 AQ exits Earth-Moon system1230014182011 YE40 closest Earth approach = 9.88 LD
07372011 YW15 exits 10-LD bubble1230107422011 YC40 last observed optically, by MLS at 5.53 LD outbound, V=21.7 reported
06412011 YC63 exits Earth-Moon system1330103112011 YE40 observed first, by LINEAR at 9.97 LD, mag 18.9 reported, elon. 149.1°
01322011 YE40 enters 10-LD bubble1330202152011 YC63 closest Earth approach = 0.63 LD
00422011 YD29 closest Earth approach = 6.00 LD
00032011 YC63 closest lunar approach = 1.51 LD
29 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
22572012 BC14 enters 10-LD bubble1230218122011 YE29 closest Earth approach = 7.02 LD
22092011 YL28 enters 10-LD bubble1130210002011 YH40 observed first, by CSS at 38.74 LD, V=19.2 reported, elon. 141.3°
21492011 YC63 enters Earth-Moon system1030209552011 YT62 observed first, by CSS at 62.32 LD, V=19.9 reported, elon. 138.9°
15522011 YC40 exits Earth's Hill sphere1030108312012 AQ closest Earth approach = 0.70 LD
13002012 AQ more than one LD from Moon1040108092011 YE29 observed first, by LINEAR at 7.13 LD, mag 18.0 reported, elon. 129.6°
08452000 YA exits 10-LD bubble1041107572011 YD29 observed first, by CSS at 6.09 LD, V=18.7 reported, elon. 137.7°
04222011 YC63 enters Earth's Hill sphere1141106312011 YC40 observed first, by MLS at 2.93 LD, V=19.9 reported, elon. 158.0°
28 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
11412011 YC40 exits Earth-Moon system1131121422011 WS95 closest Earth approach = 7.11 LD
07162012 AQ enters Earth-Moon system1131218562011 XC2 last observed optically, by Great Shefford Obs. at 118.61 LD outbound, R=22.2 reported
02472011 YB63 enters 10-LD bubble1131111262012 AQ closest lunar approach = 0.79 LD
05202011 YL28 observed first, by LINEAR at 12.76 LD, mag 19.6 reported, elon. 144.0°
05052011 YQ1 last observed optically, by Spacewatch 0.9m at 36.40 LD outbound, V=21.23 calculated
02292011 YC40 closest Earth approach = 0.28 LD
27 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
23492011 YC40 more than one LD from Moon1031117462011 YC40 closest lunar approach = 0.79 LD
17232011 YC63 enters 10-LD bubble1032114492000 YA last observed by radar, from Arecibo at 5.11 LD outbound, V=nil
17172011 YC40 enters Earth-Moon system932108132011 YX15 observed first, by CSS at 8.28 LD, V=18.0 reported, elon. 135.5°
11442011 YC40 within one LD of Moon932008052011 YW15 observed first, by CSS at 7.27 LD, V=17.3 reported, elon. 149.5°
10022012 AQ within one LD of Moon931006492011 YX15 closest Earth approach = 8.28 LD
08332011 YE29 enters 10-LD bubble9300
02142000 YA exits Earth's Hill sphere8300
26 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
13052011 YC40 enters Earth's Hill sphere840019122011 WS95 last observed optically, by LIMIT at 8.19 LD inbound, V=16.3 reported
08072012 AP10 enters Earth's Hill sphere830005362000 YA closest Earth approach = 2.87 LD
25 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
08582000 YA enters Earth's Hill sphere8200
06362011 WS95 enters 10-LD bubble8100
24 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
16082011 YD29 enters 10-LD bubble710004552000 YA last observed optically, by Palmer Divide Obs. at 6.84 LD inbound, R=15.9 reported
02022011 YC40 enters 10-LD bubble6100
01112011 YX15 enters 10-LD bubble5100
23 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
12562012 AQ enters Earth's Hill sphere410002102000 YA first observed by radar, from Arecibo at 10.04 LD inbound, V=16.79 calculated
02312000 YA enters 10-LD bubble4000
22 Dec. 2011
UTEvents
20262011 YW15 closest Earth approach = 5.12 LD
18 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
19142012 AP10 enters 10-LD bubble300000462011 YQ1 observed first, by Crni Vrh Obs. at 9.11 LD, R=17.9 reported, elon. 161.0°
08542011 YQ1 exits 10-LD bubble2000
16 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
00312011 YQ1 exits Earth's Hill sphere3000
15 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
07552011 YW15 enters 10-LD bubble3100
14 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
00542012 AQ enters 10-LD bubble210021532011 YQ1 closest lunar approach = 1.24 LD
14192011 YQ1 closest Earth approach = 1.02 LD
13 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
04072011 YQ1 enters Earth's Hill sphere1100
11 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
00062003 XV exits 10-LD bubble1000
10 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
19472011 YQ1 enters 10-LD bubble2000
8 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
16212003 XV exits Earth's Hill sphere100004452011 XC2 observed first, by LINEAR at 21.42 LD, mag 18.3 reported, elon. 125.2°
7 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
03102003 XV more than one LD from Moon110006412003 XV closest Earth approach = 1.06 LD
6 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
17072011 WU74 exits 10-LD bubble111021512003 XV last observed optically, by Great Shefford Obs. at 1.44 LD inbound, R=16.0 reported
16212003 XV within one LD of Moon211021442003 XV closest lunar approach = 0.79 LD
5 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1
20592003 XV enters Earth's Hill sphere2100
18142011 XC2 exits 10-LD bubble2000
4 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
20342011 WV74 exits 10-LD bubble300010142011 WU74 closest Earth approach = 4.21 LD
10402011 XC2 exits Earth's Hill sphere4000
3 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
20242011 XC2 more than one LD from Moon410016192011 XC2 closest lunar approach = 0.62 LD
17302011 XC2 exits Earth-Moon system411015192011 XC2 closest Earth approach = 0.90 LD
13132003 XV enters 10-LD bubble4111
13082011 XC2 enters Earth-Moon system3111
12142011 XC2 within one LD of Moon3110
06042011 WV74 exits Earth's Hill sphere3100
2 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
19582011 XC2 enters Earth's Hill sphere320011342011 WV74 closest Earth approach = 2.27 LD
03202011 WU74 enters 10-LD bubble310005452011 WU74 last observed optically, by ARO Westfield at 9.64 LD inbound, V=19.5 reported
1 Dec. 2011
UTBoundary Transitions<10<HSM<1E<1Events
17042011 WV74 enters Earth's Hill sphere210013002011 WV74 last observed optically, by Mt. John Obs. at 4.47 LD inbound, R=19.0 reported
12252011 XC2 enters 10-LD bubble200009222011 WF44 last observed optically, by PS1 at 39.85 LD outbound, w=21.3 reported
04282011 WJ15 last observed optically, by ARO Westfield at 63.86 LD outbound, V=22.49 calculated

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