EBN May '09 timeline

<10	=	less than 10 LD from Earth	EBN Timeline for May 2009
<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

31 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
2308	2009 KR21 within one LD of Moon	5	1	1	0	2310	2009 KR21 last observed optically, by Great Shefford Obs. at 1.51 LD inbound, R=16.7 reported
0229	2009 KR21 enters Earth's Hill sphere	5	1	0	0	0534	2009 KR21 discovered by CSS at 3.53 LD inbound, V=17.7 reported, elon. 155.0°
30 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1219	2009 LA exits Earth's Hill sphere	5	0	0	0	0913	2009 KL8 discovered by CSS at 7.68 LD inbound, V=18.2 reported, elon. 113.3°
29 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0609	2009 KL8 enters 10-LD bubble	5	1	0	0	0926	2009 LA closest Earth approach = 2.86 LD
						0119	2009 KW2 last observed optically, by Great Shefford Obs. at 4.57 LD outbound, R=19.0 reported
28 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
2333	2009 KR21 enters 10-LD bubble	4	1	0	0
0911	2009 KW2 exits Earth's Hill sphere	3	1	0	0
0632	2009 LA enters Earth's Hill sphere	3	2	0	0
27 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
0831	2009 LD exits Earth's Hill sphere	3	1	0	0
26 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0635	2009 LD enters Earth's Hill sphere	3	2	0	0	1933	2009 LD closest Earth approach = 3.82 LD
25 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
0749	2009 LA enters 10-LD bubble	3	1	0	0
24 May 2009
						UTC	Events
						2354	2009 KW2 closest lunar approach = 2.28 LD
						2239	2009 KW2 closest Earth approach = 1.34 LD
22 May 2009
						UTC	Events
						1151	2009 KW2 discovered by SSS at 2.93 LD inbound, V=17.0 reported, elon. 123.7°
21 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1210	2009 KW2 enters Earth's Hill sphere	2	1	0	0	0625	2009 HK73 last observed optically, by ARO at 41.26 LD outbound, V=22.8 reported
20 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0638	2009 LD enters 10-LD bubble	2	0	0	0	0536	2009 HG60 last observed optically, by ARO at 109.69 LD outbound, V=21.7 reported
19 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1750	2001 SG286 exits 10-LD bubble	1	0	0	0
18 May 2009
						UTC	Events
						0000	2001 SG286 closest Earth approach = 9.14 LD
17 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
0834	2009 JL2 exits 10-LD bubble	2	0	0	0
16 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
0612	2001 SG286 enters 10-LD bubble	3	0	0	0
15 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1335	2009 KW2 enters 10-LD bubble	2	0	0	0
0522	2009 JL2 exits Earth's Hill sphere	1	0	0	0
14 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
0331	2009 JL2 exits Earth-Moon system	1	1	0	0
13 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1531	2009 JL2 enters Earth-Moon system	1	1	0	1	2149	2009 JL2 closest lunar approach = 1.74 LD
						2131	2009 JL2 closest Earth approach = 0.69 LD
						1504	2009 JL2 last observed optically, by Moriyama Obs. at 1.04 LD inbound, V=16.2 reported, elon. 83.8°
12 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1755	2009 JE1 exits 10-LD bubble	1	1	0	0	0915	2009 JL2 discovered by CSS at 4.42 LD inbound, V=18.1 reported, elon. 109.1°
1340	2009 JL2 enters Earth's Hill sphere	2	1	0	0
10 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1028	2009 JL2 enters 10-LD bubble	2	0	0	0
8 May 2009
						UTC	Events
						1829	2009 JE1 closest Earth approach = 5.07 LD - Note: JPL reports an approach uncertainty of 16 hours and 43 minutes.
7 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
2000	2009 JA exits 10-LD bubble	1	0	0	0
1604	2009 JF1 exits 10-LD bubble	2	0	0	0
6 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1238	2009 JF1 exits Earth's Hill sphere	3	0	0	0
5 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
2231	2009 JF1 exits Earth-Moon system	3	1	0	0	1938	2009 JF1 closest Earth approach = 0.76 LD
1935	2009 JF1 more than one LD from Moon	3	1	0	1	1642	2009 JF1 closest lunar approach = 0.74 LD
1644	2009 JF1 enters Earth-Moon system	3	1	1	1	1549	2009 JF1 last observed optically, by SSS at 1.14 LD inbound, V=16.1 reported
1348	2009 JF1 within one LD of Moon	3	1	1	0
0237	2009 JF1 enters Earth's Hill sphere	3	1	0	0
4 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1927	2009 JE1 enters 10-LD bubble	3	0	0	0	1025	2009 JE1 last observed optically, by MLS at 10.72 LD inbound, V=19.6 reported
1725	2009 JS exits 10-LD bubble	2	0	0	0	1005	2009 JF1 discovered by MLS at 7.57 LD inbound, V=19.3 reported, elon. 168.5°
						0916	2009 JA closest Earth approach = 7.59 LD
						0846	2009 JE1 discovered by MLS at 10.85 LD inbound, V=19.9 reported, elon. 167.1°
						0312	2009 JS last observed optically, by Great Shefford Obs. at 8.82 LD outbound, R=18.2 reported
						0112	2009 JA last observed optically, by NSO/Liverpool Telescope at 7.61 LD inbound, V=18.64 calculated
3 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
2312	2009 JF1 enters 10-LD bubble	3	0	0	0	0726	2009 JS discovered by LINEAR at 7.23 LD outbound, mag 18.1 reported, elon. 170.8°
1015	2009 HK73 exits 10-LD bubble	2	0	0	0
1 May 2009
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0556	2009 JS exits Earth's Hill sphere	3	0	0	0	0642	2009 JA discovered by LINEAR at 9.62 LD inbound, mag 18.4 reported, elon. 166.2°
						0505	2009 HW67 last observed optically, by Spacewatch 1.8m at 33.37 LD outbound, V=21.51 calculated

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EBN Timeline for May 2009