EBN Dec. '08 timeline

<10	=	less than 10 LD from Earth	EBN Timeline for December 2008
<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 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1427	2008 YB29 exits 10-LD bubble	2	0	0	0	1201	2008 YY32 discovered by CSS at 9.39 LD inbound, V=18.18 calculated, elon. 159.3°
0352	2008 YY32 enters 10-LD bubble	3	0	0	0	1011	2008 YY32 observed first, by CSS at 9.53 LD inbound, V=18.3 reported, elon. 159.4°
						0701	2008 YH30 discovered by Spacewatch 0.9m at 13.76 LD outbound, V=20.0 reported, elon. 166.8°
						0633	2008 YG30 discovered by CSS at 12.51 LD inbound, V=18.0 reported, elon. 157.6°
						0517	2008 YV32 discovered by MLS at 18.81 LD inbound, V=20.5 reported, elon. 154.1°
30 Dec. 2008
						UTC	Events
						2232	207398 2006 AS2 observed first, by MPC Code A74 at 165.82 LD inbound, V=19.9 reported, elon. 155.5°
						1325	2008 YC29 last observed optically, by CSS at 7.41 LD inbound, V=18.6 reported
						1008	2008 YC29 discovered by CSS at 7.73 LD inbound, V=19.1 reported, elon. 138.6°
						0918	2008 YB29 discovered by CSS at 8.73 LD outbound, V=19.2 reported, elon. 146.2°
						0558	2008 YF29 discovered by CSS at 30.62 LD inbound, V=19.9 reported, elon. 155.6°
29 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1433	2008 YH30 exits 10-LD bubble	2	0	0	0	1216	2008 WY94 last observed optically, by MRO at 23.94 LD outbound, R=23.2 reported, elon. 69.2°
1211	2008 YC29 enters 10-LD bubble	3	0	0	0
0055	2008 EV5 exits 10-LD bubble	2	0	0	0
27 Dec. 2008
						UTC	Events
						1438	2008 YB29 closest Earth approach = 7.34 LD
						0730	2008 EV5 last observed by radar, from Arecibo at 9.17 LD outbound, V=13.21 calculated
26 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0612	2008 YH30 exits Earth's Hill sphere	3	0	0	0	1818	2008 YQ2 last observed optically, by MPC Code J95 at 11.04 LD outbound, R=19.7 reported, elon. 99.8°
0451	2008 YQ2 exits 10-LD bubble	3	1	0	0
25 Dec. 2008
						UTC	Events
						1424	2008 YH30 closest Earth approach = 3.58 LD
24 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
2236	2008 YH30 enters Earth's Hill sphere	4	1	0	0	1453	2008 YQ2 closest Earth approach = 8.58 LD
23 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1437	2008 YB29 enters 10-LD bubble	4	0	0	0	1516	2008 EV5 closest Earth approach = 8.41 LD
0059	2008 YQ2 enters 10-LD bubble	3	0	0	0
21 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1355	2008 YH30 enters 10-LD bubble	2	0	0	0	0955	2008 YQ2 discovered by CSS at 13.51 LD inbound, V=18.3 reported, elon. 145.0°
						0945	2008 YQ2 observed first, by CSS at 13.52 LD inbound, V=18.5 reported, elon. 144.9°
						0326	2008 YN2 discovered by MLS at 13.47 LD outbound, V=19.9 reported, elon. 139.1°
18 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1042	2008 YN2 exits 10-LD bubble	1	0	0	0
0248	2008 EV5 enters 10-LD bubble	2	0	0	0
17 Dec. 2008
						UTC	Events
						0940	2008 EV5 first observed by radar, from DSS-14 at 10.39 LD inbound, V=14.68 calculated
16 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1726	2008 XB2 exits 10-LD bubble	1	0	0	0
0001	2008 XC1 exits 10-LD bubble	2	0	0	0
14 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
2203	2008 WY94 exits 10-LD bubble	3	0	0	0	1425	2008 YN2 closest Earth approach = 7.57 LD
13 Dec. 2008
						UTC	Events
						0842	2008 XB2 closest Earth approach = 5.77 LD
						0104	2008 XB2 last observed optically, by ARO at 5.82 LD inbound, V=19.0 reported, elon. 94.3°
12 Dec. 2008
						UTC	Events
						1813	2008 XC1 closest Earth approach = 4.13 LD
11 Dec. 2008
						UTC	Events
						0759	2008 XC1 last observed optically, by MPC Code H36 at 5.76 LD inbound, R=15.7 reported
10 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1808	2008 YN2 enters 10-LD bubble	4	0	0	0
0041	2008 XK exits 10-LD bubble	3	0	0	0
9 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1
2350	2008 XB2 enters 10-LD bubble	4	0	0	0
1227	2008 XC1 enters 10-LD bubble	3	0	0	0
0136	2008 WG14 exits 10-LD bubble	2	0	0	0
8 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1
0247	2008 XS exits 10-LD bubble	3	0	0	0
7 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1746	2008 XK exits Earth's Hill sphere	4	0	0	0	1156	2008 UW99 last observed optically, by MRO at 103.43 LD outbound, R=21.8 reported
1629	2008 WY94 exits Earth's Hill sphere	4	1	0	0	1138	208023 1999 AQ10 observed first, by ARO at 150.12 LD inbound, V=20.9 reported, elon. 106.5°
						1018	2008 WM61 last observed optically, by ARO at 10.67 LD outbound, V=21.7 reported, elon. 95.9°
						0616	2008 XS last observed optically, by ARO at 9.52 LD outbound, V=20.2 reported
						0525	2008 WG14 last observed optically, by MPC Code J95 at 6.28 LD outbound, R=19.4 reported, elon. 68.7°
6 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
1759	2008 WM61 exits 10-LD bubble	4	2	0	0	1140	2008 XK closest Earth approach = 1.73 LD - Note: JPL reports an approach to 1.5 LD (0.5 minimum) at 2239 UTC with an uncertainty of 21 hours and 46 minutes.
						0801	2008 XK closest lunar approach = 2.56 LD
						0743	2008 WG96 last observed optically, by Spacewatch 1.8m at 29.26 LD outbound, V=22.1 reported
						0616	2008 XU2 discovered by MLS at 14.48 LD outbound, V=19.8 reported, elon. 141.3°
						0506	2004 XK3 last observed optically, by Spacewatch 0.9m at 28.18 LD outbound, V=19.34 calculated
5 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0535	2008 XK enters Earth's Hill sphere	5	2	0	0	1453	2008 WG14 closest Earth approach = 4.76 LD
						0941	2008 WY94 closest Earth approach = 3.16 LD
4 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0953	2008 XU2 exits 10-LD bubble	5	1	0	0	0437	2008 XB2 discovered by MPC Code 704 at 23.10 LD inbound, mag 19.5 reported, elon. 165.9°
3 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
0246	2008 WY94 enters Earth's Hill sphere	6	1	0	0	0849	2008 XC1 discovered by CSS at 26.87 LD inbound, V=18.6 reported, elon. 160.5°
2 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1		Events
2243	2008 XK enters 10-LD bubble	6	0	0	0	0848	2008 XK last observed optically, by MRO at 11.60 LD inbound, R=20.6 reported
0421	2008 WG14 enters 10-LD bubble	5	0	0	0	0643	2008 XK discovered by MLS at 11.84 LD inbound, V=20.8 reported, elon. 155.7°
						0610	2008 XS discovered by MPC Code 704 at 7.34 LD outbound, mag 19.5 reported, elon. 175.5°
1 Dec. 2008
UTC	Boundary Transitions	<10	<HS	M<1	E<1
1818	2008 XU2 exits Earth's Hill sphere	4	0	0	0
0256	2008 WC exits 10-LD bubble	4	1	0	0

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EBN Timeline for December 2008