450894 (2008 BT18)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5946032813 ± 5.82e-09
Semi-major axis (a)2.2193602800 AU ± 1.03e-09
Inclination (i)8.14558352° ± 2.54e-06
Long. of Asc. Node (Ω)107.52549950° ± 7.28e-06
Arg. of Perihelion (ω)139.39358812° ± 7.54e-06
Mean Anomaly (M)97.82055920° ± 1.46e-06
Mean Motion (n)0.2981058937°/day ± 2.07e-10
Perihelion dist (q)0.89972138 AU ± 1.29e-08
Aphelion dist (Q)3.53899918 AU ± 1.30e-08
Orbital Period3.30629586 yr ± 2.29e-09
Physical Parameters
H (abs. magnitude)18.17
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.329″
Uncertainty0
Orbit TypeApollo
MOID0.013407 AU
Observations Used416
Radar Obs Used3
Oppositions37
Arc Total1955-2025
First Observation Used1955-03-14
Last Observation Used2025-11-26
Observations (453)
Date Type RA Dec Mag Band Observatory
1955-03-14 05:26:00 09 50 25.61 +35 24 17.7 c 261
1955-03-14 06:15:59 09 50 20.98 +35 25 11.7 c 261
1998-01-29 08:07:15 C 08 41 39.08 +23 48 11.0 c 566
1998-01-29 08:21:16 C 08 41 38.10 +23 48 18.4 c 566
1998-01-29 08:35:19 C 08 41 37.08 +23 48 25.1 c 566
2005-09-25 09:44:57 C 02 19 15.12 +00 04 30.5 o 705
2005-09-25 09:46:08 C 02 19 15.07 +00 04 30.0 o 705
2005-09-25 09:49:43 C 02 19 14.90 +00 04 28.9 o 705
2005-09-26 09:49:58 C 02 18 09.11 -00 03 33.5 o 705
2005-09-26 09:51:10 C 02 18 09.05 -00 03 33.8 o 705
2005-09-26 09:54:44 C 02 18 08.89 -00 03 35.0 o 705
2008-01-31 09:54:50 C 09 53 16.61 +21 50 27.1 19.7 c 704
2008-01-31 10:13:04 C 09 53 15.64 +21 50 38.6 19.6 c 704
2008-01-31 10:31:12 C 09 53 14.90 +21 50 49.7 19.9 c 704
2008-01-31 10:49:20 C 09 53 13.80 +21 51 03.5 20.0 c 704
2008-02-01 05:46:59 C 09 52 21.32 +22 03 59.0 o 673
2008-02-01 05:55:30 C 09 52 20.88 +22 04 05.1 o 673
2008-02-01 06:06:00 C 09 52 20.36 +22 04 12.8 o 673
2008-02-01 06:19:09 C 09 52 19.70 +22 04 22.1 o 673
2008-02-01 06:28:40 C 09 52 19.14 +22 04 28.4 r G96
2008-02-01 06:45:23 C 09 52 18.31 +22 04 39.7 r G96
2008-02-01 06:53:52 C 09 52 17.88 +22 04 45.8 r G96
2008-02-01 21:51:51 C 09 51 34.30 +22 15 04.3 r J95
2008-02-01 21:57:46 C 09 51 34.03 +22 15 08.3 r J95
2008-02-01 22:03:40 C 09 51 33.72 +22 15 12.5 r J95
2008-02-02 19:49:38 C 09 50 28.19 +22 30 28.6 o 151
2008-02-02 19:58:40 C 09 50 27.75 +22 30 35.7 o 151
2008-02-02 20:12:03 C 09 50 27.07 +22 30 46.9 o 151
2008-02-03 07:42:05 C 09 49 50.82 +22 38 58.4 o H55
2008-02-03 07:46:57 C 09 49 50.54 +22 39 01.9 o H55
2008-02-03 07:51:50 C 09 49 50.28 +22 39 05.4 o H55
2008-02-03 07:56:43 C 09 49 50.00 +22 39 08.8 o H55
2008-02-03 19:39:04 C 09 49 13.52 +22 47 28.4 c A50
2008-02-03 19:42:23 C 09 49 13.32 +22 47 31.2 c A50
2008-02-03 19:44:50 C 09 49 13.19 +22 47 33.4 c A50
2008-02-03 20:21:02 C 09 49 11.25 +22 47 59.6 c A50
2008-02-03 20:38:01 C 09 49 10.40 +22 48 12.4 r A13
2008-02-03 21:09:49 C 09 49 08.64 +22 48 34.0 r A13
2008-02-03 22:37:11 C 09 49 03.78 +22 49 37.4 o 246
2008-02-03 22:38:52 C 09 49 03.66 +22 49 38.9 o 246
2008-02-03 22:40:09 C 09 49 03.63 +22 49 40.0 o 246
2008-02-03 22:41:08 C 09 49 03.57 +22 49 41.1 o 246
2008-02-03 22:42:27 C 09 49 03.52 +22 49 41.5 o 246
2008-02-03 22:43:34 C 09 49 03.48 +22 49 42.3 o 246
2008-02-03 23:05:59 C 09 49 02.22 +22 49 58.8 o 246
2008-02-03 23:07:41 C 09 49 02.12 +22 49 59.9 o 246
2008-02-03 23:10:14 C 09 49 01.95 +22 50 01.5 o 246
2008-02-03 23:11:18 C 09 49 01.91 +22 50 02.7 o 246
2008-02-03 23:12:25 C 09 49 01.81 +22 50 03.2 o 246
2008-02-03 23:13:26 C 09 49 01.78 +22 50 04.4 o 246
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2008-07-06 17:46:00 205143.4113 2 Hz 2380 -1 -1
2008-07-06 19:30:00 60891468.71 2 us 2380 -1 -1
2008-07-06.740278 20514341 200 Hz 2380 251 251
2008-07-06.812500 6089146871 2000 us 2380 251 251
2008-07-07 17:32:00 54147421 1 us 2380 -1 -1
2008-07-07.730556 5414742100 1000 us 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)