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
2008-04-16 04:06:16 C 08 19 23.91 +36 19 31.1 r 703
2008-04-16 04:18:52 C 08 19 23.98 +36 19 31.0 r 703
2008-05-12 20:45:59 C 08 47 58.20 +35 55 13.3 r B67
2008-05-12 21:11:36 C 08 47 59.60 +35 55 11.5 r B67
2008-05-12 21:36:37 C 08 48 01.22 +35 55 07.7 r B67
2008-05-23 04:07:50 C 09 04 00.13 +35 27 10.2 o 673
2008-05-23 04:16:51 C 09 04 00.67 +35 27 08.3 o 673
2008-05-23 04:21:05 C 09 04 00.94 +35 27 07.8 o 673
2008-05-23 04:25:19 C 09 04 01.20 +35 27 07.2 o 673
2008-05-23 04:29:31 C 09 04 01.44 +35 27 06.8 o 673
2008-05-29 04:35:24 C 09 13 19.81 +35 07 07.3 r G96
2008-05-29 04:42:33 C 09 13 20.24 +35 07 06.1 r G96
2008-05-29 04:49:41 C 09 13 20.67 +35 07 04.5 r G96
2008-05-29 04:56:53 C 09 13 21.07 +35 07 03.0 r G96
2008-05-31 21:21:50 C 09 17 21.33 +34 57 08.5 r B67
2008-05-31 21:32:47 C 09 17 21.96 +34 57 06.4 r B67
2008-05-31 21:43:56 C 09 17 22.61 +34 57 04.8 r B67
2008-07-16 15:32:08 C 02 08 59.56 -49 55 23.0 r E12
2008-07-16 15:34:22 C 02 08 51.32 -49 55 33.8 r E12
2008-07-16 15:36:37 C 02 08 43.00 -49 55 44.6 r E12
2008-07-16 15:38:44 C 02 08 35.22 -49 55 54.6 r E12
2008-07-16 15:40:58 C 02 08 26.91 -49 56 05.3 r E12
2008-07-16 20:03:55 C 01 52 36.284 -50 10 10.25 r E12
2008-07-16 20:05:53 C 01 52 29.405 -50 10 13.34 r E12
2008-07-16 20:08:14 C 01 52 21.145 -50 10 17.06 r E12
2008-07-25 20:06:21 C 22 48 52.959 -41 42 46.76 r E12
2008-07-25 20:08:26 C 22 48 52.527 -41 42 43.87 r E12
2008-08-09 06:38:00 C 22 17 06.64 -37 45 46.0 r 808
2008-08-09 06:49:00 C 22 17 05.99 -37 45 40.5 r 808
2008-08-09 06:58:59 C 22 17 05.36 -37 45 35.5 r 808
2008-08-11 13:07:20 C 22 14 35.50 -37 20 02.3 c 322
2008-08-11 13:36:47 C 22 14 34.00 -37 19 51.1 c 322
2008-08-11 14:04:44 C 22 14 32.52 -37 19 40.2 c 322
2008-08-11 14:21:47 C 22 14 31.62 -37 19 33.4 c 322
2008-08-13 05:09:29 C 22 12 51.25 -37 01 53.0 r 808
2008-08-13 05:19:29 C 22 12 50.73 -37 01 48.5 r 808
2008-08-13 05:29:30 C 22 12 50.19 -37 01 43.9 r 808
2008-08-15 04:09:29 C 22 11 02.97 -36 40 37.2 r 808
2008-08-15 04:23:59 C 22 11 02.26 -36 40 30.1 r 808
2008-08-15 04:33:31 C 22 11 01.82 -36 40 25.7 r 808
2008-08-28 14:20:24 C 22 02 51.18 -34 14 50.9 r E12
2008-08-28 14:29:51 C 22 02 51.00 -34 14 47.6 r E12
2008-08-28 14:39:18 C 22 02 50.78 -34 14 42.1 r E12
2008-08-28 14:48:42 C 22 02 50.56 -34 14 37.6 r E12
2008-09-20 12:56:30 C 22 03 05.47 -29 47 58.1 r E12
2008-09-20 13:11:47 C 22 03 05.61 -29 47 49.9 r E12
2008-09-20 13:27:03 C 22 03 05.72 -29 47 42.5 r E12
2008-09-20 13:42:19 C 22 03 05.90 -29 47 34.4 r E12
2008-10-01 11:02:34 C 22 08 12.48 -27 37 06.6 r E12
2008-10-01 11:14:15 C 22 08 12.69 -27 37 00.2 r E12
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)