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
2008-02-13 05:30:42 C 09 35 05.34 +25 38 47.6 20.5 c 704
2008-02-13 05:48:01 C 09 35 04.00 +25 39 00.6 20.0 c 704
2008-02-13 06:05:19 C 09 35 02.79 +25 39 14.2 19.9 c 704
2008-02-13 06:22:30 C 09 35 01.42 +25 39 28.6 19.7 c 704
2008-02-21 05:40:55 C 09 20 19.95 +28 08 49.6 o H55
2008-02-21 05:45:30 C 09 20 19.58 +28 08 52.6 o H55
2008-02-21 05:50:42 C 09 20 19.15 +28 08 56.7 o H55
2008-02-24 21:24:54 C 09 13 05.31 +29 14 46.8 o A44
2008-02-24 21:45:21 C 09 13 03.54 +29 15 01.8 o A44
2008-02-24 21:53:32 C 09 13 02.81 +29 15 08.4 o A44
2008-02-27 04:20:06 C 09 08 28.89 +29 54 33.0 r 703
2008-02-27 04:30:30 C 09 08 28.03 +29 54 40.2 r 703
2008-02-27 04:40:50 C 09 08 27.06 +29 54 47.6 r 703
2008-02-27 04:51:11 C 09 08 25.94 +29 54 54.6 r 703
2008-02-27 06:21:29 C 09 08 17.98 +29 55 58.2 r H45
2008-02-27 06:34:42 C 09 08 16.82 +29 56 07.5 r H45
2008-02-27 06:37:56 C 09 08 16.54 +29 56 09.7 r H45
2008-02-27 06:45:45 C 09 08 15.87 +29 56 14.8 r H45
2008-02-27 06:47:52 C 09 08 15.67 +29 56 16.1 r H45
2008-02-27 06:50:00 C 09 08 15.51 +29 56 17.9 r H45
2008-02-28 06:16:00 C 09 06 17.23 +30 12 44.8 r H45
2008-02-28 06:26:27 C 09 06 16.38 +30 12 52.0 r H45
2008-02-28 06:28:26 C 09 06 16.14 +30 12 53.5 r H45
2008-02-28 06:30:23 C 09 06 15.99 +30 12 54.9 r H45
2008-02-28 06:32:27 C 09 06 15.82 +30 12 56.2 r H45
2008-02-28 06:34:24 C 09 06 15.65 +30 12 57.6 r H45
2008-02-29 05:08:20 C 09 04 22.36 +30 28 32.1 19.2 c 704
2008-02-29 05:24:18 C 09 04 20.90 +30 28 43.6 19.9 c 704
2008-02-29 05:40:16 C 09 04 19.51 +30 28 53.7 19.7 c 704
2008-02-29 05:56:17 C 09 04 18.06 +30 29 04.2 19.9 c 704
2008-02-29 06:12:08 C 09 04 16.71 +30 29 15.1 19.5 c 704
2008-03-01 06:51:17 C 09 02 12.29 +30 45 51.0 r H45
2008-03-01 06:57:40 C 09 02 11.76 +30 45 54.9 r H45
2008-03-01 06:59:36 C 09 02 11.57 +30 45 56.8 r H45
2008-03-01 07:01:31 C 09 02 11.40 +30 45 57.9 r H45
2008-03-01 07:03:30 C 09 02 11.23 +30 45 59.0 r H45
2008-03-01 07:05:57 C 09 02 11.03 +30 46 00.5 r H45
2008-03-01 08:27:16 C 09 02 04.16 +30 46 55.1 r G96
2008-03-01 08:36:42 C 09 02 03.37 +30 47 01.2 r G96
2008-03-01 08:46:03 C 09 02 02.54 +30 47 07.3 r G96
2008-03-01 08:55:33 C 09 02 01.75 +30 47 13.6 r G96
2008-03-01 22:23:56 C 09 00 54.69 +30 56 07.1 c 560
2008-03-01 22:29:26 C 09 00 54.22 +30 56 10.3 c 560
2008-03-01 22:31:15 C 09 00 54.05 +30 56 11.7 c 560
2008-03-02 21:56:00 C 08 58 57.43 +31 11 23.4 r 130
2008-03-02 21:59:48 C 08 58 57.07 +31 11 25.6 r 130
2008-03-02 22:02:52 C 08 58 56.82 +31 11 28.2 r 130
2008-03-02 22:05:45 C 08 58 56.56 +31 11 30.1 r 130
2008-03-05 02:58:00 C 08 54 37.08 +31 44 29.0 r 703
2008-03-05 03:06:45 C 08 54 36.36 +31 44 34.1 r 703
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)