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
2018-03-28 06:58:35 C 13 50 17.02 +50 11 52.6 U 703
2018-03-28 07:06:22 C 13 50 19.14 +50 12 20.5 U 703
2018-03-28 07:14:07 C 13 50 21.31 +50 12 48.2 U 703
2018-03-28 07:21:54 C 13 50 23.42 +50 13 15.8 U 703
2018-03-29 12:03:31 C 13 59 15.39 +51 54 54.7 U T08
2018-03-29 12:13:57 C 13 59 18.62 +51 55 31.6 U T08
2018-03-29 12:29:38 C 13 59 23.45 +51 56 27.4 U T08
2018-03-29 12:37:25 C 13 59 25.86 +51 56 54.9 U T08
2018-04-05 09:22:20 C 15 21 22.40 +61 33 52.3 U 703
2018-04-05 09:30:33 C 15 21 28.08 +61 34 18.0 U 703
2018-04-05 09:38:47 C 15 21 33.79 +61 34 43.6 U 703
2018-04-05 09:47:12 C 15 21 39.58 +61 35 09.8 U 703
2018-04-06 20:50:16 C 15 49 07.88 +63 15 37.7 U G34
2018-04-06 20:51:52 C 15 49 09.25 +63 15 42.0 U G34
2018-04-06 20:53:40 C 15 49 10.75 +63 15 47.1 U G34
2018-04-06 20:55:05 C 15 49 11.93 +63 15 51.1 U G34
2018-04-06 20:56:41 C 15 49 13.26 +63 15 55.4 U G34
2018-04-06 21:00:05 C 15 49 16.14 +63 16 04.7 U G34
2018-04-09 10:03:04 C 16 47 14.99 +65 21 14.5 U 703
2018-04-09 10:10:43 C 16 47 22.69 +65 21 25.5 U 703
2018-04-09 10:26:04 C 16 47 38.27 +65 21 46.4 U 703
2018-04-09 10:33:35 C 16 47 45.92 +65 21 56.8 U 703
2018-04-09 10:41:15 C 16 47 53.73 +65 22 07.0 U 703
2018-04-09 10:48:55 C 16 48 01.50 +65 22 17.1 U 703
2018-04-09 10:56:34 C 16 48 09.26 +65 22 27.4 U 703
2018-04-12 06:34:22 S 18 03 16.72 +65 43 27.3 L C51
2018-04-12 14:19:57 C 18 12 10.40 +65 37 43.7 U T05
2018-04-12 14:32:38 C 18 12 24.25 +65 37 31.7 U T05
2018-04-12 14:45:20 C 18 12 38.10 +65 37 19.7 U T05
2018-04-12 14:58:10 C 18 12 52.09 +65 37 07.1 U T05
2018-04-13 11:22:31 C 18 35 42.21 +65 09 48.5 U 703
2018-04-13 11:29:31 C 18 35 49.55 +65 09 38.4 U 703
2018-04-13 11:36:32 C 18 35 57.00 +65 09 26.7 U 703
2018-04-13 11:43:32 C 18 36 04.50 +65 09 15.6 U 703
2018-04-15 11:00:32 C 19 25 23.73 +63 18 03.2 U 703
2018-04-15 11:08:26 C 19 25 31.19 +63 17 40.3 U 703
2018-05-23 10:42:24 C 23 44 16.97 +11 37 29.2 U 703
2018-05-23 10:47:38 C 23 44 17.49 +11 37 23.4 U 703
2018-05-23 10:58:04 C 23 44 18.45 +11 37 08.5 U 703
2018-06-21 10:51:55 C 00 42 48.83 +01 51 13.0 U 703
2018-06-21 10:57:06 C 00 42 49.06 +01 51 09.9 U 703
2018-06-21 11:02:16 C 00 42 49.32 +01 51 07.5 U 703
2018-06-21 11:07:27 C 00 42 49.61 +01 51 04.2 U 703
2018-06-25 09:59:00 C 00 48 40.78 +01 02 43.9 U 703
2018-06-25 10:22:52 C 00 48 42.09 +01 02 30.4 U 703
2018-08-19 14:05:59 C 00 53 11.98 -12 19 20.2 U T05
2018-08-19 14:20:36 C 00 53 11.11 -12 19 30.7 U T05
2018-08-19 14:35:56 C 00 53 10.17 -12 19 41.3 U T05
2018-08-19 14:50:33 C 00 53 09.26 -12 19 51.6 U T05
2018-08-21 13:42:09 C 00 50 24.56 -12 52 54.7 U T08
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)