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
2018-08-21 13:56:49 C 00 50 23.69 -12 53 04.8 U T08
2018-08-21 14:10:50 C 00 50 22.68 -12 53 14.3 U T08
2018-08-21 14:25:29 C 00 50 21.71 -12 53 24.1 U T08
2018-09-04 06:59:02 C 00 27 48.93 -16 18 49.6 V 703
2018-09-04 07:07:44 C 00 27 48.32 -16 18 52.9 V 703
2018-09-04 07:23:53 C 00 27 47.13 -16 19 02.5 V 703
2018-09-04 07:32:35 C 00 27 46.47 -16 19 06.0 V 703
2018-09-07 07:02:43 C 00 22 28.44 -16 54 49.4 V 703
2018-09-07 07:10:23 C 00 22 27.96 -16 54 52.5 V 703
2018-09-07 07:18:03 C 00 22 27.40 -16 54 57.4 V 703
2018-09-07 07:25:43 C 00 22 26.83 -16 55 01.2 V 703
2018-09-09 12:51:54 C 00 18 28.99 -17 19 03.0 U T05
2018-09-09 13:07:14 C 00 18 27.81 -17 19 09.5 U T05
2018-09-09 13:22:13 C 00 18 26.68 -17 19 16.6 U T05
2018-09-09 13:37:40 C 00 18 25.49 -17 19 23.2 U T05
2018-09-10 06:26:34 C 00 17 12.02 -17 26 29.8 V 703
2018-09-10 06:49:16 C 00 17 10.24 -17 26 38.0 V 703
2018-09-13 06:44:58 C 00 11 56.70 -17 54 12.7 U 703
2018-09-13 06:52:43 C 00 11 56.06 -17 54 16.1 U 703
2018-09-13 07:08:14 C 00 11 54.95 -17 54 21.6 U 703
2018-09-14 10:18:21 C 00 09 58.63 -18 03 33.2 U T08
2018-09-14 10:29:37 C 00 09 57.83 -18 03 37.7 U T08
2018-09-14 10:39:35 C 00 09 57.10 -18 03 40.1 U T08
2018-09-14 10:54:11 C 00 09 55.98 -18 03 46.0 U T08
2018-09-16 07:43:52 C 00 06 47.75 -18 17 37.4 V G96
2018-09-16 07:51:21 C 00 06 47.21 -18 17 39.4 V G96
2018-09-16 07:58:50 C 00 06 46.68 -18 17 41.7 V G96
2018-09-16 08:06:20 C 00 06 46.12 -18 17 43.7 V G96
2018-10-10 08:58:37 C 23 36 55.999 -18 56 17.79 U F52
2018-10-10 09:15:32 C 23 36 55.416 -18 56 15.76 U F52
2021-01-15 11:32:44 C 07 18 51.957 +22 58 31.16 U F52
2021-01-15 11:49:32 C 07 18 50.869 +22 58 34.90 U F52
2021-01-15 12:06:15 C 07 18 49.801 +22 58 38.67 U F52
2025-10-02 12:07:09 C 02 54 18.354 +04 25 48.46 X F51
2025-10-02 12:26:54 C 02 54 17.554 +04 25 43.08 X F51
2025-10-02 12:46:23 C 02 54 16.800 +04 25 37.97 X F51
2025-10-02 13:05:43 C 02 54 16.020 +04 25 32.98 X F51
2025-10-19 11:25:07 C 02 36 06.442 +02 42 24.08 X F51
2025-10-19 11:43:34 C 02 36 05.551 +02 42 19.69 X F51
2025-10-19 12:01:57 C 02 36 04.623 +02 42 15.36 X F51
2025-10-19 12:20:17 C 02 36 03.690 +02 42 11.02 X F51
2025-10-24 17:05:47 C 02 29 53.913 +02 13 31.19 W O18
2025-10-24 18:22:18 C 02 29 50.027 +02 13 14.32 W O18
2025-10-25 19:04:23 C 02 28 36.407 +02 07 53.65 W O18
2025-10-25 19:58:11 C 02 28 33.688 +02 07 42.05 W O18
2025-10-27 18:05:05 C 02 26 16.689 +01 58 02.60 W O18
2025-10-27 18:57:09 C 02 26 14.044 +01 57 52.03 W O18
2025-10-28 17:07:28 C 02 25 08.486 +01 53 23.04 W O18
2025-10-28 18:22:28 C 02 25 04.706 +01 53 08.01 W O18
2025-10-29 17:10:16 C 02 23 57.494 +01 48 38.56 W O18
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)