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
2008-10-01 11:25:29 C 22 08 12.91 -27 36 54.9 r E12
2015-10-13 06:43:36 C 02 22 49.40 +00 57 02.2 u H21
2015-10-13 07:02:36 C 02 22 48.38 +00 56 56.7 u H21
2015-10-13 07:15:48 C 02 22 47.74 +00 56 53.8 u H21
2015-10-17 06:52:02 C 02 17 56.54 +00 31 35.5 u H21
2015-10-17 07:03:08 C 02 17 55.94 +00 31 32.9 u H21
2015-10-17 07:15:05 C 02 17 55.32 +00 31 29.7 u H21
2017-12-25 11:47:41 C 11 05 21.40 +11 29 11.9 U G96
2017-12-25 11:59:15 C 11 05 22.02 +11 29 11.0 U G96
2017-12-25 12:06:42 C 11 05 22.39 +11 29 10.9 U G96
2017-12-25 12:14:10 C 11 05 22.84 +11 29 10.3 U G96
2018-01-14 10:41:28 C 11 31 56.68 +11 48 27.5 U G96
2018-01-14 10:48:54 C 11 31 57.07 +11 48 28.8 U G96
2018-01-14 10:56:20 C 11 31 57.44 +11 48 29.7 U G96
2018-01-14 11:03:45 C 11 31 57.83 +11 48 30.9 U G96
2018-01-20 14:46:17 C 11 39 47.575 +12 17 31.84 U F51
2018-01-20 14:56:11 C 11 39 48.064 +12 17 34.24 U F51
2018-01-20 15:06:10 C 11 39 48.559 +12 17 36.64 U F51
2018-01-20 15:16:04 C 11 39 49.051 +12 17 39.05 U F51
2018-02-07 09:08:41 C 12 01 36.82 +15 15 00.6 U I41
2018-02-07 09:37:54 C 12 01 38.22 +15 15 18.6 U I41
2018-02-07 10:06:21 C 12 01 39.52 +15 15 36.5 U I41
2018-02-07 11:00:24 C 12 01 42.06 +15 16 10.3 U I41
2018-02-08 08:52:28 C 12 02 48.48 +15 30 07.6 U 703
2018-02-08 09:04:20 C 12 02 49.02 +15 30 15.7 U 703
2018-02-08 09:14:03 C 12 02 49.51 +15 30 21.8 U 703
2018-02-08 09:21:36 C 12 02 49.86 +15 30 27.0 U 703
2018-02-09 09:14:17 C 12 04 02.11 +15 46 20.8 U I41
2018-02-09 09:57:43 C 12 04 04.14 +15 46 50.5 U I41
2018-02-09 10:25:35 C 12 04 05.44 +15 47 09.5 U I41
2018-02-09 10:32:00 C 12 04 05.74 +15 47 14.0 U I41
2018-02-09 11:01:38 C 12 04 07.12 +15 47 34.1 U I41
2018-02-11 12:10:45 C 12 06 35.35 +16 22 38.6 U 703
2018-02-11 12:18:25 C 12 06 35.67 +16 22 44.4 U 703
2018-02-11 12:26:07 C 12 06 36.08 +16 22 49.4 U 703
2018-02-16 09:45:19 C 12 12 34.11 +17 59 44.1 U I41
2018-02-16 09:46:45 C 12 12 34.17 +17 59 45.2 U I41
2018-02-16 10:26:22 C 12 12 36.02 +18 00 21.3 U I41
2018-02-16 10:27:47 C 12 12 36.10 +18 00 22.7 U I41
2018-02-16 10:34:53 C 12 12 36.44 +18 00 29.4 U I41
2018-02-16 11:01:15 C 12 12 37.68 +18 00 53.2 U I41
2018-02-17 11:02:27 C 12 13 51.59 +18 23 14.2 U G96
2018-02-17 11:11:36 C 12 13 52.03 +18 23 22.7 U G96
2018-02-17 11:19:48 C 12 13 52.41 +18 23 30.4 U G96
2018-02-17 11:28:00 C 12 13 52.80 +18 23 38.2 U G96
2018-02-23 07:36:08 C 12 21 18.39 +20 52 52.4 U 703
2018-02-23 07:43:45 C 12 21 18.76 +20 53 01.6 U 703
2018-02-23 07:51:23 C 12 21 19.15 +20 53 10.7 U 703
2018-02-23 07:59:00 C 12 21 19.52 +20 53 20.1 U 703
2018-02-26 06:28:48 C 12 25 16.40 +22 21 45.4 U G96
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)