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
2008-02-03 23:14:30 C 09 49 01.72 +22 50 05.1 o 246
2008-02-05 20:51:39 C 09 46 30.11 +23 23 24.1 r 176
2008-02-05 20:54:39 C 09 46 29.93 +23 23 26.0 r 176
2008-02-05 20:57:08 C 09 46 29.81 +23 23 27.8 r 176
2008-02-05 20:59:39 C 09 46 29.65 +23 23 29.6 r 176
2008-02-05 21:02:08 C 09 46 29.53 +23 23 31.3 r 176
2008-02-05 21:25:56 C 09 46 27.95 +23 23 48.6 r 143
2008-02-05 21:47:48 C 09 46 26.70 +23 24 04.9 r 143
2008-02-06 05:58:36 C 09 45 58.17 +23 30 11.4 r 703
2008-02-06 06:09:35 C 09 45 57.60 +23 30 19.8 r 703
2008-02-06 06:20:33 C 09 45 56.88 +23 30 27.7 r 703
2008-02-06 06:31:31 C 09 45 56.23 +23 30 35.2 r 703
2008-02-06 06:39:51 C 09 45 55.75 +23 30 42.8 o 291
2008-02-06 06:47:13 C 09 45 55.31 +23 30 48.3 o 291
2008-02-06 06:51:28 C 09 45 55.01 +23 30 52.0 19.8 c 704
2008-02-06 06:54:06 C 09 45 54.89 +23 30 53.5 o 291
2008-02-06 07:09:09 C 09 45 54.00 +23 31 05.0 19.7 c 704
2008-02-06 07:26:49 C 09 45 52.93 +23 31 18.5 20.0 c 704
2008-02-06 07:44:30 C 09 45 51.86 +23 31 31.2 20.1 c 704
2008-02-06 07:59:02 C 09 45 50.88 +23 31 41.5 r 448
2008-02-06 08:16:26 C 09 45 49.81 +23 31 54.2 r 448
2008-02-06 08:18:55 C 09 45 49.815 +23 31 56.52 o 673
2008-02-06 08:25:54 C 09 45 49.355 +23 32 01.75 o 673
2008-02-06 08:30:14 C 09 45 48.97 +23 32 05.2 r 448
2008-02-06 08:39:24 C 09 45 48.545 +23 32 11.41 o 673
2008-02-06 08:43:25 C 09 45 48.309 +23 32 14.38 o 673
2008-02-06 22:11:28 C 09 45 00.85 +23 42 15.2 r B11
2008-02-06 22:24:43 C 09 45 00.01 +23 42 25.1 r B11
2008-02-07 21:12:07 C 09 43 37.28 +23 59 34.7 o 151
2008-02-07 21:16:30 C 09 43 37.04 +23 59 37.8 o 151
2008-02-07 21:20:51 C 09 43 36.79 +23 59 40.9 o 151
2008-02-08 19:57:12 C 09 42 12.30 +24 16 52.2 c A78
2008-02-08 20:11:55 C 09 42 11.37 +24 17 03.5 c A78
2008-02-08 20:30:56 C 09 42 10.09 +24 17 18.2 c A78
2008-02-09 00:02:27 C 09 41 56.16 +24 20 01.8 r 176
2008-02-09 00:04:41 C 09 41 56.02 +24 20 03.5 r 176
2008-02-09 00:06:56 C 09 41 55.87 +24 20 05.2 r 176
2008-02-09 00:09:10 C 09 41 55.73 +24 20 06.6 r 176
2008-02-09 19:53:50 C 09 40 39.78 +24 35 13.5 o 151
2008-02-09 19:58:12 C 09 40 39.50 +24 35 16.9 o 151
2008-02-09 20:02:34 C 09 40 39.22 +24 35 20.2 o 151
2008-02-11 09:28:37 C 09 38 08.50 +25 04 20.5 r H45
2008-02-11 19:54:47 C 09 37 26.73 +25 12 26.5 o 151
2008-02-11 19:57:44 C 09 37 26.48 +25 12 28.7 o 151
2008-02-11 20:00:39 C 09 37 26.21 +25 12 30.6 o 151
2008-02-11 21:06:02 C 09 37 21.65 +25 13 22.3 c A48
2008-02-11 21:16:31 C 09 37 20.90 +25 13 30.9 c A48
2008-02-11 21:27:05 C 09 37 20.16 +25 13 39.4 c A48
2008-02-11 21:37:39 C 09 37 19.42 +25 13 47.7 c A48
2008-02-13 05:13:34 C 09 35 06.61 +25 38 34.5 19.4 c 704
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)