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
2008-03-05 03:15:26 C 08 54 35.56 +31 44 40.9 r 703
2008-03-05 03:24:08 C 08 54 34.88 +31 44 45.1 r 703
2008-03-07 03:21:17 C 08 50 44.65 +32 12 54.5 r 448
2008-03-07 03:35:37 C 08 50 43.47 +32 13 02.5 r 448
2008-03-07 03:49:56 C 08 50 42.29 +32 13 11.1 r 448
2008-03-07 05:21:36 C 08 50 34.54 +32 14 05.1 c 711
2008-03-07 05:33:41 C 08 50 33.56 +32 14 12.4 c 711
2008-03-07 05:45:47 C 08 50 32.63 +32 14 17.3 c 711
2008-03-08 05:17:11 C 08 48 42.64 +32 27 26.2 19.3 c 704
2008-03-08 05:33:01 C 08 48 41.27 +32 27 34.8 19.6 c 704
2008-03-08 05:48:50 C 08 48 40.03 +32 27 42.7 19.5 c 704
2008-03-08 06:04:40 C 08 48 38.77 +32 27 50.7 19.7 c 704
2008-03-08 06:20:33 C 08 48 37.45 +32 27 59.4 20.1 c 704
2008-03-09 05:42:45 C 08 46 49.99 +32 40 36.4 r H45
2008-03-09 05:47:59 C 08 46 49.54 +32 40 39.3 r H45
2008-03-09 05:50:00 C 08 46 49.39 +32 40 39.8 r H45
2008-03-11 05:21:58 C 08 43 17.98 +33 05 03.4 19.2 c 704
2008-03-11 05:37:39 C 08 43 16.80 +33 05 11.8 19.5 c 704
2008-03-11 05:53:12 C 08 43 15.69 +33 05 19.5 19.2 c 704
2008-03-11 06:09:20 C 08 43 14.33 +33 05 25.9 19.6 c 704
2008-03-13 04:33:04 C 08 39 58.10 +33 27 32.6 r 703
2008-03-13 04:43:18 C 08 39 57.38 +33 27 36.9 r 703
2008-03-13 04:53:30 C 08 39 56.52 +33 27 41.2 r 703
2008-03-13 05:03:42 C 08 39 55.83 +33 27 46.4 r 703
2008-03-23 03:24:42 C 08 26 15.20 +34 56 09.3 o H55
2008-03-23 03:33:37 C 08 26 14.90 +34 56 12.0 o H55
2008-03-23 19:08:47 C 08 25 34.11 +35 00 35.2 r A17
2008-03-23 19:22:03 C 08 25 33.53 +35 00 39.0 r A17
2008-03-23 19:34:07 C 08 25 32.95 +35 00 42.6 r A17
2008-03-30 02:26:40 C 08 20 20.67 +35 36 14.8 r 448
2008-03-30 02:43:04 C 08 20 20.18 +35 36 17.9 r 448
2008-03-30 02:59:28 C 08 20 19.67 +35 36 21.0 r 448
2008-03-30 04:36:03 C 08 20 16.80 +35 36 39.4 r 703
2008-03-30 04:47:29 C 08 20 16.54 +35 36 41.7 r 703
2008-03-30 04:58:53 C 08 20 16.15 +35 36 43.8 r 703
2008-03-30 05:10:16 C 08 20 15.86 +35 36 45.7 r 703
2008-04-05 02:31:20 C 08 17 50.92 +35 59 05.7 c 711
2008-04-05 02:39:35 C 08 17 50.80 +35 59 06.8 c 711
2008-04-05 02:47:51 C 08 17 50.68 +35 59 07.8 c 711
2008-04-06 02:52:27 C 08 17 39.63 +36 02 00.6 r H45
2008-04-06 02:55:14 C 08 17 39.63 +36 02 01.0 r H45
2008-04-06 02:57:46 C 08 17 39.60 +36 02 01.1 r H45
2008-04-06 03:02:07 C 08 17 39.54 +36 02 01.4 r H45
2008-04-06 03:05:55 C 08 17 39.52 +36 02 01.9 r H45
2008-04-06 03:17:42 C 08 17 39.39 +36 02 03.2 r H45
2008-04-15 02:04:08 C 08 18 55.12 +36 18 28.8 o H55
2008-04-15 02:21:16 C 08 18 55.37 +36 18 29.5 o H55
2008-04-15 02:41:29 C 08 18 55.65 +36 18 30.2 o H55
2008-04-16 03:41:04 C 08 19 23.44 +36 19 29.3 r 703
2008-04-16 03:53:37 C 08 19 23.66 +36 19 29.3 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)