37655 Illapa (1994 PM)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7524459845 ± 2.00e+00
Semi-major axis (a)1.4777488909 AU ± 3.00e+00
Inclination (i)18.03316723° ± 4.00e+00
Long. of Asc. Node (Ω)139.51239265° ± 5.00e+00
Arg. of Perihelion (ω)303.91768440° ± 6.00e+00
Mean Anomaly (M)114.45024937° ± 3.42e-06
Mean Motion (n)0.5486701244°/day ± 1.67e+00
Perihelion dist (q)0.36582267 AU ± 3.05e+00
Aphelion dist (Q)2.58967511 AU ± 6.03e+00
Orbital Period1.79639138 yr ± 5.47e+00
NGA Modelr2
A2-1.04259752e-06 AU/d²
Physical Parameters
H (abs. magnitude)17.85
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.365″
Uncertainty0
Orbit TypeApollo
MOID0.024446 AU
Observations Used638
Oppositions13
Arc Total1994-2024
First Observation Used1994-08-01
Last Observation Used2024-06-27
Observations (664)
Date Type RA Dec Mag Band Observatory
2003-08-05 23:39:41 C 22 46 25.24 -00 51 27.9 c J93
2003-08-05 23:41:45 C 22 46 25.46 -00 51 31.4 c J93
2003-08-06 15:05:06 C 22 48 02.73 -01 14 42.8 m 379
2003-08-06 15:07:16 C 22 48 02.94 -01 14 46.3 m 379
2003-08-06 15:09:25 C 22 48 03.17 -01 14 49.7 m 379
2003-08-06 15:13:43 C 22 48 03.60 -01 14 56.8 m 379
2003-08-06 15:19:17 C 22 48 04.14 -01 15 05.9 m 379
2003-08-06 20:55:26 C 22 48 43.83 -01 24 32.2 a 589
2003-08-06 21:18:02 C 22 48 46.32 -01 25 10.9 a 589
2003-08-06 21:57:27 C 22 48 50.63 -01 26 18.9 a 589
2003-08-06 22:24:24 C 22 48 53.54 -01 27 05.6 a 589
2003-08-07 00:00:25 C 22 49 03.98 -01 29 56.8 c 198
2003-08-07 00:17:11 C 22 49 05.79 -01 30 26.4 c 198
2003-08-07 00:35:38 C 22 49 07.78 -01 30 59.0 c 198
2003-08-07 00:52:56 C 22 49 09.66 -01 31 29.6 c 198
2003-08-07 01:08:00 C 22 49 11.29 -01 31 56.3 c 198
2003-08-07 22:25:17 C 22 52 00.58 -02 13 44.6 c 246
2003-08-07 22:27:29 C 22 52 00.87 -02 13 49.3 c 246
2003-08-07 22:29:39 C 22 52 01.18 -02 13 54.3 c 246
2003-08-07 22:31:08 C 22 52 01.36 -02 13 57.3 c 246
2003-08-07 22:33:05 C 22 52 01.63 -02 14 01.5 c 246
2003-08-07 22:37:19 C 22 52 02.19 -02 14 10.9 c 246
2003-08-08 01:19:56 C 22 52 24.61 -02 20 03.6 d 170
2003-08-08 01:21:43 C 22 52 24.82 -02 20 07.7 d 170
2003-08-08 01:22:53 C 22 52 24.97 -02 20 09.7 d 170
2003-08-08 01:26:24 C 22 52 25.42 -02 20 18.0 d 170
2003-08-08 20:57:04 C 22 55 37.24 -03 08 30.3 a 589
2003-08-08 21:25:41 C 22 55 42.07 -03 09 48.7 a 589
2003-08-08 22:05:33 C 22 55 48.79 -03 11 39.0 a 589
2003-08-08 22:28:06 C 22 55 52.57 -03 12 41.7 a 589
2003-08-08 22:40:29 C 22 55 54.66 -03 13 17.5 c 130
2003-08-08 23:07:16 C 22 55 59.16 -03 14 32.6 c 130
2003-08-08 23:22:17 C 22 56 01.72 -03 15 14.8 c 130
2003-08-08 23:26:12 C 22 56 03.30 -03 15 20.9 d J87
2003-08-08 23:29:49 C 22 56 03.88 -03 15 31.2 d J87
2003-08-08 23:30:51 C 22 56 03.12 -03 15 39.0 c 130
2003-08-08 23:32:47 C 22 56 04.28 -03 15 39.0 d J87
2003-08-08 23:49:04 C 22 56 06.17 -03 16 29.9 c 130
2003-08-08 23:57:36 C 22 56 07.62 -03 16 54.3 c 130
2003-08-09 00:14:36 C 22 56 10.47 -03 17 42.4 c 130
2003-08-09 00:24:17 C 22 56 12.08 -03 18 09.7 c 130
2003-08-09 00:42:31 C 22 56 15.15 -03 19 01.6 c 130
2003-08-09 00:56:28 C 22 56 17.54 -03 19 41.2 c 130
2003-08-09 01:10:24 C 22 56 19.90 -03 20 21.1 c 130
2003-08-09 02:46:33 C 22 56 36.36 -03 24 57.9 c 130
2003-08-09 23:00:09 C 23 00 54.29 -04 31 00.6 c 130
2003-08-09 23:19:00 C 23 00 58.45 -04 32 09.8 c 130
2003-08-09 23:39:31 C 23 01 02.96 -04 33 25.5 c 130
2003-08-10 00:03:47 C 23 01 08.33 -04 34 55.8 c 130
2003-08-10 00:23:41 C 23 01 13.31 -04 36 05.4 d 170
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2003-08-19 17:30:00 -1329216.328 4 Hz 8560 -14 -14
2012-08-13 12:00:00 96859666.31 2 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)