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
2001-06-21 01:21:06 C 19 41 46.86 -02 28 28.2 c 493
2001-06-21 01:27:27 C 19 41 46.49 -02 28 27.9 c 493
2001-07-24 05:48:33 C 18 34 27.83 -05 30 26.1 d 711
2001-07-24 06:05:56 C 18 34 26.70 -05 30 24.3 d 711
2001-07-24 06:21:37 C 18 34 25.28 -05 30 30.1 d 711
2002-03-15 11:47:17 C 17 47 42.88 -00 11 41.7 d 291
2002-03-15 11:57:00 C 17 47 42.96 -00 11 36.3 d 291
2002-03-15 12:02:56 C 17 47 43.01 -00 11 32.1 d 291
2003-06-07 10:25:20 C 21 50 01.32 -01 18 52.4 c 673
2003-06-07 10:34:09 C 21 50 01.67 -01 18 50.1 c 673
2003-06-07 10:43:00 C 21 50 02.06 -01 18 47.1 c 673
2003-06-07 10:51:49 C 21 50 02.51 -01 18 45.2 c 673
2003-06-07 11:00:40 C 21 50 02.82 -01 18 42.2 c 673
2003-06-07 11:09:29 C 21 50 03.08 -01 18 39.9 c 673
2003-06-08 10:24:10 C 21 51 01.12 -01 12 03.2 c 673
2003-06-08 10:34:30 C 21 51 01.50 -01 12 00.4 c 673
2003-06-08 10:43:20 C 21 51 01.90 -01 11 57.6 c 673
2003-06-08 11:09:49 C 21 51 03.04 -01 11 49.4 c 673
2003-06-08 11:15:19 C 21 51 03.25 -01 11 48.2 c 673
2003-06-08 11:20:10 C 21 51 03.44 -01 11 46.7 c 673
2003-07-09 09:01:01 C 22 18 15.31 +01 42 27.2 18.5 c 644
2003-07-09 09:27:29 C 22 18 16.08 +01 42 30.9 18.5 c 644
2003-07-09 09:47:45 C 22 18 16.68 +01 42 33.8 18.6 c 644
2003-07-20 01:43:03 C 22 26 29.03 +02 02 34.5 d 170
2003-07-20 01:46:23 C 22 26 29.13 +02 02 34.6 d 170
2003-07-23 10:51:34 C 22 29 12.35 +01 58 26.8 17.5 c 644
2003-07-23 11:07:53 C 22 29 12.84 +01 58 25.1 16.9 c 644
2003-07-23 11:24:17 C 22 29 13.32 +01 58 23.5 16.4 c 644
2003-07-25 00:55:36 C 22 30 34.03 +01 53 42.1 d 941
2003-07-25 00:56:15 C 22 30 34.06 +01 53 41.9 d 941
2003-07-25 00:57:34 C 22 30 34.10 +01 53 41.7 d 941
2003-07-25 00:58:14 C 22 30 34.12 +01 53 41.6 d 941
2003-07-25 00:58:53 C 22 30 34.14 +01 53 41.6 d 941
2003-07-26 22:43:45 C 22 32 17.66 +01 45 00.4 c 130
2003-07-26 22:48:10 C 22 32 17.80 +01 44 59.5 c 130
2003-07-26 22:52:35 C 22 32 17.98 +01 44 58.4 c 130
2003-07-26 22:57:01 C 22 32 18.08 +01 44 57.5 c 130
2003-07-27 00:56:27 C 22 32 22.07 +01 44 28.2 d 557
2003-07-27 01:02:51 C 22 32 22.28 +01 44 26.8 d 557
2003-07-27 01:22:03 C 22 32 22.94 +01 44 22.4 d 557
2003-07-29 00:17:22 C 22 34 19.16 +01 31 01.1 c 204
2003-07-29 00:23:10 C 22 34 19.40 +01 30 58.7 c 204
2003-07-29 00:31:22 C 22 34 19.67 +01 30 55.9 c 204
2003-07-29 00:42:17 C 22 34 20.09 +01 30 52.1 c 204
2003-07-29 23:16:30 C 22 35 21.01 +01 22 27.9 c 196
2003-07-29 23:44:01 C 22 35 22.14 +01 22 16.5 c 196
2003-07-30 00:32:36 C 22 35 24.11 +01 21 56.6 c 196
2003-08-01 08:07:48 C 22 38 12.68 +00 54 14.3 16.2 c 704
2003-08-01 08:22:47 C 22 38 13.39 +00 54 05.5 16.3 c 704
2003-08-01 08:37:48 C 22 38 14.09 +00 53 56.3 16.2 c 704
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)