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
1994-08-15 06:31:07 C 20 16 46.82 -25 16 57.2 z 670
1994-08-15 07:00:07 C 20 16 08.01 -25 24 26.4 z 670
1994-08-15 09:17:02 C 20 13 13.58 -25 57 45.4 413
1994-08-15 09:21:46 C 20 13 07.03 -25 59 01.2 413
1994-08-15 11:39:59 20 09 47.06 -26 35 58.7 474
1994-08-15 11:44:30 20 09 40.65 -26 37 11.7 474
1994-08-15 11:47:22 20 09 36.43 -26 37 58.5 474
1994-08-15 11:52:29 20 09 29.00 -26 39 21.0 474
1994-08-15 12:09:59 20 09 11.14 -26 44 26.4 323
1994-08-15 13:48:30 C 20 06 41.60 -27 14 09.1 z 360
1994-08-15 13:52:30 C 20 06 35.51 -27 15 15.9 z 360
1994-08-15 13:57:59 C 20 06 27.16 -27 16 47.7 z 360
1994-08-15 14:15:26 C 20 05 57.98 -27 19 15.8 413
1994-08-15 14:18:17 C 20 05 53.60 -27 20 03.5 413
1994-08-15 17:03:00 20 01 37.75 -28 05 25.9 474
1994-08-15 17:08:00 20 01 29.92 -28 06 50.8 474
1994-08-15 17:41:33 C 20 00 35.65 -28 17 05.1 413
1994-08-15 17:44:04 C 20 00 31.63 -28 17 47.6 413
1994-08-16 08:34:29 19 33 30.74 -32 51 37.5 474
1994-08-16 08:37:30 19 33 24.28 -32 52 36.3 474
1994-08-16 08:39:09 19 33 20.71 -32 53 08.2 474
1994-08-16 09:07:16 C 19 32 24.16 -33 02 39.2 413
1994-08-16 09:10:01 C 19 32 18.18 -33 03 33.4 413
1994-08-16 12:07:09 19 25 46.17 -34 01 39.0 323
1994-08-16 12:34:01 C 19 24 37.20 -34 10 39.5 413
1994-08-16 12:36:26 C 19 24 31.54 -34 11 27.2 413
1994-08-16 16:20:49 C 19 15 29.79 -35 25 00.4 413
1994-08-16 16:23:15 C 19 15 23.75 -35 25 48.2 413
1994-08-16 17:24:12 C 19 12 51.36 -35 45 44.2 413
1994-08-16 17:26:40 C 19 12 45.15 -35 46 32.4 413
1994-08-17 09:06:41 C 18 27 09.95 -40 56 22.0 413
1994-08-17 09:09:41 C 18 26 59.66 -40 57 18.7 413
1994-08-17 13:56:47 C 18 09 55.25 -42 23 12.0 413
1994-08-17 13:59:22 C 18 09 45.70 -42 23 55.8 413
1994-08-17 15:23:50 C 18 04 31.77 -42 47 20.7 413
1994-08-17 15:26:18 C 18 04 22.53 -42 48 01.0 413
1994-08-26 08:55:37 C 11 25 57.27 -21 34 13.9 413
1994-08-26 09:08:39 C 11 25 53.10 -21 33 17.4 413
1995-03-29 19:06:19 C 18 08 22.06 -02 32 24.1 413
1995-03-30 18:30:57 C 18 08 29.96 -02 24 09.1 413
1995-03-30 18:37:50 C 18 08 30.00 -02 24 06.9 413
1996-06-08 19:46:20 C 01 29 39.12 +07 37 04.6 413
1996-06-08 19:49:54 C 01 29 40.04 +07 37 07.8 413
1996-06-09 18:58:24 C 01 35 30.72 +07 57 53.4 413
2000-04-15 01:52:01 C 18 01 49.82 +82 24 52.8 c 118
2000-04-15 01:57:06 C 18 01 31.30 +82 24 44.9 c 118
2000-04-15 01:59:00 C 18 01 24.35 +82 24 42.1 c 118
2000-05-01 13:22:29 C 13 33 05.97 +53 11 59.9 360
2000-05-01 13:25:59 C 13 33 05.75 +53 11 48.0 360
2000-05-01 13:29:29 C 13 33 05.43 +53 11 36.1 360
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)