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
2012-08-02 13:06:45 c 00 20 12.873 +05 02 52.56 L F51
2012-08-03 00:53:50 C 00 25 37.49 +05 04 37.4 u 160
2012-08-03 00:56:57 C 00 25 38.95 +05 04 38.2 u 160
2012-08-03 01:00:04 C 00 25 40.40 +05 04 38.5 u 160
2012-08-04 00:25:39 C 00 37 41.88 +05 08 12.4 u 160
2012-08-04 00:28:54 C 00 37 43.64 +05 08 12.8 u 160
2012-08-04 00:31:19 C 00 37 44.97 +05 08 13.0 u 160
2012-08-05 01:24:19 C 00 52 43.07 +05 10 56.8 u 160
2012-08-05 01:25:14 C 00 52 43.66 +05 10 56.8 u 160
2012-08-05 01:26:10 C 00 52 44.24 +05 10 57.2 u 160
2012-08-06 01:31:48 C 01 09 53.53 +05 11 57.8 u 160
2012-08-06 01:33:22 C 01 09 54.72 +05 11 57.7 u 160
2012-08-06 01:34:41 C 01 09 55.74 +05 11 57.8 u 160
2012-08-12 03:28:13 C 04 13 48.87 +03 29 32.2 u 160
2012-08-12 03:30:30 C 04 13 52.61 +03 29 28.1 u 160
2012-08-12 03:32:48 C 04 13 56.38 +03 29 24.6 u 160
2013-07-03 07:50:17 C 16 26 18.938 +02 38 49.79 L F51
2013-07-03 08:07:48 C 16 26 18.069 +02 38 44.91 L F51
2013-07-03 08:25:18 C 16 26 17.198 +02 38 40.25 L F51
2015-07-07 07:33:53 C 17 13 17.284 -00 37 52.20 L F51
2015-07-07 08:08:39 C 17 13 15.178 -00 38 00.07 L F51
2015-07-07 08:26:12 C 17 13 14.139 -00 38 03.80 L F51
2018-04-05 11:23:29 C 19 15 39.34 +48 50 41.8 U G96
2018-04-05 11:33:26 C 19 15 33.32 +48 51 02.1 U G96
2018-04-05 11:43:22 C 19 15 27.35 +48 51 22.4 U G96
2018-04-05 11:56:15 C 19 15 19.59 +48 51 48.5 U G96
2018-04-08 16:14:59 S 18 29 47.119 +50 45 00.76 L C51
2018-04-08 16:15:10 S 18 29 46.982 +50 45 01.98 L C51
2018-04-08 19:23:29 S 18 27 55.296 +50 48 04.25 L C51
2018-04-09 11:08:53 C 18 18 39.63 +51 01 42.2 U 703
2018-04-09 11:16:37 C 18 18 34.99 +51 01 48.8 U 703
2018-04-09 11:24:21 C 18 18 30.40 +51 01 54.7 U 703
2018-04-09 11:32:06 C 18 18 25.78 +51 02 00.6 U 703
2018-04-12 10:50:34 C 17 37 48.81 +51 26 03.5 U 703
2018-04-12 10:58:17 C 17 37 44.50 +51 26 03.6 U 703
2018-04-12 11:06:18 C 17 37 40.04 +51 26 03.2 U 703
2018-04-12 11:14:24 C 17 37 35.54 +51 26 02.8 U 703
2018-04-12 13:58:10 C 17 36 06.33 +51 25 56.7 U T05
2018-04-12 14:11:16 C 17 35 59.04 +51 25 55.6 U T05
2018-04-12 14:24:01 C 17 35 51.95 +51 25 54.8 U T05
2018-04-12 14:36:41 C 17 35 44.90 +51 25 53.9 U T05
2018-04-15 08:56:30 C 17 01 27.15 +50 59 59.7 U 703
2018-04-15 09:11:41 C 17 01 19.56 +50 59 50.6 U 703
2018-04-15 09:19:16 C 17 01 15.85 +50 59 45.8 U 703
2018-04-15 09:27:00 C 17 01 12.03 +50 59 40.8 U 703
2018-04-15 09:34:40 C 17 01 08.16 +50 59 35.8 U 703
2018-04-15 09:42:19 C 17 01 04.31 +50 59 30.1 U 703
2018-04-15 09:49:58 C 17 01 00.51 +50 59 25.8 U 703
2018-04-16 13:28:24 C 16 47 53.21 +50 38 18.0 U T05
2018-04-16 13:41:03 C 16 47 47.25 +50 38 07.1 U T05
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)