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
2009-04-20 22:58:34 C 15 27 20.84 +61 35 24.3 o A74
2009-04-20 23:31:53 C 15 27 03.77 +61 33 36.9 o A74
2009-04-21 00:02:38 C 15 26 48.06 +61 31 57.6 o A74
2009-04-21 00:33:24 C 15 26 32.36 +61 30 17.9 o A74
2009-04-21 01:04:09 C 15 26 16.72 +61 28 37.7 o A74
2009-04-25 09:10:23 C 14 46 22.22 +55 53 08.8 r 703
2009-04-25 09:19:30 C 14 46 19.41 +55 52 40.0 r 703
2009-04-25 09:28:40 C 14 46 16.68 +55 52 10.7 r 703
2009-04-25 09:37:51 C 14 46 14.01 +55 51 42.0 r 703
2009-05-13 07:15:53 C 13 48 36.07 +38 05 34.5 r 703
2009-05-13 07:25:33 C 13 48 35.46 +38 05 16.4 r 703
2009-05-13 07:35:04 C 13 48 34.95 +38 04 58.2 r 703
2009-05-13 07:44:48 C 13 48 34.45 +38 04 39.6 r 703
2009-05-17 07:06:23 C 13 44 24.90 +35 11 59.7 r 703
2009-05-17 07:19:32 C 13 44 24.43 +35 11 36.2 r 703
2009-05-17 07:32:32 C 13 44 23.89 +35 11 14.3 r 703
2009-05-17 07:45:40 C 13 44 23.42 +35 10 52.0 r 703
2009-05-19 20:40:43 C 13 42 29.83 +33 29 07.8 r 240
2009-05-19 20:43:22 C 13 42 29.75 +33 29 03.6 r 240
2009-05-19 20:48:40 C 13 42 29.59 +33 28 55.3 r 240
2009-05-19 20:51:20 C 13 42 29.53 +33 28 50.9 r 240
2012-07-05 08:00:35 C 22 38 30.93 +02 19 10.6 u H21
2012-07-05 08:07:34 C 22 38 31.37 +02 19 12.7 u H21
2012-07-05 08:14:22 C 22 38 31.78 +02 19 14.2 u H21
2012-07-07 01:04:59 C 22 41 14.27 +02 30 27.1 u 160
2012-07-07 01:07:00 C 22 41 14.39 +02 30 27.9 u 160
2012-07-07 01:09:00 C 22 41 14.52 +02 30 28.4 u 160
2012-07-07 01:11:00 C 22 41 14.67 +02 30 29.1 u 160
2012-07-14 09:07:55 C 22 54 35.88 +03 17 05.4 18.6 c 704
2012-07-14 09:23:16 C 22 54 37.14 +03 17 09.8 18.8 c 704
2012-07-14 09:38:40 C 22 54 38.42 +03 17 13.5 18.8 c 704
2012-07-14 09:54:19 C 22 54 39.68 +03 17 17.7 18.9 c 704
2012-07-14 10:09:30 C 22 54 40.97 +03 17 21.9 19.0 c 704
2012-07-16 00:23:17 C 22 58 07.27 +03 26 59.5 u 160
2012-07-16 00:26:17 C 22 58 07.56 +03 26 59.9 u 160
2012-07-16 00:29:17 C 22 58 07.84 +03 27 01.0 u 160
2012-07-17 01:08:05 C 23 00 28.97 +03 33 11.2 u 160
2012-07-17 01:11:03 C 23 00 29.25 +03 33 11.7 u 160
2012-07-17 01:14:00 C 23 00 29.47 +03 33 12.8 u 160
2012-07-18 01:03:54 C 23 02 53.40 +03 39 05.9 u 160
2012-07-18 01:06:53 C 23 02 53.70 +03 39 06.5 u 160
2012-07-18 01:09:51 C 23 02 54.00 +03 39 07.2 u 160
2012-07-19 00:20:33 C 23 05 21.82 +03 44 47.5 u 160
2012-07-19 00:23:30 C 23 05 22.13 +03 44 48.2 u 160
2012-07-19 00:26:28 C 23 05 22.46 +03 44 49.1 u 160
2012-07-21 09:16:43 C 23 12 02.80 +03 58 34.5 18.2 c 704
2012-07-21 09:32:38 C 23 12 04.84 +03 58 36.4 17.8 c 704
2012-07-21 09:48:35 C 23 12 06.80 +03 58 41.4 18.4 c 704
2012-07-21 10:04:35 C 23 12 08.71 +03 58 44.6 18.3 c 704
2012-07-21 10:21:14 C 23 12 10.73 +03 58 47.8 18.4 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)