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
2018-04-16 13:49:47 C 16 47 43.09 +50 37 59.8 U T05
2018-04-16 13:53:50 C 16 47 41.18 +50 37 56.2 U T05
2018-04-16 14:02:31 C 16 47 37.09 +50 37 48.6 U T05
2018-04-16 14:06:31 C 16 47 35.20 +50 37 44.8 U T05
2018-04-16 14:15:09 C 16 47 31.14 +50 37 37.9 U T05
2018-04-16 14:29:37 C 16 47 24.31 +50 37 24.8 U T05
2018-04-19 09:21:04 C 16 18 46.20 +49 26 45.4 U 703
2018-04-19 09:28:49 C 16 18 43.02 +49 26 35.8 U 703
2018-04-19 09:36:35 C 16 18 39.90 +49 26 26.7 U 703
2018-04-19 09:44:37 C 16 18 36.64 +49 26 16.7 U 703
2018-04-22 05:00:12 C 15 54 01.11 +47 55 48.8 U W71
2018-04-22 05:03:27 C 15 54 00.02 +47 55 44.3 U W71
2018-04-22 05:13:55 C 15 53 56.44 +47 55 29.5 U W71
2018-04-22 05:17:01 C 15 53 55.31 +47 55 24.9 U W71
2018-04-23 03:57:48 C 15 46 31.61 +47 21 58.3 U W71
2018-04-23 04:00:50 C 15 46 30.58 +47 21 53.5 U W71
2018-04-23 04:15:04 C 15 46 26.01 +47 21 32.9 U W71
2018-04-23 04:19:03 C 15 46 24.70 +47 21 26.9 U W71
2018-04-24 03:47:33 C 15 39 11.82 +46 45 43.9 U W71
2018-04-24 03:49:48 C 15 39 11.22 +46 45 40.7 U W71
2018-04-24 03:52:14 C 15 39 10.52 +46 45 36.6 U W71
2018-04-24 03:56:46 C 15 39 09.15 +46 45 29.5 U W71
2018-04-24 11:54:46 C 15 36 47.17 +46 33 19.7 U T05
2018-04-24 12:05:33 C 15 36 43.97 +46 33 03.3 U T05
2018-04-24 12:08:13 C 15 36 43.12 +46 32 59.0 U T05
2018-04-24 12:18:43 C 15 36 39.99 +46 32 42.5 U T05
2018-04-24 12:20:45 C 15 36 39.39 +46 32 39.4 U T05
2018-04-24 12:35:40 C 15 36 34.91 +46 32 15.9 U T05
2018-04-24 12:37:03 C 15 36 34.50 +46 32 13.8 U T05
2018-04-24 12:53:18 C 15 36 29.62 +46 31 48.4 U T05
2018-04-25 09:04:23 C 15 30 46.38 +46 00 03.0 U 703
2018-04-25 09:12:25 C 15 30 44.12 +45 59 50.3 U 703
2018-04-25 09:20:22 C 15 30 41.89 +45 59 37.6 U 703
2018-04-25 09:28:16 C 15 30 39.66 +45 59 24.9 U 703
2018-04-26 07:46:50 C 15 24 41.54 +45 23 48.9 U I41
2018-04-26 08:10:00 C 15 24 35.27 +45 23 13.1 U 703
2018-04-26 08:18:26 C 15 24 32.98 +45 22 59.4 U 703
2018-04-26 08:25:28 C 15 24 31.22 +45 22 47.2 U I41
2018-04-26 08:26:50 C 15 24 30.84 +45 22 45.1 U I41
2018-04-26 08:27:16 C 15 24 30.58 +45 22 46.3 U 703
2018-04-26 08:43:04 C 15 24 26.52 +45 22 19.1 U I41
2018-04-29 03:11:24 C 15 08 37.12 +43 34 09.1 U W34
2018-04-29 03:32:59 C 15 08 32.34 +43 33 34.9 U W34
2018-04-29 03:44:57 C 15 08 29.66 +43 33 15.8 U W34
2018-05-06 07:31:35 C 14 38 22.17 +38 54 44.7 U G96
2018-05-06 07:39:06 C 14 38 21.09 +38 54 32.8 U G96
2018-05-06 07:46:37 C 14 38 20.02 +38 54 21.1 U G96
2018-05-06 07:54:05 C 14 38 18.93 +38 54 09.0 U G96
2018-05-06 07:57:06 C 14 38 18.48 +38 54 04.1 U 703
2018-05-06 08:04:43 C 14 38 17.44 +38 53 52.2 U 703
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)