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
2019-06-10 11:29:39 C 20 07 56.038 -02 42 13.97 U F52
2019-06-10 11:47:21 C 20 07 55.403 -02 42 12.46 U F52
2019-07-28 06:27:37 C 18 39 06.38 -06 19 38.3 U I41
2019-07-28 06:32:18 C 18 39 05.88 -06 19 40.8 U I41
2020-04-19 13:02:40 C 17 31 53.273 +06 27 24.85 U F51
2020-04-19 13:18:52 C 17 31 52.369 +06 27 33.02 U F51
2020-04-19 13:51:28 C 17 31 50.552 +06 27 49.51 U F51
2020-04-22 14:02:03 C 17 27 44.590 +07 03 34.49 U F51
2020-04-22 14:16:16 C 17 27 43.711 +07 03 41.31 U F51
2020-04-22 14:29:59 C 17 27 42.867 +07 03 47.99 U F51
2020-04-29 13:11:28 C 17 16 45.979 +08 19 19.46 U F52
2020-04-29 13:28:46 C 17 16 44.716 +08 19 26.65 U F52
2020-04-29 13:46:05 C 17 16 43.436 +08 19 33.93 U F52
2020-04-29 14:03:22 C 17 16 42.159 +08 19 41.12 U F52
2020-05-02 11:18:21 C 17 11 36.981 +08 47 21.06 U F52
2020-05-02 11:39:08 C 17 11 35.355 +08 47 28.80 U F52
2020-05-02 11:56:03 C 17 11 34.045 +08 47 35.59 U F52
2020-05-17 09:34:30 C 16 42 00.575 +10 23 36.46 U F51
2020-05-17 09:51:19 C 16 41 59.088 +10 23 38.85 U F51
2020-05-17 10:08:10 C 16 41 57.598 +10 23 41.27 U F51
2020-05-19 12:06:16 C 16 37 37.458 +10 29 53.63 U F51
2020-05-19 12:23:22 C 16 37 35.949 +10 29 55.39 U F51
2020-05-19 12:40:18 C 16 37 34.449 +10 29 57.14 U F51
2020-05-19 12:57:16 C 16 37 32.952 +10 29 58.87 U F51
2020-05-21 09:04:59 C 16 33 44.10 +10 33 50.3 V G96
2020-05-21 09:12:32 C 16 33 43.41 +10 33 50.8 V G96
2020-05-21 09:20:04 C 16 33 42.76 +10 33 51.5 V G96
2020-05-21 09:27:37 C 16 33 42.11 +10 33 52.1 V G96
2020-06-15 09:45:25 C 15 48 52.582 +09 13 37.25 U F51
2020-06-15 10:02:47 C 15 48 51.566 +09 13 31.95 U F51
2020-06-15 10:20:09 C 15 48 50.535 +09 13 26.66 U F51
2020-06-15 10:37:42 C 15 48 49.509 +09 13 21.31 U F51
2020-06-21 09:41:39 C 15 41 20.578 +08 26 16.98 U F51
2020-06-21 09:59:38 C 15 41 19.703 +08 26 10.58 U F51
2020-06-21 10:17:40 C 15 41 18.831 +08 26 04.18 U F51
2020-06-21 10:35:38 C 15 41 17.947 +08 25 57.65 U F51
2021-06-08 10:40:33 C 22 16 33.67 -00 34 18.1 V G96
2021-06-08 10:54:50 C 22 16 34.58 -00 34 13.0 V G96
2021-06-08 11:02:25 C 22 16 35.05 -00 34 10.3 V G96
2021-06-08 11:08:40 C 22 16 35.45 -00 34 08.2 V G96
2021-07-01 13:48:00 C 22 58 52.77 +02 49 24.3 V T08
2021-07-01 13:53:58 C 22 58 53.39 +02 49 26.9 V T08
2021-07-01 14:05:54 C 22 58 54.42 +02 49 31.8 V T08
2021-07-01 14:39:50 C 22 58 57.58 +02 49 45.2 V T08
2021-07-05 12:41:38 C 23 08 35.00 +03 27 46.3 V T08
2021-07-05 12:50:17 C 23 08 35.89 +03 27 50.0 V T08
2021-07-05 12:54:15 C 23 08 36.30 +03 27 51.9 V T08
2021-07-05 13:16:01 C 23 08 38.62 +03 28 00.8 V T08
2021-07-07 11:28:26 C 23 13 53.09 +03 47 24.9 V T05
2021-07-07 11:38:22 C 23 13 54.22 +03 47 28.6 V 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)