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
2012-07-28 01:27:35 C 23 38 49.30 +04 35 16.5 u 160
2012-07-28 01:29:56 C 23 38 49.81 +04 35 17.0 u 160
2012-07-28 01:32:19 C 23 38 50.32 +04 35 17.4 u 160
2012-07-28 07:56:19 C 23 40 17.67 +04 36 46.5 u H45
2012-07-28 07:57:38 C 23 40 17.96 +04 36 46.9 u H45
2012-07-28 07:58:41 C 23 40 18.20 +04 36 47.0 u H45
2012-07-28 07:59:56 C 23 40 18.48 +04 36 47.4 u H45
2012-07-28 08:01:30 C 23 40 18.83 +04 36 47.9 u H45
2012-07-29 00:44:28 C 23 44 18.44 +04 40 24.6 u 160
2012-07-29 00:46:47 C 23 44 19.01 +04 40 25.1 u 160
2012-07-29 00:49:09 C 23 44 19.57 +04 40 25.6 u 160
2012-07-30 00:22:56 C 23 50 30.87 +04 45 32.5 u 160
2012-07-30 00:25:17 C 23 50 31.50 +04 45 32.9 u 160
2012-07-30 00:27:38 C 23 50 32.13 +04 45 33.4 u 160
2012-07-31 01:55:24 C 23 58 04.22 +04 50 58.1 u 160
2012-07-31 01:59:11 C 23 58 05.39 +04 50 59.0 u 160
2012-07-31 02:02:54 C 23 58 06.53 +04 50 59.7 u 160
2012-08-01 00:26:23 C 00 05 38.90 +04 55 35.3 u 160
2012-08-01 00:28:46 C 00 05 39.74 +04 55 35.5 u 160
2012-08-01 00:31:07 C 00 05 40.56 +04 55 36.2 u 160
2012-08-02 00:52:05 C 00 14 59.54 +05 00 20.3 u C73
2012-08-02 00:53:15 C 00 15 00.02 +05 00 20.5 u C73
2012-08-02 00:54:25 C 00 15 00.50 +05 00 20.9 u C73
2012-08-02 00:55:35 C 00 15 00.95 +05 00 21.0 u C73
2012-08-02 00:56:44 C 00 15 01.45 +05 00 21.3 u C73
2012-08-02 00:57:54 C 00 15 01.88 +05 00 21.5 u C73
2012-08-02 00:59:03 C 00 15 02.32 +05 00 21.9 u C73
2012-08-02 01:00:13 C 00 15 02.78 +05 00 21.9 u C73
2012-08-02 01:01:22 C 00 15 03.29 +05 00 22.2 u C73
2012-08-02 01:02:30 C 00 15 03.76 +05 00 22.3 u C73
2012-08-02 01:03:39 C 00 15 04.26 +05 00 22.5 u C73
2012-08-02 01:04:49 C 00 15 04.66 +05 00 22.6 u C73
2012-08-02 01:05:58 C 00 15 05.19 +05 00 23.2 u C73
2012-08-02 01:07:07 C 00 15 05.68 +05 00 23.0 u C73
2012-08-02 01:08:17 C 00 15 06.08 +05 00 23.6 u C73
2012-08-02 01:09:27 C 00 15 06.49 +05 00 22.7 u C73
2012-08-02 01:10:36 C 00 15 07.03 +05 00 23.9 u C73
2012-08-02 01:10:46 C 00 15 07.69 +05 00 24.6 u 160
2012-08-02 01:11:46 C 00 15 07.48 +05 00 24.2 u C73
2012-08-02 01:13:49 C 00 15 08.92 +05 00 25.2 u 160
2012-08-02 01:16:54 C 00 15 10.17 +05 00 25.8 u 160
2012-08-02 08:15:45 C 00 18 06.12 +05 01 46.1 u H21
2012-08-02 08:17:06 C 00 18 06.69 +05 01 46.3 u H21
2012-08-02 08:19:17 C 00 18 07.60 +05 01 46.8 u H21
2012-08-02 08:23:22 C 00 18 09.32 +05 01 47.4 u H21
2012-08-02 08:25:17 C 00 18 10.12 +05 01 47.8 u H21
2012-08-02 08:27:28 C 00 18 11.03 +05 01 48.2 u H21
2012-08-02 08:31:32 C 00 18 12.75 +05 01 49.1 u H21
2012-08-02 12:32:23 c 00 19 58.110 +05 02 46.27 L F51
2012-08-02 12:50:19 c 00 20 05.817 +05 02 49.62 L F51
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)