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
1994-08-01 07:53:14 A 21 57 21.64 -00 55 44.5 675
1994-08-01 08:36:14 A 21 57 18.82 -00 56 24.3 16.5 675
1994-08-02 07:45:29 A 21 55 52.06 -01 19 35.3 675
1994-08-02 08:30:29 A 21 55 48.60 -01 20 23.3 675
1994-08-07 07:23:59 A 21 43 43.20 -04 32 45.5 15.5 675
1994-08-07 08:05:44 A 21 43 36.41 -04 34 25.2 675
1994-08-09 07:42:44 A 21 34 55.80 -06 51 43.4 14.5 675
1994-08-09 08:07:15 A 21 34 49.89 -06 53 09.5 675
1994-08-10 08:02:31 C 21 28 54.92 -08 26 14.6 657
1994-08-10 08:05:14 C 21 28 54.12 -08 26 26.3 657
1994-08-10 08:07:41 C 21 28 53.41 -08 26 36.8 657
1994-08-10 13:47:01 21 27 16.08 -08 49 55.8 474
1994-08-10 13:55:00 21 27 13.51 -08 50 34.0 474
1994-08-10 21:59:35 C 21 24 48.43 -09 30 23.5 z 104
1994-08-10 22:01:50 C 21 24 47.63 -09 30 34.6 z 104
1994-08-10 22:10:56 C 21 24 44.61 -09 31 20.0 z 104
1994-08-10 22:16:47 C 21 24 42.64 -09 31 48.5 z 104
1994-08-10 22:34:09 C 21 24 36.85 -09 33 14.7 z 104
1994-08-11 21:21:14 C 21 16 25.38 -11 39 22.4 z 111
1994-08-11 21:24:25 C 21 16 24.05 -11 39 42.2 z 111
1994-08-11 21:27:51 C 21 16 22.62 -11 40 03.8 z 111
1994-08-11 21:31:01 C 21 16 21.26 -11 40 23.3 z 111
1994-08-11 21:33:55 C 21 16 20.01 -11 40 41.0 z 111
1994-08-12 00:35:11 C 21 15 01.65 -11 59 46.9 z 587
1994-08-12 00:39:22 C 21 14 59.81 -12 00 13.7 z 587
1994-08-12 03:32:24 C 21 13 48.29 -12 18 59.2 14.3 z 816
1994-08-12 03:42:59 C 21 13 43.47 -12 20 09.4 14.3 z 816
1994-08-12 03:52:54 C 21 13 38.94 -12 21 15.1 14.1 z 816
1994-08-12 03:55:53 C 21 13 37.57 -12 21 34.8 14.1 z 816
1994-08-12 04:00:57 C 21 13 35.26 -12 22 08.5 14.0 z 816
1994-08-12 04:20:59 C 21 13 26.00 -12 24 21.5 z 801
1994-08-12 04:24:25 C 21 13 24.24 -12 24 43.9 z 801
1994-08-12 06:30:55 C 21 12 25.57 -12 38 57.4 14.3 z 816
1994-08-12 06:37:35 C 21 12 22.45 -12 39 42.4 14.1 z 816
1994-08-12 06:42:21 C 21 12 20.19 -12 40 14.9 14.1 z 816
1994-08-12 06:46:41 C 21 12 18.14 -12 40 44.5 14.1 z 816
1994-08-12 09:51:32 21 10 57.66 -13 00 05.5 474
1994-08-12 10:03:01 21 10 51.99 -13 01 27.0 474
1994-08-12 12:24:09 C 21 09 44.44 -13 20 15.4 z 398
1994-08-12 12:26:22 C 21 09 43.31 -13 20 31.6 z 398
1994-08-12 12:33:02 C 21 09 39.93 -13 21 20.2 z 398
1994-08-12 23:08:21 C 21 04 06.59 -14 43 15.2 z 587
1994-08-12 23:10:14 C 21 04 05.48 -14 43 31.0 z 587
1994-08-12 23:14:02 C 21 04 03.27 -14 44 02.2 z 587
1994-08-13 13:30:00 20 55 21.81 -16 48 40.1 323
1994-08-14 13:15:57 C 20 36 06.09 -21 14 22.4 z 398
1994-08-14 13:21:18 C 20 36 00.77 -21 15 30.0 z 398
1994-08-15 05:57:37 C 20 17 31.22 -25 08 19.6 z 670
1994-08-15 06:05:07 C 20 17 21.33 -25 10 15.8 z 670
1994-08-15 06:15:07 C 20 17 08.11 -25 12 49.7 z 670
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)