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
2021-08-03 10:55:44 S 02 36 05.064 +10 01 58.84 L C51
2021-08-03 14:04:03 S 02 38 29.606 +10 03 21.42 L C51
2022-05-22 13:40:55 C 17 36 27.843 +03 18 51.03 U F52
2022-05-22 13:57:27 C 17 36 26.748 +03 18 53.60 U F52
2022-05-22 14:13:57 C 17 36 25.656 +03 18 56.60 U F52
2022-05-28 12:19:11 C 17 26 53.454 +03 38 45.55 U F52
2022-05-28 12:34:58 C 17 26 52.321 +03 38 47.12 U F52
2022-05-28 13:06:15 C 17 26 50.145 +03 38 50.62 U F52
2022-06-02 11:14:35 C 17 18 33.524 +03 48 23.14 U F52
2022-06-02 11:25:42 C 17 18 32.725 +03 48 23.74 U F52
2022-06-02 11:47:55 C 17 18 31.113 +03 48 24.94 U F52
2024-06-27 08:47:52 C 17 31 39.825 -00 10 34.35 X F52
2024-06-27 09:00:22 C 17 31 38.968 -00 10 36.09 X F52
2024-06-27 09:12:53 C 17 31 38.116 -00 10 37.65 X F52
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)