136993 (1998 ST49)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5954841834 ± 9.03e-09
Semi-major axis (a)2.3089660226 AU ± 1.05e-09
Inclination (i)24.47489654° ± 3.96e-06
Long. of Asc. Node (Ω)18.18522525° ± 1.53e-06
Arg. of Perihelion (ω)48.11355347° ± 3.84e-06
Mean Anomaly (M)253.30267173° ± 1.08e-06
Mean Motion (n)0.2809221367°/day ± 1.92e-10
Perihelion dist (q)0.93401328 AU ± 2.08e-08
Aphelion dist (Q)3.68391877 AU ± 2.09e-08
Orbital Period3.50853904 yr ± 2.39e-09
Physical Parameters
H (abs. magnitude)17.85
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.620″
Uncertainty0
Orbit TypeApollo
MOID0.053935 AU
Observations Used960
Radar Obs Used7
Oppositions10
Arc Total1998-2012
First Observation Used1998-09-29
Last Observation Used2020-04-28
Observations (1267)
Date Type RA Dec Mag Band Observatory
2020-02-26 18:14:21 s 1 -124949.78 8 +388277.69 1060.0 C57
2020-02-26 18:44:21 S 12 06 07.980 +51 55 41.41 V C57
2020-02-26 18:44:21 s 1 -125933.24 7 +387807.96 9390.0 C57
2020-02-26 19:14:21 S 12 06 02.362 +51 55 09.12 V C57
2020-02-26 19:14:21 s 1 -126914.43 9 +387330.78 7200.0 C57
2020-02-26 19:44:21 S 12 05 56.081 +51 54 31.43 V C57
2020-02-26 19:44:21 s 1 -127893.34 3 +386846.16 4490.0 C57
2020-02-26 20:14:21 S 12 05 50.604 +51 54 04.82 V C57
2020-02-26 20:14:21 s 1 -128869.93 7 +386354.09 1220.0 C57
2020-02-26 21:14:21 S 12 05 38.506 +51 52 51.49 V C57
2020-02-26 21:14:21 s 1 -130816.10 7 +385347.61 2950.0 C57
2020-02-26 22:44:21 S 12 05 19.651 +51 51 17.64 V C57
2020-02-26 22:44:21 s 1 -133717.49 2 +383782.08 5840.0 C57
2020-02-26 23:14:21 S 12 05 14.138 +51 50 44.81 V C57
2020-02-26 23:14:21 s 1 -134679.76 8 +383245.35 8790.0 C57
2020-02-27 01:14:21 S 12 04 49.526 +51 48 27.94 V C57
2020-02-27 01:14:21 s 1 -138504.00 8 +381024.01 3270.0 C57
2020-02-27 01:44:21 S 12 04 44.134 +51 47 51.86 V C57
2020-02-27 01:44:21 s 1 -139453.74 1 +380450.06 2440.0 C57
2020-02-27 02:14:21 S 12 04 37.699 +51 47 20.22 V C57
2020-02-27 02:14:21 s 1 -140400.89 7 +379868.67 780.0 C57
2020-02-27 03:44:21 S 12 04 19.762 +51 45 36.11 V C57
2020-02-27 03:44:21 s 1 -143226.67 6 +378079.82 630.0 C57
2020-02-27 04:14:21 S 12 04 13.354 +51 45 03.53 V C57
2020-02-27 04:14:21 s 1 -144163.29 6 +377468.64 5440.0 C57
2020-02-27 06:44:21 S 12 03 43.942 +51 42 15.23 V C57
2020-02-27 06:44:21 s 1 -148805.53 5 +374300.98 4860.0 C57
2020-02-27 07:44:21 S 12 03 31.231 +51 41 06.22 V C57
2020-02-27 07:44:21 s 1 -150642.91 8 +372981.72 1360.0 C57
2020-02-27 08:14:21 S 12 03 25.226 +51 40 26.26 V C57
2020-02-27 08:14:21 s 1 -151557.33 2 +372310.91 7950.0 C57
2020-02-27 08:44:21 S 12 03 19.454 +51 39 59.72 V C57
2020-02-27 08:44:21 s 1 -152468.86 0 +371632.63 3400.0 C57
2020-02-27 10:14:21 S 12 03 01.591 +51 38 13.63 V C57
2020-02-27 10:14:21 s 1 -155185.89 1 +369552.99 2700.0 C57
2020-02-27 11:44:21 S 12 02 43.795 +51 36 29.95 V C57
2020-02-27 11:44:21 s 1 -157876.06 2 +367406.09 880.0 C57
2020-02-27 12:14:21 S 12 02 37.466 +51 35 50.42 V C57
2020-02-27 12:14:21 s 1 -158766.69 9 +366675.50 7680.0 C57
2020-02-27 12:44:21 S 12 02 31.963 +51 35 25.04 V C57
2020-02-27 12:44:21 s 1 -159654.24 8 +365937.43 3150.0 C57
2020-02-27 14:44:21 S 12 02 07.495 +51 33 02.92 V C57
2020-02-27 14:44:21 s 1 -163173.05 9 +362910.25 1130.0 C57
2020-02-27 15:14:21 S 12 02 01.174 +51 32 26.30 V C57
2020-02-27 15:14:21 s 1 -164044.78 3 +362134.71 9520.0 C57
2020-02-27 15:15:45 C 12 00 28.24 +51 27 20.4 V T08
2020-02-27 15:21:45 C 12 00 27.08 +51 27 13.1 V T08
2020-02-27 15:29:45 C 12 00 25.51 +51 27 03.1 V T08
2020-02-27 15:37:53 C 12 00 23.97 +51 26 52.8 V T08
2020-02-27 18:14:21 S 12 01 25.846 +51 28 57.58 V C57
Radar Observations (7)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-10-15 01:30:00 103676.181 2 Hz 2380 -1 -1
2012-10-15 01:43:00 79585327.19 4 us 2380 -1 -1
2012-10-16 01:21:00 76431984.89 4 us 2380 -1 -1
2012-10-17 01:14:00 74366245.24 2 us 2380 -1 -1
2012-10-18 05:20:00 -4600.368 4 Hz 8560 -14 -14
2012-10-18 23:56:00 73851720.04 2 us 2380 -1 -1
2012-10-19 23:57:00 75404704.71 2 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)