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
2012-10-09 05:57:59 C 00 10 41.44 -19 54 32.1 r 703
2012-10-10 20:09:04 C 23 55 58.29 -15 40 01.2 13.8 c 583
2012-10-10 20:09:35 C 23 55 58.07 -15 39 57.6 14.1 c 583
2012-10-10 20:10:14 C 23 55 57.78 -15 39 52.7 13.9 c 583
2012-10-10 20:12:33 C 23 55 56.78 -15 39 35.3 13.7 c 583
2012-10-10 20:13:04 C 23 55 56.57 -15 39 31.5 13.8 c 583
2012-10-10 20:13:43 C 23 55 56.26 -15 39 26.6 13.7 c 583
2012-10-10 20:37:50 C 23 55 45.66 -15 36 26.5 u 089
2012-10-10 20:38:59 C 23 55 45.17 -15 36 17.9 u 089
2012-10-10 20:40:08 C 23 55 44.68 -15 36 09.4 u 089
2012-10-10 20:41:17 C 23 55 44.18 -15 36 01.0 u 089
2012-10-10 20:42:26 C 23 55 43.67 -15 35 52.3 u 089
2012-10-10 20:43:35 C 23 55 43.16 -15 35 43.5 u 089
2012-10-10 20:44:44 C 23 55 42.67 -15 35 34.9 u 089
2012-10-10 20:45:53 C 23 55 42.18 -15 35 26.3 u 089
2012-10-10 20:47:02 C 23 55 41.66 -15 35 17.3 u 089
2012-10-10 20:48:11 C 23 55 41.17 -15 35 09.0 u 089
2012-10-13 17:46:43 C 23 22 21.57 -04 54 14.9 o 071
2012-10-13 17:47:25 C 23 22 21.15 -04 54 06.7 o 071
2012-10-13 17:47:56 C 23 22 20.85 -04 54 01.0 o 071
2012-10-13 17:48:27 C 23 22 20.55 -04 53 55.2 o 071
2012-10-13 17:48:59 C 23 22 20.25 -04 53 49.2 o 071
2012-10-13 17:49:31 C 23 22 19.96 -04 53 43.6 o 071
2012-10-13 17:50:02 C 23 22 19.66 -04 53 37.7 o 071
2012-10-13 17:50:34 C 23 22 19.34 -04 53 31.6 o 071
2012-10-13 17:51:06 C 23 22 19.04 -04 53 25.7 o 071
2012-10-13 17:51:38 C 23 22 18.74 -04 53 20.0 o 071
2012-10-13 17:52:09 C 23 22 18.43 -04 53 14.1 o 071
2012-10-13 17:52:41 C 23 22 18.13 -04 53 08.1 o 071
2012-10-13 17:53:13 C 23 22 17.82 -04 53 02.1 o 071
2012-10-13 17:53:45 C 23 22 17.52 -04 52 56.2 o 071
2012-10-13 17:54:16 C 23 22 17.21 -04 52 50.4 o 071
2012-10-13 17:54:48 C 23 22 16.92 -04 52 44.6 o 071
2012-10-13 17:55:20 C 23 22 16.61 -04 52 38.4 o 071
2012-10-13 17:55:51 C 23 22 16.31 -04 52 32.8 o 071
2012-10-13 17:56:23 C 23 22 16.01 -04 52 26.8 o 071
2012-10-13 17:56:54 C 23 22 15.71 -04 52 21.0 o 071
2012-10-13 17:57:25 C 23 22 15.41 -04 52 15.4 o 071
2012-10-13 17:58:04 C 23 22 15.04 -04 52 07.9 o 071
2012-10-13 21:16:06 C 23 20 21.97 -04 15 03.5 q J84
2012-10-13 21:19:06 C 23 20 20.22 -04 14 29.6 q J84
2012-10-13 21:22:05 C 23 20 18.47 -04 13 55.6 q J84
2012-10-13 21:25:04 C 23 20 16.73 -04 13 21.6 q J84
2012-10-13 21:28:03 C 23 20 14.98 -04 12 47.4 q J84
2012-10-13 21:31:03 C 23 20 13.24 -04 12 13.4 q J84
2012-10-14 18:53:46 C 23 07 39.96 +00 04 08.4 u J93
2012-10-14 18:58:32 C 23 07 36.94 +00 05 08.3 u J93
2012-10-14 19:03:18 C 23 07 33.91 +00 06 08.2 u J93
2012-10-15 03:36:56 C 23 02 11.38 +01 56 10.1 14.9 c 704
2012-10-15 03:56:32 C 23 01 58.39 +02 00 25.4 14.7 c 704
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)