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
2012-10-20 19:26:22 C 21 13 57.69 +33 31 03.8 o 639
2012-10-20 19:30:12 C 21 13 54.04 +33 31 49.5 o 639
2012-10-20 19:33:02 C 21 13 51.34 +33 32 23.4 o 639
2012-10-20 19:36:02 C 21 13 48.47 +33 32 59.2 o 639
2012-10-20 19:59:52 C 21 13 24.19 +33 37 50.7 u A92
2012-10-20 20:05:04 C 21 13 19.30 +33 38 52.2 u A92
2012-10-20 20:10:13 C 21 13 14.38 +33 39 53.5 u A92
2012-10-20 20:15:09 C 21 13 09.75 +33 40 51.9 u A92
2012-10-20 20:20:20 C 21 13 04.79 +33 41 52.6 u A92
2012-10-20 20:24:57 C 21 13 00.39 +33 42 47.5 u A92
2012-10-20 20:29:57 C 21 12 55.64 +33 43 46.6 u A92
2012-10-20 20:35:40 C 21 12 50.30 +33 44 53.9 u A92
2012-10-20 20:40:29 C 21 12 45.67 +33 45 50.6 u A92
2012-10-20 20:43:15 C 21 12 43.07 +33 46 23.2 u A92
2012-10-23 17:24:37 C 20 07 59.91 +44 41 32.5 u 089
2012-10-23 17:27:17 C 20 07 57.36 +44 41 51.4 u 089
2012-10-23 17:29:57 C 20 07 54.81 +44 42 10.3 u 089
2012-10-23 17:32:37 C 20 07 52.25 +44 42 29.1 u 089
2012-10-23 17:35:17 C 20 07 49.69 +44 42 48.0 u 089
2012-10-23 17:37:57 C 20 07 47.15 +44 43 06.7 u 089
2012-10-23 21:04:05 C 20 04 31.78 +45 06 54.8 u A92
2012-10-23 21:09:44 C 20 04 26.49 +45 07 33.2 u A92
2012-10-23 21:14:21 C 20 04 22.14 +45 08 04.6 u A92
2012-10-23 21:20:06 C 20 04 16.87 +45 08 41.1 u A92
2012-10-23 21:25:01 C 20 04 12.19 +45 09 16.5 u A92
2012-10-23 21:30:19 C 20 04 07.29 +45 09 50.9 u A92
2012-10-23 21:33:51 C 20 04 03.81 +45 10 15.5 u A92
2012-10-26 01:43:01 C 19 17 44.27 +49 53 35.6 15.8 c 704
2012-10-26 02:03:17 C 19 17 26.68 +49 54 57.0 16.7 c 704
2012-10-26 02:23:09 C 19 17 09.44 +49 56 15.0 15.9 c 704
2012-10-26 02:43:28 C 19 16 51.81 +49 57 34.2 15.9 c 704
2012-10-26 03:03:21 C 19 16 34.69 +49 58 51.8 15.9 c 704
2012-11-06 18:36:13 C 16 46 28.99 +54 40 18.0 c A24
2012-11-06 18:37:16 C 16 46 28.74 +54 40 17.5 c A24
2012-11-07 18:16:21 C 16 39 34.48 +54 33 45.2 c A24
2012-11-07 18:17:23 C 16 39 34.23 +54 33 44.9 c A24
2012-11-07 19:19:03 C 16 39 16.95 +54 33 19.4 c A24
2012-11-07 19:20:04 C 16 39 16.70 +54 33 18.9 c A24
2012-11-13 17:24:08 C 16 07 36.91 +53 34 27.4 t C01
2012-11-13 17:26:31 C 16 07 36.43 +53 34 25.6 t C01
2012-11-13 17:28:54 C 16 07 35.98 +53 34 23.6 t C01
2012-11-13 17:31:17 C 16 07 35.62 +53 34 23.0 t C01
2012-11-13 17:33:41 C 16 07 35.24 +53 34 21.4 t C01
2012-11-13 18:25:15 C 16 07 26.08 +53 33 52.7 t C01
2012-11-13 18:27:38 C 16 07 25.69 +53 33 51.7 t C01
2012-11-13 18:30:01 C 16 07 25.28 +53 33 50.2 t C01
2012-11-13 18:32:25 C 16 07 24.87 +53 33 49.7 t C01
2012-11-13 18:34:48 C 16 07 24.45 +53 33 47.3 t C01
2012-11-14 17:05:13 C 16 03 33.35 +53 22 49.2 t C01
2012-11-14 17:07:35 C 16 03 32.95 +53 22 47.4 t C01
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)