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
2013-01-20 12:00:34 C 14 26 24.32 +43 53 58.2 t 290
2013-01-20 12:03:33 C 14 26 24.07 +43 53 58.2 t 290
2013-01-20 12:06:33 C 14 26 23.83 +43 53 58.2 t 290
2013-02-01 14:55:58 C 13 58 01.796 +43 56 49.69 L F51
2013-02-01 15:12:18 C 13 57 59.781 +43 56 49.53 L F51
2013-02-01 15:28:47 C 13 57 57.740 +43 56 49.29 L F51
2013-02-10 03:14:02 C 13 31 14.07 +43 42 22.5 c A24
2013-02-10 03:33:04 C 13 31 11.28 +43 42 19.8 c A24
2013-02-10 03:55:23 C 13 31 08.06 +43 42 16.4 c A24
2013-02-11 12:44:48 C 13 26 20.92 +43 36 51.7 q 448
2013-02-11 12:53:04 C 13 26 19.67 +43 36 50.3 q 448
2013-02-11 13:00:17 C 13 26 18.58 +43 36 48.9 q 448
2013-02-23 10:42:56 C 12 41 47.05 +41 53 24.4 u H21
2013-02-23 10:48:07 C 12 41 46.22 +41 53 21.4 u H21
2013-02-23 10:53:27 C 12 41 45.35 +41 53 18.6 u H21
2013-02-23 10:58:48 C 12 41 44.49 +41 53 15.5 u H21
2013-02-24 08:01:51 C 12 38 25.40 +41 41 14.7 q H21
2013-02-24 08:08:52 C 12 38 24.27 +41 41 10.4 q H21
2013-02-24 08:15:53 C 12 38 23.12 +41 41 06.6 q H21
2013-02-24 08:22:52 C 12 38 21.99 +41 41 02.6 q H21
2013-02-25 07:38:26 C 12 34 42.57 +41 27 00.4 u H21
2013-02-25 07:43:37 C 12 34 41.75 +41 26 57.1 u H21
2013-02-25 07:48:37 C 12 34 40.91 +41 26 54.0 u H21
2013-02-25 07:53:38 C 12 34 40.10 +41 26 50.8 u H21
2013-02-25 07:59:17 C 12 34 39.21 +41 26 47.4 u H21
2013-03-13 05:51:44 C 11 41 26.26 +36 05 32.4 q 448
2013-03-13 06:01:12 C 11 41 25.18 +36 05 22.9 q 448
2013-03-13 06:11:53 C 11 41 23.87 +36 05 12.1 q 448
2013-03-13 06:20:41 C 11 41 22.88 +36 05 03.3 q 448
2013-03-14 08:53:57 C 11 38 21.94 +35 38 04.5 u 703
2013-03-14 09:02:44 C 11 38 21.04 +35 37 55.7 u 703
2013-03-14 09:11:38 C 11 38 20.00 +35 37 47.2 u 703
2013-03-14 09:20:32 C 11 38 18.96 +35 37 38.1 u 703
2013-03-14 09:29:26 C 11 38 17.95 +35 37 28.1 u 703
2013-03-29 03:59:24 C 11 08 21.82 +29 23 16.0 u H21
2013-03-29 04:07:26 C 11 08 21.31 +29 23 07.8 u H21
2013-04-04 04:20:48 C 11 01 06.20 +26 55 07.0 u 703
2013-04-04 04:28:05 C 11 01 05.91 +26 54 59.1 u 703
2013-04-04 04:35:17 C 11 01 05.73 +26 54 51.9 u 703
2013-04-04 04:42:33 C 11 01 05.34 +26 54 44.6 u 703
2019-08-24 15:37:22 C 00 41 58.24 -43 55 47.6 q E89
2019-08-24 16:08:40 C 00 41 57.30 -43 56 02.5 q E89
2019-08-27 14:50:38 C 00 39 52.66 -44 32 25.7 q E89
2019-08-27 15:21:31 C 00 39 51.42 -44 32 41.0 q E89
2019-09-11 14:11:13 C 00 14 59.63 -47 01 21.6 q E89
2019-09-11 14:42:03 C 00 14 56.16 -47 01 28.2 q E89
2019-09-20 13:12:26 C 23 45 56.61 -47 09 41.7 q E89
2019-09-20 13:38:49 C 23 45 52.16 -47 09 35.3 q E89
2019-09-24 04:08:26 C 23 30 55.24 -46 38 28.7 q X74
2019-09-24 04:22:13 C 23 30 52.64 -46 38 21.2 q X74
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)