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
2012-10-15 04:16:11 C 23 01 45.36 +02 04 41.9 14.8 c 704
2012-10-15 04:35:51 C 23 01 32.27 +02 08 59.1 14.8 c 704
2012-10-15 04:55:27 C 23 01 19.24 +02 13 15.5 14.8 c 704
2012-10-16 03:58:02 C 22 45 57.39 +07 26 44.0 14.6 c 704
2012-10-16 04:17:35 C 22 45 43.23 +07 31 19.2 14.6 c 704
2012-10-16 04:37:15 C 22 45 28.96 +07 35 56.1 14.6 c 704
2012-10-16 04:56:48 C 22 45 14.75 +07 40 31.5 14.6 c 704
2012-10-16 05:16:32 C 22 45 00.41 +07 45 09.7 14.5 c 704
2012-10-16 21:13:19 C 22 33 32.60 +11 33 31.7 u 510
2012-10-16 21:19:46 C 22 33 27.70 +11 35 05.3 u 510
2012-10-16 21:26:14 C 22 33 22.77 +11 36 39.1 u 510
2012-10-16 21:39:08 C 22 33 12.95 +11 39 46.9 u 510
2012-10-16 21:45:36 C 22 33 08.03 +11 41 20.7 u 510
2012-10-16 21:52:03 C 22 33 03.10 +11 42 54.6 u 510
2012-10-17 03:23:42 C 22 28 57.90 +13 04 12.8 14.6 c 704
2012-10-17 03:24:27 C 22 28 57.35 +13 04 24.3 14.8 c 704
2012-10-17 03:43:26 C 22 28 42.40 +13 09 02.1 14.5 c 704
2012-10-17 03:44:11 C 22 28 41.87 +13 09 12.6 15.2 c 704
2012-10-17 04:03:37 C 22 28 26.53 +13 13 58.6 14.5 c 704
2012-10-17 04:04:22 C 22 28 25.95 +13 14 09.6 14.6 c 704
2012-10-17 04:24:34 C 22 28 10.09 +13 19 05.3 14.3 c 704
2012-10-17 04:25:19 C 22 28 09.47 +13 19 16.8 14.5 c 704
2012-10-17 04:44:18 C 22 27 54.55 +13 23 55.1 14.4 c 704
2012-10-17 04:45:04 C 22 27 53.94 +13 24 06.0 14.7 c 704
2012-10-18 01:42:56 C 22 11 32.91 +18 33 01.3 14.4 c 704
2012-10-18 02:04:43 C 22 11 14.60 +18 38 24.0 15.4 c 704
2012-10-18 02:25:22 C 22 10 57.38 +18 43 27.7 14.5 c 704
2012-10-18 02:46:11 C 22 10 39.87 +18 48 34.7 14.3 c 704
2012-10-18 03:06:33 C 22 10 22.75 +18 53 34.8 14.3 c 704
2012-10-18 19:22:41 C 21 56 51.36 +22 49 58.6 o 639
2012-10-18 19:24:24 C 21 56 49.80 +22 50 23.5 o 639
2012-10-18 19:26:21 C 21 56 48.12 +22 50 51.0 o 639
2012-10-18 19:26:44 C 21 56 48.41 +22 50 55.0 u G33
2012-10-18 19:32:38 C 21 56 43.15 +22 52 20.3 u G33
2012-10-18 19:32:46 C 21 56 42.51 +22 52 23.9 o 639
2012-10-18 21:47:50 C 21 54 43.19 +23 24 34.3 14.4 c 583
2012-10-18 21:48:08 C 21 54 42.94 +23 24 38.6 14.3 c 583
2012-10-18 21:48:33 C 21 54 42.58 +23 24 44.5 14.6 c 583
2012-10-18 21:52:37 C 21 54 39.04 +23 25 42.5 14.4 c 583
2012-10-18 21:52:56 C 21 54 38.75 +23 25 46.9 14.4 c 583
2012-10-18 21:53:21 C 21 54 38.40 +23 25 52.5 14.6 c 583
2012-10-18 21:57:34 C 21 54 34.75 +23 26 52.2 14.4 c 583
2012-10-18 21:57:53 C 21 54 34.47 +23 26 57.0 14.4 c 583
2012-10-18 21:58:16 C 21 54 34.11 +23 27 02.5 14.3 c 583
2012-10-20 18:54:45 C 21 14 28.08 +33 24 54.9 t 130
2012-10-20 18:55:40 C 21 14 27.21 +33 25 06.0 t 130
2012-10-20 18:56:34 C 21 14 26.36 +33 25 16.9 t 130
2012-10-20 18:57:47 C 21 14 25.19 +33 25 31.2 t 130
2012-10-20 19:18:12 C 21 14 05.45 +33 29 25.9 o 639
2012-10-20 19:22:14 C 21 14 01.63 +33 30 14.1 o 639
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)