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
2005-09-29 16:10:26 C 03 57 13.09 +01 16 08.2 r 379
2005-09-29 16:12:04 C 03 57 13.47 +01 16 18.0 r 379
2005-09-29 16:15:18 C 03 57 14.23 +01 16 37.8 r 379
2005-09-29 16:16:57 C 03 57 14.63 +01 16 48.1 r 379
2005-09-29 16:18:33 C 03 57 15.02 +01 16 58.0 r 379
2005-10-01 10:38:28 C 04 08 42.86 +06 01 32.4 r 703
2005-10-01 10:49:28 C 04 08 45.92 +06 02 52.9 r 703
2005-10-01 11:11:25 C 04 08 52.04 +06 05 33.1 r 703
2005-10-01 15:49:40 C 04 10 16.76 +06 39 40.2 r 379
2005-10-01 15:51:03 C 04 10 17.17 +06 39 50.6 r 379
2005-10-01 15:52:25 C 04 10 17.54 +06 40 00.5 r 379
2005-10-01 15:55:10 C 04 10 18.33 +06 40 21.2 r 379
2005-10-01 15:56:33 C 04 10 18.73 +06 40 31.5 r 379
2005-10-01 15:57:55 C 04 10 19.14 +06 40 41.7 r 379
2005-10-03 01:25:34 C 04 21 00.31 +11 05 18.8 o A32
2005-10-03 01:27:12 C 04 21 00.83 +11 05 32.3 o A32
2005-10-03 01:28:49 C 04 21 01.36 +11 05 45.8 o A32
2005-10-03 01:30:25 C 04 21 01.92 +11 05 59.6 o A32
2005-10-03 01:32:01 C 04 21 02.44 +11 06 12.9 o A32
2005-10-03 09:53:44 C 04 23 57.23 +12 17 47.7 r 683
2005-10-03 10:13:31 C 04 24 03.95 +12 20 39.4 r 683
2005-10-03 23:36:43 C 04 28 58.28 +14 18 36.3 o A32
2005-10-03 23:38:21 C 04 28 58.86 +14 18 50.7 o A32
2005-10-03 23:39:58 C 04 28 59.45 +14 19 05.2 o A32
2005-10-03 23:41:34 C 04 29 00.05 +14 19 20.1 o A32
2005-10-03 23:43:11 C 04 29 00.65 +14 19 34.6 o A32
2005-10-05 07:33:29 C 04 41 51.21 +19 21 09.6 15.7 c 704
2005-10-05 07:49:09 C 04 41 57.82 +19 23 45.3 16.0 c 704
2005-10-05 08:04:49 C 04 42 04.40 +19 26 21.1 16.0 c 704
2005-10-06 23:19:26 C 05 00 41.43 +26 10 10.6 o A32
2005-10-06 23:21:40 C 05 00 42.58 +26 10 34.5 o A32
2005-10-06 23:23:54 C 05 00 43.71 +26 10 58.3 o A32
2005-10-06 23:26:08 C 05 00 44.85 +26 11 22.1 o A32
2005-10-06 23:28:22 C 05 00 45.99 +26 11 46.0 o A32
2005-10-07 08:39:34 C 05 05 38.76 +27 50 36.9 15.7 c 704
2005-10-07 08:55:30 C 05 05 47.15 +27 53 29.6 15.8 c 704
2005-10-07 09:11:26 C 05 05 55.55 +27 56 22.3 15.9 c 704
2005-10-08 08:44:00 C 05 19 29.50 +32 11 49.1 15.1 c 704
2005-10-08 08:59:47 C 05 19 38.82 +32 14 42.3 15.2 c 704
2005-10-08 09:15:31 C 05 19 48.18 +32 17 34.6 16.0 c 704
2005-10-08 09:31:18 C 05 19 57.52 +32 20 28.3 15.5 c 704
2005-10-08 09:47:04 C 05 20 06.86 +32 23 20.9 15.4 c 704
2005-10-09 00:22:25 C 05 29 22.46 +35 01 32.8 o A32
2005-10-09 00:23:55 C 05 29 23.44 +35 01 49.5 o A32
2005-10-09 00:25:24 C 05 29 24.42 +35 02 05.7 o A32
2005-10-09 00:28:24 C 05 29 26.35 +35 02 38.5 o A32
2005-10-09 00:29:53 C 05 29 27.32 +35 02 54.9 o A32
2005-10-11 00:14:34 C 06 04 37.36 +43 23 26.7 o A32
2005-10-11 00:18:20 C 06 04 40.44 +43 24 04.7 o A32
2005-10-11 00:22:48 C 06 04 44.07 +43 24 49.5 o A32
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)