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
2005-10-11 00:25:04 C 06 04 45.86 +43 25 11.7 o A32
2005-10-11 00:27:18 C 06 04 47.68 +43 25 34.2 o A32
2005-10-11 01:07:43 C 06 05 19.08 +43 32 17.8 r 084
2005-10-11 01:08:52 C 06 05 19.98 +43 32 28.9 r 084
2005-10-11 01:10:00 C 06 05 20.92 +43 32 40.6 r 084
2005-10-11 01:11:09 C 06 05 21.84 +43 32 51.8 r 084
2005-10-11 21:23:04 C 06 22 46.98 +46 45 41.4 r 084
2005-10-11 21:24:12 C 06 22 47.98 +46 45 51.6 r 084
2005-10-11 21:25:21 C 06 22 49.01 +46 46 02.4 r 084
2005-10-11 21:26:29 C 06 22 50.02 +46 46 12.9 r 084
2005-10-12 16:26:00 C 06 40 33.95 +49 33 42.9 o 379
2005-10-12 16:27:14 C 06 40 35.08 +49 33 53.8 o 379
2005-10-12 16:28:25 C 06 40 36.21 +49 34 04.0 o 379
2005-10-12 16:30:50 C 06 40 38.54 +49 34 24.2 o 379
2005-10-12 16:32:04 C 06 40 39.70 +49 34 34.7 o 379
2005-10-12 16:33:16 C 06 40 40.84 +49 34 44.8 o 379
2005-10-12 23:42:56 C 06 47 41.14 +50 32 56.2 o A32
2005-10-12 23:45:10 C 06 47 43.33 +50 33 14.3 o A32
2005-10-12 23:47:24 C 06 47 45.56 +50 33 32.5 o A32
2005-10-12 23:49:37 C 06 47 47.75 +50 33 50.9 o A32
2005-10-12 23:51:51 C 06 47 49.98 +50 34 08.8 o A32
2005-10-13 09:38:33 C 06 57 42.32 +51 50 38.2 o 699
2005-10-13 10:10:13 C 06 58 14.23 +51 54 40.3 o 699
2005-10-13 10:41:57 C 06 58 46.16 +51 58 41.6 o 699
2005-10-16 03:08:28 C 08 10 06.18 +58 08 34.7 o A32
2005-10-16 03:09:35 C 08 10 07.47 +58 08 39.1 o A32
2005-10-16 03:10:41 C 08 10 08.77 +58 08 43.5 o A32
2005-10-16 03:12:55 C 08 10 11.25 +58 08 52.8 o A32
2005-10-16 03:15:08 C 08 10 13.80 +58 09 01.8 o A32
2005-10-18 16:29:26 C 09 19 33.45 +60 42 44.2 o 084
2005-10-18 16:31:05 C 09 19 35.10 +60 42 46.0 o 084
2005-10-18 16:32:45 C 09 19 37.09 +60 42 48.2 o 084
2005-10-18 16:34:24 C 09 19 38.84 +60 42 50.5 o 084
2005-10-18 23:48:34 C 09 27 28.28 +60 50 54.9 o A32
2005-10-18 23:49:55 C 09 27 29.60 +60 50 56.6 o A32
2005-10-19 00:03:09 C 09 27 43.76 +60 51 10.5 o A32
2005-10-19 00:05:43 C 09 27 46.52 +60 51 14.3 o A32
2005-10-19 00:09:33 C 09 27 50.54 +60 51 17.6 o A32
2005-10-20 16:23:31 C 10 07 38.63 +61 03 51.7 o 084
2005-10-20 16:25:09 C 10 07 40.15 +61 03 51.8 o 084
2005-10-20 16:26:49 C 10 07 41.66 +61 03 51.2 o 084
2005-10-20 16:28:28 C 10 07 43.28 +61 03 50.3 o 084
2005-10-22 11:32:23 C 10 44 04.67 +60 37 19.5 16.9 c 704
2005-10-22 11:49:33 C 10 44 17.56 +60 37 05.1 17.2 c 704
2005-10-22 12:06:41 C 10 44 30.41 +60 36 50.3 17.2 c 704
2005-10-26 23:34:04 C 11 48 18.86 +58 05 56.6 o A32
2005-10-26 23:36:29 C 11 48 20.00 +58 05 52.9 o A32
2005-10-26 23:40:31 C 11 48 21.89 +58 05 46.5 o A32
2005-10-26 23:47:48 C 11 48 25.28 +58 05 34.8 o A32
2005-10-28 03:25:06 C 12 00 09.35 +57 21 10.9 o 084
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)