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
2020-01-24 13:07:29 C 15 02 05.56 +57 05 38.3 V T05
2020-01-24 13:15:03 C 15 02 04.09 +57 05 40.5 V T05
2020-01-24 13:29:36 C 15 02 01.35 +57 05 44.2 V T05
2020-01-24 13:30:16 C 15 02 01.25 +57 05 44.5 V T05
2020-01-24 13:34:39 C 15 02 00.42 +57 05 45.8 V T05
2020-01-24 13:42:58 C 15 01 58.83 +57 05 47.9 V T05
2020-01-24 13:57:20 C 15 01 56.13 +57 05 51.6 V T05
2020-01-25 11:02:14 C 14 57 59.23 +57 10 10.5 V 703
2020-01-25 11:09:56 C 14 57 57.72 +57 10 12.3 V 703
2020-01-25 11:17:38 C 14 57 56.12 +57 10 13.8 V 703
2020-01-25 11:25:21 C 14 57 54.74 +57 10 16.5 V 703
2020-01-28 10:29:08 C 14 44 02.76 +57 22 34.2 V 703
2020-01-28 10:36:59 C 14 44 01.11 +57 22 35.7 V 703
2020-01-28 10:44:49 C 14 43 59.47 +57 22 37.5 V 703
2020-01-28 10:52:39 C 14 43 57.91 +57 22 38.5 V 703
2020-01-28 15:37:12 C 14 42 59.78 +57 23 24.4 V T05
2020-01-28 15:42:30 C 14 42 58.63 +57 23 25.6 V T05
2020-01-28 15:55:35 C 14 42 55.90 +57 23 27.1 V T05
2020-01-28 16:04:33 C 14 42 54.06 +57 23 28.1 V T05
2020-01-30 14:30:26 C 14 33 19.47 +57 28 45.3 V T08
2020-01-30 14:36:16 C 14 33 18.16 +57 28 45.6 V T08
2020-01-30 14:44:43 C 14 33 16.31 +57 28 46.6 V T08
2020-01-30 14:59:08 C 14 33 13.16 +57 28 48.9 V T08
2020-01-31 10:25:51 C 14 29 06.05 +57 30 12.8 V 703
2020-01-31 10:33:34 C 14 29 04.41 +57 30 12.8 V 703
2020-01-31 10:41:18 C 14 29 02.74 +57 30 13.0 V 703
2020-01-31 10:49:02 C 14 29 00.97 +57 30 14.4 V 703
2020-02-03 09:25:05 C 14 13 31.29 +57 31 22.4 V 703
2020-02-03 09:32:16 C 14 13 29.60 +57 31 22.2 V 703
2020-02-03 09:39:26 C 14 13 27.97 +57 31 22.4 V 703
2020-02-03 09:46:36 C 14 13 26.37 +57 31 22.5 V 703
2020-02-03 12:41:17 C 14 12 47.18 +57 31 18.5 V T08
2020-02-03 12:49:59 C 14 12 45.20 +57 31 18.8 V T08
2020-02-03 12:54:10 C 14 12 44.19 +57 31 18.6 V T08
2020-02-03 13:13:38 C 14 12 39.65 +57 31 18.3 V T08
2020-02-04 11:19:51 C 14 07 38.09 +57 29 59.1 U I41
2020-02-04 11:51:07 C 14 07 30.69 +57 29 57.4 U I41
2020-02-04 13:09:02 C 14 07 12.27 +57 29 51.7 U I41
2020-02-04 13:44:57 C 14 07 03.79 +57 29 48.6 U I41
2020-02-05 09:08:05 C 14 02 38.01 +57 27 52.1 V G96
2020-02-05 09:15:33 C 14 02 36.24 +57 27 51.5 V G96
2020-02-05 09:23:02 C 14 02 34.48 +57 27 50.9 V G96
2020-02-05 09:30:30 C 14 02 32.70 +57 27 50.4 V G96
2020-02-07 10:52:35 C 13 50 59.00 +57 20 01.8 U I41
2020-02-07 10:55:12 C 13 50 58.36 +57 20 01.2 U I41
2020-02-07 12:21:06 C 13 50 37.39 +57 19 44.7 U I41
2020-02-07 12:22:25 C 13 50 37.08 +57 19 44.3 U I41
2020-02-07 12:39:38 C 13 50 32.86 +57 19 40.8 U I41
2020-02-07 12:42:14 C 13 50 32.22 +57 19 40.3 U I41
2020-02-12 09:20:19 C 13 22 32.46 +56 41 23.0 U I41
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)