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
2020-03-02 19:14:20 S 11 42 43.536 +49 24 23.90 V C57
2020-03-02 19:14:20 s 1 -207493.16 3 +45771.785 5480.0 C57
2020-03-04 06:12:19 C 11 36 58.21 +48 29 54.0 U I41
2020-03-04 06:40:16 C 11 36 53.70 +48 29 15.8 U I41
2020-03-04 06:41:35 C 11 36 53.49 +48 29 14.1 U I41
2020-03-04 10:17:56 C 11 36 18.48 +48 24 12.5 U I41
2020-03-06 11:20:02 C 11 28 57.43 +47 14 51.4 V T08
2020-03-06 11:24:40 C 11 28 56.74 +47 14 44.7 V T08
2020-03-06 11:33:30 C 11 28 55.43 +47 14 31.5 V T08
2020-03-06 11:52:07 C 11 28 52.59 +47 14 04.8 V T08
2020-03-07 05:25:52 C 11 26 24.48 +46 48 41.7 U I41
2020-03-07 05:44:39 C 11 26 21.82 +46 48 14.9 U I41
2020-03-07 05:45:57 C 11 26 21.63 +46 48 13.0 U I41
2020-03-07 09:17:15 C 11 25 51.29 +46 43 08.7 U I41
2020-03-10 04:14:20 S 11 18 25.150 +45 06 33.01 V C57
2020-03-11 01:14:20 S 11 15 51.768 +44 36 53.35 V C57
2020-03-11 01:14:20 s 1 -44645.915 0 +399819.86 8360.0 C57
2020-03-11 03:14:20 S 11 15 36.991 +44 33 54.54 V C57
2020-03-11 03:14:20 s 1 -49095.414 0 +399836.73 2880.0 C57
2020-03-11 05:44:20 S 11 15 19.615 +44 30 22.90 V C57
2020-03-11 05:44:20 s 1 -54633.999 0 +399678.76 4930.0 C57
2020-03-11 13:44:20 S 11 14 22.610 +44 19 04.80 V C57
2020-03-11 13:44:20 s 1 -72154.459 0 +397846.60 8400.0 C57
2020-03-11 23:14:20 S 11 13 15.226 +44 05 35.16 V C57
2020-03-11 23:14:20 s 1 -92466.176 0 +393070.80 5410.0 C57
2020-03-12 11:14:20 S 11 11 51.631 +43 48 15.98 V C57
2020-03-12 11:14:20 s 1 -117142.32 0 +383040.20 5460.0 C57
2020-03-12 14:14:20 S 11 11 30.079 +43 43 59.12 V C57
2020-03-12 14:14:20 s 1 -123108.02 2 +379837.50 4410.0 C57
2020-03-12 14:44:20 S 11 11 26.611 +43 43 17.72 V C57
2020-03-12 14:44:20 s 1 -124093.56 9 +379276.69 5000.0 C57
2020-03-12 15:44:20 S 11 11 19.814 +43 41 51.18 V C57
2020-03-12 15:44:20 s 1 -126056.95 9 +378131.88 3720.0 C57
2020-03-12 21:14:20 S 11 10 42.086 +43 34 02.03 V C57
2020-03-12 21:14:20 s 1 -136663.88 9 +371282.43 9000.0 C57
2020-03-15 06:44:01 C 11 03 50.34 +42 03 16.2 V 703
2020-03-15 06:52:10 C 11 03 49.48 +42 03 03.1 V 703
2020-03-15 07:00:25 C 11 03 48.73 +42 02 51.3 V 703
2020-03-15 07:08:43 C 11 03 47.82 +42 02 39.5 V 703
2020-03-16 22:20:53 C 11 00 13.22 +41 04 30.5 V 130
2020-03-16 22:25:05 C 11 00 12.84 +41 04 24.8 V 130
2020-03-16 22:29:17 C 11 00 12.44 +41 04 18.4 V 130
2020-03-24 06:42:09 C 10 47 38.03 +36 49 21.1 V 703
2020-03-24 06:49:45 C 10 47 37.63 +36 49 10.3 V 703
2020-03-24 06:57:20 C 10 47 37.24 +36 48 59.4 V 703
2020-03-24 08:47:34 C 10 47 31.234 +36 46 26.95 U F52
2020-03-24 09:04:36 C 10 47 30.217 +36 46 03.07 U F52
2020-03-25 08:10:58 C 10 46 15.06 +36 13 43.1 V T08
2020-03-25 08:15:06 C 10 46 14.83 +36 13 37.8 V T08
2020-03-25 08:36:03 C 10 46 13.65 +36 13 09.0 V T08
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)