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
2020-03-25 08:51:51 C 10 46 12.76 +36 12 46.4 V T08
2020-03-31 04:58:56 C 10 40 14.02 +33 03 43.1 U I41
2020-03-31 05:00:56 C 10 40 13.96 +33 03 40.6 U I41
2020-03-31 05:02:17 C 10 40 13.91 +33 03 38.9 U I41
2020-03-31 07:06:06 C 10 40 09.43 +33 00 57.4 U I41
2020-04-19 08:37:44 C 10 35 00.752 +24 15 41.64 U F52
2020-04-19 08:53:43 C 10 35 00.819 +24 15 25.53 U F52
2020-04-19 09:09:41 C 10 35 00.882 +24 15 09.64 U F52
2020-04-19 09:25:43 C 10 35 00.955 +24 14 53.37 U F52
2020-04-20 05:17:08 C 10 35 09.19 +23 55 05.2 V G96
2020-04-20 05:26:16 C 10 35 09.37 +23 54 55.7 V G96
2020-04-20 05:33:48 C 10 35 09.37 +23 54 48.1 V G96
2020-04-20 05:41:19 C 10 35 09.37 +23 54 40.6 V G96
2020-04-28 04:37:57 C 10 37 33.53 +20 55 12.1 V G96
2020-04-28 04:45:33 C 10 37 33.66 +20 55 05.3 V G96
2020-04-28 04:53:08 C 10 37 33.75 +20 54 58.5 V G96
2020-04-28 05:00:43 C 10 37 33.88 +20 54 51.9 V G96
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)