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
2020-02-24 15:14:21 s 1 -16378.282 0 +396336.95 7400.0 C57
2020-02-24 15:44:21 S 12 16 32.086 +52 49 50.95 V C57
2020-02-24 15:44:21 s 1 -17488.415 0 +396653.91 5250.0 C57
2020-02-24 18:14:21 S 12 16 01.812 +52 47 13.09 V C57
2020-02-24 18:14:21 s 1 -23035.147 0 +398115.79 6840.0 C57
2020-02-24 18:44:21 S 12 15 55.058 +52 46 49.94 V C57
2020-02-24 18:44:21 s 1 -24143.556 0 +398383.69 3830.0 C57
2020-02-24 19:14:21 S 12 15 49.555 +52 46 19.67 V C57
2020-02-24 19:14:21 s 1 -25251.604 0 +398643.46 9100.0 C57
2020-02-24 19:44:21 S 12 15 42.082 +52 45 39.74 V C57
2020-02-24 19:44:21 s 1 -26359.268 0 +398895.12 2690.0 C57
2020-02-24 20:14:21 S 12 15 36.372 +52 45 17.35 V C57
2020-02-24 20:14:21 s 1 -27466.529 0 +399138.68 4620.0 C57
2020-02-24 22:14:21 S 12 15 11.306 +52 43 15.10 V C57
2020-02-24 22:14:21 s 1 -31891.115 0 +400032.23 6270.0 C57
2020-02-24 22:44:21 S 12 15 05.148 +52 42 37.84 V C57
2020-02-24 22:44:21 s 1 -32996.045 0 +400235.51 310.0 C57
2020-02-24 23:44:21 S 12 14 54.382 +52 41 41.42 V C57
2020-02-24 23:44:21 s 1 -35204.299 0 +400618.04 3900.0 C57
2020-02-25 01:14:21 S 12 14 35.242 +52 40 07.46 V C57
2020-02-25 01:14:21 s 1 -38512.364 0 +401131.92 8500.0 C57
2020-02-25 01:44:21 S 12 14 27.996 +52 39 39.56 V C57
2020-02-25 01:44:21 s 1 -39613.821 0 +401287.28 3920.0 C57
2020-02-25 02:14:21 S 12 14 21.727 +52 39 10.84 V C57
2020-02-25 02:14:21 s 1 -40714.628 0 +401434.71 8000.0 C57
2020-02-25 02:44:21 S 12 14 15.842 +52 38 35.70 V C57
2020-02-25 02:44:21 s 1 -41814.766 0 +401574.21 750.0 C57
2020-02-25 03:44:21 S 12 14 04.150 +52 37 38.03 V C57
2020-02-25 03:44:21 s 1 -44012.953 0 +401829.45 2400.0 C57
2020-02-25 04:44:21 S 12 13 52.070 +52 36 30.31 V C57
2020-02-25 04:44:21 s 1 -46208.224 0 +402053.11 9070.0 C57
2020-02-25 05:14:21 S 12 13 45.552 +52 35 57.95 V C57
2020-02-25 05:14:21 s 1 -47304.716 0 +402153.12 5600.0 C57
2020-02-25 08:14:21 S 12 13 09.218 +52 32 52.66 V C57
2020-02-25 08:14:21 s 1 -53866.427 0 +402588.44 1000.0 C57
2020-02-25 09:14:21 S 12 12 56.710 +52 31 50.70 V C57
2020-02-25 09:14:21 s 1 -56046.626 0 +402671.03 7650.0 C57
2020-02-25 10:11:25 C 12 10 57.68 +52 29 55.5 V 703
2020-02-25 10:19:08 C 12 10 56.13 +52 29 46.0 V 703
2020-02-25 10:26:49 C 12 10 54.46 +52 29 37.5 V 703
2020-02-25 10:34:27 C 12 10 52.86 +52 29 27.9 V 703
2020-02-25 13:14:21 S 12 12 07.534 +52 27 39.74 V C57
2020-02-25 13:14:21 s 1 -64728.091 0 +402690.82 6950.0 C57
2020-02-25 15:14:21 S 12 11 42.888 +52 25 28.78 V C57
2020-02-25 15:14:21 s 1 -69043.067 0 +402515.37 1800.0 C57
2020-02-25 15:44:21 S 12 11 37.486 +52 25 04.48 V C57
2020-02-25 15:44:21 s 1 -70118.920 0 +402452.29 8700.0 C57
2020-02-25 16:14:21 S 12 11 30.566 +52 24 29.81 V C57
2020-02-25 16:14:21 s 1 -71193.577 0 +402381.54 4910.0 C57
2020-02-25 18:44:21 S 12 11 00.034 +52 21 48.53 V C57
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)