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
2020-02-29 10:44:21 S 11 53 28.279 +50 40 05.77 V C57
2020-02-29 10:44:21 s 1 -223889.45 7 +265275.63 5140.0 C57
2020-02-29 11:14:21 S 11 53 21.358 +50 39 28.08 V C57
2020-02-29 11:14:21 s 1 -224341.19 6 +263813.59 2360.0 C57
2020-02-29 12:44:21 S 11 53 03.888 +50 37 29.93 V C57
2020-02-29 12:44:21 s 1 -225654.98 9 +259377.96 3900.0 C57
2020-02-29 13:14:21 S 11 52 58.555 +50 36 53.82 V C57
2020-02-29 13:14:21 s 1 -226078.89 5 +257882.88 840.0 C57
2020-02-29 13:44:21 S 11 52 53.254 +50 36 21.56 V C57
2020-02-29 13:44:21 s 1 -226495.67 8 +256379.50 2540.0 C57
2020-02-29 14:44:21 S 11 52 40.642 +50 35 00.49 V C57
2020-02-29 14:44:21 s 1 -227307.60 2 +253347.82 9990.0 C57
2020-02-29 15:14:21 S 11 52 35.510 +50 34 22.04 V C57
2020-02-29 15:14:21 s 1 -227702.60 6 +251819.49 5610.0 C57
2020-02-29 15:44:21 S 11 52 29.256 +50 33 40.00 V C57
2020-02-29 15:44:21 s 1 -228090.21 1 +250282.82 5720.0 C57
2020-02-29 16:14:21 S 11 52 23.950 +50 33 01.44 V C57
2020-02-29 16:14:21 s 1 -228470.34 6 +248737.79 270.0 C57
2020-02-29 17:14:21 S 11 52 12.672 +50 31 50.99 V C57
2020-02-29 17:14:21 s 1 -229207.91 4 +245622.61 2370.0 C57
2020-02-29 17:44:21 S 11 52 05.916 +50 31 02.32 V C57
2020-02-29 17:44:21 s 1 -229565.20 0 +244052.43 9790.0 C57
2020-02-29 18:14:21 S 11 52 00.108 +50 30 28.55 V C57
2020-02-29 18:14:21 s 1 -229914.72 1 +242473.84 1350.0 C57
2020-02-29 19:14:21 S 11 51 48.370 +50 29 14.42 V C57
2020-02-29 19:14:21 s 1 -230590.16 1 +239291.39 6600.0 C57
2020-02-29 19:44:21 S 11 51 42.382 +50 28 32.45 V C57
2020-02-29 19:44:21 s 1 -230915.92 4 +237687.50 140.0 C57
2020-02-29 20:14:21 S 11 51 36.982 +50 27 55.76 V C57
2020-02-29 20:14:21 s 1 -231233.61 1 +236075.14 7520.0 C57
2020-02-29 21:14:21 S 11 51 26.407 +50 26 48.08 V C57
2020-02-29 21:14:21 s 1 -231844.43 0 +232825.00 3490.0 C57
2020-03-01 00:14:21 S 11 50 51.298 +50 22 50.74 V C57
2020-03-01 00:14:21 s 1 -233474.42 1 +222870.13 5110.0 C57
2020-03-01 00:44:21 S 11 50 44.328 +50 21 59.83 V C57
2020-03-01 00:44:21 s 1 -233715.64 7 +221181.04 3350.0 C57
2020-03-01 01:14:21 S 11 50 38.995 +50 21 24.44 V C57
2020-03-01 01:14:21 s 1 -233947.93 6 +219483.35 4590.0 C57
2020-03-01 01:44:21 S 11 50 33.566 +50 20 52.48 V C57
2020-03-01 01:44:21 s 1 -234171.19 5 +217777.06 8730.0 C57
2020-03-01 02:14:21 S 11 50 28.003 +50 20 07.33 V C57
2020-03-01 02:14:21 s 1 -234385.32 8 +216062.16 5690.0 C57
2020-03-01 02:44:21 S 11 50 21.994 +50 19 28.09 V C57
2020-03-01 02:44:21 s 1 -234590.24 1 +214338.62 5350.0 C57
2020-03-01 04:14:21 S 11 50 04.570 +50 17 42.76 V C57
2020-03-01 04:14:21 s 1 -235148.67 2 +209116.10 9670.0 C57
2020-03-01 05:14:41 C 11 49 07.80 +50 08 38.5 U I41
2020-03-01 05:44:21 S 11 49 47.424 +50 15 34.67 V C57
2020-03-01 05:44:21 s 1 -235620.51 6 +203815.48 4850.0 C57
2020-03-01 06:27:12 C 11 48 54.82 +50 07 05.4 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)