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
2020-03-01 23:44:21 S 11 46 22.838 +49 51 36.68 V C57
2020-03-01 23:44:21 s 1 -233335.97 3 +134022.45 6170.0 C57
2020-03-02 00:14:20 S 11 46 17.316 +49 50 52.58 V C57
2020-03-02 00:14:20 s 1 -233027.06 1 +131919.59 4450.0 C57
2020-03-02 00:44:20 S 11 46 11.285 +49 50 24.76 V C57
2020-03-02 00:44:20 s 1 -232702.66 3 +129807.90 9070.0 C57
2020-03-02 02:14:20 S 11 45 54.346 +49 48 15.66 V C57
2020-03-02 02:14:20 s 1 -231634.46 0 +123419.89 8790.0 C57
2020-03-02 02:44:21 S 11 45 48.206 +49 47 35.30 V C57
2020-03-02 02:44:21 s 1 -231245.99 8 +121272.98 6550.0 C57
2020-03-02 03:14:20 S 11 45 42.391 +49 46 50.99 V C57
2020-03-02 03:14:20 s 1 -230840.96 7 +119117.31 9520.0 C57
2020-03-02 03:44:20 S 11 45 37.426 +49 46 16.86 V C57
2020-03-02 03:44:20 s 1 -230419.13 6 +116952.90 7450.0 C57
2020-03-02 04:14:21 S 11 45 31.819 +49 45 21.38 V C57
2020-03-02 04:14:21 s 1 -229980.27 0 +114779.78 90.0 C57
2020-03-02 04:44:20 S 11 45 25.291 +49 44 44.16 V C57
2020-03-02 04:44:20 s 1 -229524.12 9 +112597.97 7190.0 C57
2020-03-02 06:44:20 S 11 45 03.408 +49 42 04.64 V C57
2020-03-02 06:44:20 s 1 -227521.84 1 +103784.46 4900.0 C57
2020-03-02 07:14:21 S 11 44 57.007 +49 41 15.79 V C57
2020-03-02 07:14:21 s 1 -226975.54 7 +101559.69 290.0 C57
2020-03-02 07:44:20 S 11 44 52.565 +49 40 43.61 V C57
2020-03-02 07:44:20 s 1 -226410.42 9 +99326.437 8480.0 C57
2020-03-02 08:14:20 S 11 44 46.735 +49 39 56.38 V C57
2020-03-02 08:14:20 s 1 -225826.21 0 +97084.742 9180.0 C57
2020-03-02 09:44:20 S 11 44 30.305 +49 38 02.40 V C57
2020-03-02 09:44:20 s 1 -223956.07 3 +90309.516 3280.0 C57
2020-03-02 10:43:07 C 11 44 02.66 +49 29 34.8 V T08
2020-03-02 10:44:20 S 11 44 18.598 +49 36 31.93 V C57
2020-03-02 10:44:20 s 1 -222608.43 8 +85751.464 9440.0 C57
2020-03-02 10:47:45 C 11 44 01.86 +49 29 28.5 V T08
2020-03-02 10:59:43 C 11 43 59.79 +49 29 12.5 V T08
2020-03-02 11:14:55 C 11 43 57.11 +49 28 52.0 V T08
2020-03-02 11:44:21 S 11 44 06.958 +49 35 08.41 V C57
2020-03-02 11:44:21 s 1 -221177.19 6 +81161.004 7880.0 C57
2020-03-02 12:14:20 S 11 44 02.638 +49 34 30.79 V C57
2020-03-02 12:14:20 s 1 -220429.41 0 +78853.799 7070.0 C57
2020-03-02 13:14:21 S 11 43 51.319 +49 33 05.54 V C57
2020-03-02 13:14:21 s 1 -218867.81 7 +74215.834 3520.0 C57
2020-03-02 13:44:20 S 11 43 45.377 +49 32 14.53 V C57
2020-03-02 13:44:20 s 1 -218053.31 2 +71885.246 20.0 C57
2020-03-02 14:14:20 S 11 43 40.219 +49 31 24.82 V C57
2020-03-02 14:14:20 s 1 -217215.85 4 +69547.045 4840.0 C57
2020-03-02 14:44:21 S 11 43 33.607 +49 30 50.98 V C57
2020-03-02 14:44:21 s 1 -216355.07 4 +67201.333 7570.0 C57
2020-03-02 17:44:21 S 11 43 00.869 +49 26 31.34 V C57
2020-03-02 17:44:21 s 1 -210678.82 9 +52975.752 5950.0 C57
2020-03-02 18:44:20 S 11 42 50.177 +49 25 06.60 V C57
2020-03-02 18:44:20 s 1 -208581.96 1 +48179.451 1740.0 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)