137170 (1999 HF1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4625092333 ± 7.37e-09
Semi-major axis (a)0.8191205796 AU ± 6.91e-11
Inclination (i)25.65676684° ± 6.33e-07
Long. of Asc. Node (Ω)155.84265542° ± 1.66e-06
Arg. of Perihelion (ω)253.41802715° ± 1.46e-06
Mean Anomaly (M)60.85489352° ± 1.85e-06
Mean Motion (n)1.3295066693°/day ± 1.68e-10
Perihelion dist (q)0.44026975 AU ± 6.04e-09
Aphelion dist (Q)1.19797141 AU ± 6.04e-09
Orbital Period0.74134738 yr ± 9.38e-11
Physical Parameters
H (abs. magnitude)14.66
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.179″
Uncertainty0
Orbit TypeAten
MOID0.173761 AU
Observations Used8344
Radar Obs Used1
Gaia Obs Used16
Oppositions6
Arc Total1999-2017
First Observation Used1999-04-20
Last Observation Used2025-08-18
Observations (8901)
Date Type RA Dec Mag Band Observatory
2022-04-20 21:59:32 C 11 40 11.82 +73 05 50.8 V L65
2022-04-21 10:42:03 C 11 40 26.106 +72 42 02.26 U F52
2022-04-21 10:50:18 C 11 40 25.917 +72 41 46.12 U F52
2022-04-21 11:06:57 C 11 40 26.028 +72 41 14.07 U F52
2022-04-21 18:52:11 C 11 40 38.44 +72 26 42.8 q 168
2022-04-21 21:03:13 C 11 40 40.04 +72 22 37.0 q 168
2022-04-21 22:26:06 C 11 40 41.34 +72 20 00.5 q 168
2022-04-22 17:40:04 C 11 41 08.79 +71 45 01.5 q 168
2022-04-22 19:32:11 C 11 41 10.06 +71 41 37.8 q 168
2022-04-22 21:56:06 C 11 41 12.16 +71 37 13.8 q 168
2022-04-22 23:41:04 C 11 41 13.72 +71 34 06.2 V C40
2022-04-22 23:43:54 C 11 41 13.76 +71 34 00.9 V C40
2022-04-22 23:44:14 C 11 41 13.77 +71 34 00.3 V C40
2022-04-22 23:44:57 C 11 41 13.78 +71 33 59.0 V C40
2022-04-22 23:46:01 C 11 41 13.80 +71 33 57.0 V C40
2022-04-22 23:46:21 C 11 41 13.81 +71 33 56.3 V C40
2022-04-22 23:47:04 C 11 41 13.80 +71 33 55.1 V C40
2022-04-22 23:50:21 C 11 41 13.88 +71 33 49.0 V C40
2022-04-22 23:51:02 C 11 41 13.87 +71 33 47.6 V C40
2022-04-22 23:51:25 C 11 41 13.89 +71 33 46.9 V C40
2022-04-22 23:51:45 C 11 41 13.90 +71 33 46.3 V C40
2022-04-22 23:52:48 C 11 41 13.91 +71 33 44.4 V C40
2022-04-22 23:53:31 C 11 41 13.92 +71 33 43.0 V C40
2022-04-22 23:53:52 C 11 41 13.93 +71 33 42.4 V C40
2022-04-22 23:54:14 C 11 41 13.92 +71 33 41.8 V C40
2022-04-22 23:54:55 C 11 41 13.94 +71 33 40.4 V C40
2022-04-22 23:55:18 C 11 41 13.97 +71 33 39.7 V C40
2022-04-22 23:55:39 C 11 41 13.96 +71 33 39.1 V C40
2022-04-22 23:56:22 C 11 41 13.98 +71 33 37.7 V C40
2022-04-22 23:57:03 C 11 41 14.00 +71 33 36.6 V C40
2022-04-22 23:57:26 C 11 41 13.98 +71 33 35.9 V C40
2022-04-22 23:57:46 C 11 41 14.00 +71 33 35.2 V C40
2022-04-22 23:58:07 C 11 41 14.01 +71 33 34.5 V C40
2022-04-22 23:58:29 C 11 41 14.01 +71 33 33.8 V C40
2022-04-22 23:58:50 C 11 41 14.01 +71 33 33.3 V C40
2022-04-23 00:00:13 C 11 41 14.05 +71 33 30.6 V C40
2022-04-23 00:00:36 C 11 41 14.06 +71 33 30.0 V C40
2022-04-23 00:14:53 C 11 41 14.33 +71 33 03.5 V C40
2022-04-23 00:15:34 C 11 41 14.34 +71 33 02.1 V C40
2022-04-23 00:16:18 C 11 41 14.34 +71 33 00.9 V C40
2022-04-23 00:16:38 C 11 41 14.36 +71 33 00.1 V C40
2022-04-23 00:17:00 C 11 41 14.34 +71 32 59.5 V C40
2022-04-23 00:17:42 C 11 41 14.38 +71 32 58.2 V C40
2022-04-23 00:18:04 C 11 41 14.37 +71 32 57.6 V C40
2022-04-23 00:18:25 C 11 41 14.39 +71 32 56.9 V C40
2022-04-23 00:18:45 C 11 41 14.37 +71 32 56.3 V C40
2022-04-23 00:19:07 C 11 41 14.39 +71 32 55.6 V C40
2022-04-23 00:19:28 C 11 41 14.39 +71 32 54.9 V C40
2022-04-23 00:20:32 C 11 41 14.42 +71 32 53.0 V C40
2022-04-23 00:20:52 C 11 41 14.44 +71 32 52.4 V C40
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2022-03-19 21:40:00 186720536 10 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)