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
2022-07-08 07:59:40 C 13 00 32.141 +33 55 10.85 V T08
2022-07-08 08:16:44 C 13 00 33.103 +33 54 51.91 V T08
2022-07-08 18:26:23 C 13 01 08.68 +33 43 41.3 V C40
2022-07-08 18:27:45 C 13 01 08.76 +33 43 39.7 V C40
2022-07-08 18:28:28 C 13 01 08.80 +33 43 39.0 V C40
2022-07-08 18:31:12 C 13 01 08.96 +33 43 36.0 V C40
2022-07-08 18:31:52 C 13 01 08.99 +33 43 35.3 V C40
2022-07-08 18:37:22 C 13 01 09.30 +33 43 29.1 V C40
2022-07-08 18:38:02 C 13 01 09.34 +33 43 28.4 V C40
2022-07-08 18:41:29 C 13 01 09.53 +33 43 24.5 V C40
2022-07-08 18:46:16 C 13 01 09.81 +33 43 19.3 V C40
2022-07-08 18:55:52 C 13 01 10.35 +33 43 08.7 V C40
2022-07-08 19:03:24 C 13 01 10.78 +33 43 00.4 V C40
2022-07-08 19:04:46 C 13 01 10.85 +33 42 58.8 V C40
2022-07-08 19:06:48 C 13 01 10.97 +33 42 56.5 V C40
2022-07-08 19:19:09 C 13 01 11.67 +33 42 42.9 V C40
2022-07-08 19:30:48 C 13 01 12.31 +33 42 30.1 V C40
2022-07-09 06:10:43 C 13 01 49.654 +33 30 56.09 V T05
2022-07-09 06:15:16 C 13 01 49.910 +33 30 51.05 V T05
2022-07-09 06:33:46 C 13 01 50.938 +33 30 30.42 V T05
2022-07-09 06:43:34 C 13 01 51.473 +33 30 19.66 V T05
2022-07-09 18:49:26 C 13 02 33.66 +33 16 59.7 V C40
2022-07-09 18:50:06 C 13 02 33.71 +33 16 59.0 V C40
2022-07-09 18:53:32 C 13 02 33.90 +33 16 55.3 V C40
2022-07-09 18:54:12 C 13 02 33.94 +33 16 54.6 V C40
2022-07-09 18:59:42 C 13 02 34.25 +33 16 48.4 V C40
2022-07-09 19:01:04 C 13 02 34.33 +33 16 46.9 V C40
2022-07-09 19:03:06 C 13 02 34.44 +33 16 44.7 V C40
2022-07-09 19:09:58 C 13 02 34.84 +33 16 37.1 V C40
2022-07-09 19:11:20 C 13 02 34.91 +33 16 35.6 V C40
2022-07-09 19:15:27 C 13 02 35.15 +33 16 30.9 V C40
2022-07-09 19:16:48 C 13 02 35.23 +33 16 29.4 V C40
2022-07-09 19:18:52 C 13 02 35.34 +33 16 27.1 V C40
2022-07-09 19:22:17 C 13 02 35.54 +33 16 23.3 V C40
2022-07-09 19:33:55 C 13 02 36.20 +33 16 10.4 V C40
2022-07-09 19:46:16 C 13 02 36.90 +33 15 56.8 V C40
2022-07-09 19:46:56 C 13 02 36.94 +33 15 55.9 V C40
2022-07-09 19:54:28 C 13 02 37.37 +33 15 47.5 V C40
2022-07-09 19:55:10 C 13 02 37.41 +33 15 46.8 V C40
2022-07-09 19:57:12 C 13 02 37.53 +33 15 44.6 V C40
2022-07-09 20:03:21 C 13 02 37.88 +33 15 37.8 V C40
2022-07-09 20:08:50 C 13 02 38.20 +33 15 31.7 V C40
2022-07-09 20:12:57 C 13 02 38.44 +33 15 27.0 V C40
2022-07-09 20:19:47 C 13 02 38.83 +33 15 19.4 V C40
2022-07-09 20:25:16 C 13 02 39.14 +33 15 13.3 V C40
2022-07-09 20:28:41 C 13 02 39.34 +33 15 09.5 V C40
2022-07-09 20:46:31 C 13 02 40.36 +33 14 49.8 V C40
2022-07-09 20:47:11 C 13 02 40.40 +33 14 49.0 V C40
2022-07-10 07:10:34 C 13 03 16.805 +33 03 32.69 V T05
2022-07-10 07:15:08 C 13 03 17.059 +33 03 27.58 V T05
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)