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
2022-06-30 18:55:28 C 12 50 12.42 +37 12 40.3 V C40
2022-06-30 18:56:08 C 12 50 12.46 +37 12 39.5 V C40
2022-06-30 19:07:47 C 12 50 13.09 +37 12 26.6 V C40
2022-06-30 19:09:52 C 12 50 13.21 +37 12 24.3 V C40
2022-06-30 19:16:01 C 12 50 13.55 +37 12 17.5 V C40
2022-06-30 19:22:11 C 12 50 13.88 +37 12 10.7 V C40
2022-06-30 19:29:43 C 12 50 14.30 +37 12 02.3 V C40
2022-06-30 19:32:27 C 12 50 14.46 +37 11 59.3 V C40
2022-06-30 19:51:18 C 12 50 15.674 +37 11 40.16 V B38
2022-06-30 20:01:05 C 12 50 16.186 +37 11 29.76 V B38
2022-06-30 20:11:17 C 12 50 16.726 +37 11 18.02 V B38
2022-06-30 20:17:51 C 12 50 17.112 +37 11 11.15 V B38
2022-06-30 20:26:18 C 12 50 17.570 +37 11 01.57 V B38
2022-06-30 21:30:09 C 12 50 21.11 +37 09 50.0 V G34
2022-06-30 21:33:15 C 12 50 21.27 +37 09 46.5 V G34
2022-06-30 21:36:22 C 12 50 21.45 +37 09 43.2 V G34
2022-06-30 21:39:28 C 12 50 21.62 +37 09 39.7 V G34
2022-06-30 21:42:35 C 12 50 21.78 +37 09 36.3 V G34
2022-07-01 06:57:27 C 12 50 52.750 +36 59 33.50 U I41
2022-07-01 06:58:48 C 12 50 52.829 +36 59 31.99 U I41
2022-07-01 07:14:59 C 12 50 53.921 +36 59 19.72 V T08
2022-07-01 07:23:32 C 12 50 54.384 +36 59 10.32 V T08
2022-07-01 07:39:57 C 12 50 55.265 +36 58 52.00 V T08
2022-07-01 19:17:24 C 12 51 34.61 +36 46 07.3 V C40
2022-07-01 19:32:27 C 12 51 35.43 +36 45 50.6 V C40
2022-07-01 19:34:32 C 12 51 35.54 +36 45 48.3 V C40
2022-07-01 19:47:33 C 12 51 36.26 +36 45 33.9 V C40
2022-07-01 19:53:00 C 12 51 36.56 +36 45 27.8 V C40
2022-07-01 19:55:05 C 12 51 36.67 +36 45 25.6 V C40
2022-07-01 20:18:19 C 12 51 37.96 +36 44 59.8 V C40
2022-07-01 20:21:45 C 12 51 38.15 +36 44 56.0 V C40
2022-07-01 20:36:48 C 12 51 38.98 +36 44 39.4 V C40
2022-07-01 22:00:56 C 12 51 43.86 +36 43 07.9 V C23
2022-07-01 22:38:21 C 12 51 45.93 +36 42 26.3 V C23
2022-07-02 18:07:48 C 12 52 52.16 +36 21 14.5 V C40
2022-07-02 18:11:13 C 12 52 52.34 +36 21 10.7 V C40
2022-07-02 18:11:55 C 12 52 52.39 +36 21 09.9 V C40
2022-07-02 18:14:38 C 12 52 52.53 +36 21 07.0 V C40
2022-07-02 18:18:45 C 12 52 52.76 +36 21 02.5 V C40
2022-07-02 18:33:08 C 12 52 53.54 +36 20 46.6 V C40
2022-07-02 18:35:11 C 12 52 53.65 +36 20 44.4 V C40
2022-07-02 18:36:33 C 12 52 53.73 +36 20 42.9 V C40
2022-07-02 18:39:59 C 12 52 53.91 +36 20 39.1 V C40
2022-07-02 19:19:28 C 12 52 56.09 +36 19 55.5 V C40
2022-07-02 19:24:15 C 12 52 56.35 +36 19 50.2 V C40
2022-07-02 19:26:18 C 12 52 56.47 +36 19 47.9 V C40
2022-07-02 19:27:00 C 12 52 56.50 +36 19 47.2 V C40
2022-07-02 19:29:02 C 12 52 56.62 +36 19 44.9 V C40
2022-07-02 19:31:05 C 12 52 56.73 +36 19 42.6 V C40
2022-07-02 19:35:12 C 12 52 56.96 +36 19 38.0 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)