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
2022-04-29 06:17:58 C 11 44 49.715 +67 22 02.14 V 703
2022-04-29 23:07:12 C 11 45 15.77 +66 55 42.9 q M16
2022-04-29 23:29:56 C 11 45 16.19 +66 55 07.0 q M16
2022-04-29 23:52:41 C 11 45 16.62 +66 54 30.8 q M16
2022-04-30 02:12:21 B 11 45 22.08 +66 50 58.2 V H89
2022-04-30 04:21:39 B 11 45 24.26 +66 47 36.8 V H89
2022-05-02 22:23:23 C 11 47 13.57 +65 07 57.7 V C23
2022-05-02 22:28:46 C 11 47 13.70 +65 07 49.5 V C23
2022-05-02 22:33:05 C 11 47 13.78 +65 07 43.1 V C23
2022-05-03 05:57:04 C 11 47 26.437 +64 56 55.07 V 703
2022-05-03 06:05:23 C 11 47 26.599 +64 56 42.72 V 703
2022-05-03 06:13:41 C 11 47 26.754 +64 56 30.30 V 703
2022-05-03 06:21:59 C 11 47 26.920 +64 56 17.99 V 703
2022-05-03 21:04:53 C 11 47 53.618 +64 34 44.54 V Z80
2022-05-03 21:09:48 C 11 47 53.755 +64 34 37.34 V Z80
2022-05-03 21:14:43 C 11 47 53.834 +64 34 29.82 V Z80
2022-05-07 05:51:24 C 11 50 20.404 +62 40 06.92 V 703
2022-05-07 05:59:10 C 11 50 20.587 +62 39 56.12 V 703
2022-05-07 06:06:57 C 11 50 20.767 +62 39 45.11 V 703
2022-05-07 06:14:43 C 11 50 20.954 +62 39 33.91 V 703
2022-05-07 21:25:26 C 11 50 50.65 +62 18 32.0 V C23
2022-05-07 21:27:44 C 11 50 50.65 +62 18 28.9 V C23
2022-05-07 21:30:38 C 11 50 50.74 +62 18 24.8 V C23
2022-05-09 19:46:57 C 11 52 21.51 +61 15 30.7 V C40
2022-05-09 19:50:30 C 11 52 21.59 +61 15 25.6 V C40
2022-05-09 19:51:11 C 11 52 21.62 +61 15 24.7 V C40
2022-05-09 19:51:54 C 11 52 21.63 +61 15 23.8 V C40
2022-05-09 19:54:44 C 11 52 21.70 +61 15 19.9 V C40
2022-05-09 19:55:05 C 11 52 21.72 +61 15 19.5 V C40
2022-05-09 19:56:28 C 11 52 21.75 +61 15 17.4 V C40
2022-05-09 19:56:49 C 11 52 21.76 +61 15 17.1 V C40
2022-05-09 19:57:12 C 11 52 21.78 +61 15 16.5 V C40
2022-05-09 19:57:32 C 11 52 21.80 +61 15 16.1 V C40
2022-05-09 19:57:54 C 11 52 21.80 +61 15 15.5 V C40
2022-05-09 19:58:15 C 11 52 21.82 +61 15 15.0 V C40
2022-05-09 19:58:35 C 11 52 21.82 +61 15 14.6 V C40
2022-05-09 20:10:19 C 11 52 22.14 +61 14 58.7 V C40
2022-05-09 20:12:46 C 11 52 22.20 +61 14 55.3 V C40
2022-05-09 20:13:07 C 11 52 22.22 +61 14 54.8 V C40
2022-05-09 20:13:29 C 11 52 22.23 +61 14 54.2 V C40
2022-05-09 20:13:50 C 11 52 22.23 +61 14 53.9 V C40
2022-05-09 20:14:53 C 11 52 22.25 +61 14 52.4 V C40
2022-05-09 20:15:14 C 11 52 22.27 +61 14 51.9 V C40
2022-05-09 20:15:57 C 11 52 22.29 +61 14 51.0 V C40
2022-05-09 20:16:39 C 11 52 22.30 +61 14 50.0 V C40
2022-05-09 20:17:21 C 11 52 22.33 +61 14 49.0 V C40
2022-05-09 20:17:43 C 11 52 22.33 +61 14 48.5 V C40
2022-05-09 20:18:04 C 11 52 22.36 +61 14 48.0 V C40
2022-05-09 20:18:24 C 11 52 22.36 +61 14 47.5 V C40
2022-05-09 20:18:46 C 11 52 22.36 +61 14 47.1 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)