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
2025-05-09 20:35:41 C 14 11 24.74 +64 19 36.2 Z L04
2025-05-10 09:19:12 C 14 09 12.862 +64 10 52.79 V T08
2025-05-10 09:23:50 C 14 09 12.036 +64 10 49.48 V T08
2025-05-10 09:31:49 C 14 09 10.596 +64 10 43.79 V T08
2025-05-10 09:47:05 C 14 09 07.829 +64 10 32.92 V T08
2025-05-10 09:49:45 C 14 09 07.354 +64 10 30.94 V T08
2025-05-10 10:37:07 C 14 08 58.819 +64 09 56.84 V T08
2025-05-11 00:09:52 C 14 06 42.876 +64 00 07.06 Z C23
2025-05-11 00:34:51 C 14 06 38.635 +63 59 48.55 Z C23
2025-05-11 00:37:10 C 14 06 38.107 +63 59 46.75 Z C23
2025-05-11 21:32:25 B 14 03 16.325 +63 44 19.72 X K87
2025-05-11 21:48:42 B 14 03 13.562 +63 44 07.33 X K87
2025-05-11 21:57:06 B 14 03 12.158 +63 44 01.43 X K87
2025-05-11 22:07:06 B 14 03 10.514 +63 43 53.83 X K87
2025-05-11 22:17:36 B 14 03 08.774 +63 43 45.66 X K87
2025-05-11 22:28:05 B 14 03 07.049 +63 43 37.99 X K87
2025-05-12 10:22:17 C 14 01 14.873 +63 34 39.94 V T05
2025-05-12 10:26:53 C 14 01 14.107 +63 34 36.26 V T05
2025-05-12 10:34:46 C 14 01 12.838 +63 34 30.00 V T05
2025-05-12 10:51:23 C 14 01 10.092 +63 34 16.86 V T05
2025-05-12 11:05:28 C 14 01 07.776 +63 34 05.41 V T05
2025-05-12 11:10:05 C 14 01 07.046 +63 34 02.03 V T05
2025-05-12 11:17:59 C 14 01 05.794 +63 33 55.40 V T05
2025-05-12 11:34:07 C 14 01 03.146 +63 33 42.44 V T05
2025-05-12 21:02:21 B 13 59 38.398 +63 26 15.79 Z K35
2025-05-12 21:03:23 B 13 59 38.208 +63 26 14.89 Z K35
2025-05-12 21:04:26 B 13 59 38.035 +63 26 14.14 Z K35
2025-05-12 21:05:28 B 13 59 37.894 +63 26 13.24 Z K35
2025-05-12 21:06:29 B 13 59 37.730 +63 26 12.55 Z K35
2025-05-12 21:07:31 B 13 59 37.550 +63 26 11.80 Z K35
2025-05-13 19:06:41 B 13 56 23.39 +63 08 40.6 X G02
2025-05-13 19:10:47 B 13 56 22.74 +63 08 37.2 X G02
2025-05-13 19:14:42 B 13 56 22.14 +63 08 33.9 X G02
2025-05-13 20:53:15 B 13 56 07.546 +63 07 15.06 Z K35
2025-05-13 20:54:17 B 13 56 07.445 +63 07 14.30 Z K35
2025-05-13 20:57:22 B 13 56 06.994 +63 07 11.75 Z K35
2025-05-13 20:58:24 B 13 56 06.804 +63 07 10.96 Z K35
2025-05-13 21:00:10 B 13 56 06.523 +63 07 08.76 V L65
2025-05-13 21:08:32 B 13 56 05.275 +63 07 02.03 V L65
2025-05-13 21:16:53 B 13 56 04.018 +63 06 55.22 V L65
2025-05-13 23:52:27 C 13 55 41.347 +63 04 55.49 V R17
2025-05-14 00:13:25 C 13 55 38.174 +63 04 38.39 V R17
2025-05-14 00:34:15 C 13 55 34.992 +63 04 21.07 V R17
2025-05-14 00:55:36 C 13 55 31.771 +63 04 03.29 V R17
2025-05-14 09:12:51 C 13 54 22.090 +62 57 18.22 V T08
2025-05-14 09:18:12 C 13 54 21.288 +62 57 13.72 V T08
2025-05-14 09:26:49 C 13 54 19.990 +62 57 06.55 V T08
2025-05-14 09:45:27 C 13 54 17.213 +62 56 51.00 V T08
2025-05-14 20:25:45 C 13 52 49.975 +62 47 50.57 Z C23
2025-05-14 20:35:31 B 13 52 48.425 +62 47 43.08 Z K35
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)