873204 (2019 HH4)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3870985550 ± 1.46e-08
Semi-major axis (a)1.5316060712 AU ± 5.73e-09
Inclination (i)33.85720037° ± 2.89e-06
Long. of Asc. Node (Ω)211.46152915° ± 1.43e-06
Arg. of Perihelion (ω)150.69538924° ± 5.54e-06
Mean Anomaly (M)46.95514482° ± 2.75e-06
Mean Motion (n)0.5199860077°/day ± 2.92e-09
Perihelion dist (q)0.93872357 AU ± 2.26e-08
Aphelion dist (Q)2.12448857 AU ± 2.37e-08
Orbital Period1.89548616 yr ± 1.06e-08
Physical Parameters
H (abs. magnitude)19.83
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.248″
Uncertainty0
Orbit TypeApollo
MOID0.021598 AU
Observations Used151
Radar Obs Used8
Oppositions9
Arc Total2004-2025
First Observation Used2004-05-14
Last Observation Used2025-09-20
Observations (155)
Date Type RA Dec Mag Band Observatory
2004-05-14 06:52:10 C 16 30 31.07 +17 25 36.8 X 645
2004-05-14 06:53:19 C 16 30 31.00 +17 25 39.3 X 645
2004-05-14 06:56:55 C 16 30 30.79 +17 25 46.0 X 645
2019-04-04 11:52:51 C 14 18 23.737 -19 55 57.54 V F51
2019-04-04 12:09:39 C 14 18 22.857 -19 55 42.31 V F51
2019-04-04 12:26:26 C 14 18 21.975 -19 55 26.83 V F51
2019-04-25 08:55:38 C 13 48 27.420 -10 37 59.91 U F51
2019-04-25 09:12:55 C 13 48 26.286 -10 37 38.34 U F51
2019-04-25 09:30:07 C 13 48 25.134 -10 37 16.96 U F51
2019-04-28 05:23:32 C 13 44 04.73 -09 12 04.5 U 807
2019-04-28 05:32:20 C 13 44 04.16 -09 11 53.5 U 807
2019-04-28 05:41:07 C 13 44 03.58 -09 11 42.4 U 807
2019-05-01 03:23:50 C 13 39 41.98 -07 44 17.4 u 807
2019-05-01 03:33:48 C 13 39 41.32 -07 44 05.0 u 807
2019-05-01 03:43:12 C 13 39 40.69 -07 43 53.3 u 807
2019-05-01 05:16:16 C 13 39 35.13 -07 42 06.0 V V06
2019-05-01 05:18:51 C 13 39 34.96 -07 42 02.8 V V06
2019-05-01 05:21:26 C 13 39 34.77 -07 41 59.6 V V06
2019-05-01 05:24:00 C 13 39 34.61 -07 41 56.7 V V06
2019-05-02 04:20:33 C 13 38 09.97 -07 13 09.3 u 807
2019-05-02 04:33:33 C 13 38 09.14 -07 12 53.1 u 807
2019-05-02 04:46:34 C 13 38 08.31 -07 12 36.7 u 807
2019-05-02 04:54:05 C 13 38 07.97 -07 12 37.6 u H21
2019-05-02 05:09:01 C 13 38 07.03 -07 12 19.0 u H21
2019-05-02 05:23:39 C 13 38 06.10 -07 12 00.8 u H21
2019-05-02 06:55:48 C 13 38 00.50 -07 10 05.4 o 691
2019-05-02 07:08:13 C 13 37 59.72 -07 09 50.1 o 691
2019-05-02 07:20:38 C 13 37 58.96 -07 09 34.5 o 691
2019-05-05 06:20:21 C 13 33 45.09 -05 41 56.5 o 691
2019-05-05 07:03:12 C 13 33 42.53 -05 41 04.3 o 691
2019-05-05 07:46:02 C 13 33 39.97 -05 40 12.3 o 691
2019-05-07 07:27:10 C 13 30 57.011 -04 42 26.13 U F51
2019-05-07 07:42:55 C 13 30 56.093 -04 42 07.37 U F51
2019-05-07 07:58:40 C 13 30 55.179 -04 41 48.42 U F51
2019-05-07 08:14:26 C 13 30 54.254 -04 41 29.62 U F51
2019-05-10 09:20:29 C 13 26 56.856 -03 15 20.36 V F51
2019-05-10 09:36:46 C 13 26 55.967 -03 15 01.79 V F51
2019-05-10 09:53:07 C 13 26 55.082 -03 14 42.61 V F51
2019-05-10 10:09:26 C 13 26 54.188 -03 14 23.84 V F51
2019-05-11 08:19:46 C 13 25 46.012 -02 48 56.03 V F51
2019-05-11 08:38:25 C 13 25 45.024 -02 48 35.80 V F51
2019-05-23 07:44:51 C 13 13 48.955 +02 05 43.78 V F51
2019-05-23 08:01:08 C 13 13 48.401 +02 05 58.38 V F51
2019-05-23 08:17:25 C 13 13 47.841 +02 06 12.89 V F51
2019-05-25 07:07:39 C 13 12 23.33 +02 47 10.1 o 291
2019-05-25 07:20:09 C 13 12 22.92 +02 47 20.8 o 291
2019-05-25 07:32:37 C 13 12 22.58 +02 47 31.9 o 291
2019-06-21 05:19:03 C 13 08 49.77 +08 51 17.3 o 695
2019-06-21 05:37:31 C 13 08 50.04 +08 51 22.5 o 695
2019-06-21 05:55:59 C 13 08 50.27 +08 51 28.5 o 695
Radar Observations (8)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2023-10-20 12:20:00 932671.326 0.2 Hz 8560 -14 -14
2023-10-20 12:40:00 56529006.18 2 us 8560 -14 -14
2023-10-20 13:20:00 56268166.96 0.5 us 8560 -14 -14
2023-10-21 13:00:00 47672888.84 0.375 us 8560 -14 -14
2023-10-22 12:20:00 648399.423 0.2 Hz 8560 -14 -14
2023-10-22 12:50:00 40431859.42 0.5 us 8560 -14 -14
2023-10-23 11:50:00 374061.773 0.2 Hz 8560 -14 -14
2023-10-23 12:00:00 35596019.69 0.5 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)